Mydax 1M9W-T User's Manualbl831.als.lbl.gov/~gmeigs/PDF/mydax.pdf · 1M9W-T WATER-COOLED CHILLER USER'S MANUAL MYDAX, INC. 12260 Shale Ridge Lane Auburn, CA 95602 ... safety interlock

advanced temperature control technology

MYDAX, INC. 1M9W-T WATER-COOLED CHILLER USER'S MANUAL

MYDAX, INC. 12260 Shale Ridge Lane Auburn, CA 95602 530-888-6662 FAX: 530-888-0962

http://www.mydax.com

Revision History: Rev. Date Purpose 0 3/9/2006 Released

SPECIFICATIONS.................................................1 SAFETY & ENVIRONMENTAL CONCERNS....2 SYSTEM OVERVIEW ..........................................4 INSTALLATION ...................................................6 FRONT PANEL CONTROLS ...............................9 ALARM & ERROR MESSAGES........................ 11 DIAGNOSTIC DISPLAYS.................................. 12 SERVICE & WARRANTY............................. 15,16 SHIPPING & STORAGE PROCEDURE ............ 17

Table of Contents

1M9W-T

APPENDIX A RS-232 INTERFACE COMMANDS

DRAWINGS PARTS LIST FRAME DRAWING FLUID DIAGRAM ELECTRICAL DIAGRAMS

DRAWINGS - Printed Circuit Boards BOARD SCHEMATICS

MSDS R-22 Refrigerant

Mydax, Inc. 1M9W-T Precision Water Cooled Chiller

Lawrence Berkeley Laboratory 1 Users Manual rev 0 March 9, 2006

SPECIFICATIONS SYSTEM CAPACITIES

Temperature Range 15°C to 25°C (59°F to 77°F) Temperature Stability ± 0.02°C Cooling Capacity @ +20°C 2,500 Watts (8,540 BTU/hr) Polypropylene Reservoir Volume 20 gallons

Recirculating Fluid Low Conductivity Water Recirculation Flow, Pressure 10 GPM at 100 PSI

Recirculating Supply/Return Fittings 1" Stainless Steel FNPT Fill Port 3/4" Stainless Steel MNPT Fittings for Condenser supply/return 1/2" Stainless Steel FNPT Condenser Cooling, Facilities Water 1.5 GPM @ 24°C (75°F), 20 PSI differential

Refrigerant Charge R-22, 5 LBS. †

Electrical Service 208/230VAC, 60 Hz, 3 phase, 20 amp service With 10’ power cord and L15-30P plug. Overall Size 58"H x 24"W x 32"D, 475 lbs. dry weight

STANDARD FEATURES

This chiller is complete with our computer-controlled low-stress, refrigeration circuit, recirculating pump and fluid reservoir. The refrigeration circuit uses all-brazed construction for extra strength; the heavy-duty frame is constructed of welded steel tubing equipped with locking casters.

The microprocessor-based control system includes an extensive computer monitoring capability including comprehensive controls, error messages and diagnostics. System status is indicated via an 80 character alphanumeric LCD (liquid crystal display) and with colored LEDs (light-emitting diodes). The control keyboard employs membrane switches with a sealed polycarbonate overlay for protection from liquid spills.

† MSDS are included in Appendix C of this manual.


Lawrence Berkeley Laboratory

SAFETY AND ENVIRONMENTAL CONCERNS Your Mydax chiller was designed to give years of trouble-free operation. Features were designed into the unit to provide early warning of failure mechanisms so that catastrophic failures can be avoided. Whether a chiller is at the factory or in the field, diagnostic information gives Mydax engineers insight to the operation of each stage of the refrigeration and recirculation circuits without having to attach service gauges. 1. Warning & Error Messages: including coolant over-temperature warning & shutdown, low tank level

warning & shutdown and others (see ERROR MESSAGES section). 2. System Diagnostics: including coolant & refrigerant temperatures, valve drives and parameters (see

DIAGNOSTIC DISPLAYS section). 3. Hardware safeguards include a series-wired interlock circuit which protects refrigerant high pressure,

thermal protection of the pump and compressor motors. Safety is important when using and servicing the chiller unit. Warning labels have been placed on the chiller in areas where potentially harmful conditions exist and in this manual to bring attention to such conditions. This chiller uses materials that are subject to environmental regulations; be sure to familiarize yourself with these components and their associated regulations pertinent to your location. Warnings have been categorized according to the following guide:

! NOTICE Provides information that is important for proper installation, operation, or maintenance, but not critical to safety. Includes regulatory notices.

! CAUTION Identifies situations where improper action could cause damage to the equipment or product, or cause minor physical discomfort.

! WARNING Identifies situations where improper actions could cause minor to moderate injury or impaired health.

! DANGER Identifies potentially lethal hazards, where improper actions could cause death, or serious injury or disability, such as loss of sight or limb.

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High Temperatures

Label 1

This "Hot Surface" caution label has been placed on the inside of the chiller cabinet, near the compressor's discharge area where the hot compressed refrigerant makes components as hot as 120°C. This label is placed on the Oil Separator and the Muffler as well. The label indicates that the area is hot and should not be touched until the unit is allowed to cool down.



Fluids and Chemicals

This chiller contains fluids which may be slippery if spilled on the floor. The use of a drip pan may be required as a means of avoiding a potentially hazardous spill. Clean up of any spills should follow the guide provided in the MSDS. Service of the refrigeration equipment shall be performed only by qualified and certified, if necessary, personnel. Refrigerant gas is not to be vented to the atmosphere; it shall be handled according to regulations set forth by the local environmental authorities. R-22 is fluorocarbon type materials and subject to environmental regulations. The compressor uses POE oil; this MSDS is available from Mydax upon request. The compressor is hermetically sealed and no service should be required. In the event that cleanup is necessary, absorb oil with oil absorbent material and dispose of as a hazardous waste. Follow approved cleanup procedures as listed in the MSDS. Electrical

Label 2

This "Hazardous Voltages" danger label has been placed on the clear guard inside the electrical panel box and on each power junction box within the chiller cabinet. The label indicates that there are hazardous voltages of 208/240VAC on the components within the protective enclosure. Before servicing, the equipment shall be disconnected from the source supply and locked out with an appropriate device. Electrical maintenance shall be performed only by qualified electricians and trained service personnel. LITHIUM BATTERY The M1001 controller contains a Lithium battery to retain setup parameters and calibration data. If this battery were to fail (see Test Panel 7 in the Diagnostic Displays section of this manual), it shall be replaced with a compatible type, and the replaced battery shall be recycled as required by local environmental regulations.




SYSTEM OVERVIEW

SYSTEM FLUID SCHEMATIC REFRIGERATION Refer to drawing #D3021, the fluid (refrigerant & fluid) schematic. The heart of the design is the evaporator refrigerant valve, shown at the left side of the drawing. This is a pulse-width-modulated valve, controlled directly by the system's embedded microprocessor. By controlling the duration of the openings of the valve, a precisely determined flow of refrigerant is sent to the evaporator, allowing for exceptionally stable recirculating temperatures. This system is designed to control the recirculating output temperature to ±0.02°C or better over the entire temperature range. The microprocessor sets the positions of the evaporator valve based upon the system heat load. If the load increases, the evaporator valve is opened for longer durations, passing more refrigerant. If the load decreases, the valve is opened for shorter durations, passing less refrigerant. Using this technique Mydax is able to run in load conditions of no-load to full-load and all combinations in between. During normal operation, the duration of the valve opening remain nearly constant. Only major changes in heat load or system-wide power cycling cause large changes in the valve drives. In the case of a step-wise change in heat load, the microprocessor quickly drives the valves to the new settings and refrigerant flow soon settles at the proper level. The controller sets the valve drives based primarily upon data received from RTD's (resistance temperature devices) located about the circuit. The drawing shows RTD's at the output line leading from the recirculating pump, in the reservoir, and in the refrigeration circuit between the condenser and receiver. The controller reads these and other sensors constantly and sets the refrigerant valve accordingly. Thus refrigerant flow is truly proportioned, allowing continuous compressor operation without the normal addition of pressure-actuated hot gas bypass valves. All other refrigeration circuit components are used as in conventional systems. All permanent copper joints in the refrigeration circuit are brazed for extra strength. Much of the circuitry is insulated to eliminate cooling capacity loss and unpredictable operation due to drafts or fluctuating ambient air conditions. RECIRCULATION This system is designed to recirculate low conductivity water. It is not designed to recirculate solutions of automotive antifreeze. Approximately 20 gallons are required to fill the polypropylene reservoir and associated plumbing to its nominal fill level. The heating elements are stainless steel cartridge heaters. The evaporator is a coaxial heat exchanger, located in the recirculating return line leading to the reservoir. The reservoir is fitted with two level sensors. One level sensor drives a FILL TANK alarm at the main panel, indicating coolant level has dropped somewhat. The second sensor, the TANK EMPTY sensor, is connected to the safety interlock loop and shuts the system down if tripped. The pump’s recirculation flow and pressure may be adjusted by the VFD setting on Test Panel 5. This new feature allows the user to optimize the speed of the pump to get the desired flow rate and yet keep the work done by the pump to a minimum, which will maximize the cooling power available to the load. An over-pressure switch is set to trip at 115 psi to prevent exceeding the horsepower rating of the pump motor.



SYSTEM ELECTRICAL DIAGRAM Refer to drawing #D3022, the system electrical wiring diagram. The central component of the electrical system is the M1001 controller; it is microprocessor-based and communicates with and controls various other circuit boards and components. Additional circuitry is laid out on PC boards mounted in the main electrical control cabinet. The controller is powered as long as the system circuit breaker is set, receiving 24 VAC power from a step-down control transformer. The M1001 controller "reads" the RTD's in the system via board M1002, the Input Circuit Board, mounted in the electrical cabinet. RTD's are included for the recirculating fluid temperatures, as well as for the refrigerant circuit. Also routed through the M1002 board are the 100 Ohm and 120 Ohm precision RTD calibration resistor circuits. The refrigerant valve and heater drive signals are routed through the M1004 power board. These signals are controlled up to 20 times each second to meter the amount of refrigerant through each valve and to control the heater to the desired power. SAFETY INTERLOCK A series-wired safety interlock loop protects all Mydax systems, disconnecting AC power from nearly all circuitry. If any link in the loop is opened, the PUSH RESET message is displayed and the audible alarm is sounded. Once the fault is corrected, the Reset button must be used to re-establish loop integrity. See Table 1, and the electrical diagram. The system interlock loop is routed mostly via a terminal block on the M1002 board. The reset switch serves to feed power to the relay RL1. When energized, the contactor feeds power back to the relay so the reset switch may open up without cutting off power to the relay. If any component in the interlock loop opens, power to the loop is interrupted. The microprocessor senses this via the contactor RL1 connection at pin 23 of the M1002 board. Provided the system has power, if the loop trips out, the controller displays the PUSH RESET error message. Other diagnostic messages are also displayed if the temperature or level sensors are tripped. The loop must be reset when the fault condition is resolved. Interlock Item Purpose Location EMO Switch Emergency Off Front panel, near control panel Pump’s VFD fault Protects pump motor Inside chiller cabinet near pump Refrigerant High Pressure Switch Detect over-pressure,

Opens at 375 PSI= 64°C (148°F) Resets at 265 PSI= 50°C (122°F)

Near input to receiver

Pump Over Pressure Switch Protects pump and external plumbing, set to 115 psi.

Inside chiller, lower rear, near output bulkhead fitting.

Tank Over-Temperature Switch Prevents thermal run-away >49°C Inside tank, integrated into lid Tank Empty Float Switch Protects tank heater and pump Inside tank, suspended from lid Relay Coil, RL1 Latches circuit and gives indication

to microprocessor. Inside electrical cabinet

Table 1 The M1002 board also routes signals for the FILL TANK float switch. If this sensor trips, the controller displays a FILL TANK alarm to alert the user that the recirculation fluid is low. The “AC Fault” line, pin 21 of the M1002 board is driven by the Power Line Monitor to alert the user of a power problem or incorrect phase sequence. EMERGENCY OFF BUTTON The "EMO" or "Emergency Off" condition is established by pressing the red mushroom type EMO button. This opens the Safety Interlock Loop as described above, which opens the main power contactor. The tripped EMO state disengages the high power components (compressor and heaters) and leaves the control voltage for the microprocessor and VFD in force so that the controller can continue to record the status and condition of the refrigeration components. A compressor crankcase heater is provided and is powered as long as the system circuit breaker is set; the AC line voltage is present even though the EMO is pressed.



INSTALLATION LOCATING AND SECURING

This water-cooled chiller is rated for indoor use; refer to the specifications page at the beginning of this manual for a summary of the electrical and water facilities requirement. The unit is shipped with a refrigerant charge and does not require charging prior to use. Environmental regulations require that any necessary refrigeration service will be performed by a qualified and certified, if necessary, refrigeration technician. Electrical servicing shall be performed by a trained and qualified electrician.

In order to allow the compressor's oil to separate from the refrigerant, it is recommended that a period of one-half hour be allotted for the crankcase heater to warm the compressor. These instructions will guide the installation such that the electrical connections are performed first, and then power of the unit is turned on. While the crankcase heater is warming the compressor, the plumbing connections can be made and the reservoir filled with fluid.

POWER CONNECTIONS

Main electrical power connection to this system is made via the supplied power cord attached at the rear bulkhead. This routes forward to the electrical control cabinet located on the front face of the chiller. The 20 amp circuit breaker supplies the compressor, pump, heater, and electronic circuitry. Appropriate circuit protection is required according to the NEC and local ordinances.

! DANGER: Prior to any electrical servicing inside either the power box or the chiller cabinet, disconnect all power sources and lockout the main breakers with a proper lockout device.

Once the unit is wired and plugged in, turn on the main circuit breakers mounted on the front of the system. The unit will not run without the proper phase wiring, if the display flashes “AC Power Fault”, disconnect power and swap two of the incoming phase lines and re-check. A message similar to the following appears on the LCD main display:

Tank --- Warmup Delay --- Local Set

25.02°C 25.0°C

This display indicates that the microprocessor is initializing. After a few seconds, the controller will finish initializing and the "Warm-up Delay" message will return to simply “Push Reset”. On initial power-up, this is normal until phase wiring is correct and fluid levels are properly adjusted. If an “Ac Power Fault” alarm is displayed, the internal phase detector is indicating that the phase of the main power must be reversed. To resolve this alarm, unplug the power cord and swap any two of the three incoming power lines going to the chiller.

NOTICE: The system should be powered for a period of at approximately one hour before initial starting, to allow the crankcase heater to separate the refrigerant from the oil. This helps ensure good lubrication and extends the life of the compressor. !



Law

CONDENSER WATER HOOKUP

The condenser inlet and outlet fittings are 1/2" stainless steel female pipe thread (FNPT). Plumb in facilities cooling water capable of at least 1.5 GPM at the fitting marked "CONDENSER IN". Plumb the return line to the "CONDENSER OUT" connection. To insure adequate cooling, be sure cooling source is turned on and at a temperature of 75°F (24°C) or less before starting the system. The chiller is factory set for an inlet pressure of 60 PSI. If after operation it is determined that the supply pressure is too low, adjustment of the condenser flow control valve will be necessary; consult Mydax for more information.

PLUMBING INTERFACE CONNECTIONS

The chiller's 1” stainless steel FNPT fitting labeled TANK OUT must be plumbed to the inlet of the device to be cooled. The outlet of the device to be cooled must be plumbed to the chiller's 1” stainless steel FNPT fitting labeled TANK IN. This system is equipped with a ½” FNPT fitting labeled DRAIN. For the convenience of future draining procedures, it is recommended that a valve be installed in the drain port prior to the initial filling of the reservoir. The recirculating loop is under pressure when the system is operating.

! NOTICE: Check all fluid interface connections now to ensure against leaks.

FILL RESERVOIR

This Chiller/Heater has a temperature range of +15°C to +25°C and is designed to recirculate low conductivity water. Ensure that the fluid is correct in order to prevent freeze damage within the system. Do not use automotive antifreeze in this system. Approximately 20 gallons are required to fill the reservoir and associated plumbing to the nominal level; more

ay be required based upon the size of the fixture plumbed to the output. Using an approved step ladder that eets OSHA requirements, fill the system's reservoir. Use a funnel or insert a hose into the ¾” fill port on the

op of the reservoir and fill to the proper tank level.

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To satisfy the TANK EMPTY float switch, add approximately 10 gallons of fluid, then press the RESET button located on the front of the chiller. The PUSH RESET message should go away, leaving only a FILL TANK message flashing on the display and an audible alarm. At this point, continue adding fluid until the FILL TANK message goes away and the audible alarm stops. Additional fluid will have to be added once the pump has circulated fluid into the heat exchanger cavities and external plumbing. Repeat this procedure as necessary to fill the recirculation loop. The reservoir must be vented to provide for the expansion and contraction of the fluid as it heats and cools. The Vent cap has a small hole to allow the unit to “breathe”

SH RESET BUTTON

The RESET button, located near the bottom of the front electrical panel, must be pushed prior to starting the system if an error in the interlock circuit (such as TANK EMPTY or latched EMO button, etc.) has occurred. This push-button resets the safety interlock circuit making it ready to protect the unit and the operator, and clears the display of any error messages.

7 rs Manual rev 0 rch 9, 2006


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ACCESS PANELS

Within the aluminum panels and steel frame are all of the chiller's components. Access to these components, such as the compressor, tank, pump, heat exchangers, etc. is made by removing the panels. These panels are secured with #2 phillips head screws with finish washers for a clean look. Removal of these panels is unnecessary except for service access. Service of the refrigeration equipment shall be performed only by qualified and certified, if necessary, personnel. To remove the panels, remove the screws and carefully lower the panel to the floor. An oil sight gauge is visible on the side of the compressor. The recirculation pump and associated VFD are located on the left-hand side of the chiller. Access to the electrical panel is obtained by removing the front aluminum panel, below the controller, that encompasses the breakers and reset button. By removing the perimeter #2 phillips screws, a clear plastic shield is accessible. This shield provides tooled and guarded access to the hazardous electrical voltages within the panel.

! DANGER: Prior to any electrical servicing inside of either the power box or the chiller cabinet, disconnect the power source and lockout the main breaker with a proper lockout device.

PARTICLE FILTER

A standard 10 micron particle filter is located inside the chiller cabinet, near the rear. Remove the rear upper screen access panel to change this filter. First, remove the insulation boot and then unscrew the filter housing. Replace cartridge with Mydax part # 07-0810-09120, or equivalent.

INITIAL STARTING

Read the following section on Front Panel Controls for details on the panel operation.

nce the above procedures are completed and the safety interlock loop is satisfied, press the RUN PUMP or TART key.

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FRONT PANEL CONTROLS All Mydax chillers are controlled by a microprocessor which is accessed via the system control panel. System controls are simple, yet powerful, with built-in diagnostics and error messages. POWER LED: Indicates unit is powered (the circuit breaker is set). RESET: This button must be pressed prior to system start-up to energize the interlock loop. It is

also used to reset a fault or fatal alarm. EMO: This RED "mushroom" button breaks the interlock loop stopping the chiller by opening a

contactor and removing electricity from the high power components. It will cause a PUSH RESET message to be displayed; this button is NOT to be used to stop the pump and compressor, except in emergency.

RUN PUMP: Starts only the pump, turns on the Pump LED. If the chiller is already running (with the

START button) this will STOP the compressor and leave the pump running. START: Starts compressor and pump and turns on LED's. Once the start-up routine is complete the

display changes to the MAIN DISPLAY:

Tank --- MYDAX --- Local Set 25.01°C 25.0°C

DISPLAY:

Shows the actual Output (Tank) Temperature and Setpoint Temperature in °C. Also indicates that the LOCAL SET temperature mode is enabled.

STOP: Stops both the compressor and pump. MUTE ALARM: May be used to deactivate audible alarm for 10 minutes, leaving alarm LED on. Pressing

the CLEAR key reactivates the alarm, which sounds until the fault condition is eliminated or the MUTE ALARM switch is depressed again. Pressing MUTE ALARM when no alarm is active causes the alarm to sound once and the TEST ALARM display to appear.

SET: Enables SET TEMPERATURE MODE. SET MODE is disabled from panel if an alarm

is active or if the unit is in REMOTE (RS-232 SET mode). To set, depress:

SET: "Set Mode" appears at the right of the display. Cursor flashes at "units" digit of the temperature display.

ARROWS KEYS: Changes temperature setting in one degree increments unless

"." (decimal) key is depressed.

"." (DECIMAL): Moves cursor to the "tenths" digit of the temperature display and causes arrow keys to change setting in tenths of a degree.

KEYPAD: Changes temperature setting by entering numbers directly.

CLEAR: Erases an incorrect entry.

ENTER: Selects temperature setting and deselects SET mode.




TEST: Initiates Test Mode. See description under DIAGNOSTIC DISPLAYS section of this manual.

ENTER: Enters temperature selections while in the SET mode. CLEAR: Erases incorrect temperature selections; exits Test Mode; clears Mute Alarm selection. MODE: Toggles between the RS-232C remote control mode and Local Set mode. Pressing this

key is the same as sending the "RO" and "RF" commands into the RS-232 port (see Appendix A).

ARROW KEYS: Changes temperature setpoint by 0.1 or 1°C increments/decrements; toggles tank

temperature, setpoint temperature and evaporator data view modes for multiple channel systems.

"." (DECIMAL): Display shows model number and software revision date and copyright:

" Model # : Date Copyright 2000 Mydax, Inc. "

1M9W-T 2006.03.01 Copyright 2006 Mydax, Inc.

X & Y: For future use. Z: See Test Panel 9 in the Diagnostic Displays Section.




ALARM and ERROR MESSAGES A unique feature of Mydax systems is the error messages displayed on the front panel display. The microprocessor constantly checks various points and parameters throughout the system and automatically displays messages when error conditions are sensed. Many displays are announced by an audible alarm and red LED indicator. The alarm persists until the fault condition is resolved, provided that the fault condition was not fatal, resulting in a system shutdown. WARNING ALARMS: Condenser Hot Indicates high discharge pressure condition with temperature over +50°C (122°F). This is only a

warning message until the temperature reaches 65°C (149°F), where the microprocessor shuts down the system. A separate mechanical over pressure switch, part of the safety interlock loop, also can shut the system down in case of an over pressure condition. The purpose of this message is to allow maintenance workers to correct the problem at an early stage. Check condenser cooling water pressure and flow rate; also could be caused by scale build-up within the condenser.

Fill Tank Indicates low tank liquid level. Fluid will shrink considerably when cold, so the fluid level should

be adjusted when the chiller is at its coldest temperature. SHUTDOWN ALARMS: Push Reset Indicates that a fatal alarm in the interlock circuit has occurred and the operator must push the

“Reset” button on the front face of the chiller in order to restart the system. If this error occurs, it is not necessarily possible to discern which item in the interlock loop failed unless other messages are also being reported. Test Panels #8 and #9 may help indicate the fault.

See the electrical description in the System Overview section for details on how the interlock loop functions.

Tank Too Hot Indicates that the reservoir temperature is more than 10°C above the highest allowable set point of

25°C. Microprocessor shuts down the system at 35°C output temperature. Low AC Line Indicates a low voltage condition exists on the input AC line., the system is shut down. See VAC

on test panel #4 for current reading. AC Power Fault Generated by the Line Voltage Monitor, the system is shut down to prevent damage due to: low

AC voltage (<200V) or unbalance (4% for > 5 seconds), phase loss or phase reversal (> 100 milliseconds).

Freon Low If the suction pressure is for more than 60 seconds, this will indicate refrigerant pressure is low.

The chiller has likely developed a refrigeration leak and is low on refrigerant charge. Have unit serviced by Mydax or a qualified service center.

Open RTD Indicates that an RTD connected to the M1002 Input Board has failed and that the system has shut

down to prevent damage due to lack of data. The RTD at fault may be located by accessing Test Panel #8. The RTD must be replaced for the system to operate again.



DIAGNOSTIC DISPLAYS Mydax chillers are provided with a computerized self-diagnostic capability. This system is equipped with 9 different test panels, which are accessed by pressing the TEST key, followed by the test panel number. Diagnostic mode is terminated by pressing the CLEAR key, and results in a display similar to that below: MAIN DISPLAY Tank --- MYDAX --- Local Set

25.10°C 25.0°C Diagnostic messages are displayed on the main LCD. Display #5 automatically appears when the TEST key is first depressed. Once in diagnostic mode, other displays can be selected by depressing number keys 1 through 9. The following describes each of the test displays: TEST PANEL #1:

Valve 7 Htr 8 Avg Valve 5 Htr 6

Numbers represent the drive signals for the evaporator valves and tank heater. The range is 0 (minimum) to 20 (maximum drive). Each digit represents 5% of the available drive voltage. Avg Valve shows a 32 second running average of the valve's drive, displayed above it.

TEST PANEL #2:

This display shows the

Limit = Max EvaporaSupHt. = n/a The condenser readingsends the CONDENSE

TEST PANEL #3:

The first 3 sets of 4-dservos for up to 3 rescontrol servo to near ze

The first 2 digits in eadecimal = 1.0°C. Thisactual temperature is acontinuously monitored

The second 2 digits indecrements once a secper offset change. Whto "0A" Hex (10 decicontrol setpoint to main

The center of the disp

Users Manual rev 0 March 9, 2006

4.0 -4.8 48.2 35.0
Limit Suct Psia Sup.Ht SHavg Condr
refrigerant circuit RTD temperatures in °C. The display reads:

tor Temp Suct = Suction Temp Psia = Suction Pressure, Absolute SHavg. = n/a Cond = Condenser Temp

is a direct indicator of condenser temperature and pressure. The microprocessor R HOT error message if the condenser temperature exceeds +54°C.

302B 0000 0000 Z 0.00 G 51.95 14.4 SS-1 SS-2 SS-3 RTD Reference SH Avg

igit numbers are hexadecimal. They represent correction values for the slow gain ervoirs. The function of this servo is to dynamically adjust the main temperature ro error and thereby maintain temperature stability.

ch set of 4 show the gain offset. Each increment equals 0.05°C, so 14 Hex = 20 value is internally subtracted from the operator-entered temperature setpoint if the bove the setpoint, thus reducing the coolant temperature. The setpoint offset is by the controller and adjusted according to current conditions.

each set of 4 show the time prescaler. This is a counter which increments or ond and times the next update of the setpoint offset. A typical value is 20 seconds en the count reaches "00", the offset may or may not be changed and the count resets mal). Together these numbers show that the controller is internally changing the tain temperature stability, and give the magnitude and timing of the change.

lay shows readings for the RTD "Zero" and "Gain" calibration resistors. Precision 12



resistors 100W and 120W are used as a reference. TEST PANEL #4:

1.182 -0.000 +1.780 + 25.46 2 255 Ext 1 Ext 2 Ext 3 VAC Secs

This display shows auxiliary voltmeter readings of Ext 1, Ext 2 and Ext 3. These are unused in this system. VAC is the 24 VAC internal control voltage. A typical value is in the range of 22.00 to 28.00. To the right of this value is an unused number ranging from 0 to 3. At the far right of this display is a time indicator in seconds. The timer stops at 255 seconds and is used internally for turn on routine procedures.

TEST PANEL #5: 20.00 20.0 0.0 96%

Tank Set DgMin VFD

This is the display that comes up when the TEST button is first pressed. This diagnostic shows the Output RTD (Tank) temperature in °C, the Output Setpoint temperature and Output temperature slope. Slope is a measure of the direction and amount of the output temperature change per 60 seconds. Additionally, the pump’s variable frequency drive (VFD) can be controlled to increase or decrease the available output flow and pressure. While on this display, use the UP and DOWN arrows, to the left of the keypad, to adjust the speed setting of the VFD. To view the actual frequency (in Hz), or gain access to the VFD (Allen Bradley), remove the left-side access panel of the chiller. The VFD is programmed according to the notes on the electrical schematic.

TEST PANEL #6:

1 This diagnostic showstemperature with resolu

TEST PANEL #7:

This display shows vooutputs. Each resistancapproximately equal, bu The refrigerant type tha

The two numbers at theevaporator temperatureregulate the superheat te

The second line of the M1001 circuit board, urun/event recorder depi

Users Manual rev 0 March 9, 2006

9.80 19.79 20.00 20.02

the Tank temperature with resolutions of 0.05°C and 0.01°C, and the Output tions of 0.05°C and 0.01°C.

+ 0.000 + 0.000 + 0.000 R22 6.00 0 - 0.000 - 0.000 - 0.000 Bat. OK

ltmeter readings for up to 3 optional water resistivity monitor interface raw data e monitor channel has a positive and a negative voltage reading. These readings are t are of opposite polarity.

t the control system is calibrated for is shown. For example: R22

top, far right-hand side of this display represent the internally computed maximum and a counter ranging from 0 to 99, which are used to adjust the valve drives and mperature.

right side of this display indicates the status of the lithium battery, mounted on the sed to run the system's elapsed run-time clock depicted in Test Panel 8 and the

cted in Test Panel 9. A "Bat. OK" message indicates that the battery is operational,

13



while a "No Bat." message indicates that the battery is dead and should be replaced. TEST PANEL #8: Alarms: Fill Tank !

KEY Run 356d 11:31:25

The top left side of this display shows the alarm (error message) history. If there have been no alarms since the last history reset, the display reads "No Alarms". If alarms have occurred, the display shows them in sequence, like the main display. The history can be cleared 3 ways:

1. Power Off/On 2. Press START Key when unit is stopped 3. Press 0 Key when viewing Test Panel 8

The second line of the display can be read when the chiller is stopped. It indicates the reason that the chiller was last stopped: KEY, FATAL, RS232 or EXT. The right side of the second line indicates the elapsed run time on the system in days (from 0 to 9999), hours, minutes and seconds. This system is equipped with a battery which, if operational, saves the elapsed run time value when the system is stopped and restarted.

TEST PANEL #9:

T- 0:0: 0 14.95 15.0 No Alarms..... Tank 1 4Ev 0By 37Cd 13Sh 14SA Gpm

This display provides run/event recorder data. The run/event recorder continuously records important information into a non-volatile memory while the system is operating. Data is stored at one-second intervals for the last 120 seconds of run time and it is also stored at two-minute intervals for the last 240 minutes of run time.

The first line of this display indicates the run time in hours, minutes and seconds prior to the last system shutdown, the output and setpoint temperatures of whichever recirculating channel was last selected at the Main Display and the system-wide alarm history. The second line indicates the evaporator, bypass, condenser, and superheat temperatures in °C, and the flow rate in GPM. All refrigerant circuit RTD temperatures are truncated to the nearest 1°C for this display.

After the system is stopped and Test Panel 9 is selected, the memory is displayed at the last or most recent second (T- 0: 0: 0). The downward arrow key can be used to decrement time into the past. There are 120 "1-second slots" and 120 "2-minute slots". If the downward arrow key is held down, the time slots decrement at the rate of two slots per second. The upward arrow key increments to more recent time slots. If the "Z" key is depressed, the display goes to the oldest 1-second slot (T- 0: 1:59 if the actual run time was of at least that duration). If the "9" key is depressed while viewing Test Panel 9, the display reverts back to "T- 0: 0: 0", the stop time.

The alarm messages are accurate for the slot that is current. If the display is on the minutes slot, then the alarms indicated are any which have occurred during that 2-minute interval. Alarm messages cycle or flash in an identical fashion to those appearing in either the Main Display or in Test Panel 8.




SERVICE & WARRANTY If a unit malfunctions, please contact the Mydax Service Department as soon as possible. Many small problems can lead to large problems if not dealt with immediately. Please have the serial number and model number on hand when calling. Mydax Service Department: (530) 888-6662 FAX: (530) 888-0962

Email: [email protected] RETURN OF UNIT FOR SERVICE

Many problems may be repaired by field exchanges of a module, pump, controller, etc. If return is required, please obtain a return authorization number from the Mydax Service Department or the unit may not be accepted at our receiving dock.

Please refer to the shipping instructions which follow.

SERVICE OF REFRIGERATION UNIT

Nearly all repairs to the refrigeration unit involve brazing or silver soldering. This should only be done by a person trained in refrigeration service and familiar with the Mydax system.

NOTE: Before servicing any refrigeration unit involving brazing, remove all refrigerant from the system.

Evacuate to a 400 micron vacuum to remove refrigerant residues, then open all service valves to dry air or dry nitrogen before use of a torch.

In particular, service of Mydax refrigeration circuits requires attention to the following:

1) Use caution to protect components from heat damage. 2) Prevent any moisture from entering the circuit, as Mydax proportional valves do not function with moisture

present. Once moisture has entered the system it cannot be removed. 3) Remove insulation and instrumentation wiring or use heat shields to protect them from torch heat during

work. 4) Before recharging the circuit, evacuate it to 200 microns at a minimum room temperature of 75°F for three

hours, or longer for units with 4 horsepower or larger compressors.



12 MONTH WARRANTY AGREEMENT Mydax, Inc. warrants that its temperature control system, and the component parts thereof, will be free from defects in workmanship and materials for a period of 12 months from the date of shipment. All costs for parts and labor are covered for the term of this contract. In the event that warranty service is required, the customer must contact Mydax Customer Service at the number listed below. The Mydax chiller is controlled with a microprocessor which continually records a history of the operation status of key components. It is important that troubleshooting begins by analyzing these diagnostics. Call tracking is provided once diagnostics are performed and service personnel are dispatched. To expedite service, Mydax reserves the right to refer service to a qualified local service organization trained in the service of Mydax chillers. Diagnostics will be provided by any one or more of the following means: • Phone consultation, for thorough diagnostics and resolution of problem. • Referral to Mydax web-site-based troubleshooting guide. • On-site service by Mydax service personnel or qualified service organization. Mydax offers an extended service contract; please call at least 3 months prior to the expiration of this warranty for details. Customer Name: Lawrence Berkeley Laboratory

Unit Model Number: 1M9W-T Warranty Start Date: See shipping invoice

Unit Serial Number: 120- Warranty expires 12 months from above date.

MYDAX CUSTOMER SERVICE

CONTACT INFORMATION: Phone: 530-888-6662 Address: 12260 Shale Ridge Lane Fax: 530-888-0962 Auburn, CA 95602 [email protected] www.mydax.com



RESHIPPING & LONG-TERM STORAGE PREPARATION Reshipped systems should be protected from freezing temperatures in shipment or during long-term storage, or serious damage may result. Freezing temperatures can be encountered in air and over-mountain surface shipments in any month of the year. In-transit freeze-up can occur in the recirculating coolant loop and in a water-cooled condenser's water circuit. To protect against freezing, all water must be removed from these circuits, or ethylene glycol must be added. This system has a water-cooled refrigeration condenser. The following instructions apply to shipment or long-term storage preparation: 1) Remove the condenser cooling lines and drain water from plumbing. While draining, remove the right side

panel of the chiller and open the condenser flow regulating solenoid bypass valve. This will ensure complete draining of the condenser plumbing. Once water is completely drained, close valve and replace panel.

2) As much coolant as possible should be drained from the system before shipment. Coolant adds significant

shipping weight and may damage electrical parts if it sloshes out of the tank. 3) Plug the TANK IN, TANK OUT, FILL, VENT and DRAIN fittings to avoid leakage of any residual

coolant during shipment or storage. Also plug the CONDENSER IN and CONDENSER OUT fittings. FAILURE TO PERFORM THESE STEPS PRIOR TO SHIPMENT MAY VOID THE WARRANTY. Call Mydax for shipment preparation help, if needed, at (530) 888-6662

Mydax, Inc.

Appendix A RS-232 Page A-1

-Appendix A -RS-232 Serial Interface Operation

RS-232C INTERFACING

The use of an embedded microprocessor allows Mydax to offer an RS-232C (remote)interfacing capability. Mydax systems can be controlled from a computer with either theMYDAX REMOTE Window's ™ software package or any control software of the user's choice. Full control and monitoring is possible, allowing complete system operation from anyconvenient location.

Cable connection is via a rear panel DB-25S connector. Connector pin-out is as follows:

Pin 1 ShieldPin 2 Transmit DataPin 3 Receive DataPin 7 Common

A typical interconnect cable for an IBM-PC COM port should be wired as follows:

IBM-PC MYDAX

Female Connector DB-25P Male Connector

DB-9P DB-25P•

5 1 1

3 2 2

2 3 3

7 4 • 4

8 5 • 5

6 6 • 6

5 7 7

4 20 • 20

Mydax, Inc.


RS-232C COMMANDS

The following ASCII commands can be transmitted to the system MPU via the RS-232C link:

RO Enables RS-232C control.

RF Disables RS-232C control. With remote disabled, system onlyresponds to RO.

GO Starts the compressor and pump.HA Stops the compressor and pump.

RP Run Pump only, active only on selected systems.

S?xy.z Sets fluid temperature (x, y and z are any numbers) of tank A,B or C. Settings outside the range default to the nearest limit. Entering a decimal point is optional, as the last digit is assumed to bethe tenths digit. For example: "SA180" selects +18.0°C for tank A,"SA245", "SA24.5" & "SA+24.5" all select +24.5°C for tank A,"SA93.2" selects +30.0°C for tank A.

TE1 Sends a transmission of abbreviated status including system on/offstatus, actual tank temperature and the set point temperature.

TE2 Causes transmission of flow and resistance, if the options exist. Forexample:

TE3 Transmits the contents of the 2 by 40-character main display over theRS-232 line.

TE4 Same output as TE1 plus RTD temperatures and valve & heater drivesignals.

TR or TR0 Turns off repeat transmission mode.

TRx Enables automatic periodic repeat transmission (x= 1-60 andrepresents the number of seconds between transmissions). Theinstructions which follow the TRx command are repeated at thetransmission rate that was set by the TRx command. TE1, TE2, TE3and TE4 are commands that can be repeated in all or anycombination.

TPx Changes the 2 by 40-character display at the main control panel toTest Panel "x" "0" = normal main display; "1" - "8" = diagnosticdisplays. See section on DIAGNOSTIC DISPLAYS. Does NOT causetransmission of the display over the RS-232C line (see command TE3)

ID Causes transmission of the model number and software revision date. For example:

"ID: 1VLH14W 1-24-2000"

Mydax, Inc.


AL Causes transmission of the alarm status. For example:

"ALARM: 0" denotes no alarm condition.

AH Causes transmission of the alarm history status. For example:"ALHIS: 13" denotes one alarm.

This history is the same as the Test 8 display. The history representsall alarms that have occurred since the last "Start" command.

CH Clears alarm history. This can also be cleared with the "Start" key orwith the "0" key when viewing Test Panel 8.

A delimiter between command strings can be a carriage return (CR), a semi-colon (;) or a comma (,). If a command is understood, a (>) is returned foracknowledgment. If a command is not understood or ignored then a (?) isreturned.

RS-232C STATUS MESSAGES

TE1 status messages include the following:

ON 19.95 20.0 (CR)(LF) A B C

Key: A) System is ON or OFFB) Actual Tank Temperature in °CC) Set point Temperature in °C

A TE4 status message consists of TE1/TE3 data plus RTD temperatures and valve & heaterdrives:

ON 19.9 20 -63 -8 41.5 34.5 102 0 2 2 0 4 10 8 2 11 (CR)(LF) A B C D E F G H I J K L M N O P Q

An alarm status message is transmitted whenever there is an alarm that occurs for the firsttime and whenever the alarm status changes:

ALARM: 4 13 (CR)(LF) R S T

A halt indication is transmitted when the system is stopped for any reason:

STOP: KEY (CR)(LF) U V

Key: A) System is ON or OFF

B) Actual Tank Temperature in °C, as sensed by the Output RTD

Mydax, Inc.


C) Set point Temperature in °C

D) Calculated temperature in °C of the refrigerant line at the suction pressuretransducer

E) Pressure in PSIg of the refrigerant line at the suction pressure transducer

F & G) Temperature in °C in the refrigerant line at the Superheat and CondenserRTDs

H) Temperature in °C in the refrigerant line at the Discharge RTD (2-stage designonly)

I ) Temperature in °C in the refrigerant line at the Subcooler RTD (inactive)

J & K) Valve drives of evaporator valves 1 and 2; valve 2 is inactive in singlechannel systems (See "DIAGNOSTIC DISPLAYS, Test Panel 1" for explanation of drivesignals.)

L, M & N) Bypass, Superheat, and Desuperheat valve drives. Desuperheat is notavailable in all designs.

O & P) Heater drive signals; Heater 2 is inactive in single channel systems (See"DIAGNOSTIC DISPLAYS, Test Panel 1" for explanation of drive signals.)

Q) Flow rate in gallons-per-minute(GPM) of recirculation fluid. On systems without aflow meter, this number has no meaning.

R) Any active alarms, by code # (See the next section for a description of alarmcodes.)

S & T) Actual code # for the alarm

U) Stop is displayed whenever the system is halted

V) Indicates the origin of the Stop Command (status message "S") whether it isfrom the system front panel (KEY), the external stop line (EXT.), an RS-232Ccommand (RS232) or it originated from a fatal alarm (FATAL).

Mydax, Inc.


RS-232C ALARM CODES

The following alarm codes may be transmitted in an AL or AH status message. Not all ofthese codes are possible in every system:

1 CONDENSER HOT: The reading from the condenser RTD indicates atemperature in excess of +50°C. The system microprocessor incrementallyreduces the evaporator valve drive to reduce the flow of refrigerant into theevaporator. This effectively reduces the heat-rejecting capacity of thesystem, which keeps the temperature in the condenser at acceptable levels.

2 LOW FREON: Indicates pressure of refrigerant is low. Have unit serviced byMydax or a qualified service center.

3 RTD OPEN: Indicates that one of the system RTD's has failed and thesystem has shut down to protect itself. The main display shows which RTD isfaulty by giving its pin number location on the M1002 or M1005 circuit board.

4 PUSH RESET: The interlock loop has been broken and the reset switch mustbe depressed to re-establish it.

5 FILL TANK #1: The tank 1 low level sensor has tripped. If coolant is notadded "soon", the "empty" sensor trips and the system shuts down.

6 Inactive in this system.

7 FILL TANK #2: The tank 2 low level sensor has tripped. If coolant is notadded "soon", the "empty" sensor trips and the system shuts down.

8 LOW FLOW: Indicates that a low flow condition exists in one of therecirculating channels.

9 Inactive.

10 PHASE MISSING: Indicates one or two of the three electrical power phasesis missing. Inactive on single-phase units.

11 PHASE REVERSED: Indicates incorrect electrical power phase relationship. May be corrected by reversing any 2 phases. Inactive on single-phase units.

12 Inactive in this system.

13 LOW AC LINE: Indicates a low voltage condition exists on the input AC line.

14 RESISTANCE LOW: Indicates that the deionized water resistivity hasdropped below the programmed limit.

15 TANKx TOO HOT / EXTREME TEMP: Indicates that the tank temperature iseither more than +10.0°C above its upper maximum set point, or too close tofreezing and that the system has shut down.

1M9W-T Parts ListReference P/N Title DetailFB1 03-2200-10873 Fuse Block, Class CC 3 Pole, 30AF1, F2, F3 03-2200-10874 Fuse, 13/32" x 1-1/2", Class CC 10A 600V Fast BlowLM1 03-4102-01220 SSAC Line Monitor 3PH, DPST, 200-480VCB1 03-4123-00604 Circuit Breaker, 3 Pole 20 AMP, 240 VCB2 03-4123-00725 Circuit Breaker, 3 Pole, Supplimentary

Protector2 AMP, 480 Y/277 V, D-Curve

CON1 03-4137-00816 Contactor, DP 20A, 3 Pole, 24V CoilS1 03-4140-00874 Switch, Pushbutton, TW Series, 22mm N.C. Momentary Contact, Red Mushroom

S6 03-4140-00884 Switch, Pushbutton, TW Series, 22mm N.O. Momentary Contact, B, R, G

S5, S7 03-4140-03220 Switch, Float PolypropyleneS4 03-4140-04120 Switch, Over Temp. 120°F, .187 Quick

03-4157-00940 Plug,Twist-Lock L21-30P, 30A, 3Ph, 120/208V, 281103-4171-00609 Connector CPC Cable Clamp Size 11 .500"03-4171-00625 Connector CPC Plug 4 Pin Size 1103-4171-00628 Connector CPC Receptacle 4 Pin Size 11 Free Hanging

RL1 03-4175-01040 Relay, Clear, Socket Mount 4PDT, 24VAC

RL1-S 03-4175-01041 Relay Socket 14 Pin Double TierSSR1 03-4175-01064 Relay SS 120V, 2.5A SSR2, SSR3, SSR4 03-4175-01082 Relay SS 240V, 40A LM1-S 03-4177-01136 Relay Socket 8 Pin Octal, 600V

03-4180-01148 Connector, Adapter, RS-232 DB25S to RJ45

RT3, RT4, RT10 03-4186-01175 RTD Thermalogic Platinum 100 ohm 0.1%(±0.25°C), 1/8" x 2"T1 03-4197-01424 Transformer, Control Power 208V, 24VAC, 100VA VFD1 03-4198-00015 VFD 1 Hp, 240 V, 3 PhPI1 07-0800-09060 Pressure Gauge, Liquid Filled 160 PSI 1/4"NPT CBM 2-1/2"DiaFL1-E 07-0810-09120 Filter 10 Micron 10"

FL1 07-0810-09140 Filter Housing Blue 10" x 3/4"FPTHT1, HT2, HT3 07-0825-09206 Heater 1000W 240V V8 07-0879-09226 Valve, Ball, Brass 1/4"FPT, Wedge HandleP1 08-0090-01117 Pump, Vane 1HP, 3 PH C1 10-1100-11900 Compressor, Hermetic 1.5HP, 230V 3Ph

HT4 10-1100-11903 Crankcase Heater PTC ManeuropFL2 10-1102-12037 Filter Dryer, 2 Ton, Liquid 3/8"Soc, 5.88"x 3.00"dia

10-1111-12035 Switch, Pressure NC, 375 PSI, Open on RiseS3 10-1111-12045 Switch, Pressure 10-150 PSI, SPDTHE2 10-1114-10580 Heat Exchanger, Condenser 1-1/2 Ton

HE1 10-1114-10581 Heat Exchanger, Evaporator 1-1/2 TonHE3 10-1114-10582 Heat Exchanger, Subcooler 3/8HpPT1 10-1117-12110 Pressure Transducer mV Output, 300PSIA, 1/8-27 NPT, 2' CableTK2 10-1119-12012 Receiver REFRID RSRCH 1911LG1 10-1121-12211 Sight Glass 3/8" ODF Solder

EV1 10-1142-14014 Valve, Expansion AKV10-5EV1-C 10-1142-14038 Valve Coil 24V, 14W, w/Junction BoxV7 10-1144-12200 Valve, Water Flow Cntrl, 3/8" V46AA-1

13-1455-15010 Caster, 3-1/2" Locking Swivel Roll Master Wheel, Zinc Rig, Ball Bearing, w/BrakePCB1 89-1001-00010 1001 Controller Board X5

PCB2 89-1002-00020 M1002C RTD Board Tested/Saturation Mod. on RTD7PCB4 89-1004-00001 1004 Power Supply V-Fan AddedPCB3 89-1007-00000 1007 LCD Supply StandardPCB5 89-1010-00022 1010 Interface Board PSIG/PSIA-Low gain/Relay

3/8/2006 1M9W-T Parts List for Manual.xls Page 1

sheet 1 of 1 DWG. D3020 1M9W-S LBL Frame

Mydax Inc. Auburn, CA.

LBL 1M9W-T Frame

March 8, 2006

Side View Front View

32"

55"

24.0"

Scre

en

Powerbox

Fron

t

Top View

160EMO

sheet 1 of 1 DWG. D3021

Mydax, Inc. Auburn, CA

1M9W-T Chiller Fluid Schematic

March 9, 2006Water Cooled

HighPressureSwitch

FilterDrier

Condenser

Water Flow Control Valve

Capillary Tubes

Drain

Condenser RTD

CondenserCooling Water

1.5 Gpm @ 75°F, P = 20 Psi

Evaporator

R-2

2C

ompr

esso

rW

ith S

uctio

nAc

cum

ulat

or

10 M

icro

nPa

rticu

late

Filt

er

Pressure Gauge160 PSI

Coolant Supply

+15°C to +25°C

4 to 10 Gpm @ up to 100 Psi

Coolant Return

HeatExchanger

Evaporator Valve

Sight Glass

Ref

riger

ant L

iqui

d

Tank RTD

TankHeaters

Level Switches

TankBaffle

20 GallonPolypropylene

Reservoir

1 HPVane Pump

Output RTD

* Refrigerant control valves are set continuously by the system microprocessor.

* All RTD's are read continuously by the system microprocessor.

#4,742,689#4,918,931#4,934,155

This circuit is coveredby one or more of thefollowing U.S. Patents:

Rec

eive

r

LinearPressureSensor

PSIA

1/2"

1" FNPT

1/2"

1 HP VFD

Bypa

ss F

low

PressureSwitch

1" FNPT

3/4" MNPTFill Port

1/2" FNPTDrain

Set to 115 psiSet speed on TP#5VFD located on left side of chiller.

VFD1P1

EV1

S7

S5

TK1

HT1

HT2

HT3

HE1

HE2

HE3

RT10

FL1

S3

RT4

PI1

PT1

C1

RT3

TK2

FL2

LG1

V7 V8

1 HPVane Pump

Belden VFD Cable

RLA=4.8 amps

VFD Parametersall default except:

P034=30.0P035=60.0

P036=2P038=2

P039=1.0P040=1.0A084=7

A110=30.0

P033 is Motor OL Current = 4.8A

Gnd

"Vfan2x"

Allen BradleyPowerflex1HP Drive

L1

L2

L3

13 (0-10V)14 (Common)

VFD1

11 +24VDC2 STOP-RUN FWD

T1T2T3

1 STOP

R2R1

(Status Relay N.O.)

[A055]

CB22 Amp Type D

SSACLineMonitorPLMU11

543

128

Set to: Line VAC, 4% Unbal, 5 sec delay

Type CCCooper-Bussmann

KTK-R-10

10 Amp: F1,2,3

L1

L2

L3

121411Relay

Gnd

Power20A #14 AWG

24VAC / Interlock Loop isRed #18AWGRefrig valves are wired in Yellow

High Voltage Wiring Chart: (All HV wire is Black)

Low-Voltage Wiring Chart:

DC / Logic wiring is Blue #18 AWG

Power

Evaporator

Reset

2 11

RL1,C

RL1A

B

Refrigerant HighPressure Switch

CON1T1

T2

T3

Keyboard

J1

5656

5050

23 Reset

M1004 Power Supply,& Output Drivers

50 +5V20 Comp

EV1

3+

4

2

1

SSR1

M10

02 In

puts

& R

TD's

LCD Display

10

6RL1,B

J2

J1

J3

RS-232Connector

J2

M1001 Controller

Power

24 VACOut

Gnd In

Gnd

24 V

AC10

0 VA

CON1

20 Amp

D1202

9

5RL1,A

L3L2L1

Compressor

Crankcase Heater

53

TankEmpty

FillTank

22 Tank1 Lo

+5V 49HTR1 23

sheet 1 of 1DWG. D3022

Mydax, Inc. Auburn, CA

1M9W-T Chiller Electrical Diagram

March 8, 2006

D244023+ 10

00W

SSR4

14

23+ 1000

W

D2440

D2440

SSR2

SSR3

1

1

2

4

3+

4

Tank Heaters

1000

W

208/230 VAC, 3 phase

Grn

TankRT10

Con

d.O

utpu

t

RT3

RT4

RT7

Trim

_01

RTD's

1

2

M1007LED PS

M1010 InterfaceLinear

PressureSensor

4567

J4 J4

Gnd

Pump HighPressure Switch

51

52

Pump 21

V Fan 2x 41Gnd 40

8

12RL1

,D

Out

6A Fuse24 VAC(fused 6A)

54

EMO

Over Temp

13' of 12/4 Cable with L-21-30 Plug

55

AC Fault21

P1

LM1

FB1

CB1

C1

HT4

HT1

HT2

HT3

T1

S1

S2

S3

S4

S5

S6

S7

PCB2

PCB1

PCB4

PCB3

PCB5

PT1

sheet 1 of 6 DWG. B2240


Mydax Controller M1001

'CPU'

D0

D1

D3

D2

D6

D7

D5

D4

A14

A13

+5V

2627 28 1 28 26

A0

A1

A8

A4

A11

A12

A10

A9

A7

A6

A5

A3

A2

CE OE

A15 WRN

U22 U16

27C256

EPROM

6264

Read/Write Memory

20 22 14 20 22 27 14

11

12

13

15

16

17

18

19

10

9

8

7

6

5

4

3

25

24

21

23

2

D4

D5

D7

D6

D2

D3

D1

D0

A0

A1

+5v

1

2

3

4

5

6

7

8

11

9

14

15

16

18

20 19 24

22 23 21 14

RDN

WRN

8254AN

U17

82C54

CounterTimer

100 Hz

200 KHz

Baud Clock

10

13

17

A12

A13

A14

MREQN

A15

U14

8251N

KEYN

Nov 10, 1997

0.1uf

+5V

ResetN

In4

ResetN

+5V

U21

Max690

8

7

6

54

3

2

1

2

3

41

1kWaitNJ7

R110k

0.1uf8.0MHz

D0

D1

D3

D2

D6

D7

D5

D4

26

27

20

19

22

21

14

15

12

8

7

9

10

29

17

16

13

30

31

32

33

34

35

36

37

38

39

40

1

2

3

4

51125

6

24 "CPU"

Z84C0008

U9

M1N

IOREQN

MREQN

WRN

RDN

A0

A1

A3

A2

A6

A7

A5

A4

A8

A9

A11

A10

A14

A15

A13

A12

+5V

8.0 MhzOsc. U15

+5V

NMIJ7

IntJ7

10K

10K

1K

1K

U7 U12

1

2

13

12

3 4

8255N

8254BN

CPr

Q11

10

12

13

Qn 8ClD

U8

9

+5V

RTC

In3

CPr

Q3

4

2

1

QnClD

U8

5

U77

45

3RxRdy

TxRdy fromsheet 2

4 MHzto sheet 2

Bat.

LithiumBattery

U449

10

8

74

HC

13

8

A

B

C

1

2

3

456

15

14

13

12

11

10

9

7

sheet 2 of 6 DWG. B2240-2



IOREQN

A7

RDNWRN

U13

U12

A0

A1

A2

A2

A3

A4

IN 1

IN 0

IN 2

IN 3

IN 7

IN 6

IN 4

IN 5

OUT 8

OUT 4

OUT 0

OUT 12

OUT 16

OUT 20

13 12

D1

D0

D2

D3

D7

D6

D4

D5

+5V

SeikoL4042

LCDDISPLAYMODULE

124

5

6

14

13

12

11

10

9

8

7

10K 10K10K10K10K 10K

A0

A1

A2

+5V

KEYNU42

5 ea.1N914

10K10K10K10K 10K 10K

KEYN

SIP

D7D6D0 D5D1D0 D2 D3

74HC240

U41

KEY MATRIX(26 Keys)

11 8 13 6 15 4 17 21

19

9 12 7 14 5 16 3 18

D2

D3

D4

D5

D6

U10

82C51A

A0

PCLR

RDN

WRN

BAUDCLOCK

8251N

4.0MHz

+5V

26 4

12

21

13

10

8

7

6

5

2

1

28

27

925

11 20

Rd

CTS

Td

RTS

U4MAX232

15

14

3

17

19

23

12

9

11

10 7

14

8

13

RS-232Interface

0.1uf

0.1uf

Jan. 15, 1996

U31Out 24

Out 28

RTC

SIP

+5VVLC

3

10K

LCD R/W

LCD RS

LCD EN

37

38

39

40

1

2

3

4

U11

8255

"A"Section

D7 27

28D6

D5 29

30D4

D3 31

32D2

D1 33

34D0

5 36

RDN

WRN

8255N

6 7

35 26

ResetN

TxRdy

RxRdy

+5V+

+

+

+

+

10

10

10

10

10

6

2

16

1

3

4

5

15

J3

11

12

13

14

15

654

3

2

1

C

B

A

74

HC

13

8

to sheet 1

74

HC

13

8

A

B

C

1

2

3

456

15

14

13

12

11

10

9

7

74

HC

13

8

A

B

C

1

2

3

456

15

14

13

12

11

10

9

7




Input-Output

11

12

13

17

16

15

14

D0

D1

D2

D3

D4

D5

D6

D7

IN 5

U3

74

HC

24

4

18

3

16

5

14

7

12

9

191

11

8

13

6

15

4

17

2

T2 Low

Interlock

T1 Low

Reset Rly

Freon Lo

Ext Stop

Ext Start

J1-17

J1-18

J1-15

J1-13

J1-14

J1-11

J1-14

J1-16

J1-6

J1-5

J2-4

J2-3

J1-8

J1-7

J1-10

J1-9

T3 Low

Miss Ph.

Rev Ph.

Key Sw.

RemoteDig/Ana

24

23

22

21

20

19

18

2

17

4

15

6

13

8

11

1 19

9

12

7

14

5

16

3

18

74

HC

24

4

U1

10k

+5V

IN 7

D7

D6

D5

D4

D3

D2

D1

D0

2

17

4

15

6

13

8

11

1 19

9

12

7

14

5

16

3

18

74

HC

24

4

U2

10k

+5V

IN 6

D7

D6

D5

D4

D3

D2

D1

D0

Res On/Off

On=Remote

On=extvirtual

On=VoltSet En.

On=noFudge

Baud

Dip Switch

PCLRN

74

HC

27

3

U18

9

6

5

2111

3

4

7

8D3

D2

D1

D0

Out 28

April 24, 1996

Switch 2

Switch 3

+5V

10k

100K

+5V

10k

100k25 10

100k

10k

+5V

U1182C55 "B

U1182C55 "C

D4

D5

13

14 15

12

16

1918

17

D7

D6

LCD R/W

LCD EN

LCD RS

EV1J2-20

EV2J2-19

EV3J2-18

EV4J2-17

EV5J2-15

U24ULN2003A

+5V9

8

1

2

3

4

5

6

7 10

11

12

13

14




Output Dec 20, 1995

U197

4H

C2

73

19

16

15

12

9

6

5

2

111

3

4

7

8

13

14

17

18

PCLRN

Out 8

D0

D1

D2

D3

D4

D5

D6

D7

ULN2003A

9

16

15

14

13

12

11

810

7

6

5

4

3

2

1

U16

+5V

Beep

220

220

220

220

+5V

Compr.J2-13

PumpJ2-16

"Alarm"J2-14

LED

LED

LED

J8-1

J8-2

J8-6

"Power"

D7

D6

D5

D4

D3

D2

D1

D0

U32

74

HC

27

3

19

16

15

12

9

6

5

2

111

3

4

7

8

13

14

17

18

U28

74

HC

27

3

19

16

15

12

9

6

5

2

111

3

4

7

8

13

14

17

18

Out 4+5V +5V

DVB

DVA

High R J4-4

POS R J4-3

DIB J4-6

DIA J4-5

LED

+5V

+15V

Run DVM

DVC

1K

1K

1K

1K

DVMRDY

+5V+5VOut 0

14

13

11

6

4

3

9 1

2

5

7

10

12

15

74

HC

17

4

U5

14

13

11

6

4

3

9 1

2

5

7

10

12

15

74

HC

17

4

U6

D5

D4

D3

D2

D1

D0

1K

1K

1K

1KRA J1-3

RB J1-4

RC J1-1

RD J1-218

17

14

13

8

7

4

3

11 1

2

5

6

9

12

15

16

19

74

HC

27

3

U20

PCLRN

Out 12

D0

D1

D2

D3

D4

D5

D6

D7 SpareJ2-6

FAN 3J2-5

FAN 2J2-8

FAN 1J2-7

HTR 3J2-10

HTR 2J2-9

HTR 1J2-12

U26 ULN2003A

9

16

15

14

13

12

11

810

7

6

5

4

3

2

1

+5V

sheet 5 of 6 DWG. B2240-5B



Analog March 20, 2000

U38

4

5

6

7

12

11

10

9

8

14 13 3

1

16

15

2

10.0K*

10.0K*

RTD OutJ1-24

Set 1J4-16

Set 2J4-15

AC Det.J2-1

T1 Ext.J4-14

T2 Ext.J4-12

T3 Ext.J4-13

U35

DG

50

8C

J

-15V

DVA

DVB

DVC

+5V

D0

D5

D4

D3

D2

D1

D0

D7

D6

D5

D4

D3

D2

D1

+5V

IN 0

IN1

1

20

19

18

17

16

15

14

13

12

11

10

9

40

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

8

7

6

5

4

3

2

+5V

Run DVM

-15V U4379L05

-5V

1 uf+0.1uf

200K*

0.1uf

.056uf

200kHz

+1uf

200K*

.0047uf

47�

+5V

1uf+

DVMRDYU27

1 2

U36

ICL7109

74HC14

+15V

3

2

8

1

7

6

5

U38

TL032CP

+10.24V

-10.24V

10

.0k

0.1

%

10.0K 0.1%

20.0K*

10

.0K

*

D0

14

13

D1

D2

12

11

D3

D4

10

9D

5

D6

8 7D

7

U40U39

AD7528KN

U40

+5V

A0

Out 16

17

6

16

15

5 4 18

Ref A Ref B

12

3

76

5

32

19

20

1

TL032CP

Gain DacJ1-230 to -5.1V

VFanJ2-20 to +10.0V

DI AmpJ4-11

40.2K 0.1%

10.0K 0.1%

10.0K 0.1%

40.2K 0.1%

10.0K 0.1%

30.1K 0.1%

10.0K 0.1%

10.0K 0.1%

10K*

10.0K 0.1%

10.0K 0.1%

10.0K 0.1%30.1K 0.1%

30.1K 0.1%

+15V

+5.12VJ4-8

Test Point Aadjust to +1.024V

Note:1. Resistors with *are 1/4W 1% metal film

2

Ref-02CP U37

6

54

"Adj"

20

.0K

0.1

%

10

.0K

0.1

%

10

.0K

0.1

%

10

K

10.0K 0.1%

10.0K 0.1%

10.0K 0.1%

20.0K 0.1%20.0K 0.1%10.0K 0.1%

RTD X5




Optional Jan. 15, 1996

10

K

10

K

10

K

10

K

10

K

+5V

2K

2K

2K

2K

2K1K

1K

Ctr1J5

Ctr0J5

+5V

0.1uf

13

10

CounterTimer

82C54

U23

8254BN

WRN

RDN

14212322

241920

18

16

15

14

9

11

8

7

6

5

4

3

2

1

A1

A0

D4

D5

D7

D6

D2

D3

D1

D0

FlwSw3J5

FlwSw2J5

FlwSw1J5

200KHz

U30U30

(optional)

Tank1J4-9

TL032CP

10.0K 0.1%

20.0K 0.1%

20.0K0.1%

0.1uf0.1uf

+15V-15V

84 5

67

3

21

16

1

2

3456711101289

13

1415

A1

+5V

++

+10.24V

+5.12V PinJumpers

EDCBA

Out20

AD7542KN

U29

D3

D2

D1

D0

A0

A0

D0

D1

D2

D3

U33

AD7542KN

Out24

A B C D E

PinJumpers

+5.12V

+10.24V

+ +

+5V

A1

1514

13

98 12 10 11 7 6 5 4 3

2

1

16

12

3

76

54 8

-15V +15V

0.1uf 0.1uf

20.0K0.1%

20.0K 0.1%

10.0K 0.1%

TL032CP

Tank2J4-7

(optional)

U34 U34

Range A B C D E

+5.12V on - - on -

+10.24V - on - on -

+-5.12V on - on - on

+-10.24V - on on - on

PinJumpers



RTD and Inputs M1002

Dec 28, 1995

100�

100�

100�

100�

100�

100�

100�

RT12

RT11

RT10

T3 Evap

T3 Out

T2 Evap

T2 Out

T1 Evap

T1 Out

Condr.

Sup Ht.

Bypass

100�

100�

Gain DACJ1-23

5VRTD

120� 0.1%

100� 0.1%

100K*

1.27K 0.1%

100�+

10K 0.01uf

62

U1

-15V +15V

43 7

19 S1

S220

21 S3

S422

23 S5

S624

25 S7

S826

11 S9

S1010

9 S11

S128

7 S13

S146

5 S15

S164

A0 A1 A2

A3

17 16 15

14

14

151617

A3

A2A1A0

4 S16

S155

6 S14

S137

8 S12

S119

10 S10

S911

26 S8

S725

24 S6

S523

22 S4

S321

20 S2

S119

U5DG506A

U6DG506A

18

1

27+15V

+5V

-15V

28

28

-15V

+5V

+15V27

1

18

100K

100K

100K

100K

100K

100K

100K

100K

RA J1-3

RB J1-4

RC J1-1

RD J1-2

U3+

+U2

10K 0.001 uf

1.00K0.1%

9.09K 0.1%

76

5 4

672

3 4

LT1001

TL032

-15V

-15V

+15V

5.12VJ1-8 +

U2

+15V

5VRTD

10K

10K

12

3 8

LT1001

RTD's 0.1uf

+

Bridge

24VAC

24VAC

Ext 4

Stop

Start

Com.

+

U8

U8

U7

PS2501-2

PS2501-2

toAna. En. -28-

toStop-26-

toStart-27-

2K

2K

2K

10K

47uf

1N914

6

54

3

8

7

1

2

1

2

4

3

7

58

6

LT1001

RTD OutJ1-240.001

uf2

34

7

6

+15V

U4+

-15V

12.1K 0.1%

10.0K 0.1%

A

B

C

1. Resistor with *are 1/4W 1% metal film

PS2501-2

40.2K 0.1%

50.0k 0.1%

100k 0.1%

"Gain"

"Zero"

0.1uf

0.1uf

0.1uf

0.1uf

0.1uf

0.1uf

0.1uf

0.1uf

0.1uf

0.1uf

0.1uf

U3+



Power Supply M1004

24 VAC

GND

47

vo

ltV

ari

ste

r

V

1N4002

4700uf 50V

June 19, 1996

Fuse

In

Out

Out

Out

Out

Out

511*4

76

5 30

.1K

0.1

%1

0.0

K 0

.1%

1.0

K*

750*

U4+

0.1 10uf+

+15V100mA

U2LM317T

+U4

9.76K*

1.0K*

1.0

K*

10

.0K

0.1

%1

0.0

K 0

.1%

3

21511*

1�

0.1

U3LM317T

+

1�5.1� 2W

2.0K*

++5V200mA

10uf

10uf

-15V100mA

+

20 1W 1�

+

U1LM337T

0.11000uf 50V 500�

2.49K*

249*

Q2

00

4L

3

220 6

4

2

1 47�

1K 1�EV1

Q1MOC3032

U6EV1J2-20

EV2J2-19

U7MOC3032

Q2

EV2 1�1K

47�1

2

4

6220

Q2

00

4L

3Q

20

04

L3

220 6

4

2

1 47�

1K 1�EV3

Q3MOC3032

U8EV3J2-18

EV4J2-17

U9MOC3032

Q4

EV4 1�1K

47�1

2

4

6220

Q2

00

4L

3Q

20

04

L3

220 6

4

2

1 47�

1K 1�EV5

Q5MOC3032

U10EV5J2-15

Freon Control Valves

1N4002

ACDetJ2-1

+

+U5

U5

1

2

3

76

5

1uf

1N914

200K*

200K*4.02K*

511*10M

LM358A

PowerConnectors

TL032

8

4

+15V

-15VU18

AL

Run

43 +

45 +

42 -

44 -

1K

1K

PS2501-2

6

5

8

7

1

2

3

4

10K

Q8

2N222210K

10K

2N2222

Q7

10K

+5V

20 Comp.

21 Pump

22 Alarm

23 Htr1

24 Htr2

25 Htr3

26 Fan1

27 Fan2

28 Fan3

29 BeepJ2-1110K

10KJ2-5

J2-810K

10KJ2-7

J2-1010K

10KJ2-9

J2-1210K

10KJ2-14

J2-1610K

10KJ2-13

+5V

50 +5V

49 +5V

48 +5V

47 +5V

46 +5V

41 VFAN

+5V

J2-2

0.1uf



Phase Detector M1004

April2 4, 1996

Note:1. Resistors marked with � are1% 1/4W, all other resistors are 5% 1/4W.

4

4

8

-15V

+15V

4

8

84

+15V

Loop40

Gnd39

0.1uf

1M�

2

Jumpers

"VAC"220210200190180

1N914 0.1uf

1.5

8K

*

1.5

0K

*

1.4

3K

*

1.3

3K

*

1.2

7K

*

0.1uf

U11+

6

5

7

7

5

6

+U14

0.001uf

+5V

1.00M�

1.00M� 1.00M�

0.001uf

1.00M�

1.00M�

0.001uf0.001uf

1.00M�1.00M�

1.00M�

1.00M�

1.00M� 1.00M�

0.001uf 0.001uf

1.00M�

470K

470K�

74HC14

+5V

8

InterlockLoop

RelayQ1BS170

1N

40

02

1K

+5V

"OK"

GreenLED

121

13

U16

Miss Ph.J2-4

Rev Ph.J2-3

1.0uf

10M 896

54

3

U17U16

74HC27

11

10

98

U161K Red

LED

"REV."

+5V

RedLED

+5V

+5V

"UNBAL"

RedLED

1KU17U17

LM358A

LM358A

U17

1.0

M

1213

1N914

0.1

uf

2

1.0

M

0.1

uf

11N914

LM393A

LM393A

5

4.7K�

4.7K�

4.7K�

10

K

470K

1

10

K2

3+U14

U12+

5

6 10

K

+5V

7

1

470K

+5V

10

K

2

3+U12

65

4.7K�

3

2

U11+

1

U13+

10K*

10K*

7

6

5

3

2

1

10K*

10K*

+U13

10K*

10K*

74HC74

2 6

4

3

1

U15

Cl

Pr

Qn

Q

D

C

12

11

C

D

Q

Qn

Pr

Cl

U15

10

131K

"LOWAC"

11 10U17

"Scale"JumpersX2X1

8.6

6K

*

18

.7K

*

-15V

L1

L2

L3

Input Range190-480VAC

0.1uf

0.1uf



M1007 LED Power Supply

Sept 24, 1997

0.1

5.11 watt

1000uf50V

24 VAC

Common

Polyswitch

LM317T

1.0Positive

Negative

250 mA @4.1 voltto Display LED backlight

Heat Sinked

In Out

Ref

1N4002


M y d a x I n c . Auburn, CA.

Inter face M1010

Jan 25, 2000

15.0K 0.1%10.0K 0.1%

+U3

1

2

3 TL032

4

3

2

1

0.110K

Rt

Ct

10uf U1LM2907-8

Note:1. Resistors with *are 1/4W 1% metal f i lm.

2. For Proteus 500C-highCt=0.0047uf, Rt=69.8K*Rp=50K , 100Hz=0.714V

3. For Proteus 550CCt=0.01uf, Rt=49.9K*Rp=50K , 100Hz=0.97V

4. For Gems 1/2" Lo range, Rp= 20k, Rt=30.1k, Ct= 0.01uf100 Hz=0.595 V

Rp

8

7

6

5

1

2

3

Flow In

C o m m o n

Shield

+15V

To J4-14 T1 Ext

To J4-12 T2 Ext

8 9 10

Flow Gnd Press.

U2

+10 Ref.

+ Pres.

- Pres.

C o m m o n

1.02K *

21

8

3

4

5

6

7

-15 V

+15 V

7

45

6

INA114

Opt ional

0.10.1

-15 V

1 M

10K

Pressure Zero

10.0K 0.1%J4-11 DI Amp

J6

10.0K 0.1%15.0K 0.1%

+U3

6

5 TL032

Opt ional

7

4

8

Alarm

C o m m o n

Alarm NC

Alarm NO

Relay

11

12

13

14

200K 0.1%

Optional forGems F lowmeters

0.0047 100k

2k

J4-16 Set1

Us ing Sensym STImV300G1A sensor :0 psig= 1.125 vol t , 300 psig= 8.625 vol t

Us ing Sensym STImV300A1A sensor :0 psia= 1.125 vol t , 300 psia= 8.625 vol tSea level mean pressure= 14.7 psia = 1.4925 vol t

+5V

MSDS Number: 2008FR Page 1 of 7

Information in this format is provided as a service to ourcustomers and is intended only for their use. Others may use it

at their own discretion and risk.

The MSDS format adheres to U.S. standards and regulatoryrequirements and may not meet regulatory requirements in other

locations.

This information is based upon technical information DuPontbelieves to be reliable. It is subject to revision as additional

knowledge and experience are gained. Please return to thiswebsite for the most current version.

"FREON" 22

2008FR Revised 5-OCT-1996

CHEMICAL PRODUCT/COMPANY IDENTIFICATION Material Identification

Corporate MSDS Number : DU000025 Formula : CHClF2 Molecular Weight : 86.47 CAS Name : "FREON" 22

Tradenames and Synonyms

CHLORODIFLUOROMETHANE HCFC-22 CC0335

Company Identification

MANUFACTURER/DISTRIBUTOR DuPont 1007 Market Street Wilmington, DE 19898

PHONE NUMBERS Product Information : 1-800-441-9442 Transport Emergency : CHEMTREC: 1-800-424-9300 Medical Emergency : 1-800-441-3637

COMPOSITION/INFORMATION ON INGREDIENTS Components

Material CAS Number % *METHANE, CHLORODIFLUORO- (HCFC 22) 75-45-6 100

Rick Pugel

MSDS: R-22


* Disclosure as a toxic chemical is required under Section 313 of Title III of the Superfund Amendments and Reauthorization Act of 1986 and 40 CFR part 372.

HAZARDS IDENTIFICATION Potential Health Effects

Inhalation of high concentrations of vapor is harmful and may cause heart irregularities, unconsciousness or death. Intentional misuse or deliberate inhalation may cause death without warning. Vapor reduces oxygen available for breathing and is heavier than air. Liquid contact can cause frostbite.

HUMAN HEALTH EFFECTS:

Skin contact with the liquid may include frostbite. Prolonged overexposure may cause defatting or dryness of the skin. Eye contact with liquid may include eye irritation with discomfort, tearing, or blurring of vision.

Inhalation may include temporary nervous system depression with anesthetic effects such as dizziness, headache, confusion, incoordination, and loss of consciousness.

Higher exposures may lead to temporary alteration of the heart's electrical activity with irregular pulse, palpitations, or inadequate circulation. Fatality may occur from gross overexposure.

Individuals with preexisting diseases of the central nervous or cardiovascular system may have increased susceptibility to the toxicity of excessive exposures.

Carcinogenicity Information

None of the components present in this material at concentrations equal to or greater than 0.1% are listed by IARC, NTP, OSHA or ACGIH as a carcinogen.

FIRST AID MEASURES First Aid

INHALATION

If inhaled, immediately remove to fresh air. Keep person calm. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Call a physician.

SKIN CONTACT

In case of contact, flush area with lukewarm water. Do not use hot water. If frostbite has occurred, call a physician.

EYE CONTACT

In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Call a physician.

INGESTION


Ingestion is not considered a potential route of exposure.

Notes to Physicians

Because of possible disturbances of cardiac rhythm, catecholamine drugs, such as epinephrine, should only be used with special caution in situations of emergency life support.

FIRE FIGHTING MEASURES Flammable Properties

Flash Point : Will not burn Autodecomposition : 632 C (1170 F)

Other burning materials may cause HCFC-22 to burn weakly.

Chlorodifluoromethane is not flammable at ambient temperatures and atmospheric pressure. However, chlorodifluoromethane has been shown in tests to be combustible at pressures as low as 60 psig at ambient temperature when mixed with air at concentrations of 65 volume % air. Experimental data have also been reported which indicate combustibility of "FREON" 22 in the presence of certain concentrations of chlorine.

Fire and Explosion Hazards:

Cylinders may rupture under fire conditions. Decomposition may occur.

Extinguishing Media

As appropriate for combustibles in area. Extinguishant for other burning material in area is sufficient to stop burning.

Fire Fighting Instructions

Use water spray or fog to cool containers. Self-contained breathing apparatus (SCBA) is required if cylinders rupture or contents are released under fire conditions. Water runoff should be contained and neutralized prior to release.

ACCIDENTAL RELEASE MEASURES Safeguards (Personnel)

NOTE: Review FIRE FIGHTING MEASURES and HANDLING (PERSONNEL) sections before proceeding with clean-up. Use appropriate PERSONAL PROTECTIVE EQUIPMENT during clean-up.

Accidental Release Measures

Ventilate area, especially low or enclosed places where heavy vapors might collect. Remove open flames. Use self-contained breathing apparatus (SCBA) for large spills or releases.

HANDLING AND STORAGE


Handling (Personnel)

Use with sufficient ventilation to keep employee exposure below recommended limits. "FREON" 22 should not be mixed with air for leak testing. In general, it should not be used or allowed to be present with high concentrations of air above atmospheric pressure. Contact with chlorine or other strong oxidizing agents should also be avoided.

Storage

Clean, dry area. Do not heat above 52 C (125 F).

EXPOSURE CONTROLS/PERSONAL PROTECTION Engineering Controls

Normal ventilation for standard manufacturing procedures is generally adequate. Local exhaust should be used when large amounts are released. Mechanical ventilation should be used in low or enclosed places.

Personal Protective Equipment

Impervious gloves and chemical splash goggles should be used when handling liquid. Under normal manufacturing conditions, no respiratory protection is required when using this product. Self-contained breathing apparatus (SCBA) is required if a large release occurs.

# Exposure Guidelines

Applicable Exposure Limits METHANE, CHLORODIFLUORO- (HCFC 22) PEL (OSHA) : None Established TLV (ACGIH) : 1,000 ppm, 3,540 mg/m3, 8 Hr. TWA, A4 AEL * (DuPont) : None Established

* AEL is DuPont's Acceptable Exposure Limit. Where governmentally imposed occupational exposure limits which are lower than the AEL are in effect, such limits shall take precedence.

PHYSICAL AND CHEMICAL PROPERTIES Physical Data

Boiling Point : -40.8 C (-41.4 F) Vapor Pressure : 151 psig @ 25 C (77 F) Vapor Density : 3.03 (Air=1.0) @ 25 C (77 F) % Volatiles : 100 WT% Evaporation Rate : >1 (CCl4=1.0) Solubility in Water : 0.3 WT% @ 25 C (77 F) pH : Neutral Odor : Slight ethereal Form : Liquified Gas. Color : Clear, Colorless. Liquid Density : 1.194 g/cm3 @ 25 C (77 F)

STABILITY AND REACTIVITY Chemical Stability

Material is stable. However, avoid open flames and high


temperatures.

Incompatibility with Other Materials

Incompatible with alkali or alkaline earth metals--powdered Al, Zn, Be, etc.

Decomposition

Decomposition products are hazardous. HCFC-22 can be decomposed by high temperatures (open flames, glowing metal surfaces, etc.) forming hydrochloric and hydrofluoric acids, and possibly carbonyl halides. These materials are toxic and irritating. Contact should be avoided.

Polymerization

Polymerization will not occur.

TOXICOLOGICAL INFORMATION Animal Data

INHALATION:

4 hour, LC50, rat: 220,000 ppm.

The compound is a skin irritant and a slight eye irritant, but is not a skin sensitizer in animals.

Effects from single high exposures include central nervous system depression, anesthesia, rapid breathing, lung congestion and microscopic liver changes. Cardiac sensitization occurred in dogs at 50,000 ppm or greater from the action of exogenous epinephrine.

No toxic effects or abnormal histopathological observations occurred in rats repeatedly exposed to concentrations ranging from 10,000 to 50,000 ppm (v/v). Long-term exposures to 50,000 ppm (v/v) of vapors produced organ weight increases and a decrease in body weight gain, but no increased mortality or adverse hematological effects. In chronic inhalation studies, HCFC-22, at a concentration of 50,000 ppm (v/v), produced a small, but statistically significant increase of late-occurring tumors involving salivary glands in male rats, but not female rats or male or female mice. In the same studies, no increased incidence of tumors was seen in either species at concentrations of 10,000 ppm or 1,000 ppm (v/v).

Long-term administration in corn oil produced no effects on body weight or mortality.

HCFC-22 was mutagenic in some strains of bacteria in bacterial cell cultures, but not mammalian cell cultures or animals. It did not cause heritable genetic damage in mammals.

A slight, but significant increase in developmental toxicity was observed at high concentrations (50,000 ppm) of HCFC-22, a concentration which also produced toxic effects in the adult animal. Based on these findings, and other negative developmental studies, HCFC-22 is not considered a unique hazard to the conceptus. Studies of the effects of HCFC-22


on male reproductive performance have been negative. Specific studies to evaluate the effect on female reproductive performance have not been conducted, however, limited information obtained from studies on developmental toxicity do not indicate adverse effects on female reproductive performance at concentrations up to 50,000 ppm.

ECOLOGICAL INFORMATION Ecotoxicological Information

Aquatic Toxicity:

HCFC-22 48 hour EC50 - Daphnia magna: 433 mg/L

DISPOSAL CONSIDERATIONS Waste Disposal

Comply with Federal, State, and local regulations. Reclaim by distillation or remove to a permitted waste disposal facility.

TRANSPORTATION INFORMATION Shipping Information

DOT/IMO Proper Shipping Name : CHLORODIFLUOROMETHANE Hazard Class : 2.2 UN No. : 1018 DOT/IMO Label : NONFLAMMABLE GAS

Shipping Containers

Tank Cars. Tank Trucks. Cylinders.

REGULATORY INFORMATION U.S. Federal Regulations

TSCA Inventory Status : Reported/Included.

TITLE III HAZARD CLASSIFICATIONS SECTIONS 311, 312

Acute : Yes Chronic : No Fire : No Reactivity : No Pressure : Yes

HAZARDOUS CHEMICAL LISTS

SARA Extremely Hazardous Substance: No CERCLA Hazardous Substance : No SARA Toxic Chemical - See Components Section

OTHER INFORMATION


NFPA, NPCA-HMIS

NPCA-HMIS Rating Health : 1 Flammability : 0 Reactivity : 1

Personal Protection rating to be supplied by user depending on use conditions.

----------------------------------------------------------------------

The data in this Material Safety Data Sheet relates only to the specific material designated herein and does not relate to use in combination with any other material or in any process.

Responsibility for MSDS : DuPont Chemicals Address : Engineering & Product Safety > : P.O. Box 80709, Chestnut Run > : Wilmington, DE 19880-0709 Telephone : (302) 999-4946

# Indicates updated section.

End of MSDS

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