CALEFFIACCREDITED

ISO 9001 No. 0003ISO 9001 FM 21654

Technical specifications

Housing, plastic: PC-ABS and PMMAProtection type: indoor onlyMounting: wall Display: extra large LCD with symbols and textInterface: seven soft-push control buttonsInputs: 8 Pt1000 temperature sensors

1 V40 impulse flow meter sensor1 CS10 irradiation sensor

Outputs: 4 triac and 1 dry contact relays0-10 V high efficiency pump speed control

Switching relay capacities: - (4) triac: 1A /120V - (1) dry contact: 2A /24VPower supply: 100–240V, 50/60 HzData interface: VBus, SD card slot

Performance ΔT adjustment range: 2–40ºFΔ (1–20ºCΔ)Min. temperature differential: 2ºFΔ (1ºCΔ)Hysteresis: 2ºFΔ, ± 1ºFΔ (1ºCΔ, ± .5ºCΔ)Max. tank temperature range: 35–205°F (1–95ºC)Max. collector temperature range: 210–375°F (100–190ºC)Emergency shut down of the collector: 230–395°F (110–200ºC)Min. collector temperature range: 50–195ºF (10–90°C)Antifreeze temperature option: 15–50°F (-10–10ºC)kWh (BTU) flow input: 0–99 gpm (0–375 lpm)

Temperature sensorsPlatinum RTD type: 1,000 ohmCollector sensor (black) working range: -58–355ºF (-50–180°C)Tank sensor (gray) working range: 15–175ºF (-10–80°C)Length of collector sensor cable: 60 in. (1.5 m)Length of tank sensor cable: 95 in. (2.5 m)

Resistance value (Ω) used to communicate temperature at the RTD sensor is directly proportional to the temperature at the sensor.

°F 14 23 32 41 50 59 68 77 86

Ω 961 980 1000 1019 1039 1058 1078 1097 1117

°F 95 104 113 122 131 140 149 158 167

Ω 1136 1155 1175 1194 1213 1323 1252 1271 1290

°F 176 185 194 203 212 221 230 239 248

Ω 1309 1328 1347 1366 1385 1404 1423 1442 1461

Energy metering options

1. Standard temperature sensors, direct flow entry: Used for approximate energy metering only.

2. Rotary pulse flow meter & standard temperature sensors: Alternative method for accurate, real-time energy metering.

iSolar™ temperature differential system controllerMX LTE

01274/13 NA

Function

The iSolar™ MX LTE is a multi-functional temperature differential controller with built-in system functions for use in a wide variety of solar thermal heating applications. iSolar™ MX LTE is equipped with four triac pump speed control relays, one dry contact relay and one 0 – 10 V pump speed control signal output. The controller is equipped with eight Pt1000 sensor inputs, one V40 impulse flow meter input and one CS10 irradiation sensor input. Several system configuration options are predefined for control of a standard solar water heating system, drainback systems, multiple storage tanks (up to 4 total), heat dump and storage tank booster heating.

Unique Features of this controller include:- Large Liquid Crystal Display (LCD) user interface with seven

control buttons- Easy-to-use icons to operate and customize a solar heating system- Intuitive commissioning menu leading through initial configuration set-up- All sensor and relay selections listed in service menu- Speed control for a high efficiency pump- Integrated SD memory card slot enabling easy data logging and back

up to SD memory card or convenient transfer of logged system data to PC

- Built-in clock and calendar for scheduling- Built-in energy measurement- Parallel relay operation and drainback control

Product range

Code 257280A LTE iSolar™ MX LTE controller with 4 triac pump speed control relays, 1 dry contact relay and 0 -10 V pump control

.......................................................................................................................................includes 5 RTD temperature sensors and 0-10 V adapter cable

COL 128.6 °F

!

B C

DA

Solar MX LTE

S1 S2 S3 S4 S5 S6 S7 S8 R4R5

IP20

R5 N

R1-R4

100 ... 240 V~50-60 Hz

T4A

1 (1) A (100 ... 240) V~4 (1) A 240 V~4 (1) A 24V

R5

R3 R2 R1 L' LGND

Temp. Sensor

0-10V

CS10

V40/

S9

VBus

VBus

GN

D

Milwaukee, WI 53208NORTH AMERICA, Inc.CALEFFI

Dimensions

Code A B C D Wt. (lb.)

257270A 611⁄16" 73⁄4" 7" 111⁄16" 3.0

Characteristics

User-friendly operation

Large LCD display with 16 segment alphanumeric display, 7 segment numeric display and 8 symbols to indicate system status

7 soft push-button controls

SD memory card slot

Operating LED control lamp

Attractive and compact design

Easy to install

Pump speed control functions (some configurations)Pump speed control can improve system efficiency by reducing the flow to the collectors on cloudy days, thereby increasing the ΔT between the collector and the tank, which improves solar thermal transfer and reduces electrical consumption.

If the value for the ΔT switch-on is reached (e.g., ΔT on = 9ºFΔ), the pump will start with 100% pump speed for 10 seconds, then reduce the speed to the adjusted minimum pump speed (min. pump speed = 30%, adjustable).

If the temperature difference reaches the set value (e.g., ΔT Set = 18ºFΔ), pump speed will increase by 10%. At any further rise of 3ºFΔT the pump speed will increase by 10% until the maximum of 100% is reached.

Wiring connections at iSolar™ MX LTE temperature differential system controller

Abbreviations/Legend:S1: sensor 1 (collector 1 sensor)S2: sensor 2 (e.g. tank sensor base)S3: sensor 3 (e.g. tank sensor top)S4: sensor 3 (e.g. tank sensor store 2)S5: sensor 3 (e.g. collector 2 sensor)V40: V40 rotary pulse flow meter

VBus: power : ground terminal

R1-R4: conductorsL': conductor not connected with the mains cableL: conductorN: neutral conductor

Speed control for a high efficiency pump

The terminal marked 0–10 V is a control output for one high-efficiency pump: Power comes from R1, control signal comes from 0–10 V terminal. R1 in the programming menu must be set to 0–10 V.

This ouput can be selected in the in/outputs menu for Relay 1. Relay 1 is not involved in speed control. The last 2 pin connections in the adapter cable (provided) are to be connected to the pump. Connect brown and white (cable marked PWM 2) to pump power connections.

S1 S2 S3 S4 S5 S6 S7 S8 R4R5

IP20

R5 N

R1-R4

100 ... 240 V~50-60 Hz

T4A

1 (1) A (100 ... 240) V~4 (1) A 240 V~4 (1) A 24V

R5

R3 R2 R1 L' LGND

Temp. Sensor

0-10V

CS10

V40/

S9

VBus

VBus

GN

D

Milwaukee, WI 53208NORTH AMERICA, Inc.CALEFFI

R1

S1

S2

Standard operation options and functions

General:

System configuration options — Seven basic solar system configuration (arrangement) options, with variants for a total of 20 systems are pre-programmed into the controller.

ΔT control — When the switch-on temperature difference is reached, the pump is activated until the differential temperature reaches or falls below the adjusted switch-off temperature difference.

Maximum tank temperature — When the maximum tank temperature is exceeded, the pump turns off. Sensor 3 can be selected as tank 1 maximum temperature.

Sensor max. temperature — When the value at the selected sensor reaches the limit temperature, the system will be turned off.

Collector freeze protection — If the temperature falls below the adjusted value, the pump is turned on to protect the fluid from freezing.

Overrun — Tank loading continues after the temperature difference between the collector and the tank falls below the switch-off difference, until the ΔT overrun condition is met.

System cooling — If the temperature rises to the maximum adjusted collector temperature, the pump remains on until the temperature falls below the adjusted value.

Tank cooling — In the evening, the pump continues running until the storage tank is cooled down.

Return preheating — Heating circuit is pre-heated by the solar circuit energy.

Time-controlled thermostatic operation — Works independently from the solar operation for discharging surplus energy or for afterheating.

Manual operation — For manually adjusting the operating mode of the controller during controlling and servicing.

Energy generation measurement kWh (BTU) — The energy generated in the system is measured by the flow — with either the V40 flow meter or manually entered into the controller — and the temperature of the supply and return temperature sensors.

Thermal disinfection — For protecting the upper tank against legionella by actuating booster heating if required.

Sensor failure alarm — indicates sensor failures with buttons flashing read, hand symbol in display with codes identifying seven failure causes.

Counter — Measures operating hours of solar pump.

Solar circuit bypass — to prevent energy loss from tank when starting tank loading, this ensures that cold fluid in the pipes is diverted past the tank via a bypass (valve or pump). When warm enough, the tank can be loaded. The switch-on conditions can be adjusted individually.

Irradiation dependent bypass — with a CS10 irradiation sensor connected and CS bypass function is activated, the irradiation setting switches on the collector circuit.

Drainback:

Drainback option — A drainback system permits the heat transfer fluid to drain back into the holding tank when solar energy is not collected. Available in 6 pre-programmed system configurations (arrangements).

Drainback switch-on condition — Adjusts the time period during which the “ΔT On” condition must be maintained before solar pump will start.

Drainback filling time — Adjusts the fill time. During this period, the pump runs at 100% speed.

Drainback stabilization — Adjusts the time period during which the switch-off condition will be ignored after the filling time has ended.

Drainback booster function — Turns on a second pump when filling the solar system. When filled, the second pump turns off.

Multiple tanks:

Second tank loading — The second tank can be turned off for loading.

Priority logic — Used in systems with tank loading in layers only and determines how the heat is divided between the tanks.

Tank set option — Used in 2-tank systems. When the primary tank reaches its set temperature, the secondary tank will be loaded until it reaches its set temperature. The system will continue to cycle in this fashion.

Pause control option — When pause speed is activated, the relay of the tank which has been loaded last remains turned on during the loading break time. When pump delay is activated, the corresponding relay for the valve will be energized first.

Heat exchange — Transfers heat between tanks, pre-heats return flow, or accomodates solid fuel boiler use.

Parallel relay:

Parallel relay — A valve or pump can be controlled in parallel to the pump via a separate relay.

Heat dumping function — Heat dumping works independently from the solar operation and activates the second relay.

Max./min. temperature limitation — If the temperature exceeds or falls below the adjusted value, the relay will be turned off.

Collector:

Collector emergency shutdown — If the maximum collector temperature is exceeded, the pump turns off.

Collector cooling — If the collector temperature increases to the adjusted maximum value, the solar pump is activated until the collector temperature falls below the maximum collector temperature.

Minimum collector temperature — The collector circuit is activated when the minimum switch-on temperature is exceeded.

Tube collector — Helps overcome the non-ideal sensor position with some tube collectors. The collector circuit pump turns on for an adjustable runtime between adjustable standstill intervals to compensate for the delayed temperature measurement.

Pumps:

Pump speed control — Improves system efficiency by reducing flow on cloudy days; when the switch-on temperature difference is reached, the pump is activated at 100% speed for 10 seconds and then reduced to the minimum pump speed value.

Pump control — Adjusts the pump control type.

Min./max. pump speed — A relative minimum and maximum speed for connected pumps can be allocated to the outputs R1, R2 and R3.

Pump exercise — Switches on the relays every day at 12:00 a.m. for 10 seconds at 100% to protect the pumps against sticking.

High efficiency pump speed control — One switching output with 0-10 V allows for variable speed control.

Selectable solar system configuration options

The following schematics depict the solar system configuration options that are pre-programmed into the iSolar™ MX LTE controller. These definitions encompass essentially any system layout that includes a solar thermal collector.

These configurations simplify the setup of the iSolar™ MX LTE temperature differential system controller and provide the facility owner the flexibility to easily reconfigure the system at any time.

Choose the solar system configuration with essentially any combination of the following system features:

- Standard setup - Backup heat (solid fuel boiler and thermostatic)- Pump logic - Layered storage tank loading- Valve logic - Heating circuit return preheating- Drainback option - Multi-tank heat exchange control- East/west collectors - Time-controlled thermostat function - Thermal disinfection

R1

S1

S2

Standard solar system with 1 storage tank

1

S1

S1

R1

R2

S6

Solar system with East/West collectors – 2 pumps, 3 sensors and 1 storage tank

2.1

S1 S6

R1

R3R2

S2

Solar system with East/West collectors – 1 pump, 2-way valves on collectors, 3 sensors and 1 storage tank (pump/valve logic)

2.2

S1

R2

R1S2 S4

Solar system with 1 pump, one 3-way valve, 3 sensors and 2 storage tanks (3-way valve logic)

3.1

R1

R2 R3S2 S4

S1

Solar system with 1 pump, 3 sensors and 2-way valves on 2 storage tanks (valve logic)

3.3

S1

R1 R2

S4S2

Solar system with 3 sensors and pumps on 2 storage tanks (pump logic)

3.2

R1R2 R3

S2 S4

S1 S6

Solar system with 2 collector arrays , 2 pumps, 4 sensors, one 3-way valve and 2 storage tanks (3-way valve logic)

4.1

R1R2

S1 S6

R3 R4S4S2

Solar system with 2 collector arrays , 2 pumps, 4 sensors, 2-way valves on 2 storage tanks (valve logic)

4.2

R1

R2

S1 S6

R3

R4

S4S2

Solar system with 2 collector arrays , 2 pumps, 4 sensors, 2-way valves on 2 collectors (valve/pump control)

4.3

R1R2

S2 S4

R4

S1 S6

R3

Solar system with 2 collector arrays , 1 pump, 4 sensors, 3-way valve, 2-way valves on 2 collectors and 2 storage tanks (valve logic)

4.4

S1

R1

R2 R3 R4

S2 S4 S5

Solar system with 1 pump, 4 sensors, 2-way valves on 3 storage tanks (valve logic)

5.1

S1

R1 R2 R3

S5S4S2

Solar system with 4 sensors and pumps on 3 storage tanks (pump logic)

5.2

S1

S2 S4 S5R1

R3R2

Solar system with 1 pump, 4 sensors, two 3-way valves and 3 storage tanks (3-way valve logic)

5.3

R1 R2

S6S1

S2 S4 S5

R5R4R3

Solar system with 2 collector arrays, 2 pumps, 5 sensors, 2-way valves on 3 storage tanks (pump/valve logic)

6.1

S1 S6

S2 S4 S5

R1 R2 R3

R5R4

Solar system with 2 collector arrays, 3 pumps, 5 sensors, 2-way valves on collectors and 3 storage tanks (valve/pump control)

6.2

S1

S2 S4 S5R3

R5R4

R2

S6

R1

Solar system with 2 collector arrays, 1 pump, 5 sensors, two 3-way valves, 2-way valves on collectors and 3 storage tanks (valve logic)

6.3

S2 S4 S5

S1

S6R1

R2 R3 R4

Solar system with 1 pump, 5 sensors, three 3-way valves and 4 storage tanks (3-way valve logic)

7.2

S2 S4 S5

S1 S6

R1 R2

R3 R4

Solar system with 2 collector arrays, 2 pump, 5 sensors and two 3-way valves, 2-way valves on collectors and 3 storage tanks (3-way valve logic)

6.4

S1

S2 S4 S5 S6

R1 R2 R3 R4

Solar system with 5 sensors and pumps on 4 storage tanks (pump logic)

7.3

S2 S4 S5

S1

S6R1

R2 R3 R4 R5

Solar system with 1 pump, 5 sensors, 2-way valves on 4 storage tanks (valve logic)

7.1

2 tank solar system with valve logic and heat exchange control

Solar system with tank loading in layers and 2 tanks

Solar system with east/west collectors, 2 tanks and external heat exchanger, 3-way valve control

Solar system with 2 tanks and external heat exchanger, pump control.

Extendable by a range of pre-programmed optional functions, such as:

Bypass variant layout (pump) Bypass variant layout (valve) Drainback system with booster pump

Heat dissipator Heat exchange Solid fuel boiler

Example programmable systems:

Sweat unions (included).

NA79701

NA79702NA79703NA79704NA79705

A

B

CD

A B

CD

E

E

NA79701

NA79702NA79703NA79704NA79705

Technical specifications

Materials:

Meter body - body and sealing plate: brass - seals (head to body): EPDM

Meter head - housing: brass, stainless steel, composites - bearings: hard metal, sapphire,

chrome nickel steel - impeller wheel/head piece: high grade

synthetic material

Performance:Medium: water and glycolMax. percent of glycol: 50%Working temperature range: -40–210°F (-40–100°C)Max. working pressure: 235 psi (16 bar)Max. fluid temperature: 265°F (130°C)Flow range: - NA79701: 1/4–10 gpm (1–40 lpm) - NA79702: 1/2–15 gpm (2–50 lpm) - NA79703: 1/2–25 gpm (2–100 lpm) - NA79704: 1–45 gpm (4–170 lpm) - NA79705: 1-1/2–65 gpm (6–240 lpm)Flow accuracy (full scale): ±2%

Connections - sweat union: 3/4", 1", 1-1/4", 1-1/2" & 2"

Function

Series NA797 V40 rotary pulse flow meters are optional components to be used in conjunction with the iSolar™ MX LTE temperature differential system controller to measure heat energy.

The V40 rotary pulse flow meters measure flow in the flow stream of the solar system while standard RTD temperature sensors — included with iSolar™ MX LTE controller — transmit temperature readings at critical points in the system. These flow and temperature readings are calculated into heat energy in the iSolar™ MX LTE controller and displayed as kWh or BTU units. This information is stored on the iSolar™ MX LTE ’s SD memory card and can be exported and used to analyze and verify real-time and cumulative heat energy generation values from the solar collectors.

Accurate to international standards OIML R75, EN1434 and MID.

NA797 series V40 rotary pulse flow meters

Product range

Code NA79701 V40 single-jet rotary pulse flow meter 1 pulse = 1 liter* 1/4 – 10 gpm ..............................includes 3/4" union sweat fittingsCode NA79702 V40 multi-jet rotary pulse flow meter 1 pulse = 2.5 liters* 1/2 – 15 gpm ................................. includes 1" union sweat fittingsCode NA79703 V40 multi-jet rotary pulse flow meter 1 pulse = 10 liters* 1/2 – 25 gpm ........................... includes 1-1/4" union sweat fittingsCode NA79704 V40 multi-jet pulse flow meter 1 pulse = 10 liters* 1 – 45 gpm ........................... includes 1-1/2" union sweat fittingsCode NA79705 V40 multi-jet pulse flow meter 1 pulse = 10 liters* 1-1/2 – 65 gpm ................................. includes 2" union sweat fittings

*The pulse rate value input to MX LTE controller (FIMP subchannel) during set up is in liters. Check the tag attached to V40 flow meter to confirm pulse rate.

Dimensions

Code A B C D E Wt. (lb.)

NA79701 71⁄4" 31⁄8" 41⁄4" 31⁄2" 3⁄4" * 3.0

NA79702 121⁄4" 315⁄16" 53⁄8" 33⁄4" 1" * 5.0

NA79703 121⁄4" 41⁄16" 53⁄8" 33⁄4" 11⁄4" * 8.0

NA79704 17" 51⁄4" 67⁄16" 45⁄8" 11⁄2" * 14.0

NA79705 18" 515⁄16" 7" 43⁄4" 2" * 17.0

*Sweat tailpiece

0.1

1

10

0.2

0.3

0.40.5

2

3

45

0.1

1

10

0.2

0.3

0.40.5

2

3

45

0.01

0.1

0.02

0.03

0.040.05

0.2

0.3

0.40.5

0.6

∆P (psi)∆P (psi) ∆P (bar)

Flow rate (gpm)

Flow rate (m3/h)

10

0.3 100.5 1 5

1 5 5020 70

203

NA7

9701

(3/4

")

NA7

9702

(1")

NA7

9703

(1 1

/4")

NA7

9704

(1 1

/2")

NA7

9705

(2")

2

1

3

2

1

3

Operating principle

Flow measurement is based on pulses generated in the meter head. The brass flow pipe directs hydronic fluid to the impeller turbine (1), causing it to spin. The flow meter head (2) generates a pulse to turn the rotary volume indicator disc (3) according to a pre-calibrated volume per pulse. This pulse sends a signal through the communication cable to the iSolar™ MX LTE temperature differential system controller, where this information is used to calculate real-time and cumulative heat energy generation values.

Enter the value of volume/impulse, in liters, from tag attached to the V40 rotary meter into the MX LTE controller (FIMP subchannel).

Pressure drop across V40 rotary pulse flow meter

Code Description

NA15027 Electrical box Code Description

257201A Datalogger

Code Description

257204A Datalogger with BACnet IP

Code Description

NA15023 Outdoor air temperature sensor

Code Description

NA15028 VFS & RPS molded cable, 10'

Code Description

NA257102 Solar irradiation sensor

NA150Steel electrical mounting box with cover for iSolar™ MX LTE controller.

257iSolar™ DL2 intelligent web enabled datalogger connects to VBus data terminals on one iSolar™ controller.

257iSolar™ DL3 intelligent web enabled datalogger/BACnet IP gateway connects to VBus data terminals on six iSolar™ controllers.

SP10The lightning protector SP10 device is used to protect the collector temperature sensor and controller against external over-voltages such as those caused by lightning strikes.

AM1Alarm module AM1 to VBus data interface is used to signal sensor failures to a red flash-LED optical signal and a dry contact output relay, whuch can be connected to an additional signaling device or to a building management system.

CS10The solar cell is used for measuring the irradiation intensity. The short-circuit current rises with increasing irradiation intensity. Depending on the controller, the sensor can also be used for additional indirect or direct control. The connecting two wire cable can be extended to 300 ft.

Accessories

NA79701

NA79702NA79703NA79704NA79705

We reserve the right to change our products and their relevant technical data, contained in this publication, at any time and without prior notice.

Caleffi North America, Inc. 3883 W. Milwaukee Road Milwaukee, WI 53208 Tel: 414-238-2360 · Fax: 414-238-2366sales@caleffi.com · www.caleffi.us© Copyright 2013 Caleffi North America, Inc.

VFS sensor

VBus

VBusV40

S2

S1

RPS

Flow

Return

VFS

RPS sensor

1

0%

890 d

VBus

100%

2 3 4 5 6

Sensors

CL 1 2 3

1

0%

890 d

VBus

100%

2 3 4 5 6

Sensors

CL 1 2 3

Optional iSolar™DL2 or DL3 (pictured)

Datalogger

Optional iSolar™DL2 or DL3 (pictured)

Datalogger

COL 128.6 °F

!

COL 128.6 °F

!

V40flow meter

Returntemperaturesensor

Flow temperaturesensor

iSolar™ MX LTEPC-ABS and PMMA housing plastic. Protection type is Indoor only. Wall mounting. Display is extra large LCD with symbols and text. Seven soft push button interface. Eight temperature sensor inputs. One V40 impulse flow meter sensor input. Four triac and one dry contact relay outputs. Four triac 1 Amp 120VAC and one dry contact 2 Amp 24VAC relay capacities. 100–240 VAC, 50–60 Hz power supply. VBus data connection interface SD card slot. 2–40ºFΔ (1–20ºCΔ) ΔT adjustment range. 2ºFΔ (1ºCΔ) minimum temperature differential. 2ºFΔ, ±1ºFΔ (1ºCΔ, ±.5ºC) hysteresis. 35–205°F (1–95ºC) maximum tank temperature range. 210–375°F (100–190ºC) maximum collector temperature range. 230–395°F (110–200ºC) emergency shut down of the collector. 50–195ºF (10–90°C) minimum collector temperature range. 15–50°F (-10–10ºC) antifreeze temperature option. 0–99 gpm (0–375 lpm) kWh (BTU) flow input. Five 1,000 ohm platinum resistance temperature detector (RTD) type temperature sensors included. -58–355ºF (-50–180°C) collector sensor working range. 15–175ºF (-10–80°C) tank sensor working range. Collector sensor cable length of 60 in. (1.5 m). Tank sensor cable length of 95 in. (2.5 m). For heat energy measurement, provide V40 rotary pulse flow meter.

V40 rotary pulse flow metersV40 rotary pulse flow meter for use with iSolar™ MX LTE temperature differential system controller. Body and sealing plate brass, head to body seals EPDM, meter head housing brass, stainless steel, composites, bearings hard metal, sapphire, chrome nickel steel, impeller wheel/head piece high grade synthetic material. Suitable fluids: water or 50% maximum glycol solution. Working temperature range -40 to 210°F (-40 to 100°C), max. fluid temperature 265°F (130°C). Maximum working pressure 235 psi (16 bar). Flow accuracy (full scale): ±2%. Accurate to International Standards OIML R75, EN1434 and MID. For code NA79701 single-jet, flow measuring rate 1/4 to 10 gpm (1–40 lpm), connections 3/4" union sweat. For code NA79702 multi-jet, flow measuring rate 1/2 to 15 gpm (2–50 lpm), connections 1" union sweat. For code NA79703 multi-jet, flow measuring rate 1/2 to 25 gpm (2–100 lpm), connections 1-1/4" union sweat. For code NA79704 multi-jet, flow measuring rate 1 to 45 gpm (4–170 lpm), connections 1-1/2" union sweat. For code NA79705 multi-jet, flow measuring rate 1-1/2 to 65 gpm (6–240 lpm), connections 2" union sweat.

SPECIFICATION SUMMARIES

Application diagram

Heat metering