ICP Confidential Not for further publication Condensing Furnace Distributor Technical Training 1

ICP ConfidentialNot for further publication

1

Condensing FurnaceDistributor

Technical Training


2

Model Nomenclature System


3

Model Nomenclature System


4

Agenda

Product Line OverviewNew FeaturesInstallationAdjustmentServicing


5

Overview

• 95.5 AFUE • 4-way multipoise

– 100 & 120 size– 140 size limited to Upflow & Horizontal

• Aluminized steel primary and stainless steel secondary heat exchangers

• Direct Vent or Non-Direct Venting


6

New Features

• Lower height, now 35”• Standard widths

– 21” for 100 and 120 sizes – 24 ½” for 140 sizes

• Through-the-top venting• Multiple venting options• Internal Condensate system


7

New Features

• Slide out blowers• Ease of access for control board• Two outer doors• Easy door attachments

– No sharp edges– Quarter-turn knobs and latches


8

New Features

• Redesigned primary heat exchanger– More compact– No eyelets

• Updated tube-and-fin secondary– Better efficiency– Eliminated U-bend – Easier to service with

slide-out rails


9

New Technologies

• True installation flexibility– Venting flexibility

• Vent pipes can exit cabinet in three different directions

– Low-profile horizontal drain trap position• Easy to re-position the drain trap• Fewer tubes to connect• Drain trap and tubes removed from the blower

compartment


10

Casing


11

Casing


12

Casing


Casing

Combustion Air Opening

Gas Entry

Horizontal Drain Trap Opening

Vent or Combustion Air Opening

Condensate Drain K.O.

J Box K.O.

Return Air Opening

35”

Combustion Air Opening

Gas Entry

Vent or Combustion Air Opening

Horizontal Drain Trap Opening

Condensate Drain K.O.

J Box K.O.

Return Air Opening

13


14

Outer Door Assembly

• Two piece door design• ¼ turn door knob attachment• Doors are gasketed

– Eliminates door rattling and leakage

– Vestibule is sealed• Door does NOT change with

furnace orientation– Logo rotates for upflow and

downflow positions


15

Outer Door Assembly

• Vestibule functions as the burner compartment– Combustion air piped directly to the vestibule– Multiple locations to connect combustion air pipe

• Sealed burner box is not required• Simplifies set-up


16

Upflow Return Air Connections


17

Downflow Return Air Connections


18

Horizontal Return Air Connections


19

Upflow Venting


20

100,000 BTUH & 120,000 BTUH Downflow Venting


21

Horizontal Left Venting


22

Horizontal Right Venting


23

• Direct Vent– Concentric Vent– Field-fabricated 2-pipe

• Ventilated Combustion Air– Vent to outdoors– Combustion air from attic or crawlspace

• Single Pipe– Uses indoor air for combustion

Terminations


24

Ventilated Combustion Air Option

The combustion air pipe for the Ventilated Combustion Air Option cannot be terminated in attics or crawlspaces that use ventilation fans designed to operate during the heating season. If ventilation fans are present in these areas, the combustion air pipe must terminate outdoors as a Direct Vent / 2-Pipe system.


25

Indoor Air For Combustion Option

• Use a (minimum) 12-inch piece of PVC– Maximum of 5 feet

• Tight radius elbow– Face away for better sound

control• Secure pipe to adapter

– Pilot drill 1/8” hole– Install sheet metal screw– Seal with silicone

12” (min)


26

Alternate Indoor Air For Combustion Connection

12” (min)

12” (min)


27

Supply Air Flanges

• Flanges shipped flat– If flanges are not bent, nuisance

limit trips could occur• Bend flanges UP for upflow or

horizontal coil installations• Remove or bend flanges DOWN

for downflow coil installations– No downflow for 140,000 input

• Supply opening match current coil opening sizes


28

Supply Air Flanges


29

Return Air Connections• Upflow

– Either Side– Bottom– Any combination of Sides and Bottom

• Downflow (100,000 BTUH & 120,000 BTUH)– Bottom only (“bottom” as referenced to furnace in upflow position)

• Horizontal – Bottom– Side (side facing down only)

• Airflow above 1800 cfm may require both side/bottom return or bottom only return

• Remove closure panel for bottom return air


30

Return Air Connections


31

Gas Piping• Gas pipe can enter

from either side• Remove K/O on either

side gas entry• Install grommet in

casing• Flex lines must

connect outside of the casing per the NFGC

Sediment trap required per NFGC


32

Optional Right Side Gas Entry

• No special fittings for left side entry

• Valve inlet is ½” NPT• Install Street Ell, 2” nipple and

90º elbow together• Install Street Ell into gas valve• Remove K/O from casing• Install gas pipe grommet in

casing– (Required For Direct Vent)

• Install gas line into elbow• Tighten gas line

Use backup wrench on gas valve!


33

J-Box Installation

• J-box bracket and cover shipped in loose parts bag

• J-box can be relocated to opposite side

• Other electrical knock-outs are available


34

J-Box Installation

• Remove 7/8” knockout in casing

• Install J-box bracket• Attach ground wire to

green ground screw• Install cover after all

other connections are made

• Other electrical knock-outs are available


35

Typical Disconnect At Furnace

Power Cord Installation in Furnace J-Box (Where permitted)

NOTE: Power cords must be able to handle the electrical requirements listed in Table 6. Refer to power cord manufacturer’s listings.1. Remove 7/8” K.O. in casing.2. Attach J box bracket to casing.3. Route listed power cord through 7/8--in. (22 mm) diameter hole in casing.4. Attach power cord to J--Box bracket with a strain relief bushing or a connector approved for the type of cord used.5. Attach field ground wire to green ground screw on J-Box bracket.6. Connect line voltage leads as shown in wiring diagram7. Install cover to J--Box. Do not pinch wires between cover and bracket.


36

Upflow


37

Downflow - Trap UnconvertedPSC Inducer Models


38

Downflow - Trap ConvertedPSC Inducer Models

Route tube through

Switch Tube to PortOn Collector Box

To 15 ib-in


39

Horizontal Left - Trap UnconvertedPSC Inducer Models


40

Horizontal Left - Trap ConvertedPSC Inducer Models

Route Pressure Switch


41

Horizontal Right - Trap UnconvertedPSC Inducer Models


42

Horizontal Right - Trap ConvertedPSC Inducer Models


43

Horizontal Trap Grommet

• Required accessory for Direct Vent applications (only)

• Maintains a sealed vestibule


44

Repositioning Vent Elbow

• Loosen the Vent Elbow Clamp. • Remove the Vent Elbow. • Re-install in the desired position. • Torque clamp 15 lb-in.


45

Condensate Trap and Drain Elbow

• Clear trap– Shown for clarity

• Production Trap– White, Opaque front/Clear back


46

Condensate Trap

Expanded View Outlet Relief Port Inlets Front View Back View

Mounting Screw Hole


47

Right Side Drain

• Production trap will be opaque front/clear back• Connect field supplied CPVC fittings to drain tube• Clamp may be located inside casing• Connect condensate drain to code approved drain or condensate

pump approved for furnace condensate


48

Right Side Drain


49

Left Side Drain• Cut the tube as shown• Install formed end of

grommet in the left side of the casing

• Connect the elbow to the short end of Z pipe

• Slide clamps on elbow and pipe

• Route Z pipe behind inducer• The inducer can be removed

if necessary to install the Z pipe


50

Left Side Drain


51

Left Side Drain


52

Vent Sizing

• New tables based on Maximum Equivalent length– Starts with a maximum length– Deduct for type of fitting used– No restriction on number of elbows

• Diameters up to 4 inches on larger sizes• Expanded exposed vent pipe tables

– Winter design down to -40 deg. F (C) – ½ inch insulation added

• Closed cell Armaflex type


53

Maximum Equivalent Length Table


54

Deductions Table and Example


55

Vent Table Notes

1. Use only the vent pipe sizes shown for each furnace. It is NOT necessary to choose the smallest diameter pipe possible for venting.

2. NA – Not allowed. Pressure switch will not close, or flame disturbance may result.

3. Size both the combustion air and vent pipe independently, then use the larger size for both pipes.

4. Assume the two 45_ elbows equal one 90_ elbow. Wide radius elbows are desirable and may be required in some cases.

5. Elbow and pipe sections within the furnace casing and at the vent termination should not be included in vent length or elbow count.

6. The minimum pipe length is 5 ft. (2 M) linear feet (meters) for all applications.7. Use 3–in. (76 m) diameter vent termination kit for installations requiring 4–in.

(102 mm) diameter pipe.


56

Sizing The Vent Pipe


57

Sizing The Vent Pipe

DRAFT COPY - ICP CONFIDENTIAL


58

Vent Pipe Support

• Helps support vent pipe• Notches in coupling slide

over buttresses on adapter• Adds to unit serviceability

– Provides an optional disconnect point


59

Combustion Air Adapter

• Attach to K.O. on casing– Any unused top or side K.O.

may be used • Connect 2” combustion air

pipe to casing• Gluing is not recommended

– Pilot drill 1/8” hole and secure with ½” #7 sheet metal screw

– Seal with silicone


60

Comparing the Two Adapters(Both fit 2” PVC pipe)

Combustion Air Pipe Adapter

Vent Pipe Support

2 3/8”2”Internal pipe stop No pipe stop


61

Vent Coupling & Adapter

• Coupling is notched• Provides for proper

orientation of coupling

• Notches slide over buttresses on adapter


62

Vent Pipe Coupling & Combustion Air Pipe Adapter

Gaskets


63

Continuous Vent PipeVent pipeInserts through coupling to vent elbow

Vent coupling w/clampsSlides over adapter

Vent coupling adapterAttaches to furnace casing

Vent pipePasses through adapter Inserts into Vent Elbow

360° Vent ElbowConnects to vent pipe


64

Flush Mount Vent Pipe

Vent pipeInserts ½ way into coupling

Vent coupling w/clampsSlides over adapter

Vent coupling adapterAttaches to furnace casing

Vent pipe from inducerPasses through adapter Inserts ½ way into coupling

360° Vent coupling Vent pipe connects to coupling


65

• Measure the vent pipe– Insert pipe through K.O and

adapter w/gasket installed– Insert pipe into vent elbow

• Slide adapter down on furnace casing– Mark the pipe at the top of the

adapter• Remove pipe from vent elbow

– Cut pipe square

Flush Mount Vent Pipe


66

Optional Flush Mount Vent Pipe

• Clean and prime vent pipe• Pipe is inserted in vent elbow

– Clean and prime pipe

• Adapter with gasket is glued to vent pipe– Insert vent pipe into vent elbow– Apply cement to pipe and

adapter– Slide adapter over vent pipe

• If pipe is not glued to the adapter, the pipe will leak water!


67

• Attach vent pipe adapter to furnace casing with screws

• Install vent coupling– Align notches in vent

coupling over stand-offs on vent pipe adapter

– Push down to seat coupling

• Seat coupling on adapter• Torque clamp 15 lb-in.



68

• Insert remaining vent pipe into coupling

• Torque clamp on coupling 15 lb-in.

• Torque clamp on vent elbow 15 lb-in.



69

Vent Through Casing Side

• Install adapter/gasket• Install coupling-

– Align notched and fully seat on vent pipe adapter

• Attach remaining vent pipe• Torque all clamps 15 lb-in.


70

• Requires a (minimum) 12-inch pipe w/tight radius elbow• Pipe can be attached to any un-used 2-inch K.O.• Orient elbow or pipe away from front

– No combustion air disk required– Can be screened using ½” metal or plastic screening

Combustion Air Pipe (Non-Direct Vent)

12” 12”12”


71

Single-Stage and Two-Stage PSC Inducer Assembly

360°Inducer outlet coupling

PSC inducer motor

Capacitor


72

Single- and Two-StageInducer Assemblies

• Three unique sizes for each– PSC ball bearing motor– Provides optimum performance

• Adjustable vent coupling– Adjusts to 4 positions– Loosen the clamp, rotate the coupling, re-tighten the clamp

• Integral condensate drainage– No external hoses required

• Service replacement will be fully assembled


73

Key Features Inducer Assembly

Drain outlets with gaskets

Mounting tabs

Inlet gasket

Flue gas inlet


74

PSC Inducer Inlet ChokeFactory Installed

Inlet Choke Plate(when used)


75

Integrated Inducer Vent/DrainFlue gases exit through the inner opening

The larger opening channels condensate from the vent through the inducer and out the drain openings in the back of the inducer.


76

Vent Condensate DrainageFlue gases exit through the inner opening

The larger opening channels condensate from the vent through the inducer and out the drain openings in the back of the inducer.



77

Collector Box-Front View

Inducer drain openings

Inducer attachment points w/brass inserts (red circles)

Condensate trap gasket

Condensate trap gasket

Condensate trap openings for upflow and horizontal right

Condensate trap openings for downflow and horizontal left

Pressure Switch/Relief port

Outlet to inducer

Pressure Switch/Relief port


Single Stage Pressure Switches

• Single stage furnaces have 2 pressure switches– Housing Pressure Switch (HPS)

• Tapped into Inducer Housing• Connects electrically to the CPU of the furnace control board

– Collector Box Pressure Switch (LPS)• Tapped into Collector Box• Connects electrically to GVR via furnace control board

• The HPS has a lower set point than the LPS– HPS functions as a blocked vent switch– LPS functions as a blocked drain switch




Single Stage Wiring Diagram

• Refer to the legend• HPS

– Inducer Housing Pressure Switch, SPST (N.O.)

• LPS– Collector Box Pressure

Switch, SPST (N.O.)




Pressure Switch Settings


Input Part Number Collector Box Pressure Switch Housing Pressure Switch

Max Make-IWC Nom Break-IWC Max Make-IWC Nom Break-IWC

100 &

120HK06NB030 0.45 0.30 +/- 0.05 0.45 0.30 +/- 0.05

140 HK06NB031 0.45 0.30 +/- 0.05 0.60 0.45 +/- 0.05


83

Heat Exchanger AssemblyFront View


84

Heat Exchanger AssemblyRear View



85

Primary Assembly

• Completely redesigned heat exchanger• Compact multi-pass design• Aluminized• Service replacement sold fully assembled to the Primary Cell Inlet Plate


86

Condensing Heat Exchanger

• Fin and tube type design • Stainless steel tubes• Aluminum fins• Tubes are straight through• Turbulators are “locked” in each tube


87

Burners, HSI and Flame Sensor

• One piece burner design for each size• Burners are “ganged” together• Eliminates burner misalignment

– Note igniter and flame sensor locations• Igniter mounts from the top of the burner assembly• Flame sensor mounts through tab on burner• Flame sensor is positioned underneath burner

– Igniter resistance at room temp• 40 to 70 ohms

– Flame sensing current• 4 to 6 micro amps DC


88

Manifold Assembly Features(Top plate removed for clarity)

Manifold is the same type for all families

Four screws attach manifold here


89

Burner Assembly

Igniter resistance is 40 to 70 ohms @ room temperature and is stable over the life of the igniter


90

Burner Assembly


91

Single-Stage Gas Valve - Features


92

Blower Assemblies

• Improved blower rails• Forward-facing mounting

screws• Longer main harness

(not shown)– Blower can be removed

without harness removal• Forward-facing control

board

Mounting Screw Locations


93

Torsion-Flex Blower Motors

• Mounting arms attached to motor• Isolated with rubber grommets


94

Typical Blower Assembly (Expanded)


95

There are 2 sets of holes in the blower so if one set gets stripped, the whole motor can be rotated to the other set of holes.

For example:

One or more of the screws were stripped in the blower marked with a blue circle.

Remove all 4 mounting screws, rotate the motor to the holes with the arrows and re-install the screws.

Motor Mounting Holes


96

Remember!

• Either set of screw holes can be used to mount the blower as long as…– The same hole position is used for each

mounting arm– Do not use a left-side hole for one mounting

leg then a right side hole for another mounting leg.• This stresses the mounting arms and can

cause them to break


97

Propane Conversion

• Regulator spring change required for all models• Low Gas Pressure Switch (LGPS) required for

ALL models• Burners will use “Mixing Screws”

– 1 screw is installed in each burner venturi– Provide better mixing of propane and combustion air– Includes drill bit to drill the correct size hole


98

Converting The Gas Valve


99

Spoiler Screw


100

LGPS Installation– 14 3/16” casing– Or, vent passes across

vestibule– Install switch as shown

• Manifold removed• Add wires to switch• Install manifold


101

Low Gas Pressure Switch Installation


102

Low Gas Pressure Switch InstallationOptional Location


103

Setup and Service


104

Single-stage PSC

24vac Thermostat Connections

R, W, Y, G Inducer Pre/Post Purge 15 Sec/5 Sec

Heat On Delay 25 Sec EAC Yes

Heat Off Delay 90, 120, 150, 180 Hum 24 vac Q.C.

Cool On Delay 3 Sec Hum Method When Pressure Switch Closes

Cool Off Delay 90 Sec Blower Speeds Up to 4 speed taps at motor, 2 are controlled

Optional Cool Off Delay Cut J1 Jumper (non reversible)

Heat Airflow Selectable Heat

Component Self Test Yes Cool Airflow Selectable High Cool Only

Non-Volatile Memory Yes Continuous Fan Same as Heat

Control Board Features


105

Single-Stage PSC ControlComponent Layout


106

Optional 3-Second Cooling Off Delay

CUT J2 JUMPER TO REDUCE

90 SECOND COOLING OFF-DELAY TO 3 SECONDS

(NON-REVERSIBLE)


107

Single-Stage PSC ControlFan Speed Selection

SELECT HEATING AND COOLING SPEEDS REQUIRED

CONTINUOUS FAN SPEED IS HEATING SPEED

STORE EXTRA SPEEDS ON SPARE 1 AND SPARE 2 TERMINALS


108

Heating Off DelaySingle-Stage Control

2 PIN JUMPER: 1 TO 2 90 SECONDS 2 TO 3 120 SECONDS

3 TO 4 150 SECONDS 4 TO 5 180 SECONDS

90

150

120

180


109

Single-Stage ControlComponent Self Test

To initiate the component last sequence, shut OFF the room thermostat or disconnect the “R” thermostat lead. Briefly short the TEST/TWIN terminal to the COM/24V terminal (Red Arrow)Once initiated the Status LED will flash the last Status Code and then turn ON the inducerThe inducer motor will run for the entire component test. The hot surface igniter, blower motor FAN speed (if equipped), blower motor Heat speed and blower motor COOL speed will be turned ON for 15 seconds each. Gas Valve and Humidifier will not be turned on.


Status CodesCode Description

Heartbeat NO PREVIOUS CODE • Stored status codes are erased automatically after 72 hours or as specified above.

2 PRESSURE SWITCH DID NOT OPEN. Check for: Obstructed pressure switch tubing, Pressure switch stuck closed.

3 PRESSURE SWITCH DID NOT CLOSE OR RE-OPENED. Check for: If LPS is open longer than 6 minutes, inducer shuts off for 18 minutes before re-try. If HPS remains open for 72 seconds after the gas valve closes (after 3 successive trials) the furnace control will lockout for 3 ½ hours before re-try

4 LIMIT CIRCUIT FAULT. Indicates a limit or flame rollout switch is open. Blower will run for 4 minutes or until open switch remakes whichever is longer. If open longer than 3 minutes, code changes to lockout #7. If open less than 3 1/2 minutes status code #4 continues to flash until blower shuts off. Flame rollout switch requires manual reset. Check for: Dirty filter or restricted duct system-Improper limit switch or no limit gasket. Defective switch or connections- Improper gas input adjustment- Loose blower wheel

5 ABNORMAL FLAME PROVING SIGNAL, Flame is proved while gas valve is de-energized. Inducer will run until fault is cleared. Check for: Leaky gas valve; Stuck-open gas valve; Dirty flame sensor insulator

6 IGNITION PROVING FAULT -Control will try three more times before lockout #14 occurs. If flame signal lost during blower time limits. Thirty seconds after being turned ON or ten seconds during steady-state operation. Check for:- Oxide buildup on flame sensor (clean with fine steel wool) - Proper flame sense microamps (.5 microamps D.C. min., 4.0 - 6.0 nominal) Manual valve shut-off- Control ground continuity- Gas valve defective fumed 'OFF'- Low inlet gas pressure-Defective hot surface igniter-Flame sensor must not be grounded-Green/yellow wire MUST be connected to furnace sheet metal.

110


111

Code Description

7 LIMIT CIRCUIT LOCKOUT. Lockout occurs If a limit or flame rollout switch is open longer than 3 ½ minutes. Control will auto-reset in 3 hrs. Refer to Code 4.

8 GAS HEATING LOCKOUT • Control will NOT auto reset. Check for - Mis-wired gas valve -Defective control (valve relay)

9 POLARITY Line voltage (220 VAC) polarity reversed.

1 + 2 BLOWER ON AFTER POWER UP (115VAC or 24VAC)- Blower runs for 90 seconds, if unit is powered up during a call for heat (R to W/W1 closed) or (R to W/W1) opens during the blower on delay period.

6 + 1 IGNITION LOCKOUT Control will auto reset in 3 ½ hours. Refer to Code 6

OFF SECONDARY VOLTAGE FUSE IS OPEN • Check for - Short circuit in secondary voltage (24VAC) wiring.

On (solid) CONTROL CIRCUITRY LOCKOUT Auto reset after 72 minutes. Lockout due to: Gas Valve relay stuck open. Flame sense circuitry failure. Software check error. Reset power to clear lockout. Replace control if status code repeats.

Status Codes


112

Sequence Of Operation

• NOTE: Furnace control must be grounded for proper operation or control will lock out. Control is grounded through green/yellow wire routed to gas valve and manifold bracket screw. Using the schematic diagram in Fig. 64, follow the sequence of operation through the different modes. Read and follow the wiring diagram very carefully.

• NOTE: If a power interruption occurs during a call for heat (W), the control will start a 108–sec blower–only ON period two sec after power is restored, if the thermostat is still calling for gas heating. The Green LED light will flash Code 1+2 during the 108–sec period, after which the LED will be flashing a heartbeat, as long as no faults are detected. After the 108–sec period, the furnace will respond to the thermostat normally.


113


114

ThermostatThermostat


115



116



117




118DRAFT COPY - ICP CONFIDENTIAL


119

Start-up

• Refer to the installation instructions for specific start-up details

• Start-up procedures are:– Verify installation is complete– Verify the correct orifices are installed– Prime the condensate trap– Purge the gas supply line– Check the inlet gas pressure


120

Start-up Continued

• Start-up procedures (continued) are:– Adjust the manifold pressure– Set the temperature rise– Set the blower off delay– Set the cooling airflow– Check safety control operation– Review installation checklist


Priming The Condensate Trap1. Remove upper and middle collector box drain plugs oppositeof the condensate trap.2. Connect field-supplied 5/8--in. (16 mm) ID tube with attached funnel to upper collector box drain connection.3. Pour one quart (liter) of water into funnel/tube. Water should run through collector box, overfill condensate trap,and flow into open field drain.4. Remove funnel; replace collector box drain plug.5. Connect field-supplied 5/8-in. (16 mm) ID tube to middle collector box drain port.6. Pour one quart (liter) of water into funnel/tube. Water should run through collector box, overfill condensate trap,and flow into open field drain.7. Remove funnel and tube from collector box and replace collectorbox drain plug.


122

Start-up Continued• Start-up procedures are:

– Check the inlet gas pressure• Use a good quality fluid-filled manometer to measure

the inlet pressure at the gas valve• Set the furnace to call for heat

– Verify inlet gas pressure does not drop below minimum inlet pressure

» 4.5 IWC for Natural Gas» 12.0 for Propane

– Adjust the manifold pressure• Manifold/orifice tables are provided• Use a good quality fluid-filled manometer to measure

the manifold pressure at the gas valve– Adjust manifold pressure at the regulator of the gas valve


123

Single-Stage Gas Valve - Features


124

Start-up Continued• Start-up procedures (cont.) are:

– Set the temperature rise• Temperature rise shown on the unit rating plate• Run the furnace at steady state• Measure the temperature in the supply air and the return air

– Measure supply temperature away from the line of sight of the heat exchanger

• Subtract the return air temperature from the supply air temperature

• Change blower speed to increase or decrease the temperature rise

• Change blower speed at the heating relay on the furnace control board

– Ideal point is at the mid-point of the rise or slightly above the midpoint.


125

Start-up Continued

• Start-up procedures (cont.) are:– Set the blower off delay

• Move the jumper on the control board to the desired off delay time

– Set the cooling airflow• Blower airflow tables are in the installation

instructions.– Typical cooling speed is high speed

• Change motor speeds at the cooling relay on the furnace control board


126

Single-Stage PSC ControlComponent Layout


127

Single-Stage PSC ControlFan Speed Selection

SELECT HEATING AND COOLING SPEEDS REQUIRED

CONTINUOUS FAN SPEED IS HEATING SPEED

STORE EXTRA SPEEDS ON SPARE 1 AND SPARE 2 TERMINALS


128

Heating Off DelaySingle-Stage Control

2 PIN JUMPER: 1 TO 2 90 SECONDS 2 TO 3 120 SECONDS

3 TO 4 150 SECONDS 4 TO 5 180 SECONDS

90

150

120

180


129

Start-up Continued

• Start-up procedures (cont.) are:– Check safety control operation

• Pressure switch operation• Limit switch operation• Flame sensing circuit

– Review installation checklist

Documents

ICP Confidential Not for further publication Condensing Furnace Distributor Technical Training 1