ALTERATIONS REQ’D FOR A/C @ DESIGN EXTERNAL STATIC PRESSURE. Revolv VMA1-75N

All installations and services must be performed by qualified service personnel.

VMA1-75

ALTERATIONS REQ’D FOR A/C @ DESIGN EXTERNAL STATIC PRESSURE

COOLING UNIT HTG Speed Recommended CLG Speed

24,000

30,000

36,000

MED-LOW

MED-LOW

MED-LOW

MED-LOW

MED-HIGH

HIGH

Speed Tap \

Static

Pressure

Low

ML

MH

High

Speed Tap \

Static

Pressure

Low

ML

MH

High

Speed Tap \

Static

Low

ML

MH

High

Furnace Airflow (CFM) vs. External Static pressure (in. WC.)

0.1

817

1019

1257

1470

0.2

797

995

1210

0.3

773

959

1174

0.4

730

918

1125

0.5

668

869

1076

0.6

620

821

1024

0.7

555

760

959

1420 1366 1312 1259 1196

Temperature Rise vs. External Static Pressure (in. WC.)

1127

0.1

81

65

52

45

0.2

83

66

55

46

0.3

85

69

56

48

0.4

90

72

59

50

0.5

90

76

61

52

0.6

106

80

64

55

0.7

119

87

69

59

Blower Motor Current Draw (Amps) vs. External Static pressure (in. WC.)

3.1

3.9

4.8

5.7

0.2

3.0

3.8

4.6

5.5

0.3

2.9

3.6

4.4

5.4

0.4

2.8

3.5

4.2

5.2

0.5

2.7

3.3

4.1

5.1

0.6

2.6

3.2

4.0

5.0

0.7

2.5

3.1

3.8

4.8

Speed Tap \

Static

Pressure

Low

ML

MH

High

0.1

312

400

513

624

Blower Motor Watts vs. External Static pressure (in. WC.)

0.2

303

390

490

605

0.3

298

381

478

591

0.4

291

366

462

573

=

Recommended operation range

0.5

280

354

447

556

0.6

273

342

432

542

0.7

264

330

413

522

31

All installations and services must be performed by qualified service personnel.

: TURN OFF THE ELECTRICAL POWER to the furnace

before attempting to change blower speed wiring.

The furnace is factory wired to the ignition control with standard heating and cooling speeds. When changing motor speeds, simply switch the needed speed to either the heating or cooling terminal as applicable on the module to obtain the desired CFM. The unused speeds should then be reconnected to the module in the “park” positions. (Refer to figure 15)

Refer to section II for blower speed and air flow performance for A/C installation.

5. FIELD WIRING AND REPLACING WIRING

Field wiring between the furnace and devices not attached to the furnace shall conform with the temperature limitation for Type T 35 C wire. If any of the original factory supplied furnace wiring is replaced or a separate device other than the thermostat is wired internal to the unit 105

°C thermoplastic or equivalent wire must be used.

32

All installations and services must be performed by qualified service personnel.

V. STARTING THE UNIT

A. SEQUENCE OF OPERATIONS

AT ANY TIME THE

GAS VALVE IS

NOT ENERGIZED

START

CONTINUOUS SAFE OPERATION CHECK

IF FLAME SIMULATION CONDITION

PRESENT OR ROLL-OUT SWITCH OPENS, SYSTEM

ENERGIZES INDUCER FAN FOR 15 SECONDS AND CIRCULATOR BLOWER AT

HEATING SPEED UNTIL SITUATION CORRECTION

THERMOSTAT CALLS FOR

HEAT, CONTACTS CLOSE

CONTROL BOARD ENERGIZED,

INDUCER ENERGIZED

PRESSURE SWITCH SENSES

ADEQUATE DIFFERENTIAL PRESSURE,

CONTACTS CLOSE

POWER INTERRUPTION

SYSTEM SHUTS OFF,

RESTARTS WHEN POWER

IS RESTORED.

START

TRIAL

FOR

IGNITION

POWER IS APPLIED TO

THE SILICON NITRIDE

IGNITOR. IGNITOR

WARM-UP IS 20 SECONDS.

AFTER IGNITOR WARM-UP,

THE GAS VALVE IS

ENERGIZED TO OPEN

FLAME MUST BE DETECTED

WITHIN 4 SECONDS IF

FLAME IS DETECTED, THE

DELAY-TO-FAN-ON TIME

BEGINS (45 SECONDS)

IF FLAME IS NOT DETECTED, THE

GAS VALVE IS DE-ENERGIZED,

THE IGNITOR IS TURNED OFF AND

THE CONTROL BOARD CONTROL GOES

INTO "RETRY" SEQUENCE.

33

All installations and services must be performed by qualified service personnel.

MAIN

BURNER

OPERATION

AFTER DELAY-TO-FAN-ON

PERIOD ENDS, CIRCULATING

AIR FAN IS ENERGIZED AT

HEATING SPEED. THE (OPTIONAL)

ELECTRONIC AIR CLEANER

AND HUMIDIFIER ARE

ENERGIZED.

THE RETRY SEQUENCE

PROVIDES A 60 SECOND

WAIT BEFORE IGNITION

RETRY. RETRY IS

ATTEMPTED WITH AN

ADDITIONAL 10 SECONDS

OF IGNITOR WARM-UP

TIME.

CALL

FOR

HEAT

SATISFIED

END

OF CYCLE

WHEN THERMOSTAT IS

SATISFIED, CONTACTS

OPEN AND THE GAS

VALVE IS DE-ENERGIZED.

AFTER PROOF OF FLAME

LOSS, INDUCER STARTS 5 SECOND

POST SURGE AND (OPTIONAL)

HUMIDIFIER ARE

DE-ENERGIZED. THE DELAY-

TO-FAN-OFF PERIOD

BEGINS (120 SECONDS)

IF IGNITION ATTEMPT IS

UNSUCCESSFUL, ONE MORE

RETRY WILL BE MADE

BEFORE THE CONTROL BOARD

GOES INTO SYSTEM LOCKOUT.

IF FLAME IS DETECTED,

THEN LOST, THE CONTROL BOARD

WILL REPEAT THE INITIAL IGNITION

SEQUENCE FOR A TOTAL OF SIX

RECYCLES. AFTER SIX UNSUCCESSFUL

RECYCLE ATTEMPTS, THE CONTROL

WILL GO INTO SYSTEM LOCKOUT.

AFTER THE DELAY-TO-

FAN-OFF PERIOD ENDS,

THE CIRCULATING AIR

FAN AND (OPTIONAL)

ELECTRONIC AIR CLEANER

ARE DE-ENERGIZED.

IF SYSTEM IS IN LOCKOUT, THE

MODULE WILL RESET ITSELF AFTER

60 MINUNTES OR MAY BE MANUALLY RESET BY

INTERRUPTING THE POWER TO THE

FURNACE AT THE DISCONNECT OR INTERRUPTING

THE CALL FOR HEAT AT THE THERMOSTAT.

IF THIS DOES NOT RESTART THE SYSTEM,

REFER TO THE TROUBLESHOOTING

SECTION OF THIS MANUAL.

34

All installations and services must be performed by qualified service personnel.

B. INITIAL START UP:

This furnace does not have a pilot. It is equipped with a hot surface igniter which automatically lights the burner. Do not attempt to light the burner by hand. Check the following items before the initial start-up.

1. Check all wiring for loose connections and proper hook up.

2. Leak test gas piping connections.

3. Check all tubing to the pressure switch and drains to make sure they are connected firmly at all their connection points.

4. Check flue pipe, combustion air inlet and all pvc connections for tightness and to make sure there is no blockage.

5. Make sure air filter is in place.

6. Make sure the outside vent and air intakes are installed according to instructions and that they are free from blockage.

7. Make sure that the drain trap is properly connected to the furnace and to the drain system.

OPERATING INSTRUCTIONS:

: Turn off power to furnace before it is placed into service. The gas piping system must have been leak tested by a qualified heating contractor in accordance with State, Local and National Codes including the National Fuel Gas Code NFPA 54/ANSI-Z233.1 (Latest Edition).

: It may be necessary to purge the air out of the gas line for initial start-up of the furnace after installation. This should be done by a qualified heating contractor. If excessive gas escapes when purging the gas supply at the union, allow the area to ventilate for at least 15 minutes before attempting to start the furnace. LP gas is especially dangerous because the specific gravity of LP gas allows it to accumulate at floor level at a dangerous concentration.

: Heat exchanger oil will burn off on initial firing creating an unpleasant odor. To prevent this odor from occurring more than once, it is suggested that:

1. A window(s) be opened.

2. The thermostat set at highest setting.

3. The furnace remain running as noted above for 15 minutes or until odor

has dissipated.

35

All installations and services must be performed by qualified service personnel.

C. ADJUSTMENT OF BTU INPUT RATE:

The orifice for this furnace was sized: 1) for natural gas having a heating value of

1025 BTU per cubic foot and a specific gravity of .65, or 2) for liquefied propane gas with a heating value of 2500 BTU per cubic foot and a specific gravity of

1.55. The information plate inside the furnace vestibule will specify which gas your furnace is orificed for. If the furnace is installed at an altitude that is more than 2,000 feet above sea level, it is mandatory that the input to the burner be reduced 4.0% for every 1,000 feet that it is above sea level. If the furnace is installed at an elevation of 5,000 feet, its input must be reduced 20.0%. Example: a furnace rated at 75,000 BTU at sea level must be reduced to a firing rate of

60,000 (75,000 x .80 = 60,000) at an elevation of 5,000 feet. If the furnace is installed at an elevation of 2,000 feet or less, no reduction in input is required.

Your gas supplier or Style Crest will supply you with the correct orifice sizing information.

To check the input of your natural gas furnace, allow the unit to operate for 10 to

15 minutes and proceed as follows:

1. Call your gas supplier and ask for the BTU content (heating value) of one cubic foot of the gas, supplied to the installation area. An alternate approach is to assume a value of 1025 BTU/Cu Ft which is the national average.

2. With all other gas appliances turned off and using a stopwatch, clock the time required for the (small) dial on the gas meter to make one full revolution. The meter dial will state the cubic feet of flow for one revolution usually one, two or five.

FORMULA: BTU/Cu Ft x Number of Cu Ft x 3600 Seconds = Input BTU/hr

Seconds for one revolution

EXAMPLE: 1025 BTU/Cu Ft x 2 Cu Ft x 3600 = 73,505 BTU Input

100.40 Seconds

Check the model number of the furnace, the input rate, the type of gas, and the manifold pressure on the rating label located in the burner vestibule. If using the above example, the furnace is a VMA1-75N model and the input rate is 73,505 BTU/hr. The input rate would be acceptable because it was within + 2% of the listed input of 75,000.

3. Make sure that the gas supply pressure to the furnace is within the allowable range of 5.5" to 14" WC pressure on natural gas and 11.0" to

14.0" WC on propane gas. The pressure to the furnace must be checked while the furnace burner and any other gas appliances on the same supply system are operating, using the 1/8 in. NPT manifold pressure tap.

36

All installations and services must be performed by qualified service personnel.

GAS PRESSURE CHART FOR VMA* MODEL FURNACES

SUPPLY PRESSURE MANIFOLD PRESSURE

NAT

MAX 14” WC

MIN 4.5” WC

3.5 + .3” WC

PROPANE

MAX 14” WC

MIN 11” WC

10.0” + .3” WC

TABLE 3

This gas furnace is equipped with a fixed orifice sized for the manifold pressure shown on the rating label. The input can only be increased, or decreased, by adjusting the manifold pressure. Remove the 1/8" threaded pipe plug located on the gas manifold.

Use a U tube manometer or recently calibrated pressure gage to measure the pressure. To adjust the pressure, remove the screw cap from the regulator on the gas valve and using the adjustment screw. Decrease the pressure by turning the screw counterclockwise or increase it by turning the screw clockwise.

: ADJUSTMENTS TO THE LISTED PRESSURE MUST NOT

EXCEED 0.3" WC. A 0.3" WC adjustment will increase or decrease the input approximately 4.0%.

Replace screw (cap) when adjustment is complete.

The correct input can be assumed if the furnace manifold pressure is the same as that shown on the rating label if a gas meter is not available for natural gas or the unit is installed on an unmetered propane gas supply.

Shut off the gas supply to the furnace. Remove the pressure gage and reinstall the pipe plug using a thread compound resistant to the action of LP gases.

If the rated input cannot be obtained with the present orifice at the correct pressure, your local gas supplier may assist in sizing the proper orifice.

Style Crest will gladly assist in sizing the orifice if you provide them with the heating value in BTU per cubic foot and the specific gravity of the fuel gas.

D. BURNER ADJUSTMENT

This unit is designed to not require any burner adjustment. The flames should be checked by looking through the sight glass located on the burner box. Burner

37

All installations and services must be performed by qualified service personnel.

flames should be clear, blue and almost transparent in color. (see Figure 16).

NOTE: It is not unusual to have orangish flames visible in the tube for LP gas.

Figure 16.

:

The VMA furnace models are direct vent design and do not require an air shutter adjustment (air shutters are not used) for proper flame characteristics. Burner box access cover must always be secured

with all screws in place and tightened before operating furnace.

E. SETTING TEMPERATURE RISE

All VMA Models are designed and wired at the factory for a heating blower speed that should result in an approximate temperature rise of 60

°F. The blower motors are wired on med-low speed for heating mode. The temperature rise through the furnace may vary depending on the duct system, elevation, heating value, etc. for each installation. A lower temperature rise will result in a higher efficiency.

Temperature rise = supply air temperature - return air temperature.

After 10 to 15 minutes of continuous operation, the temperature rise through the furnace must fall within a range of 40

°F to 70°F. If the outlet or supply duct temperature is too high, you should check to make sure that your return air filter is clean, your return air openings are free from obstruction, your outlet registers are properly adjusted and clear and your supply and return air ducts are open.

The circulating air blower is not moving enough air if the supply air temperature is still too high. Before proceeding further, turn off the power supply to the furnace and remove the front door of the unit.

The speed of the blower must be increased by changing the speed tap from the motor (see figure 15). This is accomplished by locating the control panel attached to the blower housing and switching the blue (med. low) blower lead, which should be connected to the “Heat” terminal on the White-Rodgers 50A65-143

38

All installations and services must be performed by qualified service personnel.

control, with one of the higher speed blower leads attached to a terminal marked

“Park”. Be sure to attach any unused blower leads to a terminal marked “Park”.

Replace the blower door and turn on the power supply.

F. FURNACE CHECKOUT PROCEDURE

Before any system of gas piping is finally put into service, it shall be carefully tested to assure that it is gas tight as indicated in the Fuel Piping Section of this

Furnace Manual.

NOTICE: All controls on the unit should be checked for proper functioning prior to the qualified service personnel leaving the job site. Specifically the following should be checked:

With furnace in normal heating operation, check to make certain blower will start and stop automatically under control of integrated fan control.

1. Check safety limit control as follows: a. Shut off incoming power. b. Block return air opening or disconnect blower motor leads. c. Restore power to furnace. d. Set thermostat above room temperature calling for heat. e. When temperatures are reached in furnace at limit control setting with

blower out of operation, burner should shut off. f. Shut off electrical power.

IMPORTANT: Remove blockage or reconnect blower motor and restore power.

2. Make certain thermostat will automatically start and stop furnace.

3. Block the flue pipe outlet gradually with a flat piece of metal, until the pressure switch functions shutting off the main burners. IMPORTANT: Remove flue outlet blockage when done.

4. Block the PVC pipe inlet gradually with a flat piece of metal until pressure switch functions shutting off the main burners. IMPORTANT: Remove air inlet blockage when done.

5. Remove the blower compartment access door with the furnace operating. The door interrupt switch is in the 120 volt circuit and will shut down the entire system. Replace the blower door and the furnace start-up cycle will begin.

39

All installations and services must be performed by qualified service personnel.

VI. INSTALLER'S INSTRUCTIONS TO USER:

After completing the installation, the installer shall inform and/or demonstrate to the homeowner:

1. The location of all the instructions in the furnace and that the instructions must be kept along with instructions for any accessories in the plastic pouch.

2. The location and use of the manual gas shut off valve and furnace electrical disconnect switch. Instruct user to always shut off gas before shutting off electric power.

3. The sequence of operation of the furnace.

4. The correct operation and maintenance of the appliance as outlined in this manual.

5. That failure to maintain and operate this furnace in accordance with these instructions could result in hazardous conditions, bodily injury, property damage and may void the limited warranty on the furnace.

6. Review with and encourage the user to read the label reproductions and all warnings and instructions in this manual.

7. Recommend that the user have a qualified heating contractor inspect the furnace at the start of each heating season. Inform the user of the frequency of inspection required for each component.

8. Should the furnace not operate after installation – note diagnostic code through view port prior to removing door.

VII. DEALER MAINTENANCE

The following maintenance procedures should be performed at the beginning of each heating season by a qualified heating contractor. Correct any

deficiencies at once.

: Personal injury or property damage could result from repair or service of this furnace by anyone other than a qualified heating contractor.

: To avoid injury from moving parts, shut off the power to the furnace before removing blower compartment door.

:

Label wires prior to disconnection when servicing controls. Wiring

errors can cause improper and dangerous operation.

40

All installations and services must be performed by qualified service personnel.

A. ELECTRICAL:

1. Check diagnostic code through view port prior to removing access door.

2. Check all wiring for loose connections and any signs of damage or unusual wear.

3. Check for correct voltage at the furnace when operating.

4. Check amp-draw on blower motor and inducer motor to assure they are not

exceeding name plate amp rating.

5. Check for correct operation and proper settings (if manually adjustable) of all controls.

Shut off gas and disconnect power before continuing.

B. GENERAL INSPECTION

1. VENT PIPE COMBUSTION AIR INTAKE

a. Remove the vent and check the vent for signs of carbon build-up and for signs of blockage. b. The entire length of vent and combustion air inlet pipe and their terminations should be inspected for restrictions, loose or loosely sealed joints, carbon build-up. Also inspect the outside vent and combustion air terminals and ensure that they are clear and unobstructed.

2. CONDENSATE LINE/TRAP ASSEMBLY

The condensate line must be inspected to make sure it is not blocked. All of the lines should be flushed with water to remove any build-up of sediment.

3. BURNERS

If it appears that material is accumulating in the burner box, the burner box cover can be removed and the box and burners can be vacuumed. (NOTE: The igniter

& flame sensor must be removed before removing the assembly.) If necessary, the burners assembly can be removed by taking out the two screws/one on each bracket on the bottom of the box on VMA’s or on top of the box and removing the burner drawer assembly. Assembly must be pulled & tilted away from the blower compartment in order to remove from box. If necessary, the individual tubes can be cleaned out using compressed air to blow out the individual tubes. Care must be taken not to damage the igniter.

4. INDUCER BLOWER ASSEMBLY

Inspect the pressure switch and drain tubing connections and inspect the blower/assembly for warpage, deterioration and carbon or other build-up. If necessary, clean the accessible portions of the housing and blower with a damp cloth. Vacuum to remove any lint or dust from the motor assembly.

41

All installations and services must be performed by qualified service personnel.

5. GASKETS/SEALING MATERIALS

Inspect all visible gaskets for signs of degradation or liquid seepage, especially any seals which were removed as part of the inspection. Replace any suspect gaskets.

C. HEAT EXCHANGER

Inspect for corrosion, pitting, warpage, deterioration, carbon build-up and loose gaskets in the flue pipe, burner box and accessible areas of the heat exchanger.

1. CLEANING THE COIL AIR SIDE

a. Remove the blower from the blower compartment. In order to remove the blower, it will first be necessary to disconnect the furnace from the outside power supply and disconnect the blower wire harness from the furnace at the blower pan quick connect. b. Clean the coil with a vacuum cleaner by going through the blower pan opening being careful not to bend or damage any of the fins. c. Once all components are cleaned, they must be re-installed to their factory produced state. Any seals or joints in the flue system which have been removed or loosened must be reconnected and sealed if necessary. Do this in accordance with the installation instructions.

:

The inducer motor mounting plate gasket and the collector box

gasket must be replaced.

D. HOUSE AIR BLOWER

Check and clean the blower wheel, housing and compartment with a vacuum.

Check the motor name plate and follow the motor manufacturers instructions for lubrication, if required.

IMPORTANT: Some motors are permanently lubricated and should not be

oiled. See motor name plate for specific instructions.

E. RETURN AIR FILTER

The Return Air Filter(s): Provided with this unit is a permanent type filter. This filter(s) should be inspected and when dirty, cleaned or replaced, if necessary to assure proper furnace operation. Follow the cleaning, removal and replacement procedure below.

42

All installations and services must be performed by qualified service personnel.

FILTER MAINTENANCE PROCEDURE

The filter is located inside front door of the VMA. Remove filter retaining rod and remove dirty filter. Clean the filter by vacuuming, rinsing with tap water, hosing or dipping in an ordinary detergent solution. After cleaning, replace the completely dry filter and retain with retaining rod. If the filter has a mesh, the mesh side of the filter must be towards the furnace.

FILTER REPLACEMENT

Should the filter require replacement, replace with like size and type filter as originally supplied with furnace.

IMPORTANT: Remind homeowner of importance of monthly filter inspections during the heating season to ensure efficient and trouble-free operation of their furnace.

VIII. TROUBLESHOOTING

NOTICE: BEFORE TROUBLESHOOTING, FAMILIARIZE YOURSELF WITH THE

START UP AND CHECKOUT PROCEDURE.

ALL INSTALLATION AND SERVICES MUST BE PERFORMED BY QUALIFIED

HEATING CONTRACTORS.

To assist you in troubleshooting this furnace, it is equipped with an integrated ignition control with diagnostics. These diagnostics evaluate what control system has experienced a failure and will activate a flashing light on the control in different sequences to help pinpoint the failure which has occurred.

Note – check diagnostic code through view port prior to removing access door.

DIAGNOSTIC FEATURES

The 50A65 control used on this furnace continuously monitors its operation and the operation of the system. If a failure occurs, the LED light on the control will flash a code. If the failure is internal to the control, the light will stay on continuously.

In this case, the entire control should be replaced, as the control is not fieldrepairable.

If the sensed failure is in the system (external to the control), the LED will flash in the following flash-pause sequences to indicate failure status (each flash will last approximately 0.25 seconds, and each pause will last approximately 2 seconds).

1 flash, then pause

2 flashes, then pause system locked pressure switch stuck closed

43

All installations and services must be performed by qualified service personnel.

3 flashes, then pause

4 flashes, then pause

6 flashes, then pause

7 flashes, then pause

8 flashes, then pause pressure switch stuck open open high limit switch

115 volt AC power reversed low flame sense signal check ignitor or improper grounding

Continuous flashing

(no pause)

Flame has been sensed when no flame should be present

(no call for heat)

The LED will also flash once at power-up.

: Power must be disconnected before servicing.

44

All installations and services must be performed by qualified service personnel.

TROUBLESHOOTING GUIDE

THE SYSTEM IS STARTED BY SETTING THE THERMOSTAT TO CALL FOR

HEAT. THE FOLLOWING SHOULD HELP ESTABLISH THE TYPE OF

MALFUNCTION OR DEVIATION FROM THE NORMAL OPERATION.

TO USE THIS DIAGRAM, YOU JUST NEED TO FOLLOW THE INSTRUCTIONS IN THE BOXES.

NOTE: CHECK DIAGNOSTIC CODE THROUGH VIEW PORT PRIOR TO REMOVING ACCESS DOOR.

TURN THERMOSTAT TO CALL FOR HEAT

DOES THERMOSTAT MAKE CONTACT?

Yes

Yes

No

No

IS ROOM

TEMPERATURE

ABOVE 90 DEGREES F?

No

IS ROOM TEMPERATURE

BELOW THERMOSTAT

SETTING?

TURN T'STAT

SETTING ABOVE

ROOM TEMP.

Yes

Yes

COOL THE THERMOSTAT

IS THE TRANSFORMER

SUPPLYING 24 VOLTS

TO THE THERMOSTAT?

No

ARE WIRES CONNECTED

PROPERLY?

Yes

REPLACE

THERMOSTAT

Yes

IS INTERNAL DAMAGE

PRESENT ON THE

TRANSFORMER?

No

No CORRECT WIRE

CONNECTIONS

CHECK INPUT

POWER, DOOR

INTERLOCK,

SERVICE SWITCH

AND FUSES.

Yes

REPLACE TRANSFORMER

IS THE INDUCER

BLOWER OPERATING?

Yes

No

IS THERE 24 VOLTS

ACROSS "TH" & "TR"

AT THE INTEGRATED

CONTROL MODEL?

Yes

No CHECK FOR

CONTINUITY

& PROPER

CONNECTIONS

45

All installations and services must be performed by qualified service personnel.

Yes

Yes

IS THERE LINE VOLTAGE

ACROSS INDUCER POWER

TERMINALS "IND" & "IND N"

AT THE INTEGRATED CONTROL?

Yes

CHECK WIRING TO INDUCER

AND IF OK, REPLACE

INDUCER ASSEMBLY.

No CHECK THE INTEGRATED

CONTROL DIAGNOSTIC LED

LAMP. RESET BY INTERRUPTING

POWER TO CONTROL FOR MORE

THAN ONE SECOND. IF LED STAYS

ON CONTINUOUSLY, REPLACE

INTEGRATED CONTROL.

DOES THE HOT

SURFACE

IGNITOR ENERGIZE

AND GLOW?

Yes

No IS THERE VOLTAGE PRESENT

AT THE HOT SURFACE

IGNITOR TERMINALS

"IGN" & "IGN N" AT THE

INTEGRATED CONTROL?

Yes

CHECK WIRING TO

HOT SURFACE IGNITOR

AND IF OK, REPLACE

HOT SURFACE IGNITOR ASSEMBLY.

No

CHECK THE INTEGRATED CONTROL

DIAGNOSTIC LED LAMP. RESET BY

INTERRUPTING POWER TO CONTROL

FOR MORE THAN ONE SECOND. IF

LED STAYS ON CONTINUOUSLY,

REPLACE INTEGRATED CONTROL.

AFTER HOT SURFACE

IGNITOR WARM-UP,

DOES GAS VALVE OPEN?

No

CHECK ACROSS "MV"

TERMINALS ON INTEGRATED

CONTROL FOR 24 VOLTS DURING

THE 4 SECOND FLAME PROVING

PERIOD AFTER IGNITOR WARM-UP.

IS THERE 24VOLTS?

Yes

Yes

CHECK WIRING TO GAS

VALVE AND IF OK,

REPLACE GAS VALVE.

No

SAME AS ABOVE.

46

All installations and services must be performed by qualified service personnel.

Yes

AFTER GAS VALVE

OPENS, DO THE

BURNERS IGNITE?

No CHECK FOR PROPER

MANIFOLD PRESSURE.

Yes

Yes

ADJUST TO 3.5" FOR NATURAL GAS

IS IGNITOR

POSITIONED CORRECTLY?

No

OR 10.0" WC FOR LP GAS

REPOSITION TO

CORRECT LOCATION.

DO BURNERS STAY

LIT PAST PROOF

OF FLAME CHECK?

Yes

DOES THE INTEGRATED CONTROL

ENERGIZE THE

CIRCULATING AIR BLOWER

AFTER THE 45 SECOND

TIME DELAY.

No

CHECK ACROSS THE

CIRCULATING AIR

BLOWER TERMINALS

"CIR N" & "HEAT"

FOR PROPER VOLTAGE.

No

REPLACE THE

INTEGRATED CONTROL.

Yes

DOES THE CIRCULATING

AIR FAN COME ON

WHEN ENERGIZED?

Yes

No

DOES BLOWER

SPIN FREELY?

Yes

IS CAPACITOR

WORKING PROPERLY

No

CONFIRM IF

EITHER BLOWER WHEEL

IS RUBBING AGAINST

HOUSING OR MOTOR

SHAFT IS SPINNING

FREELY AND REPAIR

OR REPLACE AS NECESSARY.

Yes

REPLACE MOTOR

No

REPLACE CAPACITOR

47

All installations and services must be performed by qualified service personnel.

Yes

DOES SYSTEM RUN UNTIL

THERMOSTAT IS SATISFIED?

Yes

DOES BURNER SHUT OFF

WHEN THERMOSTAT IS

SATISFIED?

Yes

DOES THE CIRCULATING

AIR BLOWER TURN OFF

AFTER THERMOSTAT IS

SATISFIED WITHIN

120 SECONDS?

No

IS LED LIGHT

ON INTEGRATED

CONTROL FLASHING?

Yes

No

No

CHECK FOR SHORT IN WIRE TO

THERMOSTAT AND CORRECT

IF NECESSARY.

CHECK ALL

WIRING FOR

LOOSE CONNECTIONS.

Yes

48

All installations and services must be performed by qualified service personnel.

Yes Yes

TROUBLESHOOTING COMPLETE.

IF LED LIGHT FLASHES:

1 FLASH, THEN PAUSE SYSTEM LOCKOUT

2 FLASHES, THEN PAUSE PRESSURE SWITCH STUCK CLOSED

3 FLASHES, THEN PAUSE PRESSURE SWITCH STUCK OPEN

4 FLASHES, THEN PAUSE OPEN LIMIT SWITCH OR ROLLOUT SWITCH

6 FLASHES, THEN PAUSE 115 VOLT AC POWER REVERSED

7 FLASHES, THEN PAUSE LOW FLAME SENSE SIGNAL

8 FLASHES, THEN PAUSE CHECK IGNITOR OR IMPROPER GROUNDING

CONTINUOUS FLASHING FLAME HAS BEEN SENSED WHEN

(NO PAUSE) NO FLAME SHOULD BE PRESENT

(NO CALL FOR HEAT)

CHECK COMPLETE SYSTEM OUT.

THE LED WILL ALSO FLASH ONCE AT POWER-UP.

LED LIGHT STAYS ON CONTINUOUSLY,

COMPLETE FAILURE - REPLACE

INTEGRATED CONTROL.

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All installations and services must be performed by qualified service personnel.

APPENDIX – A REPLACEMENT PARTS

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All installations and services must be performed by qualified service personnel.

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All installations and services must be performed by qualified service personnel.

APPENDIX – B WIRING DIAGRAM

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All installations and services must be performed by qualified service personnel.

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