10.Clean flame sensor with fine steel wool
11.Remove old sealant from center panel and collector box flange and apply new sealant to collector box flange and reinstall on center panel, making sure all 8 screws are secure.
NOTE: A releasing agent such as PAM cooking spray or equiva- lent (must not contain corn or canola oil, aromatic or halogenated hydrocarbons or inadequate seal may occur) and RTV sealant (G.E. 162, 6702, or
12. Reinstall relief box and inducer assembly.
NOTE: If inducer assembly gasket is damaged, use RTV sealant to seal inducer assembly to collector box.
13.Reconnect wires to the following components:
a.Blocked vent safeguard switch.
b.Inducer motor.
c.Pressure switch.
d.Limit overtemperature switch(es).
e.Gas valve.
f.Hot surface ignitor.
g.
h.Flame rollout switch(es), if applicable.
14.Reinstall vent connector to furnace flue collar. After fully assembling vent connector to furnace flue collar, securely fasten vent connector to flue collar with 2
15.Turn electrical power and gas to ON.
16.Set thermostat and check furnace for proper operation.
17.Verify blower airflow and speed changes between heating and cooling.
18.Check for gas leaks.
Never use a match or other open flame to check for gas leaks. Use a
19. Replace control door.
Step 4ÐElectrical Controls and Wiring
There may be more than 1 electrical supply to unit. Check accessories and cooling unit for additional electrical supplies.
The electrical ground and polarity for
NOTE: If the polarity is not correct, the STATUS LED on the control will flash rapidly and prevent the furnace from heating. The control system also requires an earth ground for proper operation of the control and
The
With power to the unit disconnected, check all electrical connec- tions for tightness. Tighten all screws on electrical connections. If any smoky or burned connections are found, disassemble the connection, clean all parts, strip wire, and reassemble properly and securely.
Reconnect electrical power to the unit and observe unit through 1 complete operating cycle. Electrical controls are difficult to check without proper instrumentation; if there are any discrepancies in the operating cycle, contact your dealer and request service.
The control in this furnace is equipped with an LED status light to aid in installation, servicing, and troubleshooting. It can be viewed
FIELD
FIELD
FACTORY
FACTORY
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| NOTE 2 |
| THERMOSTAT |
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| FIVE WIRE |
| W C R | G Y | ||
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| TERMINALS | ||||
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| DISCONNECT | |
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| 208/230- OR | ||
BLOWER DOOR SWITCH |
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| THREE |
BLK | BLK |
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| W |
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| PHASE |
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WHT | WHT |
| C | R |
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| N |
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| GND | GND | T |
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| SINGLE |
AUXILIARY | R | G |
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| PHASE | ||
O |
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| SUPPLIED | L | C |
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| GND | |
DISCONNECT |
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| NOTE 1 |
| CONDENSING | ||
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| Y |
| UNIT |
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| WIRE |
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| FURNACE | NOTES: 1. | Connect | |||
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| 2. Some thermostats require a "C" terminal connection as shown. | |||||
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3. If any of the original wire, as supplied, must be replaced, use same type or equivalent wire.
A98521
Fig. 5±Heating and Cooling Application Wiring Diagram
5