Operating instructions

B. Check Pressure Switch
This control proves operation of draft inducer. Check switch
operation as follows:
1. Turn off 115-v power to furnace.
2. Remove main furnace door and disconnect inducer motor
lead wires from wire harness.
3. Turn on 115-v power to furnace.
4. Set thermostat to call for heat and wait 1 minute. When
pressure switch is functioning properly, hot surface igniter
should NOT glow, and control status code LED light
flashes a Status Code 31. If hot surface igniter glows when
inducer motor is disconnected, shut furnace down immedi-
ately. Determine reason pressure switch did not function
properly and correct condition.
5. Turn off 115-v power to furnace.
6. Reconnect inducer motor leads, reinstall main furnace door,
and turn on 115-v power supply.
VI. CHECKLIST
1. Put away tools and instruments. Clean up debris.
2. Verify flame-rollout manual reset switch has continuity.
3. Verify that blower and main access doors are properly
installed.
4. Cycle test furnace with room thermostat.
5. Check operation of accessories per manufacturer’s instruc-
tions.
6. Review User’s Guide with owner.
7. Leave literature packet near furnace.
TABLE 14—BLOWER OFF DELAY SETUP POSITION
PINS 1 AND 2 2 AND 3 3 AND 4 4 AND 5
Time (in sec) 90 120 150 180
Fig. 60—Amp Draw Check with Ammeter
A80201
R Y W G
10 TURNS
THERMOSTAT SUBBASE
TERMINALS WITH
THERMOSTAT REMOVED
HOOK-AROUND
VOLT/AMMETER
EXAMPLE:
5.0 AMPS ON AMMETER
10 TURNS AROUND JAWS
= 0.5 AMPS FOR THERMOSTAT SETTING
FROM UNIT 24-VOLT
TERMINAL BLOCK
—47—