START-UP PROCEDURES
1. Self-test—The furnace features a self-test system to help
diagnose a system problem in the case of a component failure.
Two test pins (ST-1 and ST-2) are located in the lower
right-hand corner of the control board as shown in Fig. 9. To
initiate the self-test procedure, momentarily short across the 2
pins for approximately 0.5 sec.
ELECTRONIC
AIR CLEANER
TERMINALS
(115 VAC, 1 AMP MAX)
3-AMP FUSE
HUMIDIFIER TERMINAL-
24-VOLT THERMOSTAT
TERMINALS
BLOWER OFF-DELAY
ADJUSTMENT CONTROL
SELF-TEST PINS
A91060
Fig. 9—Control Center
NOTE: The self-test feature does not operate if the control board
is receiving any thermostat signals.
The self-test sequence is as follows:
a. The furnace control checks itself and operates the inducer
motor for 10 sec, then stops.
b. The hot surface ignitor is energized for 15 sec, then is
de-energized.
c. The humidifier relay is energized for 10 sec, then de
energized.
d. The blower motor operates on cooling speed for 10 sec,
then stops.
e. The blower motor operates on heating speed for 10 sec,
then stops.
2. Purge gas lines — After all connections have been made, purge
the lines and check for leaks.
Д WARNING
Never purge a line into a combustion chamber. Never use.
matches, candles, flame or other sources of ignition for the
purpose of checking leakage. Use a soap-and-water solution
to check for leakage. Failure to follow this warning can cause
a fire, explosion, personal injury, or death.
3. To operate furnace, follow procedures on operating instruc
tions label attached to furnace.
4. With furnace operating, set thermostat below room tempera
ture and observe that furnace goes off. Set thermostat above
room temperature and observe that furnace restarts.
ADJUSTMENTS
1. Set gas input rate.
There are 2 methods of adjusting the gas input rate. The
preferred method is by using Table 6 and following instruc
tions in item a. The second method is by clocking the gas
meter and following instructions in item b.
The gas valve regulator has been nominally set at 3.5-in. wc
for natural gas. When adjusting input rate, do not set manifold
pressure above 3.8- in. wc or below 3.2-in. wc.
a. Check gas input rate using Table 6.
(1.) Obtain average yearly heat value for local gas supply.
(2.) Obtain average yearly specific gravity for local gas
supply.
(3.) Verify furnace model. Table 6 can only be used for
Model 58PAV Furnaces.
(4.) Check and verify orifice size in furnace. NEVER
ASSUME THE ORIFICE SIZE. ALWAYS CHECK
AND VERIFY.
(5.) Find natural gas heat value and specific gravity in
Table 6.
(16 Seiten)
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