9. Check thermocouple connection,
and replace if defective.
10. Eliminate drafts. Refer to
"Installation".
11. Inspect and correct all wiring.
12. Inspect and correct ignition system
wiring. See symptoms W,X,& Y.
13 Replace.
1. Check and tighten all wiring connec-
tions per diagrams. Thermostat wires
tagged "W" and "G" must be connect-
ed together (unless special thermo-
stats are used; if so, see thermostat
wiring diagram). See electrical
connections.
2. Replace motor.
3. Check for 24V across H terminals
on fan time delay switch. If 24V is
present, jumper terminals numbered
1 and 3. If motor runs, the fan switch
is defective and must be replaced. If
24V is not present, check wiring per
diagrams.
1. Be sure fan switch heater terminals
are connected per diagrams.
2. Replace fan switch.
3. Check motor amps against motor
name plate rating, check voltage,
replace fan motor if defective.
4. Refer to label on motor.
1. Check all wiring.
2. Refer to H & N symptoms.
3. Replace fan switch.
1. Refer to "Operation".
2. This is especially true when the
heated space is enlarged. Have the
heat loss calculated and compare to
the heater output (80% of input).
Your gas supplier or installer can
furnish this information. If heater is
undersized, add additional heaters.
3. Replace thermostat.
4. There should be NO ducts attached
to the front of this heater. Check air
movement through heat exchanger.
Check voltage to fan motor. Clean
fan blade and heat exchanger and oil
fan motor.
1. Replace thermostat.
2. Check wiring per diagrams; Check
operation at valve. Look for short
(such as staples piercing thermostat
wiring), and correct; Replace gas
valve; Refer to "Operation".
1. Be sure fan switch heater terminals
are connected per diagrams.
Troubleshooting Guide
SYMPTOMS
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
20
9. Defective thermocouple
(standing pilot units only).
10. Drafts around unit.
11. Pilot valve not opening (faulty
wiring).
12. No spark (if applicable) (faulty
wiring).
13. Defective gas valve.
1. Loose wiring.
2. Defective motor overload protector
or defective motor.
3. Defective fan switch.
1. Fan switch heater element improperly
wired.
2. Defective fan switch.
3. Motor overload protector cycling on
and off.
4. Motor not properly oiled.
1. Improperly wired fan control.
2. Main burners not lighting while
thermostat calls for heat.
3. Defective fan switch.
1. Incorrect gas input.
2. Heater undersized.
3. Thermostat malfunction.
4. Heater cycling on limit control.
1. Thermostat malfunction.
2. Heater runs continuously.
1. Fan switch heater element improperly
wired.
O. Fan will not run.
P. Fan motor turns on and off
while burner is operating.
Q. Fan motor will not stop.
R. Not enough heat.
T. Too much heat.
U. Cold air is delivered on start
up.
Содержание M)
Страница 24: ......
