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12428-3-0706 Page 8
Vent Safety Shutoff System
This appliance must be properly connected to a venting system. This
appliance is equipped with a vent safety shutoff system.
This furnace is equipped with a manual reset vent safety switch. The
manual reset vent safety switch will cause gas flow to the main burners
to “shut off” due to improper venting or a blocked flue.
To reset the manual reset vent safety switch:
1. Remove upper front panel.
2. Depress red manual reset button. The manual reset vent safety switch
is located on the draft diverter.
3. Replace upper front panel.
If the manual reset vent safety switch continues to “shut off” the gas
flow to the main burners a qualified service person must be contacted to
inspect for improper venting, blockage in the vent pipe or the manual
reset vent safety switch for being defective.
Figure 9 Figure 10
SERVICE AND MAINTENANCE SUGGESTIONS
CALL SERVICEMAN
GENERAL: All furnaces have been fire-tested to check for proper
operation. This includes, main burner flame, pilot flame, fan operation,
fan control, limit control and automatic valve operation. If the furnace
fails to function on initial installation, it is advisable to re-check the
following:
1. 115 volts to the junction box.
2. Inlet gas pressure.
3. The 24 volt system
4. Type of gas being used and that shown on the rating label.
The Service Department at Empire Comfort Systems, Inc. may be contacted
to assist in servicing furnace.
Servicing the Pilot and Main Burners, Pilot Orifice, Thermocouple,
and Main Burner Orifices: Disconnect the gas supply at the inlet to the
control valve. Then remove the burner door to which the above compo
-
nents are attached.
Servicing The Fan Motor: The upper front panel the shroud surround-
ing the fan blade and fan blade must be removed. See “oiling the Motor”
paragraph on page 7.
Spark Igniter Does Not Light Pilot: With air in the gas line, such as when
the furnace is first installed or was off all summer, the pilot flame may
be too lean to ignite on the first few trials. Turn the control valve knob to
pilot position and depress the red reset button. Holding the button down
continually to bleed the line;
1. Use lighter rod to light pilot with a match.
2. Use the piezo ignitor at 30 second intervals until it lights.
If Electrode Does Not Produce Spark
1. Check wire connections.
2. Check gap for pilot burner to the electrode tip. Should be between
1/8” (3mm) and 3/16” (5mm). Electrode wire and tip must be more
than 1/4” (6mm) away from all other metal components.
If Pilot Does Not Light By Any Means:
1. Check valve knob for being in the “Pilot” position.
2. Check pilot adjustment for being full open (counterclockwise to
open).
3. If gas is available in the supply tubing, the pilot orifice and/or pilot
burner is probably restricted by a spider web. Clean pilot assembly
and relight.
If Pilot Does Not Remain On After Releasing Knob:
1. Follow instructions and hold button down longer and harder.
2. Determine if pilot flame extends past thermocouple; if not, adjust
input or clean pilot burner.
3. Replace thermocouple if millivolts read less than 15 millivolts.
Main Gas Valve Does Not Open When Thermostat is Turned To On:
1. Check for 24 volts to valve by removing one wire and touch to the
SAME TERMINAL it was on. Terminal should have a light spark.
DO NOT SHORT ACROSS TERMINALS, AS IT WILL BURN
OUT THE WALL THERMOSTAT.
2. Thermostat wires at the wall may be shorted, so check for a faulty
thermostat.
3. To check for line voltage to furnace, remove lower front panel and
switch compartment cover and short across two-terminal fan control
to allow fan to operate (Figure 9).
Warning: Operation of this wall furnace when not connected to
a properly installed and maintained venting system or tampering
with the vent safety shutoff system can result in carbon monox
-
ide (CO) poisoning and possible death.
CAUTION: Label all wires prior to disconnection when servic-
ing controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.