MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 7
Starting the Furnace
1. STOP! Read the safety information above.
2. Set the thermostat mode to “OFF”.
3. Turn o the electric power to the furnace.
4. Remove the furnace access panel.
5. Move the gas control switch to the “OFF” position. Do not
force it. See Figure 4 for the switch location.
6. Wait 5 minutes to clear out any gas. If gas is smelled, follow
Step 2 in the safety information above. If there is no gas
smell, go to Step 7 below.
7. Move gas control switch to the “ON” position. Do not force it.
See Figure 4 for the switch location.
8. Replace the burner access panel.
9. Turn on electrical power to the furnace.
10. Set the thermostat mode to “HEAT” and the temperature
setting above the room temperature. Burner will typically
light after 30-60 seconds, but it may take multiple tries due to
air in the gas line. The furnace will attempt to light the burner
3 times before it will lock out for 1 hour at which time it will try
to light again.
11. If the furnace will not light, follow the instructions “Shutting
the Furnace O” below.
Shutting the Furnace O
1. Set the thermostat mode to “OFF”.
2. Turn o the electrical power to the furnace if service is to be
performed.
3. Remove furnace access panel.
4. Move gas control switch to the “OFF” position.
5. Replace burner access panel.
The Furnace Fails to Operate Properly
If any abnormalities are observed while the furnace is operating,
perform the following checks:
1. Check the setting on the thermostat to make sure the
thermostat is set above the room temperature.
2. Check to see if the electrical power is turned on at the circuit
breakers at the main electrical panel (circuit breaker box) or
check any on/o switches that may be used for service
disconnect switches.
3. Make sure the air lters are clean, return grilles are not
obstructed, and supply air registers are open.
4. Make sure the control switch on the gas valve is in the
“ON” position. Refer to Figure 4 for the gas valve control switch
location.
5. Make sure the gas cock or valve shown in Figure 5 is in the
“ON” position.
If the cause of the malfunction is not obvious, do not attempt
to repair the furnace. Call a qualied service agency to repair
the furnace.
Should overheating occur, turn the gas cock or gas valve
in the gas supply line to the “OFF” position. After the
furnace has cooled o, turn the circuit breakers in the main
electrical panel (circuit breaker box) to the “OFF” position.
Call a qualied service personal to troubleshoot and repair
the furnace. Do not allow the furnace to continue to cycle
on the overtemperature limit switches.
Figure 4: White Rodgers Gas Valve Components
Figure 5: Gas Supply Piping & Shuto Valve Location
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