the floor. If you smell gas, STOP! Follow “B” in the safety information above on this furnace label. If you don’t smell gas, go to the next step.
•If a suspected malfunction occurs with your gas control system, such as the burners not lighting when they should, refer to the shutdown proce- dures on inside of main furnace door, or in the “Shutting Down Your Fur- nace” section and call your dealer as soon as possible.
!WARNING
If overheating occurs or the gas valve fails to shut off the gas supply, turn off the exter- nal manual gas valve to the furnace BEFORE turning off the electrical supply. (See Fig. 9.) Failure to follow this warn- ing could result in a fire or ex- plosion, and personal injury/ death or property damage.
CHECK AIR FILTER: Before attempting to start your furnace, be sure the furnace air filter is clean and in place. See “Performing Routine Main- tenance” section in this manual.
Then proceed as follows:
STEPS FOR STARTING YOUR FURNACE
1.Set your room thermostat to the lowest temperature setting. (See Fig. 8.)
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8a
CL
O
S
E
9
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2.Close the external manual gas valve. (See Fig. 9.)
3.Turn OFF electrical supply to the furnace. (See Fig. 10.)
4.Remove main furnace door. (See Fig. 11.)
5.The gas valve will have a control switch to turn OFF or ON. Turn control switch on the gas control to the OFF position and wait 5 min- utes. (See Fig. 12 or 13.) Then smell for gas, including near the floor. If you smell gas, STOP! Fol- low “B” on furnace label. If you don’t smell gas, go to next step.
6.After waiting 5 minutes, turn con- trol switch on the gas valve to the ON position. (See Fig. 14 or 15.)
7.Replace main furnace door. (See Fig. 16.)
11
For 352MAV and 355MAV
12
OFF | ON |
or |
|
For 340MAV and 350MAV
13
For 352MAV and 355MAV
| 14 |
OFF | ON |
| or |
For 340MAV and 350MAV
15
8.Turn ON electrical supply to the furnace and wait 1 minute.
(See Fig. 17.)
9.Open the external manual gas valve. (See Fig. 18.)
10.Set room thermostat to a tempera- ture slightly above room tempera- ture. This will automatically signal the furnace to start.
11.When the furnace receives the start signal, the inducer is started. When the pressure switch senses that there is sufficient combustion air, the hot surface igniter is ener- gized. After the hot surface igniter is heated for 17 seconds, the gas valve permits gas to flow to the main burners. After ignition and a time delay of about 60 sec, the fur- nace blower will start. Variable- capacity furnaces start at low
speed until the control makes the
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