Allied Air Enterprises 95G1DF, A95DF, 92G1DF Priming Condensate Trap, Gas Valve Operation Figure

Priming Condensate Trap

The condensate trap should be primed with water prior to start-up to ensure proper condensate drainage. Either pour 10 fl. oz. (300 ml) of water into the trap, or follow these steps to prime the trap:

1.Follow the lighting instructions to place the unit into operation.

2.Set the thermostat to initiate a heating demand.

3.Allow the burners to fire for approximately 3 minutes.

4.Adjust the thermostat to deactivate the heating demand.

5.Wait for the combustion air inducer to stop. Set the thermostat to initiate a heating demand and again allow the burners to fire for approximately 3 minutes.

6.Adjust the thermostat to deactivate the heating demand and wait for the combustion air inducer to stop. At this point, the trap should be primed with sufficient water to ensure proper condensate drain operation.

WARNING

If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or death.

Gas Valve Operation (Figure 50)

1.STOP! Read the safety information at the beginning of this section.

2.Set the thermostat to the lowest setting.

3.Turn OFF all electrical power to the unit.

4.This furnace is equipped with an ignition device which automatically lights the burners. Do not try to light the burners by hand.

5.Remove the heating compartment access panel.

6.Move gas valve switch to OFF. See Figure 50.

7.Wait five minutes to clear out any gas. If you then smell gas, STOP! Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. If you do not smell gas go to next step.

8.Move gas valve switch to ON. See Figure 50.

GAS VALVE SHOWN IN ON POSITION
MANIFOLD	MANIFOLD
PRESSURE	PRESSURE
ADJUSTMENT	OUTLET
SCREW
(UNDER CAP)
INLET
PRESSURE
PORT

FIGURE 50

9.Replace the heating compartment access panel.

10.Turn on all electrical power to the unit.

11.Set the thermostat to desired setting.

NOTE: When unit is initially started, steps 1 through 11 may need to be repeated to purge air from gas line.

12.If the appliance will not operate, follow the instructions “Turning Off Gas to Unit” and call your service technician or gas supplier.

Turning Off Gas to Unit

1.Set the thermostat to the lowest setting.

2.Turn off all electrical power to the unit if service is to be performed.

3.Remove the heating compartment access panel.

4.Move gas valve switch to OFF.

5.Replace the heating compartment access panel.

Failure To Operate

If the unit fails to operate, check the following:

1.Is the thermostat calling for heat?

2.Are access panels securely in place?

3.Is the main disconnect switch closed?

4.Is there a blown fuse or tripped breaker?

5.Is the filter dirty or plugged? Dirty or plugged filters will cause the limit control to shut the unit off.

6.Is gas turned on at the meter?

7.Is the manual main shut–off valve open?

8.Is the internal manual shut–off valve open?

9.Is the unit ignition system in lockout? If the unit locks

out again, inspect the unit for blockages.

Heating Sequence Of Operation

1.When thermostat calls for heat, combustion air inducer starts.

2.Combustion air pressure switch proves blower operation. Switch is factory set and requires no adjustment.

3.After a 15 second prepurge, the hot surface ignitor energizes.

4.After a 20 second ignitor warm-up period, the gas valve solenoid opens. A 4-second “Trial for Ignition” period begins.

5.Gas is ignited, flame sensor proves the flame, and the combustion process continues.

6.If flame is not detected after first ignition trial, the ignition control will repeat steps 3 and 4 four more times before locking out the gas valve. The ignition control will then automatically repeat steps 1 through 6 after 60 minutes. To interrupt the 60 minute lockout period, move thermostat from “Heat” to “OFF” then back to “Heat”. Heating sequence then restarts at step 1.

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