Allied Air Enterprises 506271-01 - Manual (Page 8)

Page 8 of 14 506271-01 Issue 0921
START-UP
Pre-Start Check List
Complete the following checks before starting the unit:
1. Check the type of gas being supplied. Be sure it is the
same as listed on the unit nameplate.
2. Make sure that the vent cover has been properly
installed.
For Your Safety Read Before Lighting
To Light Main Burners:
1.
Turn off electrical power to unit.
2. Turn the thermostat to lowest setting.
3. Turn the gas valve knob to the “ON” position (see Figure
7).
4. Turn on electrical power to the unit.
5. Set the room thermostat to the desired temperature. (If
the thermostat “set” temperature is above room
temperature after the pre-purge time expires, main
burners will light.)
To Shut Down Main Burners:
1.
Turn off electrical power to unit.
2. Turn the gas valve switch to the “OFF” position (see
Figure 7).
Post-Start Check List
After the entire control circuit has been energized and the
heating section is operating, make the following checks:
1. Check for gas leaks, using soapy solution, in the unit
piping as well as the supply piping.
2. Check for correct manifold gas pressures (see Manifold
Gas Pressure Adjustment Regulator sections).
3. Check the supply gas pressure. It must be within the
limits shown on the rating plate. Supply pressure should
be checked with all gas appliances in the building at full
fire. At no time should the standby gas pressure exceed
13" w.c., nor the operation pressure drop below 5" w.c.
for natural gas units or 11" w.c. for propane gas. If gas
pressure is outside these limits, contact the gas supplier
for corrective action.
4. Adjust temperature rise to the range specified on the
rating plate.
Furnace is equipped with a direct ignition control. Do not
attempt to manually light the burners.
CAUTION
Typical Wiring Connections
Figure 7
Gas Valve
Figure 7
Gas Control Switch
Regulator
Adjustment
(Under Cap)