Gas Heat Start-Up
TYPICAL GAS TRAIN
The gas heat has been fully tested and commissioned at
the factory prior to shipment. Adjustment should not be
necessary.
Combustion Gas Blower Rotation
1. With the main gas valve and firing valve closed, turn on the
disconnect.
2. Depress the combustion gas blower contactor manually
momentarily to “bump” the fan. Check combustion gas
blower fan rotation either by watching the blower rotation
or holding a piece of paper to the blower inlet and seeing
if the paper is drawn in. If the blower is not rotating in the
correct direction, reverse any two leads on the load side
the blower contactor.
Gas Burner Start-Up
Once the electrical power and fan rotation have been
confirmed, the gas heat can be commissioned as follows:
3. Confirm that all access section doors are closed so the
correct air flow is passing over the heat exchanger.
4. Check that the gas pressure at the inlet matches that
listed on the rating plate. If it does not, do not continue
with the commissioning. Correct the gas pressure.
5. With the main gas shutoff valve and firing valve closed,
turn on the disconnect.
6. Reset the primary flame safeguard by pushing the reset
button.
7. Select “on” for the system switch and “summer mode” on
unit changeover switch. This will allow the fan to operate
but not the gas heat.
8. Open the main gas shut-off valve while keeping the firing
valve closed. This will allow gas to flow to the pilot valve
but not the main burner.
9. Select “winter mode” on the unit changeover switch. This
will enable the gas heat.
10. Adjust the thermostat or other controller to call for heat.
11. After a pre-purge period, the pilot will light but the main
burner will not. Note, if the gas line has not been properly
purged, the unit may go off on a safety due to no gas
sensed at the pilot. Reset the flame safety and try again.
Depending on the length of field piping, this may take
several attempts.
FIRE OR EXPLOSION HAZARD
Failure to follow safety warning exactly could result in
serious injury, death or property damage.
Be sure to read and understand the installation, operation
and service instructions in this manual.
Improper installation, adjustment alteration, service or
maintenance can cause serious injury, death or property
damage.
• Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try and light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Leave building immediately.
• Immediately call your gas supplier from a phone
remote from the building. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the fire
department.
• Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
WARNING
GAS BURNER
PRIMARY
FLAME SAFE-
GUARD
MAIN GAS VALVE
FIRING VALVE
APPLIANCE
REGULATOR
21
AW-I
INSTALLATION INSTRUCTIONS
priceindustries.com
|
AW-I - Manual
