Allied A80UH1E - Placement & Installation; Start-Up; Heating System Service Checks

508096-01Issue 2037Page 22 of 34
Placement & Installation
Make sure unit is installed in accordance with installation
instructions and applicable codes.
Start-Up
Heating Start-Up
Shock and burn hazard.
A80UH1E / 80G1UHE units are equipped with a hot
surface ignition system. Do not attempt to light manually.
WARNING
Gas Valve Operation (Figure 17)
1. STOP! Read the safety information at the beginning
of this section.
2. Set the thermostat to the lowest setting.
3. Turn o󰀨 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 access panel.
6. Move gas valve switch to OFF. See Figure 17.
7. Wait ve 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 17.
Figure 17. Gas Valve
GAS VALVE SHOWN IN ON POSITION
MANIFOLD
PRESSURE
OUTLET
PORT
INLET
PRESSURE
PORT
MANIFOLD PRESSURE
ADJUSTMENT SCREW
(under barbed fitting)
9. Replace the access panel.
10. Turn on all electrical power to 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 O󰀨 Gas to Unit” and call your service
technician or gas supplier.
Turning O󰀨 Gas to Unit
1. Set the thermostat to the lowest setting.
2. Turn o󰀨 all electrical power to the unit if service is to
be performed.
3. Remove the upper access panel.
4. Move gas valve switch to OFF position. Do not force.
See Figure 17.
5. Replace the upper access panel.
Safety or Emergency Shutdown
Disconnect main power to unit. Close manual and main
gas valves.
Extended Period Shutdown
Turn o󰀨 thermostat or set to “UNOCCUPIED” mode.
Close all gas valves (both internal and external to unit) to
guarantee no gas leaks into combustion chamber. Turn
o󰀨 power to unit. All access panels and covers must be in
place and secured.
Heating System Service Checks
C.S.A. Certication
All units are C.S.A. design certied without modications.
Refer to the A95UH1E / 95G1UHE Operation and
Installation Instruction.
Gas Piping
Gas supply piping should not allow more than 0.5” W.C.
drop in pressure between gas meter and unit. Supply gas
pipe must not be smaller than unit gas connection.
Compounds used on gas piping threaded joints should be
resistant to action of liqueed petroleum gases.
Testing Gas Piping
If a exible gas connector is required or allowed by
the authority that has jurisdiction, black iron pipe shall
be installed at the gas valve and extend outside the
furnace cabinet.
CAUTION