Installation guide

2.Turn gas ON. Temporarilyset balance point
temperaturewarmenoughto lockout heatpump
operation.Changethermostatto HEATmodeand
adjusttemperaturesetpointtoatleast7degreesabove
roomtemperature.Makesurethatthethird(3rd)dip
switchontheignitionboardissetintheOFFposition
(Seewiringdiagram).Wait10minutesforunittoswitch
to highstagegasheat.
3. Removethemanifoldpressureadjustmentscrewcover
ongasvalve.Turnhighstageadjustingscrew,marked
"HI", counterclockwiseto decreasethe manifold
pressureandclockwiseto increasepressure.See
figure14.
4.Set manifoldpressureto valueshowninTable1 or
Table 2. Replaceadjustmentscrewcover and
re-checkmanifoldpressure.
5.Turnthermostatmodeto OFF.Changethermostatto
HEATmode and adjust temperatureset point 5
degreesaboveroomtemperature.
NOTE:Fromthetimethethermostatissettogasheat,you
have10minutesto completelowstagegasadjustments.
After10minutes,thethermostatwillshifttohighstagegas
heat.
6.Removethemanifoldpressureadjustmentscrewcover
ongasvalve.Turnlowstageadjustingscrew,marked
"LO', counterclockwiseto decreasethe manifold
pressureandclockwiseto increasepressure.See
figure14.
7.Set manifoldpressureto valueshowninTable1 or
Table 2. Replaceadjustmentscrewcover and
re-checkmanifoldpressure.
8.Turn thermostat "OFF". Remove manometer
connectionfromtheoutletpressuretapofgasvalve
andreplacepluginoutletpressuretap. Seefigure14.
9. Returnthermostatto customer'sdesiredsettings
(balancepoint temperature,mode, and desired
temperature)afterfinalcheckout.
FIRE AND/OR EXPLOSION HAZARD
Failure to follow this warning could result in per-
sonal injury, death and/or property damage.
Do NOT adjust manifold pressure more than + 0.3
inches water column to obtain rated input.
Check the unit's operation as outlined in the following
instructions, tf any unusual sparking, odors or unusual
noises are encountered, shut off electric power
immediately. Recheck for wiring errors, or obstructions in or
near blower motors.
1. Set thermostat Heat-Cool selector to OFF.
2. Set thermostat fan switch to AUTO.
3. Turn electric power ON. Nothing should start running.
4. Turn manual gas valve ON.
5. Turn gas control valve ON.
6. Set thermostat fan switch to ON.
7. Reset thermostat fan switch to AUTO,
GAS HEATING START-UP PROCEDURE
1. Temporarily set balance point warm enough to lock out
heat pump. Adjust thermostat setting above room
temperature and set thermostat selector to HEAT. The
combustion air blower will energize on high speed.
2. The combustion air blower will run on high speed for 15
seconds to purge the combustion chamber.
3. After the 15 second purge, the combustion air blower
will remain on. The sparker will turn on to ignite the gas
at the same time the gas valve is energized on low
stage. Make sure the gas valve is in the "ON" position
(Refer to Figure 14 and the instruction label located on
the inside of the burner access panel.
4. The sparker will remain energized for 7 seconds or until
a flame is detected by the flame sensor. It may take
several ignition attempts to purge the air out of the gas
line at the initial start-up of the unit.
5. Once flame is proven, the ignition control will switch the
combustion air blower to low speed. The unit will run in
low stage gas heat for 10 minute or until the thermostat
is satisfied, whichever is shorter. Ifthe thermostat is not
satisfied after 10 minutes, the unit will go to second
stage gas heat and run until the thermostat is satisfied.
6.30 seconds after the burners light, the circulating air
blower will begin to run.
7. After checking start up, return balance point
temperature to desired setting.
FIRE AND/OR EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death, and/or property damage.
Do NOT attempt to light the burner with a match or
flame of any kind,
GAS HEATING INPUT RATE CHECK
The gas input to the unit is determined by measuring the gas
flow at the meter. Measuring gas flow at the meter is
recommended for natural gas units. To measure the
heating input, perform the following steps for both low and
high stage:
1. Turn off all other gas appliances that use the same
meter.
2. Turn off gas supply to unit and attach manifold
pressure manometer as instructed in the "Manifold
Pressure Adjustment" section. Turn gas ON.
3,
Temporarily set balance point temperature warm
enough to lock out heat pump operation. Change
thermostat to HEAT mode and adjust temperature set
point to at least 7 degrees above room temperature to
set unit to high stage. Wait 10 minutes for unit to
switch to high stage. Make sure that the third (3rd) dip
switch on the ignition board is set in the OFF position
(See wiring diagram).
4. Record the number of seconds for the gas meter dial
to make 1 revolution.
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