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INTRODUCTION
This PY3G unit is a small packaged
gas heat/electric
cooling system
that can utilize
the comfort of gas heating
packaged
along with effi-
cient electric
air conditioning.
This unit uses
R-410A,
the ozone
friendly
refrigerant
for cooling.
Starting
or Shutting
Off Unit
Note:Your
combination
heating/cooling
unit is equipped
with an
automatic
direct spark ignition
and power
combustion
blower.
To start unit gas heat:
Refer to Fig. 2 for location
of unit front access panel. Refer to Fig.
3 for location
of gas valve. Refer to Fig. 4 while proceeding
with the
following
steps.
1. Set the temperature
selector on room thermostat
to the lowest
temperature
setting and set system switch
to HEAT.
2. Close the external
manual
gas shutoff valve.
3. Turn off the electrical supply
to the unit.
4. Remove
the front access panel with a 5/16-in.
nut driver.
5. Move the selector switch on the internal gas valve to the OFF
position
and wait 5 minutes.
6. Move the selector switch on the internal gas valve to the ON
position.
7. Replace
the front access panel.
8. Turn on the electrical supply
to unit.
9. Open the external
manual
gas shutoff valve.
10.
Set the temperature selector on room thermostat slightly
above room temperature to start unit. The induced-draft
combustion air fan will start. Main gas valve will open and
main burners should ignite within 5 seconds. If the burner
does not light within 5 seconds, the ignition module will go
into a Retry Mode after a period of approximately
22
seconds (following the 5-second ignition period). If the
burners do not light within 15 minutes of the initial call for
heat, there is a lockout.
11. Set the temperature selector on room thermostat to desired
setting.
ACCESS PANEL
FI_ER ACCESS
PANEW
*For accessory filter rack.
A05121
Fig. 2 - Accessory
Filter Rack
Access Panel
FIRE AND EXPLOSION
HAZARD
Failure to follow this warning
could result in personal iniury,
death, and/or property
damage.
1. If the main burners fail to light, or the blower
fails to start,
shut down gas heating
section and call your dealer for service.
2. Never attempt
to manually
light the main burners
on unit
with
a match,
lighter,
or any other
flame.
If the electric
sparking
device
fails to light the main burners,
refer to the
following
shutdown
procedures,
then call your dealer as soon
as possible.
To shut offunit
gas heat:
FIRE,
EXPLOSION,
ELECTRICAL
SHOCK
HAZARD
Failure to follow this warning could result in personal iniury,
death, and/or property damage.
Do not turn off the electrical power to unit without first
turning off the gas supply.
Note:If the unit is being shut down because of a malfunction, call
your dealer as soon as possible.
Should overheating occur or the gas supply fail to shut off, shut off
the external manual gas valve to the unit before shutting off the elec-
trical supply. Do not use this unit if any part has been under water.
Immediately call a qualified service technician to inspect the unit
and to replace any part of the control system and any gas control
which has been under water.
Rear
1.
to Fig. 5 while proceeding
with the following
steps.
Set the temperature
selector on room thermostat
to lowest
temperature
setting and set system
SWITCH
to OFF.
2. Close the external
manual
shutoff valve.
3. Turn off the electrical power
supply to the unit.
4. Remove
the front access panel.
5. Move the selector switch on the internal gas valve to the OFF
position.
6. Replace
the front access panel.
To start unit electric
cooling:
Refer to Fig. 6 while proceeding
with the following
steps.
1. Set the temperature
selector
on room thermostat
to highest
temperature
setting and set system
SWITCH
to OFF.
2. Close the external
manual
shutoff valve.
3. Turn off the electrical power
supply to the unit.
4. Remove
the front access panel.
5. Move the selector switch on the internal gas valve to the OFF
position.
6. Replace
the front access panel
7. Restore
electrical power
to the unit and set system
switch to
COOL.
8. Set the temperature
selector on room thermostat
slightly be-
low the room temperature
to start unit.
To shut off unit electric cooling:
Refer to Fig. 7 while proceeding
with the following
steps.
1. Set the temperature
selector
on room thermostat
to highest
temperature
setting and set system
SWITCH
to OFF.
2. Close the external
manual
shutoff valve.
3. Turn off the electrical power
supply to the unit.
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