Carrier PY4G, Owner'S Information Manual

Page: 3 / 10

PY4G: Owner’s Information Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
3
Unit Introduction
This unit is a small packaged gas heat/electric cooling system that can
utilize the comfort of gas heating packaged along with efficient electric
air conditioning. This unit uses R-410A, the environmentally balanced
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 control access panel with a 5/16-in. nut driver. (See
Fig. 2 .)
A170032
Fig. 2 – Unit Access Panel
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 control 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.
WARNING
!
FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury, death
and/or property damage.
1. Do not turn off the electrical power to unit without first turning off
the gas supply.
2. Before attempting to start the gas heating section, familiarize
yourself with all the procedures that must be followed.
WARNING
!
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal injury, death,
and/or property damage.
Do not attempt to light by hand.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
When removing access panels or performing maintenance functions
inside your unit, be aware of sharp sheet metal parts and screws.
Although special care is taken to reduce sharp edges to a minimum, be
extremely careful and wear safety glasses, protective clothing, and
work gloves when handling parts or reaching into the unit.
WARNING
!
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could result in personal injury, 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.
COMPRESSOR
ACCESS PANEL
BLOWER
ACCESS
PANEL
CONTROL
ACCESS
PANEL