Carrier Performance 15 48VR-A Owner's Information Manual page 3

UNIT INTRODUCTION
These 48VR-A units are small packaged gas heat/electric heat
pump systems that can utilize the efficiency of heat pump heating
and the comfort of gas heating. The system will optinfize for ideal
heating, depending on several factors. This unit uses Puron ®, the
ozone friendly refrigerant for cooling and heat pump heating.
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 low-
est temperature setting and set system switch to Emergency
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.)
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.
Filter Access Panel
For Accessory Filter Rack
Compressor
Access
Panel
Blower Control
Access Access
Panel Panel
Fig. 2 - Unit Access Panel
A09213
5. Move the selector switch on the internal gas valve to the
OFF position and wait 5 nfinutes.
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 25 seconds. If the burner
does not light within 25 seconds, the ignition module will
go into a Retry Mode after a period of approximately 20
seconds (following the 7-second ignition period). If the
burners do not light by the 4 th ignition try of the initial call
for heat, there is a lockout.
11. Set the temperature selector on room thermostat to desired
setting.
Flue Hood
Burners Gas Valve
A09043
Fig. 3 - Gas Heating/Electric Cooling Unit with Access Panel
Removed
To shut off unit 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 electrical 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.
Refer to Fig. 5 while proceeding with the following steps.
1. 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 control access panel. (See Fig. 2.)
5. Move the selector switch on the internal gas valve to the
OFF position.
6. Replace the control access panel.