Unit Introduction; Operating Your Unit; Fire And Explosion Hazard - Carrier INFINITY 48XL-A Owner's Information Manual

UNIT INTRODUCTION

This 48XL- -A unit is a small packaged gas heat/electric cooling sys-
tem that can utilize the comfort of gas heating packaged along with
efficient electric air conditioning. This unit uses Puron
ronmentally friendly refrigerant, for cooling.

OPERATING YOUR UNIT

The operation of your unit is controlled by the Infinityr User Inter-
face (UI). You simply program the UI and it maintains the indoor
temperature at the level you select. See UI manual for detailed in-
structions.
To better protect your investment and to eliminate unnecessary ser-
vice calls, familiarize yourself with the following facts:
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 UI 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. 3.)
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 UI slightly above room tem-
perature 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 UI to desired setting.
Filter Access Panel
For Accessory Filter Rack
Fig. 2 - - Accessory Filter Rack Access Panel
®
, the envi-
Access Panels
A09045
Burners
Fig. 3 - - Gas Heating/Electric Cooling Unit with Access Panel
Removed (Standard unit shown. Actual appearance is shown
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.
To shut off unit gas heat:
WARNING
!
FIRE, EXPLOSION,
HAZARD
Failure to follow this warning could result in personal injury,
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.
Refer to Fig. 4 while proceeding with the following steps.
1. Set the temperature selector on UI to lowest temperature set-
ting 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.
5. Move the selector switch on the internal gas valve to the OFF
position.
To start unit electric cooling:
Refer to Fig. 5 while proceeding with the following steps.
1. Set the temperature selector on UI to highest temperature
setting and set system SWITCH to OFF.
2. Close the external manual shutoff valve, if not already
closed.
3. Turn off the electrical power supply to the unit.
3
Flue Hood
Gas Valve
in Fig. 2.)
ELECTRICAL SHOCK
A09043