Carrier 48XZ024-030 Manual To Operating And Maintaining

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A Guide to Operating and Maintaining Your
Single-Packaged Gas Heat/Electric Heat Pump Unit
NOTE: Read the entire instruction manual before starting the
installation.

SAFETY CONSIDERATIONS

Note to Installer: This manual should be left with the equipment
user.
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified personnel should install, repair, or service
air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters. All other operations should be performed
by trained service personnel. When working on air-conditioning
equipment, observe precautions in the literature, tags, and labels
attached to the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations.
Improper installation, adjustment, alteration, service, mainte-
nance, or use can cause carbon monoxide poisoning, fire, or
an explosion which could result in personal injury or unit
damage. Consult a qualified installer, service agency, or gas
supplier for information or assistance. The qualified installer
or agency must use only factory-authorized kits or accessories
when modifying this product.
Before performing service or maintenance operations on unit,
turn off gas supply to unit. Then turn off unit main power
switch. Electrical shock or explosion could cause serious
injury or death.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance. Failure to
follow this warning could result in fire, serious injury, or
death.
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 which has
been under water. Failure to follow this warning could result
in electrical shock, fire, serious injury, or death.
Recognize safety information. This is the safety-alert symbol
When you see this symbol in instructions or manuals, be alert to
the potential for personal injury.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 101 Catalog No. 534–80126
Tab 1 6
Single-Packaged Gas Heat/Electric Heat Pump
Unit with Puron® (R-410A) Refrigerant
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies a hazard
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which would result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
These instructions cover minimum requirements and conform to
existing national standards and safety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept up with changing residen-
tial construction practices. We require these instructions as a
minimum for a safe installation.
This 48XZ unit is a small packaged gas heat/electric heat pump
system that can utilize both the efficiency of heat pump heating
and the comfort of gas heating. The system will optimize for ideal
heating, depending on several factors. This unit uses Puron®, the
ozone friendly refrigerant for cooling and heat pump heating.

Starting or Shutting Unit Off

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Printed in U.S.A. Form OM48–17

UNIT INTRODUCTION

Fig. 1—Unit 48XZ
1. To start the unit:
a. Turn on the electrical and gas power supply to unit.
b. Select desired temperature on thermostat and set SYSTEM
switch or MODE control to desired mode.
2. To shut unit off:
Pg 1
48XZ
C99088
1–04 Replaces: New