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HEATING & COOLING

48JZ

Single-Packaged Gas Heat/Electric Heat Pump

Unit with Puron (R-410A) Refrigerant

Visit www.carrier.com

A Guide to Operating and Maintaining Your

Single-Packaged Gas Heat/Electric Heat Pump Unit

NOTE: Read the entire instruction manual belbre starting the

installation.

SAFETY CONSIDERATIONS

Note to Installer: This manual should be left with the equipment

user.

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Do not store or use gasoline or other flammable vapors and

liquids in the vicinity of this or any other appliance. Failure to

lk)llow this warning could result in fire, serious injury, or

death.

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Do not use this unit if any part has been under water.

hnmediately 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.

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Before performing recommended nmintenance, be surc the

main power switch to unit is turned off and lock-out tag

installed. Electric shock could cause serious injury or death.

UNIT INTRODUCTION

Tiffs 48JZ unit is a small packaged gas heat/electric heat pump

system that can utilize both the efficiency ol' heat pump heating

and the comfort of gas heating. The system will optimize lk)r ideal

heating, depending on several factors. This unit uses Puron_Z the

ozone friendly refrigerant lbr cooling and heat pump heating.

Starting or Shutting Unit Off

1. To start the unit:

a. Turn on the electrical and gas power supply to unit.

b. Select temperature and set SYSTEM switch or MODE

control to desired mode.

2. To shut unit off:

NOTE: If the unit is being shut down because of a malfunction,

call your dealer as soon as possible.

a. Set system SWITCH or MODE control to OFF.

b. Turn off the electrical power, install lock-out tag and shut

olT gas supply to unit.

OPERATING YOUR UNIT

The operation ol' your system is controlled by the indoor tempera-

ture control (lk_r 48JZ, either a Tt_ermidistat TM or dual fuel

thermostat is required). You simply adjust the thermostat and it

maintains the indoor temperature at the level you select. Most

thermostats of heating and cooling systems have 3 controls: a

temperature control selector, a FAN control, and a SYSTEM or

MODE control. Refer to your thermostat owner's manual for more

inlkmnation.

C99088

Fig. 1--Unit 48JZ

To better pn)tect your in'vestment and to eliminate um]ecessary

service calls, familiarize yourself with the following facts:

1. During heat pump heating, increasing the thermostat setting

more than 2°F may cause the supplemental gas heat to be

turned on for a short period ol' time to satisl_ the thermostat.

Needless use of the supplementary heat reduces potential

energy savings.

2. Ice or frost tends to lbrm on the coil during winter heating

operation. Your heat pump is designed to automatically melt

the ice. When in this defrost cycle, it is normal for steam or

fog to rise from the outdoor unit. Do not be alarmed!

Step 1--Cooling Mode

With the SYSTEM or MODE control set to COOL, your unit will

run in cooling mode until the indoor temperature is lowered to the

level you have selected. On extremely hot days, your unit will run

lk_r longer periods at a time and have shorter "ofl" periods than on

moderate days.

Step 2--Heat Pump Heating Mode

With the SYSTEM or MODE control ol' your indoor thermostat set

to HEAT, your unit will run in heat pump heating mode until room

temperature is raised to the level you have selected. Of course,

your system will run for longer periods to maintain a comfortable

environment on cooler days and nights than on moderate ones.

Step 3--Gas Heat Mode

Your heat pump is your primary heating source. Your system is

also be equipped with a supplemental gas heating source. On cold

days and nights, your system will automatically turn on the

supplemental heat in order to maintain the level ol' comlk)rt you

have selected.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations,

PC 101 Catalog No. 534-80084 Printed in U.S.A. Form OM48-15 Pg 1 10-01 Replaces: New

Summary of content (4 pages)

PAGE 1
48JZ Single-Packaged Gas Heat/Electric Heat Pump Unit with Puron (R-410A) Refrigerant HEATING & COOLING Visit www.carrier.com A Guide to Operating and Maintaining Your Single-Packaged Gas Heat/Electric Heat Pump Unit NOTE: Read the entire instruction manual belbre starting the installation. SAFETY Note to Installer: CONSIDERATIONS This manual should be left with the equipment user.
PAGE 2
When your heat pump needs able, your Carrier electronic mental gas heat and display Step 4--Defrost freeze on the surlitce would impede operation, The del_'ost heat pump starts start at the preset heating After across may begin to to build the mnount air. So, to maintain energy-efficient has an automatic at a preset defrost time interval mode. Defrost will to interlEre with operation.
PAGE 3
I. ["L.11ii[,]_ Never operate to heed your unit without this warning motor and/or tile filter(s) may result compressor. ill place. in damage All accunmlation internal parts of your nnit call cause some cases, a fire. Failure to the blower of dust and lint on loss of efficiency and, in Inspection coils. and, if required, cleaning of the outdoor and indoor 2. Inspection and, if required, cleaning of tile indoor coil drain pan. 3.
PAGE 4
Copyright 2001 CARRIER Manufacturer PC 101 Corp. ° 7310 W. Morris St. ° Indianapolis, reserves the right to discontinue, Catalog No. 534-80084 IN 46231 om4815 or change at any time, specifications Printed in U.S.A. Form OM48-15 or designs without notice and without incurring Pg 4 10-01 obligations.