Carrier 542E User Manual download pdf

installation, operation,

and maintenance instructions

PACKAGED HEAT PUMPS

542E

Sizes 024 thru 060

& 542D060

NOTE TO INSTALLER: Leave these instructions with the

unit after installation.

NOTE: The installation of this unit must conform to the

guidelines presented in these unit Installation Instructions.

Read and become familiar with this publication before start

ing installation.

INTRODUCTION

Models 542D and 542E Packaged Heat Pumps are fully self-

contained combinatipn heating/cooling units designed for

outdoor installation. Model 542E may be installed either on

a rooftop or ground-level slab. See Figure 1. Model 542D is

used with an accessory roof-mounting curb (P/N 304851-

302) and incorporates a down-discharge/return-air plenum

as an integral part of the unit. See Figure 2.

These units are factory-charged with R-22 refrigerant.

Installation is simple: connect condensate drain, air ducts,

high- and low-voltage.wiring, and install a field-supplied air

filter (except for model 542D which has factory-supplied air

filters).

All units can be connected into existing duct systems that

are properly sized and designed to handle an airflow of 350 to

450 ffimin per each 12,000 Btuh of rated unit capacity. See

Table I for indoor airflow requirements.

Accessory UL-listed, field-installed, supplemental electric

heat packages are available in a variety of KW and voltage

options. These electric resistance heaters mount inside the

unit blower compartment.

A full line of rooftop system accessories is available for field

installation. These accessories include plenums with facto

ry-supplied air filters (plenum not required with Model

542D), roof-mounting curbs, horizontal and downflow

economizers, barometric relief dampers, concentric diffuser

boxes, and flexible duct packages. Filter racks with air

filters are available for rooftop or ground-level installation.

NOTE: When installing any accessory item, see the Installa

tion Instructions packaged with the accessory.

IMPORTANT-READ BEFORE INSTALLING

1. This installation must conform with all applicable local

and national codes.

2. The power supply (volts, hertz, and phase) must corres

pond to that specified on unit rating plate.

3. The electrical supply provided by your utility must be

sufficient to handle the load imposed by this unit.

4. Refer to the 542D or 542E dimensional drawing for loca

tions of electrical inlets, condensate drain, duct connec

tions, and required clearances before setting unit in

place.

5. Styrofoam shipping blocks located between compressor

and divider panel and between accumulator and divider

panel must be removed. A failure to remove these blocks

can result in undesirable vibration noises being

transmitted into the conditioned space.

Cancels: 40542DP6-A

40542DP16-A

6/1/80

A79110

Figure 1—Model 542E

A79111

Figure 2—Model 542D060 Mounted on

Accessory Roof-Mounting Curb

GENERAL

Models 542D and 542E Packaged Heat Pumps have been

designed and tested in accordance with ARI Standards 240-

77 and 270-75, and these units are UL-listed.

This publication contains the following sections:

I. Moving and Setting Unit in Place

II. Condensate and Defrost Disposal

HI. Duct Connections

IV. Electrical Connections

V. Preparing Unit for Startup

VI. Startup and Adjustments

VII. Sequence of Operation

VIII. Care and Maintenance

BDP Company, Division of Carrier Corp.

1 2 3 4 5 6 ... 17 18

Summary of Contents

Page 1 - & 542D060

installation, operation, and maintenance instructionsPACKAGED HEAT PUMPS542ESizes 024 thru 060& 542D060NOTE TO INSTALLER: Leave these instruc

Page 2 - 542E DIMENSIONS (Inches)

NOTE: Adjustment of the refrigerant charge is not required unless the unit is suspected of not having the proper charge.An operating pressure/temper

Page 3

TABLE VI-AIR DELIVERY (FtVMin) AT INDICATED EXTERNAL STATIC PRESSURE & VOLTAGE*ModelBlowerMotorSpeedOperatingVoltageApplica-tiontExternal Static

Page 4

TABLE VII-MODEL 542D060 & 542E060- 3-PHASE UNITS-MOTOR PULLEY SETTINGS FOR AIR DELIVERY AT INDICATED EXTERNAL SP & VOLTAGE WITH WET COILNOTES:

Page 5

B. Cooling OperationWith the room thermostat SYSTEM switch in the COOL position and the FAN switch in the AUTO position, the cooling sequenc

Page 6

deenergize indoor blower relay coil 2A and compressor contactor coil 2D. All closed contacts return to their normally open position and all

Page 7 - TERMINAL

LEGENDI B-Transformer2A-lndoor Blower Relay SPST (N.O.) 2C-Outdoor Fan Relay SPOT 2D-Compressor Contactor DPST (N.O.) 2P-Defrost Relay TPDT 3D1-Outdoo

Page 8

Clean and lubricate the direct-drive blower motor and wheel as follows;1. Remove and disassemble blower assembly as follows;a. Remove blower and con

Page 9

TABLE Vlll-TROUBLESHOOTING CHART-HEATING CYCLEon the insulation, motor, wiring, or air filter(s). If the drain tube is restricted, clear it with a “pl

Page 10

TABLE IX-TROUBLESHOOTING CHART-COOLING CYCLEally. Be sure to disconnect the electrical power to the unit. Remove the control, blower, an

Page 11

542E REQUIRED CLEARANCE (Inches)Top of unit...48 Blower access door end______30Duct side of unit...

Page 12 - 542D060 STANDARD DRIVE RANGE

Figure 4—542D060 Dimensional DrawingTABLE ll-ELECTRICAL DATA-MODEL 542E-SIZES 024 THRU 042MODEL542ESIZEJ024 J030 J036 1 P036B042 1 P042SERIESAAAAUnit

Page 13

USE SPREADER BARS TO PROTECT UNITUSE SPREADER BARS TO PROTECT UNITA79148Figure 5—542E Suggested RiggingI. MOVING AND SETTING UNIT IN PLACE CAUTION:

Page 14

REVERSING VALVE ASSEMBLYHIGH-PRESSURE SERVICE FITTINGCAPACITOR(S) (COMPRESSOR a FAN MOTOR)BLOWER MOTOR RELAYLOW-PRESSURE SERVICE FITTINGACCUMULATORACC

Page 15

HIGH-VOLTAGE PIGTAIL LEADS-FIELD SPLICEBLKBLK ^ RED1/r/ r-Tok F1ELD-SUPPL1E(POWERSUPPLY3-PHASE UNITS ONLYSWITCHA79244Figure 9—Field High-Voltage Conn

Page 16

A79245Figure 10—Field Low-Voltage Connections Using Room Thermostat P/N 34427DP115 or P/N 34427DP118HEAT PUMP LOW-VOLTAGE TERMINAL BOARDАГ9246Figure 1

Page 17

A80089Figure 12—Removing Belt-Drive Blower Shipping Bracket3. Read the following instructions on all WARNING,CAUTION, and INFORMATION labels attached

Page 18

TABLE IV-HEATING PERFORMANCE PRESSURESAir Temp at Indoor Coil Inlet |°F DB)PressureDesignation(Psig)54ZED24 542E030542E036Air Temperature at Outdoo

Related models: 542D060

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Carrier 542E User Manual

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Summary of Contents

Related models: 542D060

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