Carrier 38EN User Manual download pdf

HEATING A COOLING

38EN

Air-Cooled Condensing Units

Installation and Start-Up Instructions

SAFETY CONSIDERATIONS

Installing and servicing air conditioning equipment

can be hazardous due to system pressure and electrical

components. Only trained and qualified service personnel

should install or service air conditioning equipment.

Untrained personnel can perform basic maintenance,

such as cleaning and replacing filters. All other opera

tions should be performed by trained service personnel.

When working on air conditioning equipment, observe

precautions in literature and on tags and labels attached

to unit.

Follow all safety codes. Wear safety glasses and work

gloves. Use quenching cloth for brazing operations.

Have fire extinguisher available. Read these instruc

tions thoroughly. Consult local building codes and

National Electrical Code (NEC) for special installation

requirements.

A WARNING

Before installing or servicing system, always turn

off main power to system. There may be more

than one disconnect switch. Turn off accessory

heater power if applicable. Electrical shock can

cause personal injury.

Step 1 — Check Equipment and Jobsite —

Install on a solid, level mounting pad. It is not recom

mended that unit be attached to pad using tiedown bolts.

Fasten unit to pad using holes provided in unit mounting

feet. See Fig. 1.

When installing, allow sufficient space for airflow

clearance, wiring, refrigerant piping and service. Main

tain a minimum of 4 ft clearance from obstructions above

and 18 in. on 3 sides of unit (12 in. on fourth side). Main

tain a distance of 24 in. between condensing units. Posi

tion so water or ice from roof or eaves cannot fall directly

on unit.

Step 2 — Replace Indoor AccuRater™ Piston,

if required.

REPLACE ACCURATER REFRIGERANT CON

TROL PISTON in the indoor coil, if required, before

connecting refrigerant lines. Refer to Table 2 for proper

piston size.

Step 3 — Make Piping Connections — Outdoor

units may be connected to indoor sections using Carrier

accessory tubing package (refer to Service Data) or

field-supplied tubing of refrigerant grade, correct size

(see Table 1) and condition. For tubing requirements

beyond 50 ft, obtain information from your local

distributor.

Outdoor Units Connected to Carrier-Approved

Indoor Units — Outdoor units contain correct system

refrigerant charge for operation with indoor unit of the

same size when connected by 25 ft of field-supplied or

Carrier accessory tubing. Check refrigerant charge for

maximum efficiency (see Refrigerant Charging, page 4

and Service Data).

Certified dimension drawings avaiiabie upon request

Fig. 1 — Dimensions, Connections and

Mounting Pad (Refer to Table 1)

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

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1 2 3 4 5 6

Air-Cooled Condensing Units 1

Summary of Contents

Page 1 - Air-Cooled Condensing Units

HEATING A COOLING38ENAir-Cooled Condensing UnitsInstallation and Start-Up InstructionsSAFETY CONSIDERATIONSInstalling and servicing air conditioni

Page 2

HEATING A COOLING^ 38ENAir-Cooled Condensing UnitsTable 1 — Physical Data (Refer to Fig. 1)MODEL 38EN015 018024 030 036042 048060OPER WT (lb)*94 1111

Page 3

HEATING A COOLING38ENAir-Cooled Condensing UnitsMechanical Connection — Mate one set of connections at a time.1. Loosen nut on Compatible

Page 4

HEATING A COOLING38ENAir-Cooled Condensing UnitsINSTALL BRANCH CIRCUIT DISCONNECT PER NEC of adequate size to handle unit starting current

Page 5

HEATING A COOLING38ENAir-Cooled Condensing UnitsTHERMOSTAT SUBBASETHERMOSTAT SUBBASEARRANGEMENT B-ONE TRANSFORMER (COOLING AND ONE-STAGE HEATING)THE

Page 6

HEATING A COOLING38ENAir-Cooled Condensing UnitsManufacturer reserves the right to discontinue, or change at any time, specifications or designs witho

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Carrier 38EN User Manual

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