Carrier 38HD User Manual download pdf

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HEATING & COOLING

38HD

Split System Condensing Units

Installation, Start-Up and Service

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.

Fig. 1 — Model 38HD

INSTALLATION

Step 1 — Complete Pre-Installation Checks.

UNPACK UNIT (See Fig 1.) — Move unit to final

location Remove carton from unit being careful not to.

damage service valves and grilles. *

INSPECT SHIPMENT — File claim with shipping

company if shipment is damaged or incomplete.

CONSIDER SYSTEM REQUIREMENTS — Consult

local building codes and National Electrical Code (NEC)

for special installation requirements.

Allow sufficient space for airflow clearance, wiring,

refrigerant piping, and servicing unit. See Fig. 2 and 3.

Locate unit so that condenser airflow is unrestricted

on both sides. Refer to Eig 2 and 3.

Unit may be mounted on a level pad directly on base

legs or mounted on raised pads at support points See

Fig. 2 and 3 for center of gravity

CHECK ACCURATER® — The correct AccuRater

(bypass type) refrigerant control is required for cooling

system capacity optimization. An AccuRater with field-

replaceable piston (see Fig. 4) is supplied on evaporator.

Use Optimization Chart, Table 1, to find AccuRater

piston size required for condenser/evaporator system

being installed. Note that one of 2 types of AccuRaters

can be found on the indoor unit. Determine from Fig. 4

and Table 1 which type is in the indoor unit. Do r/otinter-

change eomponents between AccuRater types. Matching

of condensing unit with evaporator may require field

replacement of piston. Refer to Table 1. Replace piston,//

required, before connecting refrigerant lines. Piston

replacement instructions are included in evaporator

installation book. After system installation is complete,

see Refrigerant Charging to check and/or adjust refrig

erant charge

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

PC 111 Catalog No 533-850 PrintedinUSA Form38HD-1SI Pgl 6-89 Replaces: New

For replacement items use Carrier Specified Parts.

Book 1 4

Tab 3a 2a

1 2 ... 12

Summary of Contents

Page 1 - Instructions

Ibl']-HEATING & COOLING38HDSplit System Condensing UnitsInstallation, Start-Up and ServiceInstructionsSAFETY CONSIDERATIONSInstalling and s

TlT23SEChOPERATINGTIME5MIN-BLK DENOTES CLOSED CONTACTSFig. 9 — Time Guard II Sequence ChartCOMPRESSORLOCKOUT<D Q <1>-BLU-(p dl-BRN BRN—(COMMO

Page 3 - 3/4"

TROUBLESHOOTING CHART — COOLING CYCLE

Page 4

iManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obiigations.Boo

Page 5

«6»CLEARANCES FOR SERVICE AND AIRFLOW, ALLOW 6 IN. ABOVE UNIT.T6 IN.HHORIZONTAL AIR DISCHARGEHIGH VOLTAGE 1-1/8' DIA.F1^ © T ¥ f:[^¡©[Hlir

Page 6 - A WARNING

f''UNITWEIGHTA B C38HD036 (108 9 kg) 240 ibs(352)1 '-1 %"(19 05) 3/4"(9 53) %"38HD048(110 7 kg) 244 ibs(347)I'-iya&

Page 7

RETAINERFLARE NUTTable 1 — AccuRater Optimization ChartFLARECONNECTIONTYPE A(Arrow on AccuRater body points in metering direction.)(Arrow on AccuRat

Page 8

Table 2 — Physical DataUNIT 38HD 018 024030036048060OPER WT (lb), 1 ph/3 ph148/* 160/*171/* 240/226244/235244/235REFRIGERANTR-22COMPRESSORModelOil (pt

Page 9

________IARRANGEMENT A-(COOLING ONLY)ARRANGEMENT B-ONE TRANSFORMER (COOLING AND ONE-STAGE HEATING)ARRANGEMENT C-ONE TRANSFORMER (COOLING AND TWO-S

Page 10 - A CAUTION

Table 3 — Electrical Data (60 Hz)OUTDOOR UNIT 38HDV/PHOPER VOLTS*COMPR FANFLAMCAMAX FUSE OR HACR TYPE CKT BKR AMPSMaxMinLRA RLA018024030036048060208/2

Page 11

Charge System — Release holding charge into system by opening (backseating) liquid and suction line service valves. Add charge amou

Page 12 - Tab

field repaired, therefore only a complete valve or valve stem and service port caps are available for replacement.AccuRater® (Bypass Type) Ser

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