Carrier 38JB User Manual

Number One
AirConditbning
Maker

^^2 Division of

Cattiet Corporation

Carrier Parkway • Syracuse NY 53221

Centrifugal Fan Condensing Unit

INDEX

SAFETY CONSIDERATIONS

INSTAELATION................................................1

Step 1 — Check Equipment and Jobsite ... 1

• UNPACKAGE UNIT

....................................

• INSPECT EQUIPMENT

• COMPLETE OR CONSIDER SYSTEM

REQUIREMENTS.........................................2

Step 2 — Unit Support........................................2

• FLOORS AND FLOOR JOISTS

• TO SUSPEND UNIT

......................................

Step 3 — Make Ductwork Connections ... 2

• CONNECT SUPPLY AIR
DUCTWORK

.................................................

Step 4 — Provide for Unit Condensate

Disposal...............................................3

• BASEPAN DRAIN

........................................

Step 5 — Make Electrical Connections .... 3

• BRING LINE POWER LEADS
INTO UNIT

....................................................

• CONNECTCONTROL POWER

WIRING..........................................................3

Step 6 — Make Piping Connections

• CONNECT REFRIGERANT LINES

START-UP...........................................................5

SERVICE ............................................................6

SAFETY CONSIDERATIONS

Installation and servicing of air conditioning
equipment can be hazardous due to system pressure
and electrical components. Only trained and quali
fied service personnel should install, repair or

service air conditioning equipment.

Untrained personnel can perform basic mainten
ance functions of cleaning coils and filters and

replacing 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.

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INSTALLATION

General — Install the 38JB condensate unit indoors.

Provide access for cleaning and servicing as shown in
Fig. 1. Use field-supplied condenser air filters fpr
proper unit operation.

Step 1 — Check Equipment and Jobsite

UNPACKAGE UNIT — Move to final location.

Use care as unit is heavy and awkward to handle.
Carefully remove from carton so as not to damage
unit.

)■ Table 1 — Physical Data

UNIT38JB

OPERATING WEIGHT (lb)

REFRIGERANT

Charge (lb)

COMPRESSOR(S)

Oil, PP33-2 (pt). See Note

CONDENSER AIR FANS

Motor, Hp...Rpm
Motor Frame (NEMA)
Motor Pulley Pitch Diameter

Range (in.)
Fan Pulley Pitch Diameter (in )
Belt; No —Designation
Belt Pitch Length (in )
Fan Factory Setting (Rpm)
Fan Range (Rpm)
Max Allowable Fan Speed (Rpm)
Speed change per 1/2 turn of

movable motor pulley flange
Movable pulley factory setting

full turns open

Max allowable full turns from

closed position

PRESSURESTAT

High Cutout
Low Cutout
Low Cut-in

‘Each system
tone on 016; 2 on 024
tNot attainable with factory-supplied pulley
NOTE Approved vendors and designations —

Sun Oil Company

Texaco, Inc .. . ....

E I DuPont Company DuPont Synthetic Refrigeration Oil

016

1060 1370

13
Recip Hermeticf

10

Centrifugal, Belt Drive

1220-1460

Factory Settings; psig

375 ± 5

29 ± 5 29 ± 2
39 ± 3

024

R-22

9*

10 (ea)

5 1750

213T

R R-fi R

7 8

1-B57

57

1370

1600t

1-1 /9

A

428 ± 4

39 ± 3

Suniso 3GS

Capella Bl

© Carrier Corporation 1980 Form 38JB-3SI

^Issa

Fig. 1 — Dimensions

INSPECT EQUIPMENT — File claim with
shipping company if equipment is damaged or
incomplete.

COMPLETE OR CONSIDER SYSTEM RE
QUIREMENTS before installing the 38JB centri

fugal fan condensing unit.

Consult local building codes and National Elec

trical Code (NEC) for installation requirements.

Step 2 — Unit Support

FLOORS AND FLOOR JOISTS of existing build
ings may require reinforcement. Follow applicable
codes requiring weight distribution. Refer to
Table 1, Fig. 1 and Fig. 2.

TO SUSPEND UNIT — Remove plug buttons
from the clearance holes in the top panel. See Fig. 1.
Insert field-supplied 1 / 2-in. hanger rods in clearance
holes and screw into weld nuts in bottom frame.

Screw each rod thru bottom frame and secure with

a lock washer and locknut on underside of unit.

Step 3 — Make Ductwork Connections

CONNECT SUPPLY AIR DUCTWORK — Con
nect to unit openings with flexible connections.
Secure ducts to building structure to prevent vibra
tion. Insulate ducts with 1-in. thick fiberglass and a