Carrier 38JB - Manual

Number One
AirConditbning
Maker
^^2 Division of
Cattiet Corporation
Carrier Parkway • Syracuse NY 53221
Centrifugal Fan Condensing Unit
INDEX
Page
SAFETY CONSIDERATIONS......................... 1
INSTAELATION................................................1
Step 1 — Check Equipment and Jobsite ... 1
• UNPACKAGE UNIT.................................... 1
• INSPECT EQUIPMENT...............................2
• COMPLETE OR CONSIDER SYSTEM
REQUIREMENTS......................................... 2
Step 2 — Unit Support........................................ 2
• FLOORS AND FLOOR JOISTS..................2
• TO SUSPEND UNIT...................................... 2
Step 3 — Make Ductwork Connections ... 2
• CONNECT SUPPLY AIR
DUCTWORK................................................. 2
Step 4 — Provide for Unit Condensate
Disposal...............................................3
• BASEPAN DRAIN ........................................ 3
Step 5 — Make Electrical Connections . . . . 3
• BRING LINE POWER LEADS
INTO UNIT.................................................... 3
• CONNECTCONTROL POWER
WIRING..........................................................3
Step 6 — Make Piping Connections.................. 4
• CONNECT REFRIGERANT LINES........... 4
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.
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 016 024
OPERATING WEIGHT (lb) 1060 1370
REFRIGERANT R-22
Charge (lb) 13 9*
COMPRESSOR(S) Recip Hermeticf
Oil, PP33-2 (pt). See Note 10 10 (ea)
CONDENSER AIR FANS Centrifugal, Belt Drive
Motor, Hp...Rpm 5 1750
Motor Frame (NEMA) 213T
Motor Pulley Pitch Diameter
R R-fi R
Range (in.)
Fan Pulley Pitch Diameter (in ) 7 8
Belt; No —Designation 1-B57
Belt Pitch Length (in ) 57
Fan Factory Setting (Rpm) 1370
Fan Range (Rpm) 1220-1460
Max Allowable Fan Speed (Rpm) 1600t
Speed change per 1/2 turn of
movable motor pulley flange
Movable pulley factory setting
1-1 /9
full turns open
Max allowable full turns from
A
closed position
PRESSURESTAT Factory Settings; psig
High Cutout 375 ± 5 428 ± 4
Low Cutout 29 ± 5 29 ± 2
Low Cut-in 39 ± 3 39 ± 3
‘Each system
tone on 016; 2 on 024
tNot attainable with factory-supplied pulley
NOTE Approved vendors and designations —
Sun Oil Company
Texaco, Inc .. . . . . .
Suniso 3GS
Capella Bl
E I DuPont Company DuPont Synthetic Refrigeration Oil
© Carrier Corporation 1980 Form 38JB-3SI