Carrier 38EN - Manual (Page 3)

HEATING A COOLING
38EN
Air-Cooled Condensing Units
Mechanical Connection — Mate one set of connec­
tions at a time.
1. Loosen nut on Compatible Fitting one turn. Do not
remove.
2. Remove plug and be sure O-ring is in the groove
inside the Compatible Fitting.
3. Cut tubing to correct length, deburr and size as
necessary.
4. Insert tube into Compatible Fitting until it bottoms.
Tighten nut until it bottoms on shoulder of fitting or
valve. Keep tube bottomed in Compatible Fitting
while tightening nut.
A CAUTION
If undersized, damaged or elliptically-shaped
tubing is used when making Compatible Fitting,
leaks may result.
Sweat Connection — Use refrigerant grade tubing.
1. Remove locking nut, rubber O-ring and Schrader core
and cap from valve service port.
2. Cut tubing to correct length, deburr and size as
necessary.
3. Insert tube in Compatible Fitting until it bottoms.
NOTE: Wrap top and bottom of service valves in wet
cloth to prevent damage by heat. Solder with low-
temperature (430 F) silver alloy solder.
4. Replace Schrader core and cap.
5. Evacuate or purge system using field-supplied
refrigerant.
Compatible Fitting Repair
MECHANICAL CONNECTION — Frontseat unit
service valves. Relieve refrigerant pressure froni tubing.
Back off locknut from Compatible Fitting onto tube. Cut
fitting between threads and O-ring. See Fig. 3. Remove
tubing section remaining in threaded portion of fitting.
Discard locknut.
Clean, flux and insert new tube end into remaining
portion of Compatible Fitting. Wrap valve in wet rag to
prevent damaging factory-made joints. Heat and apply
low-temperature (430 F) solder.
SWEAT CONNECTION — Frontseat unit service
valves. Relieve refrigerant pressure from tubing. Clean
and flux area around leak. Repair, using low-temperature
(430 F) solder.
Evacuate or purge evaporator coil and tubing system.
Add refrigerant charge. See Refrigerant Charging in­
structions, page 4.
Step 4 — Make Electrical Connections — Be
sure field wiring complies with loeal and national fire,
safety and electrical codes, and voltage to system is
within limits shown in Table 3. Contact local power
company for correction of improper line voltage.
NOTE: Operation of unit on improper line voltage con­
stitutes abuse and could affect Carrier warranty. See
Table 3. Do nOt install unit in system where voltage may
fluctuate above or below permissible limits.
See Table 3 for recommended fuse sizes. When making
electric connections, provide clearanee at unit for
refrigerant piping connections.
Table 3 — Electrical Data (60 Hz)
OUTDOOR
V/PH
OPER VOLTS* COMPR FAN
MCA
MAX FUSEf OR
HACR TYPE
CKT BKR AMPS
UNIT 38EN
Max Min LRA RLA FLA
015-3 36 0 6.9 1.6 100 15
018-3 53 0 10 1 1.6 14.0 20
024-3
030-3
208-230/1 254 197
65.0
88.0 130
187 1.6
2.1
17.9
24 6
30
35
036-3 97 0 21 0 2 1 28.4 45
042-3 118.0 24.2 2.5 32 7 50
048-3
060-3
230/1 254 197
110.0
150.0 25.0
35.3 2.5
2.5 33 8
46 7 50
60
030-5 70.0 103 2 1 14.9 25
036-5 78 0 128 2.1 18.1 30
042-5 208-230/3Н 254 187 90 0 15.4 2.5 21.7 35
048-5 105.0 18.3 2.5 25.4 40
060-5 136.0 20.6 2.5 28.2 45
036-6 39 0 6 1 1 1 87 15
042-6
048-6
460/3Н 508 414
45.0
35.0 83
8 8
1 3
1 3 11.7
12.3 20
20
060-6 49 0 10.4 1.3 14.3 20
FLA — Full Load Amps
HACR — Heating, Air Conditioning, Refrigeration
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
RLA — Rated Load Amps
'Permissible limits of the voltage range at which unit will operate
satisfactorily.
(Time-delay fuse
(3-Phase available only with base unit and SM option unit
NOTE: Control circuit is 24 v on all units and requires external
power source
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Bookh |4 PC101 Catalog No 563-825 PrintedinUSA Form38EN-3SI Pg3 485 12-84 Replaces: 38EN-2SI