Carrier 38EC User Manual
Page 4
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When making tubing connections, be sure to pro
vide clearance at unit for electrical connections.
REPLACE
THE
ACCURATER™
REFRIG
ERANT CONTROL PISTON IN THE INDOOR
COIL, if required, before connecting refrigerant
lines. See Carrier Cooling System Capacity Optimi
zation, page 2.
CONNECT REFRIGERANT LINES to fittings on
eondensing unit suction and liquid service valves
(Fig. 1). Unit Compatible Fittings permit mechanical
(quick connect) or sweat connections.
Model 38EC048,060 — When using 1 -1 / 8 in. field-
supplied suction line, use accessory suction line
adapter. Braze refrigerant suction line to 1-1/8 in.
end of adapter. Allow adapter to cool before insert
ing into valve. Do not allow heat to reach valve as
O-ring damage may result. Connect 3/4-in. end of
adapter to unit suetion line Compatible Fitting.
Connect liquid refrigerant line to unit. If a 7/8-in.
field-supplied suction line is used, provide a field-
supplied 3/ 4-in. to 7/ 8-in. suction line adapter. (Not
necessary if 38LS accessory tubing is used.)
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 tubing.
4.
Insert tube into Compatible Fitting until it
bottoms. Keep tube bottomed in Compatible
Fitting while tightening nut. Tighten nut until it
bottoms on shoulder of fitting or valve.
Sweat Connection or Repair — (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 tubing.
3. Insert tube in Compatible Fitting until it bottoms.
Wrap top and bottom of service valves in wet
cloth to prevent damage by heat. Solder with low-
temperature (430 F) solder.
4. Replace Schrader core and cap.
5. Evacuate or purge system using field-supplied
refrigerant.
Table 4 — Electrical Data (60 Hz)
COND
UNIT
38EC
OPER
VOLTAGE*
BRANCH CIRCUIT
V/PH
Compressor
Fan
Min Wire
Max Wire
Min Gnd
Wire Size}
Max Fuse or
HACR Type
Ckt Bkr Amps“
MCA
Max
Min
LRA
RLA
FLA
Size (AWG)t
(ft)
018300
41
9 1
14
31 5
14
20
12 6
024300
59
13 3
1 2
12
32 7
12
30
17 8
030300
208-230/1
254
197
69
16.2
10
46.0
10
35
21.5
036300
93
20 2
10
35 7
10
45
27 7
042310
108
21 7
20
8
49 9
8
50
29 5
048300
145
25 7
8
44.8
8
60
34.5
048310
060300
230/1
254
207
105
150
22 9
35 3
20
8
6
41 0
51 3
10
6
50
60
31 0
46 5
030500
60
94
1 2
14
35 3
14
20
13 0
036500
74
11 7
12
40 7
12
25
16 6
042510
048500
208-230/3
254
197
74
120
120
148
20
12
10
42 9
55 0
12
10
25
30
17 0
20 9
048510
80
163
10
50 4
10
35
22 8
060500
136
20 4
10
41 2
10
45
27 9
036600
41
5 9
14
106 9
14
15
8 6
042610
38
6 5
14
98 9
14
15
9 3
048600
460/3
506
414
60
74
1 2
14
87 6
14
15
105
048610
40
8 1
12
129 2
12
20
11 3
060600
49
102
12
97 9
12
25
14 9
f
AWG
— American \A/ire Gage
FLA
— Full Load Amps
HACR
— Heating, Air Conditioning and Refrigeration
LRA
— Locked Rotor Amps
MCA
— Minimum Circuit Amps
RLA
— Rated Load Amps
‘Permissible limits of the voltage range at which the unit will
operate satisfactorily
fCopper wire sizes based on 60C Use copper or copper-clad
aluminum wire only Use latest NEC for copper-clad aluminum
conductor sizing
^Required when using nonmetallic conduit
“Maximum dual element size
NOTES
1 Fan motors are 230 v, single phase
2 All units have 24-v control circuit which requires external
power source