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13
Step 6 — Wire Field Power Supply
Connections
ELECTRICAL–LINE VOLTAGE — All field-installed wir-
ing, including electrical ground, must comply with the National
Electrical Code (NEC) as well as all applicable local codes. Re-
fer to Tables 4 and 5 for fuse sizes. Refer to Table 6 for blower
speed wiring. See Fig. 10 for field connections or the electrical
diagram located on the back of the electrical compartment front
panel. All electrical connections must be made by the installing
(or electrical) contractor. All final electrical connections must
be made with a length of flexible conduit to minimize vibration
and sound transmission to the building.
General Line Voltage Wiring — Be sure the available
power is the same voltage and phase shown on the unit
serial plate. Line and low voltage wiring must be done in
accordance with local codes or the NEC, whichever is appli-
cable.
POWER CONNECTION
Units Equipped with Disconnect — Connect incoming line
voltage to the disconnect switch and ground wire to the ground
lug provided inside the electrical compartment.
Units without Disconnect — Line voltage connection is made
by connecting the incoming line voltage wires to the line
side(s) of the contactor.
208/230-VAC OPERATION — All commercial 208/230-v
units are factory wired for 208-v single-phase operation. For
230-v single-phase operation the primary voltage to the trans-
former must be changed. Remove the red lead from the com-
pressor contactor capping it with a wire nut and connecting the
orange 230-vac lead wire from the transformer to the compres-
sor contactor.
NOTE: Failure to change the primary voltage lead when using
240-vac line voltage may result in electrical component dam-
age and intermittent system failure.
Table 4 — Cabinet Electrical Data — 50VS Unit
LEGEND
Table 5 — Chassis Electrical Data — 50VS Unit
LEGEND
Table 6 — 50VS Unit Blower Performance and Speed Wiring
NOTE: Operation not recommended in shaded area.
WARNING
Electrical shock can cause personal injury or death. When
installing or servicing system, always turn off main power
to system. There may be more than one disconnect switch.
UNIT
SUPPLY
VOLTAGE
V-Hz-Ph
MOTOR
VOLTAGE
V-Hz-Ph
FAN MOTOR
FLA (A)
MOTOR POWER (W)
MIN CIRCUIT
AMP
MAX FUSE SIZE (A)
50VSA,B
208/230-1-60
208/230-1-60
0.30
130
6.2
15
50VSC,D
208/230-1-60
208/230-1-60
0.40
142
8.3
15
50VSE,F
208/230-1-60
208/230-1-60
0.88
180
13.3
25
50VSG,H
208/230-1-60
208/230-1-60
1.18
240
13.6
25
50VSI,J
208/230-1-60
208/230-1-60
1.60
304
15.1
25
50VSK,L
208/230-1-60
208/230-1-60
1.80
368
22.4
35
50VSM,N
208/230-1-60
208/230-1-60
2.06
442
25.3
40
FLA
—
Full Load Amps
UNIT
SUPPLY
VOLTAGE
V-Hz-Ph
MIN
CIRCUIT
AMP
MAX FUSE
SIZE
(A)
COMPRESSOR
(LRA)
COMPRESSOR
(RLA)
COOLING
CURRENT
(A)
MAX COOLING
CURRENT
(A)
HEATING
CURRENT
(A)
MAX HEATING
CURRENT
(A)
50VSA,B
208/230-1-60
6.2
15
20
4.7
3.27
4.0
3.75
4.60
50VSC,D
208/230-1-60
8.3
15
27
6.3
4.40
4.0
5.25
6.25
50VSE,F
208/230-1-60
13.3
25
42
9.9
6.30
5.4
7.07
8.80
50VSG,H
208/230-1-60
13.6
25
42
9.9
6.70
7.6
7.50
9.00
50VSI,J
208/230-1-60
15.1
25
46
10.8
8.20
8.0
9.20
11.70
50VSK,L
208/230-1-60
22.4
35
70
16.5
11.00
10.4
12.20
14.10
50VSM,N
208/230-1-60
25.3
40
79
18.6
12.70
16.0
13.65
16.50
LRA
—
Locked Rotor Amps
RLA
—
Rated Load Amps
UNIT
FAN SPEED
AND WIRING
RATED
CFM
MIN
CFM
EXTERNAL STATIC PRESSURE (in. wg)
0
0.01
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
50VSA,B
LOW (Black)
360
260
361
358
341
321
294
268
235
177
HI (Blue)
316
310
294
278
262
233
206
50VSC,D
LOW (Blue)
420
300
424
421
398
376
350
315
280
240
HI (Red)
361
358
341
321
305
50VSE,F
LOW (Black)
540
390
551
549
535
521
509
490
476
460
441
420
400
HI (Blue)
470
465
455
439
428
412
397
50VSG,H
LOW (Blue)
630
455
626
622
604
592
577
561
548
530
513
495
476
HI (Red)
551
549
535
521
509
490
476
460
50VSI,J
LOW (Orange)
820
600
821
817
814
812
802
790
775
747
684
654
621
HI (Brown)
768
765
762
759
751
742
722
683
653
625
50VSK,L
LOW (Black)
1080
780
1081
1075
1070
1049
1024
931
880
843
801
HI (Blue)
956
951
942
928
911
835
809
50VSM,N
LOW (Blue)
1220
850
1222
1219
1194
1160
1129
1088
1057
1017
961
HI (Red)
1102
1096
1091
1070
1044
949
897
860
311