Table 3--Electrical Data--50ZH
UNiT 50ZR
SIZE
(-SERIES, IF
USED)
O3O
036
042
048
060
VOLTAGE
RANGE
OFM IFM
V-PH-HZ
208/230-3-8
208/230-3-80
480-3-60
208/230-3-80
460-3-80
208/230-3-80
460-3-80
208/230-3-80
480-3-80
MIN
187
187
414
187
414
187
414
187
414
(See legend following Electrical Data charts)
COMPRESSOR
FLA
LRA
FLA
ELECTRIC HEAT
Nominal KW* FLA
-/-
10.4/12.0
20.8/24.1
31.3/36.1
-/-
10.4/12.0
20.8/24.1
31.3/36.1
6.0
12.0
18.0
-/-
10.5/12.0
20.8/24.1
31.4/36.1
41.4/47.9
6.0
12.0
18.0
24.1
-/-
10.5/12.0
20.8/24.1
31.4/36.1
41.4/47.9
6.0
12.0
18.0
24.1
-/-
10.5/12.0
20.8/24.1
31.4/36.1
41.4/47.9
6.0
12.0
18 .0
23.9
SINGLE POINT POWER SUPPLY
MCA
FUSE OR
CKT BKR
20
35/35
45/50
60/-
25/25
35/35
45/50
60/-
15
2O
25
35
30/30
35/40
50/50
15
2O
3O
35
45
25/25
35/40
50/60
15
2O
3O
35
45
35/35
45/45
60/60
2O
25
3O
4O
45
MAX RLA
254 10.0
254 11.4
508 5.7
254 13.9
508 6.8
254 12.8
508 6.4
254 15.9
508 8.0
-/-
3.8/5.0
63.0 1.5 5.8 7.5/10.0
11.3/15.0
-/-
3.8/5.0
77.0 1.5 2.8
7.5/10.0
11.3/15.0
5
39.0 0.8 1.5
10
15
-/-
3.8/5.0
88.0 1.5 2.8 7.5/10.0
11.3/15.0
15/20
5
44.0 0.8 1.5 10
15
2O
-/-
3.8/5.0
93.0 1.5 4.2 7.5/10.0
11.3/15.0
15/20
5
46.5 0.8 2.1 10
15
2O
-/-
3.8/5.0
124.0 3.1 6.2 7.5/10.0
11.3/15.0
14.9/19.9
5
59.6 1.5 3.2 10
15
19.9
16.8
29.9/31.8
42.8/46.9
56.1/61.9
18.6/18.6
31.7/33.6
44.6/48.7
57.8/63.7
9.9
16.9
24.4
31.9
21.7/21.7
34.8/36.7
47.7/51.8
60.9/66.8
73.4/81.6
10.8
18.3
25.8
33.3
40.9
21.7/21.70
34.8/36.7
47.7/51.8
61.0/66.8
73.7/81.8
10.9
18.4
25.9
33.4
41.0
29.2/29.2
42.3/44.2
55.2/59.3
68.4/74.3
81.2/89.3
14.7
22.2
29.7
37.2
44.6
MOCP
-/70
-/70
70/70
80/90
70/70
80/90
70/80
90/90
LE ENO CQ US
FLA -- Full Load Amps
LRA -- Locked Rotor Amps
MCA -- Minimum Circuit Amps
MOCP -- Maximum Overcurrent Protection
RLA -- Rated Load Amps
CKT BKR -- Circuit Breaker
NOTES:
1. In compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NEC
Articles 430 and 440), the overcurrent protective device for the
unit shall be Power Supply fuse. Canadian units may be
fuse or circuit breaker.
2. Minimum wire size is based on 60 C copper wire. If other than
60 C wire is used, or if length exceeds wire length in table,
determine size from NEC.
3. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply volt-
age is greater than 2%. Use the following formula to determine
the percentage of voltage imbalance.
% Voltage imbalance
= 100 x max voltage deviation from average voltage
average voltage
EXAMPLE: Supply voltage is 460-3-60.
A B C AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
_ 1371
3
= 457
Determine maximum deviation from average voltage.
(AB) 457 452=5v
(B0) 464 457=7v
(AC) 457 455 =2v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
7
% Voltage Imbalance = 100 x --
457
= 1.53%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately.
15
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