76
Table 54 – (cont.) MCA/MOCP DETERMINATION W/ PWRD C.O.
UN
IT
N
O
M
.V
---
P
H
---
H
Z
IFM
TYPE
ELECTRIC HEATER
W/PWRD C.O.
Nom*
(kW)
FLA
NO P.E.
w/ P.E. (pwrd fr/unit)
MCA
MOCP
DISC. SIZE
MCA
MOCP
DISC. SIZE
FLA
LRA
FLA
LRA
50TC*
A07
208/
230
---
3
---
60
STD
None
None
35.3
50
35
162
37.2
50
37
164
4.9/6.5
13.6/15.6
35.3/35.3
50/50
35/35
162/162
37.2/37.2
50/50
37/37
164/164
7.9/10.5
21.9/25.3
39.9/44.1
50/50
37/41
162/162
42.3/46.5
50/50
39/43
164/164
12.0/16.0
33.4/38.5
54.3/60.6
60/70
50/56
162/162
56.6/63.0
60/70
52/58
164/164
15.8/21.0
43.8/50.5
67.3/75.6
70/80
62/70
162/162
69.6/78.0
70/80
64/72
164/164
19.9/26.5
55.2/63.8
81.5/92.3
90/100
75/85
162/162
83.9/94.6
90/100
77/87
164/164
MED
None
None
37.6
50
38
188
39.5
50
40
190
4.9/6.5
13.6/15.6
37.6/37.6
50/50
38/38
188/188
39.5/39.5
50/50
40/40
190/190
7.9/10.5
21.9/25.3
42.8/47.0
50/50
39/43
188/188
45.1/49.4
50/50
42/45
190/190
12.0/16.0
33.4/38.5
57.1/63.5
60/70
53/58
188/188
59.5/65.9
60/70
55/61
190/190
15.8/21.0
43.8/50.5
70.1/78.5
80/80
65/72
188/188
72.5/80.9
80/90
67/74
190/190
19.9/26.5
55.2/63.8
84.4/95.1
90/100
78/88
188/188
86.8/97.5
90/100
80/90
190/190
HIGH
None
None
37.6
50
38
188
39.5
50
40
190
4.9/6.5
13.6/15.6
37.6/37.6
50/50
38/38
188/188
39.5/39.5
50/50
40/40
190/190
7.9/10.5
21.9/25.3
42.8/47.0
50/50
39/43
188/188
45.1/49.4
50/50
42/45
190/190
12.0/16.0
33.4/38.5
57.1/63.5
60/70
53/58
188/188
59.5/65.9
60/70
55/61
190/190
15.8/21.0
43.8/50.5
70.1/78.5
80/80
65/72
188/188
72.5/80.9
80/90
67/74
190/190
19.9/26.5
55.2/63.8
84.4/95.1
90/100
78/88
188/188
86.8/97.5
90/100
80/90
190/190
46
0
---
3
---
60
STD
None
None
17.7
25
18
81
18.7
25
19
82
6.0
7.2
17.7
25
18
81
18.7
25
19
82
11.5
13.8
23.3
25
21
81
24.5
25
23
82
14.0
16.8
27.0
30
25
81
28.3
30
26
82
23.0
27.7
40.6
45
37
81
41.9
45
39
82
25.5
30.7
44.4
45
41
81
45.6
50
42
82
MED
None
None
18.5
25
19
94
19.5
25
20
95
6.0
7.2
18.5
25
19
94
19.5
25
20
95
11.5
13.8
24.3
25
22
94
25.5
30
23
95
14.0
16.8
28.0
30
26
94
29.3
30
27
95
23.0
27.7
41.6
45
38
94
42.9
45
39
95
25.5
30.7
45.4
50
42
94
46.6
50
43
95
HIGH
None
None
19.5
25
20
103
20.5
30
21
104
6.0
7.2
19.5
25
20
103
20.5
30
21
104
11.5
13.8
25.5
30
23
103
26.8
30
25
104
14.0
16.8
29.3
30
27
103
30.5
35
28
104
23.0
27.7
42.9
45
39
103
44.1
45
41
104
25.5
30.7
46.6
50
43
103
47.9
50
44
104
57
5
---
3
---
60
STD
None
None
13.6
20
13
65
15.5
20
16
67
MED
None
None
14.4
20
14
76
16.3
20
17
78
HIGH
None
None
14.4
20
14
76
16.3
20
17
78
* Nominal valves, listed as 208/240V, 480V or 600V as appropriate.
LEGEND:
C.O.
--- Convenient outlet
DISC
--- Disconnect
FLA
--- Full load amps
IFM
--- Indoor fan motor
LRA
--- Locked rotor amps
MCA
--- Minimum circuit amps
MOCP
--- Maximum over current protection
P.E.
--- Power exhaust
UNPWRD C.O. --- Unpowered convenient outlet
NOTES
:
1. In compliance with NEC requirements for multimotor and
combination load equipment (refer to NEC Articles 430 and
440), the overcurrent protective device for the unit shall be
fuse or HACR breaker. Canadian units may be fuse or cir-
cuit breaker.
2.
Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply
voltage is greater than 2%. Use the following formula to de-
termine the percentage of voltage imbalance.
% Voltage Imbalance
= 100 x
max voltage deviation from average voltage
average voltage
Example: Supply voltage is 230-3-60
AB = 224 v
BC = 231 v
AC = 226 v
Average Voltage =
(224 + 231 + 226)
=
681
3
3
=
227
Determine maximum deviation from average voltage.
(AB) 227 – 224 = 3 v
Maximum deviation is 4 v.
(BC) 231 – 227 = 4 v
Determine percent of voltage imbal-
ance.
% Voltage Imbalance
= 100 x
4
227
= 1.76%
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.
50TC
Summary of Contents for 50TC Series
Page 23: ...23 CURBS WEIGHTS DIMENSIONS CHASSIS 1 C08529 Fig 1 Dimensions 50TC 04 07 50TC ...
Page 25: ...25 CURBS WEIGHTS DIMENSIONS CHASSIS 2 C08531 Fig 6 Dimensions 50TC 08 12 50TC ...
Page 27: ...27 CURBS WEIGHTS DIMENSIONS CHASSIS 3 C08533 Fig 11 Dimensions 50TC 14 50TC ...
Page 84: ...84 C08536 Fig 25 2 Stage Cooling Typical Power Diagram 50TC ...
Page 86: ...86 C08576 Fig 27 2 Stage Typical Wiring Diagram 50TC ...