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Table 3A — Electrical Data (Units Without Electrical Convenience Outlet) (cont)
50TFQ
NOMINAL
IFM
UNIT
V-PH-Hz
TYPE
SIZE
STD
208/230-3-60
HIGH-STATIC
007
(6 Tons)
STD
460-3-60
HIGH-STATIC
STD
575-3-60
HIGH-STATIC
LEGEND
FLA
— Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM
— Indoor Fan Motor
LRA
— Locked Rotor Amps
MCA
— Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC
— National Electrical Code
OFM
— Outdoor Fan Motor
RLA
— Rated Load Amps
*Heaters are field installed only.
†Used to determine minimum disconnect size per NEC.
**Heater capacity (kW) is based on heater voltage of 208 v, 240 v and 480 v.
If power distribution voltage to unit varies from rated heater voltage, heater
kW will vary accordingly.
††Fuse or HACR circuit breaker.
***Optional disconnect switch is unavailable.
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.
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 determine the percent of volt-
age imbalance.
VOLTAGE
COMPRESSOR
RANGE
(each)
OFM
FLA
Min
Max
RLA
LRA
187
254
22.7
146.0
1.4
187
254
22.7
146.0
1.4
414
508
11.4
73.0
0.7
414
508
11.4
73.0
0.7
518
632
9.1
58.4
0.7
518
632
9.1
58.4
0.7
ELECTRIC HEAT*
IFM
FLA
Nominal
FLA
kW**
—
—
35.6/ 35.6
4.9/ 6.5
13.6/15.6
52.6/ 55.1
7.9/10.5
21.9/25.3
63.0/ 67.2
5.8
12.0/16.0
33.3/38.5
77.2/ 83.7
15.8/21.0
43.9/50.5
90.5/ 98.7
19.9/26.5
55.2/63.8
104.6/115.3
—
—
37.3/ 37.3
4.9/ 6.5
13.6/15.6
54.3/ 56.8
7.9/10.5
21.9/25.3
64.7/ 68.9
7.5
12.0/16.0
33.3/38.5
78.9/ 85.4
15.8/21.0
43.9/50.5
92.2/100.4
19.9/26.5
55.2/63.8
106.3/117.0
—
—
6.0
7.2
11.5
13.8
2.6
14.0
16.8
23.0
27.7
25.5
30.7
—
—
6.0
7.2
11.5
13.8
3.4
14.0
16.8
23.0
27.7
25.5
30.7
2.6
—
—
3.4
—
—
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
Determine maximum deviation from average voltage.
(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
% Voltage Imbalance = 100 x
= 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%, con-
tact your local electric utility company immediately.
12
DISCONNECT
POWER SUPPLY
SIZE†
MCA
MOCP
FLA
40/ 40††
34/ 34
60/ 60††
50/ 52
70/ 70
60/ 63
80/ 90
73/ 79
100/100
85/ 92
110/125
98/108
40/ 40††
36/ 36
60/ 60††
52/ 54
70/ 70
62/ 65
80/ 90
75/ 81
100/110
87/ 94
110/125
100/110
17.6
20††
17
26.6
30††
25
34.8
35††
33
38.6
40††
36
52.2
60††
49
55.9
60††
52
18.4
20††
18
27.4
30††
26
35.6
40††
34
39.4
40††
37
53.0
60††
50
56.7
60††
53
14.0
15††
14
14.7
15††
14
average voltage
452 + 464 + 455
3
1371
=
3
=
457
7
457
LRA
190/190
204/206
212/215
223/229
234/241***
245/254***
209/209
223/225
231/234
242/248***
253/260***
264/273***
95
102
109
112
123
126
105
112
118
121
132
135
76
84
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