Carrier 50TFQ008-012 User Manual
Page 11
11
Table 3B — Electrical Data (Units With Electrical Convenience Outlet) (cont)
LEGEND
*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, 480 v, and 575 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 voltage imbalance.
% Voltage Imbalance
Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
= 457
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%.
50TFQ
UNIT SIZE
NOMINAL
V-PH-Hz
IFM
TYPE
VOLTAGE
RANGE
COMPRESSOR
(each)
OFM
FLA
IFM
FLA
ELECTRIC
HEAT*
POWER SUPPLY
DISCONNECT
SIZE†
Min
Max
RLA
LRA
Nominal
kW**
FLA
MCA
MOCP
FLA
LRA
012
(10 Tons)
208/230-3-60
STD
187
254
17.2
124.0
1.4
5.8
—
—
52.1/ 52.1
60/ 60††
55/ 55
300/300
7.8/10.4
21.7/ 25.0
79.2/ 83.4
80/ 90
80/ 84
322/325***
12.0/16.0
33.3/ 38.5
93.7/100.2
100/110
93/ 99
333/338***
24.0/32.0
66.6/ 77.0
135.4/148.4
150/150
132/144
366/377***
31.8/42.4
88.3/102.0
162.5/179.6
175/200
157/172
388/402***
37.6/50.0
104.4/120.3
182.6/172.4
200/200
175/193
404/420***
ALT
187
254
17.2
124.0
1.4
7.5
—
—
53.8/ 53.8
60/ 60††
57/ 57
319/319
7.8/10.4
21.7/ 25.0
80.9/ 85.1
90/ 90
82/ 86
341/344***
12.0/16.0
33.3/ 38.5
95.4/101.9
100/110
95/101
352/357***
24.0/32.0
66.6/ 77.0
137.1/150.1
150/175
134/145
385/396***
31.8/42.4
88.3/102.0
164.2/181.3
175/200
158/174
407/421***
37.6/50.0
104.4/120.3
184.3/174.1
200/200
177/195
423/439***
HIGH-STATIC
187
254
17.2
124.0
1.4
15.0
—
—
61.3/ 61.3
70/ 70
66/ 66
367/367
7.8/10.4
21.7/ 25.0
88.4/ 92.6
90/100
91/ 94
389/392***
12.0/16.0
33.3/ 38.5
102.9/109.4
110/110
104/110
400/405***
24.0/32.0
66.6/ 77.0
144.6/157.6
150/175
142/154
433/444***
31.8/42.4
88.3/102.0
171.7/188.8
175/200
167/183
455/459***
37.6/50.0
104.4/120.3
191.8/181.6
200/200
186/204
471/487***
460-3-60
STD
414
508
8.6
59.6
0.7
2.6
—
—
25.5
30††
27
145
16.5
19.8
50.3
60††
50
165
27.8
33.4
67.3
70
65
178
33.0
39.7
75.2
80
73
185
41.7
50.2
88.3
90
85
195***
50.0
60.1
85.6
90
96
205***
ALT
414
508
8.6
59.6
0.7
3.4
—
—
26.3
30††
28
185
16.5
19.8
51.1
60††
51
204
27.8
33.4
68.1
70
66
218
33.0
39.7
76.0
80
73
224
41.7
50.2
89.1
90
86
235***
50.0
60.1
86.4
90
97
245***
HIGH-STATIC
414
508
8.6
59.6
0.7
7.4
—
—
30.3
35††
32
179
16.5
19.8
55.1
60††
55
198
27.8
33.4
72.1
80
71
212
33.0
39.7
80.0
80
78
218
41.7
50.2
93.1
100
90
229***
50.0
60.1
90.4
100
102
239***
575-3-60
STD
518
632
6.9
49.4
0.7
2.6
—
—
20.5
25††
22
120
17.0
17.1
41.8
45††
41
137
34.0
34.1
63.1
70
61
154
51.0
51.2
71.7
80
80
171***
ALT
518
632
6.9
49.4
0.7
3.4
—
—
21.1
25††
22
151
17.0
17.1
42.5
45††
42
168
34.0
34.1
63.7
70
62
185
51.0
51.2
72.3
80
81
202***
HIGH-STATIC
518
632
6.9
49.4
0.7
7.4
—
—
24.3
25††
26
146
17.0
17.1
45.7
50††
46
163
34.0
34.1
66.9
70
65
180
51.0
51.2
75.5
80
85
198***
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
= 100 x
max voltage deviation from average voltage
average voltage
Average Voltage =
452 + 464 + 455
3
=
1371
3
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local
electric utility company immediately.
7
457