Carrier 50TFQ008-012 Installation, Start-Up And Service Instructions Manual page 11

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