Carrier 50HJQ004-016 Product Data page 64
Single-package rooftop standard and high efficiency heat pump units
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50TFQ004-012 (UNITS WITH ELECTRICAL CONVENIENCE OUTLET) (CONT)
UNIT
UNIT
NOMINAL
NOMINAL
IFM
IFM
50TFQ
V-PH-Hz
TYPE
STD
STD
208/230-3-60
208/230 3 60
HIGH STATIC
HIGH-STATIC
007
007
(6 Tons)
(6 Tons)
STD
STD
460-3-60
460 3 60
HIGH STATIC
HIGH-STATIC
STD
575 3 60
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
— Maximum Overcurrent Protection
MOCP
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 pro-
tective 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
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
452 + 464 + 455
Average Voltage =
3
VOLTAGE
COMPRESSOR
RANGE
(each)
OFM
OFM IFM
FLA
Min Max
RLA
LRA
187
187
254
254
22 7
22.7
146 0
146.0
1.4
1 4
187
187
254
254
22.7
22 7
146 0
146.0
1 4
1.4
414
414
508
508
11 4
11.4
73 0
73.0
0 7
0.7
414
414
508
508
11 4
11.4
73.0
73 0
0.7
0 7
518
632
9.1
58.4
0.7
518
632
9.1
58.4
0.7
ELECTRIC
HEAT*
IFM
FLA
Nominal
FLA
MCA
kW**
—
—
40.4/ 40.4
4.9/ 6.5
13.6/15.6
57.4/ 59.9
7.9/10.5
21.9/25.3
67.8/ 72.0
5.8
5 8
12.0/16.0
33.3/38.5
82.0/ 88.5
15.8/21.0
43.9/50.5
95.3/103.5
19.9/26.5
55.2/63.8
109.4/120.1
—
—
42.1/ 42.1
4.9/ 6.5
13.6/15.6
59.1/ 61.6
7.9/10.5
21.9/25.3
69.5/ 73.7
7.5
7 5
12.0/16.0
33.3/38.5
83.7/ 90.2
15.8/21.0
43.9/50.5
97.0/105.2
19.9/26.5
55.2/63.8
111.1/121.8
—
—
6.0
7.2
11.5
13.8
2 6
2.6
14.0
16.8
23.0
27.7
25.5
30.7
—
—
6.0
7.2
11.5
13.8
3.4
3 4
14.0
16.8
23.0
27.7
25.5
30.7
2.6
—
—
3.4
—
—
1371
=
3
=
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 maxi-
mum allowable 2%.
IMPORTANT:If the supply voltage phase imbalance is more
than 2%, contact your local electrical utility company
immediately.
POWER EXHAUST ELECTRICAL DATA
POWER EXHAUST
MCA
PART NO.
(230 v)
CRPWREXH021A01
N/A
CRPWREXH022A01
3.4
CRPWREXH023A01
N/A
CRPWREXH028A01
1.7
CRPWREXH029A01
N/A
CRPWREXH030A01
1.6
N/A — Not available
NOTE: If a single power source is to be used, size wire to include power ex-
haust MCA and MOCP.
Check MCA and MOCP when power exhaust is powered through the unit.
Determine the new MCA including the power exhaust using the following for-
mula:
MCA New = MCA unit only + MCA of Power Exhaust
For example, using a 50TFQ006---5 unit with MCA = 35.6 and MOCP = 40,
with CRPWREXH030A01 power exhaust.
MCA New = 35.6 amps + 1.6 amps = 37.2 amps
If the new MCA does not exceed the published MOCP, then MOCP would
not change. The MOCP in this example is 40 amps and the MCA New is be-
low 40; therefore the MOCP is acceptable. If "MCA New" is larger than the
published MOCP, raise the MOCP to the next larger size. In all cases, the
MOCP for the power exhaust should be 15 amps per NEC.
64
DISCONNECT
POWER SUPPLY
SIZE†
MOCP
FLA
45/ 45††
40/ 40
56/ 58
60/ 60††
70/ 80
65/ 69
90/ 90
78/ 84
100/110
90/ 98
110/125
103/113
42/ 42
45/ 45††
60/ 70
58/ 60
67/ 71
70/ 80
90/100
80/ 86
100/110
92/100
105/115
125/125
19.7
20††
19
28.7
30††
28
37.0
40††
35
40.7
45††
39
54.4
60††
51
58.1
60††
55
20.5
25††
20
29.5
30††
29
37.8
40††
36
41.5
45††
40
55.2
60††
52
58.9
60††
56
15.8
20††
16
16.4
20††
16
7
457
MOCP
MCA
MCA
(for separate
(460 v)
(575 v)
power source)
0.68
N/A
15
N/A
1.32
15
1.4
N/A
15
N/A
0.68
15
0.7
N/A
15
N/A
0.64
15
LRA
195/195
208/211
217/220
228/233***
239/245***
250/259***
214/214
227/229
236/239
247/252***
258/264***
269/278***
97
104
111
114
125
128
107
114
121
124
134
137
78
85
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