Carrier COBRA 48/50HJ004-014 Installation And Service page 16

Table 1B — Electrical Data (COBRA™ Energy Recovery 50HJ004-007 Units with 62AQ060) (cont)
NOMINAL IFM
UNIT
V-PH-Hz TYPE
HIGH STATIC
50HJ006
460-3-60
(cont)
HIGH STATIC
STD
STD
208/230-3-60
HIGH STATIC
HIGH STATIC
50HJ007
STD
STD
460-3-60
HIGH STATIC
HIGH STATIC
LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM — Indoor (Evaporator) Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code
UL — Underwriters' Laboratories
*Used to determine minimum disconnect per NEC.
†Single point box CRSINGLE017A00 is part of base unit.
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. UL, Canada 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 determine the percent of voltage
imbalance.
max voltage deviation from average voltage
= 100 x
average voltage
HEAT
HEATER
CONV 62AQ
CRHEATER
OUTLET FLA
---A00
NONE
006
008
NO 9.2
009
008+008
008+009
NONE
006
008
YES 9.2
009
008+008
008+009
NONE
002 13.6/15.6
004 21.9/25.3
NO 9.2
005 33.4/38.5
004+004 43.8/50.5
004+005 55.2/63.8
NONE
002 13.6/15.6
004 21.9/25.3
YES 9.2
005 33.4/38.5
004+004 43.8/50.5
004+005 55.2/63.8
NONE
002 13.6/15.6
004 21.9/25.3
NO 9.2
005 33.4/38.5
004+004 43.8/50.5
004+005 55.2/63.8
NONE
002 13.6/15.6
004 21.9/25.3
YES 9.2
005 33.4/38.5
004+004 43.8/50.5
004+005 55.2/63.8
NONE
006
008
NO 9.2
009
008+008
008+009
NONE
006
008
YES 9.2
009
008+008
008+009
NONE
006
008
NO 9.2
009
008+008
008+009
NONE
006
008
YES 9.2
009
008+008
008+009
POWER SUPPLY
FUSE OR
FLA MCA
HACR BKR
— 20.1 25
7.2 20.1 25
13.8 26.2 30
16.8 29.9 30
27.7 43.5 45
30.7 47.2 50
— 22.8 25
7.2 22.8 25
13.8 28.3 30
16.8 32.0 35
27.7 45.6 50
30.7 49.3 50
—/— 42.0/ 42.0 50/50
42.0/ 42.0 50/50
44.1/ 48.3 50/50
58.4/ 64.9 —
71.5/ 79.9 —
85.8/ 96.4 —
—/— 48.0/ 48.0 60/60
48.0/ 48.0 60/60
48.9/ 52.5 60/60
63.2/ 69.1 —
76.3/ 84.1 —
90.6/100.6 —
—/— 43.7/ 43.7 50/50
43.7/ 43.7 50/50
45.9/ 50.1 50/60
60.3/ 66.7 —
73.3/ 81.7 —
87.6/ 98.3 —
—/— 49.7/ 49.7 60/60
49.7/ 49.7 60/60
50.7/ 54.3 60/60
65.1/ 70.9 —
78.1/ 85.9 —
92.4/102.5 —
— 19.8 25
7.2 19.8 25
13.8 25.4 30
16.8 29.1 30
27.7 42.7 45
30.7 46.4 50
— 22.5 25
7.2 22.5 25
13.8 27.5 30
16.8 31.2 35
27.7 44.8 45
30.7 48.5 50
— 20.6 25
7.2 20.6 25
13.8 26.2 30
16.8 29.9 30
27.7 43.5 45
30.7 47.2 50
— 23.3 30
7.2 23.3 30
13.8 28.3 30
16.8 32.0 35
27.7 45.6 50
30.7 49.3 50
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 allow-
able 2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact
your local electric utility company immediately.
16
SINGLE DISCONNECT SIZE*
POINT BOX
CRSINGLE
MOCP FLA
---A00
— — 20
— — 20
— — 20
— — 29
— 025 41
— 025 44
— — 26
— — 26
— — 26
— 025 33
— 025 46
— 025 49
— — 42/42
— — 42/42
— — 42/46
60/ 70 002 56/62
80/ 80 003 68/75
90/100 003 81/91
— — 48/48
— — 48/48
— — 48/51
70/ 70 003 61/66
80/ 90 003 73/80
100/110 003 86/95
— — 44/44
— — 44/44
— — 44/48
70/ 70 003 58/63
80/ 90 003 70/77
90/100 003 83/93
— — 50/50
— — 50/50
— — 50/53
70/ 80 003 63/68
80/ 90 003 75/82
100/110 003 88/97
— — 20
— — 20
— — 20
— — 28
— 025 40
— 025 44
— — 26
— — 26
— — 26
— 025 32
— 025 45
— 025 48
— — 21
— — 21
— — 21
— — 29
— 025 41
— 025 44
— — 26
— — 26
— — 26
— 025 33
— 025 46
— 025 49
452 + 464 + 455
3
1371
=
3
= 457
7
457
LRA
110
111
111
111
111
111
115
116
116
116
116
116
234/234
234/234
234/234
234/234
234/234
234/234
239/239
239/239
239/239
239/239
239/239
239/239
253/253
253/253
253/253
253/253
253/253
253/253
258/258
258/258
258/258
258/258
258/258
258/258
114
114
114
114
114
114
118
119
119
119
119
119
123
124
124
124
124
124
128
128
128
128
128
128