Carrier 48SS - Manual (Page 23)

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UNIT
48SS
VOLTAGE
COMPRESSOR
COND.
FAN
INDOOR POWER SUPPLY AWG 60 C MAX WIRE
V-PH-HZ RANGE
MOTOR
FAN MIN WIRE LENGTH
FLA SIZEt (ft)
Min Max RLA LRA FLA MCA MOCP*
0 T8 ......7 6
45
‘“07* ......... 120 15 14 75
024 124 61 0 7 20 182 30 12 80
030 14 4 82 1 4 20 21 8 30 10 100
036 208/230-1-60 187 253 18 0 96 1 4 28 26 7 40 10 90
042 20 4 104 1 4 40 30 9 50 8 100
048 26 4 129 2 1 50 40 1 60 6 100
060 32 1 169 2 1 68 49 0 60 6 100
030 94 66 1 4 20 15 5 25 12 80
036 11 7 75 1 4 28 18 8 30 12 65
042 208/230-3-60 187 253 14 0 91 1 4 40 22 9 35 10 85
048 15 0 99 2 1 50 25 9 40 10 75
060 19 3 123 2 1 68 33 0 50 8 90
036 5 6 40 0 8 1 4 92 10 14 100
042
048
460-3-60 414 506
64
82 42
50 0 8
1 1
20
23 10 8
13 7 15
20 14
14 100
100
060 10 0 62 1 1 32 16 8 25 12 100
LEGEND
AWG — American Wire Gage
FLA — Full Load Amps
HACR — Heating, Air Conditioning
and Refrigeration
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent
Protection
NEC — National Electrical Code
RLA — Rated Load Amps
‘Fuse or HACR breaker
tMinimum wire size is based on 60 C copper wire If other than 60 C
wire is used, determine size from NEC Voltage drop of wire must be
less than 2% of rated voltage
NOTES:
1
In compliance with NEC requirements for multimotor and combina­
tion load equipment (refer to NEC Articles 430 and 440), the over­
current protective device for the unit shall be fuse or HACR breaker
The CSA units may be fuse or circuit breaker
2 Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in suppiy voitage
is greater than 2% Use the following formula to determine the per­
cent voltage imbalance
% Voltage Imbalance
max voltage deviation from average voltage
Example Supply voltage is 460-3-60
AB = 452 V
BC = 464 V
AC = 455 V
Average Voltage =
452 -I- 464 + 455
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 voltage imbalance
% Voltage Imbalance = 100 x ——
457
= 1 53%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%
100 x
IMPORTANT: If the supply voltage phase imbalance is more
than 2%, contact your local electric utility company immediately
average voltage
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