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UNIT
V-PH-HZ
SIZE 48GP
024
208/230-1-60
208/230-1-60
030
208/230-3-60
208/230-1-60
036
208/230-3-60
460-3-60
208/230-1-60
042
208/230-3-60
460-3-60
208/230-1-60
048
208/230-3-60
460-3-60
208/230-1-60
060
208/230-3-60
460-3-60
LEGEND
FLA
— Full Load Amps
LRA
— Locked Rotor Amps
MCA
— Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
RLA
— Rated Load Amps
NOTES:
1. In compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NEC
Articles 430 and 440), the overcurrent protective device for the
unit shall be Power Supply fuse . The CGA (Canadian Gas
Association) units may be fuse or circuit breaker.
2. Minimum wire size is based on 60 C copper wire. If other than
60 C wire is used, or if length exceeds wire length in table,
determine size from NEC.
3. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply volt-
age is greater than 2%. Use the following formula to determine
the percentage of voltage imbalance.
% Voltage imbalance
max voltage deviation from average voltage
= 100 x
CONTROL VOLTAGE CONNECTIONS
NOTE: Do not use any type of power-stealing thermostat. Unit
control problems may result.
Use no. 18 American Wire Gage (AWG) color-coded, insulated
(35 C minimum) wires to make the control voltage connections
between the thermostat and the unit. If the thermostat is located
more than 100 ft from the unit (as measured along the control
voltage wires), use no. 16 AWG color-coded, insulated (35 C
minimum) wires.
STANDARD CONNECTION — Remove knockout hole located
in the flue panel adjacent to the control access panel. See Fig. 6
and 7. Remove the rubber grommet from the installer's packet
(included with unit) and install grommet in the knockout opening.
Provide a drip loop before running wire through panel.
Run the low-voltage leads from the thermostat, through the inlet
hole, and into unit low-voltage splice box.
Locate five 18-gage wires leaving control box. These low-voltage
connection leads can be identified by the colors red, green, yellow,
brown, and white. (See Fig. 16.) Ensure the leads are long enough
to be routed into the low-voltage splice box (located below right
side of control box). Stripped yellow wire is located in connection
Table 5—Electrical Data — 48GP
VOLTAGE
COMPRESSOR
RANGE
Min
Max
RLA
LRA
187
253
13.5
61.0
187
253
14.7
73.0
187
253
9.6
63.0
187
253
15.4
83.0
187
253
12.2
77.0
414
506
5.1
35.0
187
253
18.6
105.0
187
253
13.5
77.0
414
506
6.3
39.0
187
253
20.5
109.0
187
253
14.7
91.0
414
506
6.5
46.0
187
253
27.6
158.0
187
253
18.1
137.0
414
506
9.0
62.0
®
average voltage
Fig. 15—Electrical Data Legend
OUTDOOR FAN MOTOR
INDOOR FAN MOTOR
FLA
0.8
0.8
0.8
0.8
0.8
0.8
1.6
1.6
0.9
1.6
1.6
0.9
1.6
1.6
0.9
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.
HIGH VOLTAGE
POWER LEADS
(SEE UNIT WIRING
LABEL)
CONTROL BOX
LOW-VOLTAGE
POWER LEADS
(SEE UNIT
WIRING LABEL)
SPLICE BOX
Fig. 16—High- and Control-Voltage Connections
box. Route leads through hole in bottom of control box and make
low-voltage connections as shown in Fig. 16. Secure all cut wires,
so that they do not interfere with operation of unit.
12
POWER SUPPLY
FLA
MCA
2.0
19.7
2.1
21.3
2.1
14.9
3.6
23.7
3.6
19.7
1.9
9.1
4.1
29.0
4.1
22.6
2.0
10.8
4.1
31.3
4.1
24.1
2.0
11.0
6.2
42.3
6.2
30.4
3.2
15.4
452 + 464 + 455
3
1371
=
3
= 457
7
457
FIELD-SUPPLIED
FUSED DISCONNECT
GND
WHT(W1)
W
YEL(Y)
Y
GRN(G)
G
RED(R)
R
BRN(C)
C
MOCP*
30
35
20
35
30
15
45
35
15
50
35
15
60
45
20
C99024
POWER
SUPPLY
THERMOSTAT
(TYPICAL)
C99018
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