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
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.
Table 5—Electrical Data — 48GP
UNIT
SIZE 48GP
V-PH-HZ
VOLTAGE
RANGE
COMPRESSOR OUTDOOR FAN MOTOR INDOOR FAN MOTOR POWER SUPPLY
Min Max RLA LRA FLA FLA MCA MOCP*
024 208/230-1-60 187 253 13.5 61.0 0.8 2.0 19.7 30
030
208/230-1-60 187 253 14.7 73.0 0.8 2.1 21.3 35
208/230-3-60 187 253 9.6 63.0 0.8 2.1 14.9 20
036
208/230-1-60 187 253 15.4 83.0 0.8 3.6 23.7 35
208/230-3-60 187 253 12.2 77.0 0.8 3.6 19.7 30
460-3-60 414 506 5.1 35.0 0.8 1.9 9.1 15
042
208/230-1-60 187 253 18.6 105.0 1.6 4.1 29.0 45
208/230-3-60 187 253 13.5 77.0 1.6 4.1 22.6 35
460-3-60 414 506 6.3 39.0 0.9 2.0 10.8 15
048
208/230-1-60 187 253 20.5 109.0 1.6 4.1 31.3 50
208/230-3-60 187 253 14.7 91.0 1.6 4.1 24.1 35
460-3-60 414 506 6.5 46.0 0.9 2.0 11.0 15
060
208/230-1-60 187 253 27.6 158.0 1.6 6.2 42.3 60
208/230-3-60 187 253 18.1 137.0 1.6 6.2 30.4 45
460-3-60 414 506 9.0 62.0 0.9 3.2 15.4 20
Fig. 15—Electrical Data Legend
C99024
452=5v
457=7v
455=2v
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
average voltage
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
452 + 464 + 455
Average Voltage =
3
1371
=
3
= 457
Determine maximum deviation from average voltage.
(AB) 457
(BC) 464
(AC) 457
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
7
% Voltage Imbalance = 100 x
457
= 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.
®
Fig. 16—High- and Control-Voltage Connections
C99018
POWER
SUPPLY
FIELD-SUPPLIED
FUSED DISCONNECT
HIGH VOLTAGE
POWER LEADS
(SEE UNIT WIRING
LABEL)
GND
CONTROL BOX
SPLICE BOX
LOW-VOLTAGE
POWER LEADS
(SEE UNIT
WIRING LABEL)
W
Y
G
R
C
WHT(W1)
YEL(Y)
GRN(G)
RED(R)
BRN(C)
THERMOSTAT
(TYPICAL)
12
To Next Page
Loading...
