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KG/KC 024, 030, 036, 048, 060, 072, 074, 090
TABLE 5
DRIVE COMPONENT MANUFACTURER'S NUMBERS
Drive No.
DRIVE COMPONENTS
MOTOR PULLEY BLOWER PULLEY BELTS
Browning No. OEM Part No. Browning No. OEM Part No. Browning No. OEM Part No.
A01 1VP34 X 7/8 31K6901 AK54 X 1 100244-19 A40 100245-17
A02 1VP34 X 7/8 31K6901 AK49 X 1 100244-18 A39 100245-16
A03 1VP34 X 7/8 31K6901 AK44X 1 100244-16 A39 100245-16
A04 1VP40 X 7/8 79J0301 AK49 X 1 100244-18 A41 100245-18
A05 1VP34 X 7/8 31K6901 AK41 X 1 100244-15 A38 100245-15
A06 1VP44 X 7/8 P-8-1488 AK51 X 1 18L2201 A41 100245-18
A07 1VP50 X 7/8 53J1501 AK54 X 1 100244-19 AX43 73K8201
A08 1VP44 X 7/8 P-8-1488 AK46 X 1 100244-17 A40 100245-17
AA01 1VP34 X 7/8 31K6901 AK69 X 1 37L4701 A51 13H0101
AA02* 1VP40 X 7/8 79J0301 BK80H 100788-03 A53 P-8-4951
AA03 1VP40 X 7/8 79J0301 AK59 X 1 31K6801 A50 100245-29
AA04 1VP44 X 7/8 P-8-1488 AK59 X 1 31K6801 A51 13H0101
*Split bushing supplier no.: H1; OEM no. 10073-04
Cooling Start-Up
A-Operation
1- Initiate first and second stage cooling demands
according to instructions provided with thermostat.
See table 6 for operation.
Note - KG/KC 074 units are equipped with two-stage
compressors.
TABLE 6
COOLING OPERATION
T'Stat
Demand
Energized
024-072 No Economizer or Outdoor Air Unsuitable
Y1 Compressor Condenser Fan
Y2 Compressor Condenser Fan
024-072 Unit Equipped With An Economizer
Y1 Economizer na
Y2 Economizer + Compressor Condenser Fan
074 No Economizer or Outdoor Air Unsuitable
Y1 Compressor Low Speed* Condenser Fan
Y2 Compressor High Speed** Condenser Fan
074 Unit Equipped With An Economizer
Y1 Economizer na
Y2
Economizer + Compressor
Low Speed*
Condenser Fan
*67% of full capacity **100% of full capacity
2- Units contain one refrigerant circuit or stage.
3- Unit is charged with R-410A refrigerant. See unit
rating plate for correct amount of charge.
4- Refer to Refrigerant Charge and Check section for
proper method to check refrigerant charge.
B-Three Phase Scroll Compressor Voltage Phasing
Three phase scroll compressors must be phased
sequentially to ensure correct compressor and blower
rotation and operation. Compressor and blower are wired
in phase at the factory. Power wires are color-coded as
follows: line 1-red, line 2-yellow, line 3-blue.
1- Observe suction and discharge pressures and
blower rotation on unit start-up.
2- Suction pressure must drop, discharge pressure
must rise and blower rotation must match rotation
marking.
If pressure differential is not observed or blower rotation is
not correct:
3- Disconnect all remote electrical power supplies.
4- Reverse any two field-installed wires connected to
the line side of K1 contactor. Do not reverse wires at
blower contactor.
5- Make sure the connections are tight.
Discharge and suction pressures should operate at
their normal start‐up ranges.
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