292427-BIM-A-0307
Unitary Products Group
11
EXPANSION VALVE BULB
The expansion valve bulb must be fastened in a 4 o'clock
position to the horizontal suction line outside the cabinet after
the piping connections have been made.
On KBC120 units, fasten the expansion valve bulb on the
suction header Use the clamps provided with the valve to
secure the bulb in position. Bulb must be insulated with arma-
flex or mastic to assure proper operation.
FIGURE 11 - TYPICAL FIELD WIRING DIAGRAM KBU060, KBC090 AND 120
R
B
Y
O
W
X
53
G
60
66
R
B
Y
O
W
X
53
G
60
66
R
Y
G
R
Y
G
V
T
C
O
O
TERMINALS ON
1
ST
STAGE
COOLING
THERMOSTAT
TERMINALS ON
1
ST
STAGE
COOLING
THERMOSTAT
TERMINALS ON SUPPLY AIR
BLOWER MOTOR CONTACTOR 10M
TERMINALS ON SUPPLY AIR
BLOWER MOTOR CONTACTOR 10M
1-PHASE LINE VOLTAGE
POWER SUPPLY
3-PHASE LINE VOLTAGE
POWER SUPPLY
POWER WIRING DISCONNECT
SWITCH AND FUSING TO BE
SUPPLIED BY FIELD
POWER WIRING DISCONNECT
SWITCH AND FUSING TO BE
SUPPLIED BY FIELD
TERMINALS ON
COMPRESSOR
CONTACTOR 1 M
OF CONDENSING UNIT
TERMINALS ON
COMPRESSOR
CONTACTOR 3TB
OF CONDENSING UNIT
1- PHASE
KEU060
3- PHASE
KEU090 and 120
24-VOLT
CONTROL
WIRING
24-VOLT
CONTROL
WIRING
24-VOLT
CONTROL
WIRING
24-VOLT
CONTROL
WIRING
WIRE IN ACCORDANCE WITH LOCAL
AND NATIONAL ELECTRICAL CODES
The field wiring connected to dummy
terminals R and Y on 4TB can be
routed directly from the condensing
unit to the thermostat if desired.
NOTE: USE COPPER
CONDUCTORS ONLY
