Installation, Operation and Maintenance 3 - 9
Figure 22
Motor Terminal Junction Box Wiring (Wye Delta Starter)
Module Connections for Interconnecting
Wiring
All connectors can be unplugged or the wires can be
removed from the screw assembly. If an entire plug is
removed, make sure the plug and the associated
jack are marked for proper location identification
during reinstallation.
CAUTION
CAUTION: Plugs and jacks must be
clearly marked before disconnecting,
because specific plugs will fit into
other jacks. Possible damage to
equipment may occur if the plugs are
reversed with the jacks.
Interconnecting Wiring (Field Wiring
Required)
Important
: Do not turn chiller on or off using the
chilled water pump interlocks.
When making field connections, refer to the
appropriate field layout, wiring, schematics and
controls diagrams that ship with the unit. The
diagrams in this manual are typical only and may not
match the unit.
Whenever a contact closure (binary output) is
referenced, the electrical rating is:
Whenever a dry contact input (binary input) is
referenced, the electrical rating is 24VDC, 12 mA.
Whenever a control voltage contact input (binary
input) is referenced, the electrical rating is 120 VAC,
5mA.
NOTE: Asterisked connections require the user to
provide an external source of power. The 115V
control power transformer is not sized for additional
load.
Chilled Water Pump Control*
The chiller module (1U1) provides a contact closure
output (J12-1, J12-2) to control the chilled water
pump starter. This contact closure pulls in when the
L3
L2
L1
L3
L2
L1
Ground Lugs
Current Transformers
L3
L2
L1
1K1
1K2
1K3
1K4
T1
T2
T3
T4
T5
T6
1T1
1T2
1T3
1
2
3
4
5
6
At 120 VAC
7.2 amp resistive
2.88 amp pilot duty
1/3 hp, 7.2 FLA, 43.2 LRA
At 240 VAC
5.0 amp resistive
2.0 amp pilot duty
1/3 hp, 3.6 FLA, 21.6 LRA
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