6 MR4PMUHV Electronic Temperature/Defrost Control with Relay Pack Product/Technical Bulletin
Note: All circuits must have a common disconnect and be connected to the same pole of the disconnect.
Defrost
Heater
or
Solenoid
Valve
Coil
Evaporator Fan
L1
L2
This wiring connection is used
only with reversible evaporator fan
motor applications.
240
120
FNO FNC
Cp1 Cp2
Dh1 Dh2
Internal to Relay Board Assembly
Compressor
ALM
Alarm
Figure 11: Typical 240 VAC Relay Pack Wiring Connections
Note: All circuits must have a common disconnect and be connected to the same pole of the disconnect.
ALM
Alarm
Defrost
Heater
or
Solenoid
Valve
Coil
Evaporator Fan
Neutral
120
240 120
FNO
L2
FNC CP1
CP2
DH1
DH2
Internal to Relay Board Assembly
Compressor
This wiring connection is used
only with reversible evaporator fan
motors applications.
Figure 12: Typical 120 VAC Relay Pack Wiring Connections
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