Carrier 39HXC Installation, Operation And Maintenance Instructions page 26

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5 - INSTALLATION AND INSTALLATION CONNECTIONS
Additional box terminal block references
Electric heaters
Pre-heats 1 stage: 4 wires
Machine terminal block
Xm 22 _ b-3
Xm 22 _ b-4
Xm 22 _ b-7
Xm 22 _ b-8
Remote temperature sensor not connected if there is a pre-heating coil
26
Additional box terminal block
Xm 7 _ b-1
Xm 7 _ b-2
Xm 7 _ b-4
Xm 7 _ b-5
Hydraulic coil valve control
Remote temperature sensor
Electric heater safety monitoring
Electric heater stage 2 control
Electric heater stage 1 control
Notes
On/off control
24 VAC
Electric heater safety thermostat return
Dry contact
Inlet/Outlet
Digital outputs
Digital inputs

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