Auxiliary Heater Connection; Setting For Auxiliary Heater - York IDH072B21S Series Installation And Maintenance Manual

5.7.2 Auxiliary Heater Connection

When the auxiliary heater shall be used, wire the circuit as shown below.
Example of Electrical Wiring
Power Supply
for Relay (DC24V)
When PSC-5RA (optional part, required) is used for connection between the auxiliary heater and indoor unit
DO NOT connect connector (CN7) to indoor unit PCB. Otherwise, fire may result. Use connector cable
(optional part, required)) between the connector (CN7) of PSC-5RA and indoor unit PCB connector (CN1925).
Connector (CN3) can be used for input integration functionality. Use another PSC-5RA for output integration
functionality.

5.7.3 Setting for Auxiliary Heater

Auxiliary heater setting is disabled by default.
Refer to "Function Selection by Wired Controller" section for details.
P01432Q-rev.1
Relay and 3 Pin Connector Kit
(PSC-5RA)
TB2
7
X1
X
1
8
X
9
X2
2
Unit Side (Responsible)
Field Installation Side (Out of Responsibility)
Automatic
Cutout
Xa
Power Supply for
Auxiliary Heater
Connector Cable Indoor Unit
(PCC-CN1925-H)
CN7 1 1
2 2
1 1
3 3
CN1925
2 2
4 4
3 3
PCB1:
Pins 3 and 4 of CN1925
Thermal Electric
Xa
Fuse Heater
(1 fuse in case of single power supply and
2 fuses for three phase power supply)
PCB1
Wired Controller
15