York CIDH018B21S, Service Manual

Page: 146 / 186

5-16
SM-18001-rev.1
EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING
(7) Picking Up Total Heat Exchanger Signal [ Output Setting: Code (07) ]
This function is utilized to pick up a total heat exchanger signal during the ventilation mode selected
with a wired controller. An example of basic wiring is shown below.
Picking Up Total Heat Exchanger Signal
(Example: Cooling Thermo-ON Output is set to terminals 1 and 3 of CN7.)
CN7 Connector
CN7
1
3 P Connector
Indoor Unit PCB
3
Auxiliary Relay
RYa
RY
NOTE:
These are examples using general-purpose relay.
(6) Picking Up Heating Thermo-ON Signal [ Output Setting: Code (06) ]
This function is utilized to pick up a thermo-ON signal during the heating operation. An example of
basic wiring is shown below. The contact of the auxiliary relay “RYa” is closed during thermo-ON in
heating operation. Use this function for operation of a circulator or a humidifier.
Picking Up Operation Signal
(Example: Heating Thermo-ON Output is set to terminals 1 and 2 of CN8 1 .)
RY
CN8 1 Connector
CN8
1 2
3 P Connector
Indoor Unit PCB
Auxiliary Relay
RYa
NOTE:
1. Output terminal (CN8) is no longer available for Ducted Medium Static type and Ducted Slim type indoor
units produced in April 2018 or later.