22
of 53
Low voltage
This shows the connections to the low voltage connector on the control board:
Pin No.
Row Z
Row B
Row D
2
Interconnection-
Warning relay NC
Fault relay NC
4
Intercon
Warning relay common
Fault relay common
6
Damper supply 0 VDC
Damper control
Damper supply 24 VDC
8
40 VAC neutral
Current sensor compressor
Current sensor heater
10
40 VAC phase
Current sensor compressor
Current sensor heater
12
GND
Alarm relay NC
Alarm relay common
14
0 VDC internal DC fan
PWM output internal DC fan
24/ 48 VDC internal DC
fan
16
Hot spot sensor
Return sensor
Condenser sensor
18
Hot spot sensor
Return sensor
Condenser sensor
20
O VDC supply
Rotation input internal DC
fan
24/ 48 VDC supply
22
Alarm/ occupied com-
mon
Not used
Filter alarm
24
Humidity alarm input
Occupied input
Smoke alarm input
26
Not used
Not used
Not used
28
RS485 B
Supply sensor
Ambient sensor
30
RS485 A
Supply sensor
Ambient sensor
32
Not used
Not used
Not used
Summary of Contents for DCU22-2000DH
Page 51: ...51 of 53 12 Appendix Dimension...
Page 52: ...52 of 53 Wiring diagram...
