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3. Wiring configuration and DIP Switches – AC systems
AO1
AO2
HC21-3S
(HU only)
Fan medium
Fan high
Fan low
Heat element 2
Compressor 1
Heat element 1
(see SW1.4 HC)
SW1
SW2
8
7
6
5
4
3
2
1
6
5
4
3
2
1
SW1.8 =Protocol: ON – BACnet, OFF – MODBUS
SW1.4 = HP: ON – Heat pump active in cool, OFF – Heat pump active in heat
HC: ON – Electrical heater, OFF – Oil/Gas heater (no fan)
SW1.5 = ON: Disable compressor delay, OFF – Enable compressor delay
SW2.1 = With/Without dehumidifier: ON – With, Off – Without
SW2.2 = Enable cool only mode: ON – Cool only, OFF – Cool and Heat
*SW2.3 = Enable lights button and use terminal 14 for lights output
SW2.4 - SW2.6 – Not in use
HP
- Heat pump system
HC
- Non heat pump system
##
- Heating/Cooling stages
X
Humidifier
0V OFF / 10V ON
HC21-3S
(HU + DeHU)
Fan medium
Fan high
Fan low
Heat element 2
Compressor 1
Heat element 1
(see SW1.4 HC)
8
7
6
5
4
3
2
1
6
5
4
3
2
1
Dehumidifier
0V OFF / 10V ON
Humidifier
0V OFF / 10V ON
HP22-VFS (3S)
(HU only)
Compressor 2
Compressor 1
Heat pump
(see SW1.4 HP)
Fan VFS
Humidifier
0V OFF / 10V ON
8
7
6
5
4
3
2
1
6
5
4
3
2
1
HP21-VFS (3S)
(HU only)
Heat element
(2
nd
stage heat)
Compressor
Heat pump
(see SW1.4 HP)
8
7
6
5
4
3
2
1
6
5
4
3
2
1
Fan VFS
Humidifier
0V OFF / 10V ON
Fan medium
Fan high
Fan low
Fan medium
Fan high
Fan low
11
12
13
14*
15
16
