- 15 -
3. Wiring configuration and DIP Switches – AC / Fan coil systems
AO1
AO2
SW1
SW2
HC21-VFS (3S)
(HU only)
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
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
Fan VFS
Humidifier
0V OFF / 10V ON
Fan high
Fan medium
Fan low
11
12
13
14*
15
16
