HaiLin Controls
Beijing HaiLin Auto Controls Equipment Co., Ltd. Page 2 of 2 Tel: +86 10 8070 2235
Shahe Industrial Zone, Changping District www.hilin.com
temperature and set-point exceed 1
, FCU Valve will be open; If room temperature and set-point are equal,
HL109DA/DA2 will close the FCU valve with the fan still running; HL109DB/DB2 will close the FCU valve and Fan both.
Control FCU valve under 4-pipe configuration (HL109FCV2): In cooling, when the room-temperature is higher than
set-point, the cooling valve will be opened. Otherwise it will be closed. Heating valve is always closed. In heating, When
the room temperature is lower than set-point, the heating valve will be opened. Otherwise it will be closed. Cooling valve is
always closed.
WIRING DIAGRAMS
MOUNTING
Note: Be sure to connect all the wires as per the wiring diagrams and keep it away from water,
mud and other material so as to prevent the unit being spoiled!
1. Open Thermostats
2. Install Back Base
3. Wire Connection
4. Close Front Case
HL109DA/DB
L
N
Val
Hi
Med
Low
Fan
Valve
AC 220V 50/60Hz
N L
HL109DA2/DB2
L
N
VO
Hi
Med
Low
Fan
Valve
VC
AC 220V 50/60Hz
N L
HL109FCV2
L
Cooling
N
Hi
Med
Low
Fan
Val1
Val2
Heating
AC 220V 50/60Hz
N L
