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1. ON/OFF Toggle switch
• Push up to start the chiller.
• Push down to switch off the chiller for servicing and maintenance.
2. Water Entering Temperature °C (Factory Setting)
• Cooling Mode, setting : 12°C
• Heating Mode, setting : 40°C
3. Antifreeze Protection for Cooling Mode
• Setting : 2°C
4. Temperature Setting
• For cooling mode, press the SW1 button switch once. The green LED will blink for a few seconds. Adjust the small
variable resitor (VR3) to the required water entering temperature of between (10°C - 15°C) by
using a suitable tool.
• For extremely low water temperature (obtained by adding glycol), set the water entering temperature to between 3°C to
9°C by adjusting the DIP switch (SW2).
S1
COMP
L
RL 1
RL 2
SW 2
L
S6
NEUTRAL
VR 2
If the DIP switch is set to (0,0,0), the setting temperature
will be determined by the VR3 setting. Otherwise,
• For heating mode, press the SW1 button switch twice
and then the red LED will blink for a few seconds.
Adjust the variable resistor (VR1) by setting it to the
required water entering temperature which (35°C ~ 50°C)
for heating mode.
• To prevent water from freezing in the system, adjust the
variable resistor VR2. The setting range is between +3°C
to -4°C.
CHILLER CONTROL OPERATION GUIDE
S 2
RL 3
RL 6
RL 5
RL 7
RL 4
RL 8
PCB
VR 1
VR 3
SW 1
S 3
+ 12V
+ 12V
COOL
HEAT
HP
S 4
LP
PUMP O/L
FL
COMP O/L
OV
S5
OUTDOOR DEFROST SENSOR SOCKET. (LENGTH 1.0M)
OUTDOOR AIR TEMP. SENSOR. (LENGTH 0.6M)
LEAVING WATER / ANTIFREEZE SENSOR. (LENGTH 1.0M)
ENTERING WATER SENSOR. (LENGTH 0.6M)
Set
Temperature °C
Set by VR3
3
4
5
6
7
8
9
1 = ON
0 = OFF
1-8
SW2
SW 2-3
SW2-2
SW2-1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
0
1
0
1
0
1
0
1
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