ENGLISH-106
Explanation of optional functions
Flow chart of outdoor unit external contact controller
System operation
System stops
Indoor unite remote controller ON
2 way solenoid valve On
Pump On
Yes
No
Flow switch On
f
Flow switch detector circuit must be detected for more than 30 seconds within 3 minutes after first operation signal
output of the pump. (Outdoor unit will not operate when there is no detection.)
f
Outdoor unit will stop if the contact of flow switch becomes ‘Off’ even during the operation.
f
When outdoor unit stops, cooling water pump will also stop.
f
Even when you are not using the external contact control from DVM outdoor unit, you may use other external control
methods such as DDC, PLC or BMS and apply above flow chart. Also apply control for freezing prevention of the water
circulation during winter season.
f
If you control pump/2 way solenoid valve with extra controller, make sure to apply in control so that pump/2 way
solenoid valve operates for 3 minutes after the outdoor unit stops operating.
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