Water Valve Control
SiBE611027_A
15
Function and Control
7. Water Valve Control
Outline
When the optional 2-way valve kit (EKVKHPC) is adopted, the quantity of water is controlled
according to the status of the operation.
Detail
The optional 2-way valve moves behind the command for “open” or “close” (continuity ON/OFF).
During operation, the water valve keeps open except when any of the following protection
controls is activated.
Protection Control for Water Temperature
When the indoor heat exchanger thermistor detects that the water temperature is out of range
for use (under 6°C or over 61°C), the water valve closes for protection.
The water valve reopens after 10 minutes to determine the water temperature again.
Dew Prevention Control for Indoor Unit
During cooling operation, if the thermostat keeps OFF over 480 minutes, the water valve closes.
While the water valve closes due to thermostat OFF, if the thermostat becomes ON, the water
valve reopens.
“Open” command = continuity ON
“Close” command = continuity OFF
Operation
ON
OFF
Water valve
Open
Close
(R12712)
about
90 sec.
about
90 sec.
about
180 sec.
“Open” command
“Close” command
6˚C
6.5˚C
60.5˚C
61˚C
(R12713)
