Si33-105 Outline of Control (Outdoor Unit) < Symbols using in this manual >
Function R407C PLUS Series Heat Recovery System 95
"
3
SH control with outdoor EV
PI control at SHS=10
(initial opening: 200pls)
"
4
Receiver gas relief solenoid valve is opened to feed liquid refrigerant to liquid line for 60
seconds after entering pump down residual operation.
However, the valve closes when Th7-Te<0.
Note that if a thermostat ON signal is received during residual operation, the residual operation
is not conducted and returns to normal operation when the total time of previous operation,
residual operation and current operation is 10 minutes or longer.
Remarks
!
Residual operation is not conducted if stop signal received during defrosting and cooling oil
return operation.
!
Forcible thermostat OFF is conducted if defrosting or oil return signal is received during
residual operation.
!
Normal soft start is conducted if thermostat ON is received during residual operation.
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