Friedrich SS15N30* ユーザーズマニュアル

23

Cooling

De-Energized

Energized

On

On

Off

Off

Heat - Heat Pump

Heat - Electric

Fan Only

* The Reversing valve stays in the last state until a call for heat or cooling (see figure below)

Once the ambient temperature rises past the cool demand threshold (Cool Set Point + 1.5 ˚F) (see figure below), and 

the compressor is not locked out, the cooling cycle begins. As shown in the figure below, the fan is started 5 seconds 

prior to the compressor. Once the ambient temperature has been lowered to the cool set point (Cool Set Point minus 

.25 ˚F), the cooling cycle starts to terminate by shutting off the compressor. After a 30 seconds delay, the fan is shut 

off. (See figure below for graphic details)

The reversing valve only changes when required 

to provide cooling or heat pump. The RV valve 

stays in it's last state until required to change.

Active Mode

Compressor

Reversing Valve State