Therma-Stor Products Group 300 Benutzerhandbuch

8

Figure 3: Electrical schematic of Phoenix 300

The contacts of the single pole, single throw relay 
complete the power circuit to the compressor. The 
contacts are closed when power is provided to the relay 
coil via the control circuit. The control circuit includes the 
power switch, low pressure control, time delay (HP model), 
defrost thermostat and timer.

 

The HP model has a time delay relay in the compressor 
control circuit. This relay delays the compressor start 
about 2 minutes after the power switch is turned on. 
This reduces the unit’s starting amp draw by starting the 
blower and compressor at different times. This reduces 
the chance of tripping a circuit breaker during hard start 
situations, such as when the unit has been stored in a 
cold place. It also reduces compressor short cycling after 
the compressor has stopped.