Sanden GS3-45HPA-US, Installation Manual

Page: 13 / 36

Sanden Heat Pump – Installation Manual
Page 13 of 36
Figure 8: Connecting tank unit thermistor cable – GAUS Tanks shown as example
System operation using continuous Power Supply

If the block out time function is selected (setting is covered on Page 18) the unit will
not operate during the block out times – this function is typically used on
installations that have time of use electricity tariffs.

The water heating cycle operation starts automatically when the residual hot water
in the tank unit is less than 40 gallons (150 litres).

The system will not run if the electrical power supply is cut off. However, the system
will automatically start operation, once the electric power supply is restored.
System operation if connected to Demand Response Power

There are no special settings for the Demand Response. The system will run once
power becomes available and the temperature in the tank drops below the set point
of the tank thermistor.

If connecting the unit to Demand Response power ensure that the power supply
provides a minimum of 5 hours continuous power, as it can take at least four hours
to fill the tank unit with hot water.
If the ambient temperature is lower than 50
o
F (10
o
C) this can be longer.