Gebwell G-Power® substation installation manual
8
Pump valve
The pump valve is a shut-off and non-return valve in connection with the domestic hot water circulation
pump. The valve also acts as a shut-off valve when servicing the circulation pump.
The non-return valve prevents water from being misdirected during consumption.
Controllers and pumps
Separate instructions for the controller and the circulation pumps are included in the substation delivery.
Accessories
Differential pressure controller
The differential pressure controller ensures a constant pressure difference for the heating and domestic hot
water control valves. It is factory adjusted to a setting of 120 kPa, which is six revolutions downwards from
the topmost position of the regulating wheel. One revolution (360°) of the regulating wheel corresponds to
a 10 kPa change in the pressure difference setting. If a higher-pressure difference is desired, rotate the
regulating wheel clockwise, and correspondingly, rotate the regulating wheel anticlockwise for a lower
pressure difference.
District heating accessory kit
The district heating accessory kit is integrated into the substation. The kit includes pressure gauges and
shut-off valves.
The district heating input and return pressures can be seen on the pressure gauges. During usage, the
pressure gauge shut-off valves must be kept closed; open the valves only when you want to check the
district heating input or return pressure.
