Gebwell G-Power® substation installation manual
10
Electrification
Ensure that all the electrical parts are in faultless condition and are firmly fixed to the substation and
piping. Once the pipework is finished and the water has been connected, an electrician is not necessarily
needed for the start-up of the G-Power Easy single-family house substation.
If you are uncertain, ask an electrician to perform the following operations:
•
Install the outdoor temperature sensor to the north wall of the building at a height of approximately 3
m. The sensor measures the current outside temperature (do not install the sensor near ventilation
windows).
•
The outdoor temperature sensor includes a wire and a plug. Connect the outdoor temperature sensor
plug to the connector in the control box that is marked with the decal “outdoor temperature sensor
wire”. Alternatively, the outdoor temperature sensor can already be connected directly to the
controller.
•
Check that all the pipes are filled with water and that the air has been bled out of them.
•
Connect the power supply plug of the controller power supply unit and circulation pump P2 to a
grounded wall socket with 10A/230V fuses.
•
Wait from approx. 10s, turn on the circulation pumps P1 (domestic hot water) and P2 (heating) on the
operating switch.
•
Switch on the controller. See “User instructions for controllers”.
For underfloor heating, connect a pre-wired pump stop thermostat (TS2 / TS3) to the heating supply pipe.
The electrical connection is ready. Attach the sensor on the heating supply pipe as far as possible from the
heat exchanger. The minimum distance is 1 m. Set the temperature to, for example, 55°C.
5.
Things to note
Differential pressure in the district heating circuit
The differential pressure generated by the district heating circuit pumps enables the circulation of district
heating water in the district heating circuit and in each customer’s district heating equipment. The district
heating circuit pressure and differential pressure can vary. For example, the pressure and differential
pressure values are usually higher in the winter than in the summer.
Customer’s district heating equipment is usually designed for a differential pressure of 60 kPa (0.6 bar).
If the differential pressure in the district heating circuit is high (> 2 bar), we recommend that a differential
pressure controller is used.
Sound engineering practice
According to the Finnish Pressure Equipment Act 1144/2016, pressure equipment that is not subject to the
essential safety requirements referred to in section 14 of the Act due to its characteristics shall be designed
and manufactured in accordance with the sound engineering practice of a Member State in the European
Union.
Pressure equipment designed or manufactured in accordance with the sound engineering practice shall not
bear the CE mark referred to in section 17 of the Act.
G-Power substation is designed and manufactured in accordance with the sound engineering practice.
