6 Electrical installation
18
Installation and maintenance instructions geoTHERM 0020250180_00
–
Brine circuit operating pressure: 0.15 MPa
(1.50 bar)
3.
Build up the pressure in the brine circuit by using the
filling pump to top up the brine fluid by opening the isol-
ation valve
(61)
.
4.
Open the isolation valve
(62)
to allow any excess pres-
sure to escape if it is above the required filling pressure
of 0.15 MPa (1.5 bar) and below the expansion relief
valve's operating pressure of 0.3 MPa (3 bar).
5.
Check the brine circuit's filling pressure in the heat
pump's DIA system.
6.
If required, repeat the process.
7.
Remove the two hoses from the valves
(61)
and
(62)
.
8.
Purge the system once more after starting up the heat
pump.
9.
Pass the vessel with the remaining brine fluid on to the
end user to be stored.
6
Electrical installation
6.1
Carrying out the electrical installation
1.
Observe the relevant information about electrical install-
ation in the appendix and in the system instructions.
Danger!
Risk of electric shock!
Touching live connections may cause serious
personal injury.
▶
Before carrying out electrical installation
work, always pull the product's mains plug
out of the earthed plug socket.
▶
Secure the power supply against being
switched back on.
Danger!
Risk of death from electric shock as a res-
ult of an improper electrical connection!
An improper electrical connection may neg-
atively affect the operational safety of the
product and result in material damage or per-
sonal injury.
▶
The electrical installation must be carried
out by a suitably qualified competent per-
son who is responsible for complying with
the existing standards and directives.
Caution.
Material damage caused by short circuit.
A maximum of 10 mm of the insulation may
be removed from the ends of lines that carry
mains voltage (230 V) for the connection
to the 230 V terminal. If more insulation is
removed, there is a risk of short circuits on
the PCB if the cable has not been correctly
secured to the 230 V terminal.
▶
Strip the cable ends to a maximum of
10 mm.
▶
Take care to wire up correctly.
2.
When electrically connecting the product, observe the
technical connection conditions for connecting to the
power supply network operator's low-voltage network.
3.
Route low-voltage wires, such as sensor lines, on-site
in the building so that there is sufficient clearance to
230 V lines. Minimum clearance for the low-voltage
wire and power supply cable at a line length of > 10 m:
25 cm.
4.
To establish the power supply, plug the heat pump's
mains plug into a suitable earthed plug socket. You
must observe the notes (
→
Page 23)on this.
–
Make sure that the earthed plug socket for the heat
pump is individually fused. The earthed plug socket
must be freely accessible at all times following in-
stallation.
Note
If one of the product's power supply cables is
damaged, you must replace it with a special
connection cable that is available from the
manufacturer or customer service.
5.
Observe the maximum line length of the sensor lines.
–
Max. length of the sensor line: 50 m (164 ft
‒
1 in)
6.2
Routing eBUS lines
1.
Route the eBUS lines in a star formation from a junction
box to the individual products.
2.
If several conductors are connected, use connection
terminals.
3.
Ensure that you do not route the eBUS lines parallel to
the power supply cables.
–
Piping diameter:
≥
0.75 mm
²
6.3
Opening the electronics box
2.
1.
1
2
3
1.
Hinge the electronics box
(1)
forwards.
2.
Undo the four clips on the rear cover
(2)
of the electron-
ics box from the brackets
(3)
on the electronics box at
the rear and at the sides.
