STIEBEL ELTRON WPF 10 M, Руководство по эксплуатации и установке

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INSTALLATION
PREPARING FOR INSTALLATION
10.3 Removing the casing panels
When removing the front cover ensure that the cables that con-
nect the heat pump manager to the control panel are not torn off.
The same applies to the earth connection which connects the front
cover to the casing electrically.
2x
4x
26
�0
3�
01
�1
57
4
10.4 Installing the heat source system
Design the heat source system for the ground source heat pump
in accordance with the technical guides.
Approved brine:
- Heat transfer medium as concentrate on an ethylene glycol
base, part no: 231109
- Heat transfer medium as concentrate on an ethylene glycol
base, part no: 16 16 96
10.4.1 Circulation pump and required flow rate
Use a circulation pump with compound-filled windings to supply
the brine, to prevent an earth short circuit through condensate in
the electrical part of the pump (cold water version).
Size the circulation pump in accordance with the system-specific
conditions, i.e. nominal flow rate and pressure drop must be taken
into consideration (see “Specification”).
An adequate flow rate must be safeguarded at every possible
brine temperature, i.e.:
Nominal flow rate at a brine temperature of 0 °C with a tolerance
of +10 %.
10.4.2 Connection and filling with brine
Prior to connecting the heat pump, check the heat source circuit
for possible leaks, and flush thoroughly.
Calculate the volume of the heat source circuit. You can determine
the brine volume inside the heat pump under specific operating
conditions from the following table (see “Specification”).
The overall volume equals that of the required amount of brine
that should be mixed from undiluted ethylene glycol and water.
The chloride content of the water must not exceed 300 ppm.
Mixing ratio
The brine concentration varies when using a geothermal collector
or a geothermal probe as a heat source.
The mixing ratio can be found in the table below.
Ethylene glycol Water
Geothermal probe 25 % 75 %
Geothermal collector 33 % 67 %
Filling the brine circuit
Fill the brine circuit via the drain.
1
26
�0
3�
01
�1
60
6
1 Drain, brine side
After filling the system with brine and prior to commissioning,
open the drain until brine runs out of it. No water must remain in
the pipe run to the drain.