STIEBEL ELTRON wpf 20 User Manual

WWW.STIEBEL-ELTRON.COM WPF 20/27/40/52/66 | 9
10.2.2 External installation
We recommend foundations as base for the device.
26�03�01�0803
Route all supply lines inside a conduit that is free from frost
(protective pipe).
Protect the connection area at the back panel against all weather
and solar influences.
10.2.3 Internal installation
The room where the WPF is to be installed must meet the following
conditions:
- Load-bearing floor. For the weight of the WPF. see
"Specification".
- For a quiet heat pump operation on floating screeds. recess
the screed and the anti-vibration insulation around the
installation location
of the heat pump.
4
2
1
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3
1 Concrete ceiling
2 Impact sound insulation
3 Floating screed
4 Recess
- The room must not be subject to a risk of explosions arising
from dust. gases or vapours. Never allow the floor area
and the volume of the installation room to be less than the
minimum values listed in the table.
Typ Volume Floor area
WPF 20 14 m³ 5 m²
WPF 27 | WPF 27 HT 16 m³ 7 m²
WPF 35 23 m³ 9 m²
WPF 40 23 m³ 9 m²
WPF 52 28 m³ 11 m²
WPF 66 33 m³ 13 m²
- When installing the WPF in a boiler room together with
other heating equipment ensure. that the operation of other
heating equipment will not be impaired.
10.2.4 Sound emission.
Never install the heat pump immediately below or adjacent to
bedrooms. Insulate pipes through walls and ceilings against
structure-borne noise transmission.
10.3 Installation of the heat pump system
The layout of the connection material on the soruce side has to
be done according to the evaporator and condensator materials
(Technical Datas) to avoide corrosion.
Design the heat source system for the brine/water heat pump in
accordance with Stiebel Eltron technical guides.
Permitted 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: 161696
10.3.1 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 condensation
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.:
Size the nominal flow rate at brine temperature 0 °C with a
tolerance of + 10 %.
10.3.2 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 obtain the
brine volume inside the heat pump from the "Specification" table.
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.
INSTALLATION
INSTALLATION

STIEBEL ELTRON wpf 20 Specifications

General

Brand	STIEBEL ELTRON
Model	wpf 20
Category	Heat Pump
Language	English