STIEBEL ELTRON WPL 10 A User Manual

www.stiebel-eltron.com WPL 10 | 9
INSTALLATION
Installation
10.4 Oxygen diffusion
!
Material losses
Avoid using open vented heating systems or steel pipe-
work in conjunction with underfloor heating systems with
plastic pipes that are permeable to oxygen.
In open vented heating systems or in underfloor heating systems
with permeable plastic pipes, oxygen diffusion can cause corro-
sion on steel components such as internal cylinders, steel heating
elements or steel pipes.
The products of corrosion, e.g. rusty sludge, can settle inside the
heat pump condenser and reduce its cross-section, resulting in a
lower output or in the high pressure switch triggering a shutdown.
10.5 Filling the heating system
Heating water quality
Carry out a fill water analysis before the system is filled. This may,
for example, be requested by the relevant water supply utility.
!
Material losses
To avoid damage as a result of scaling, it may be neces-
sary to soften or desalinate the fill water. Always observe
the fill water limits specified in the "Specification / Data
table" chapter.
 Recheck these limits 8 - 12 weeks after commission-
ing and as part of the annual system service.
Note
With a conductivity >1000μS/cm, desalination treatment
is recommended in order to avoid corrosion.
Note
Suitable appliances for water softening and desalinating,
as well as for charging and flushing heating systems, can
be obtained from trade suppliers.
Note
If you treat the fill water with inhibitors or additives, the
same limits as for desalination apply.
10.6 Venting the heating system
Vent the heating system thoroughly.
10.7 Safety temperature controller for underfloor
heating system
!
Material losses
In order to prevent excessively high flow temperatures in
the underfloor heating system in the event of a fault, we
always recommend using a safety temperature controller
to limit the system temperature.
10.8 Buffer cylinders
10.8.1 Installation with buffer cylinder
A buffer cylinder is recommended to ensure a trouble-free heat
pump operation. The buffer cylinder (cylinder SBP) is not only
installed as an hydraulic separator for volume flow in the heat
pump and heating circuits, but primarily as energy source for
defrosting the evaporator.
If a buffer cylinder is used, remove the jumper across terminals
X4/5 (pump) and X4/8 (HCP) when commissioning the WPL...IK.
Remove return sensor B2 connected to terminals X2/2(B2) and
X2/3(B2) from the sleeve in the heat pump return and insert it
into the buffer cylinder sensor well.
10.8.2 Installation without buffer cylinder
!
Material losses
For operation without a buffer cylinder, set parameter
BUFFER OPERATION in menu SETTINGS / HEATING /
STANDARD SETTING to OFF.

STIEBEL ELTRON WPL 10 A Specifications

General

Brand	STIEBEL ELTRON
Model	WPL 10 A
Category	Heat Pump
Language	English