STIEBEL ELTRON HDB-E Si 01.11.2012 - 31.01.2013 - Manual (Page 19)

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www.stiebel-eltron.com HDB-E Si | 19
INSTALLATION
Safety
INSTALLATION
7. Safety
Only a qualified contractor should carry out installation, commis-
sioning, maintenance and repair of the appliance.
7.1 General safety instructions
We guarantee trouble-free operation and operational reliability
only if the original accessories and spare parts intended for the
appliance are used.
!
Material damage
Observe the maximum inlet temperature. The appliance
can be damaged by higher temperatures.
7.2 Regulations, standards and instructions
Note
Observe all applicable national and local instructions and
regulations, e.g. DIN 1988 / DIN EN 806 in Germany.
- The protection rating IP 25 (hoseproof) can only be ensured
with a correctly fitted cable grommet.
- The specific electrical resistance of the water must not fall
below that stated on the type plate. In a linked water net-
work, observe the lowest electrical water resistance (see
chapter “Specification / Application areas”). Your water
supply utility will advise you of the specific electrical water
resistance or conductivity.
8. Appliance description
8.1 Standard delivery
- Mounting bracket
- Twin nipple
- Flat gaskets
- Strainer
- Flow limiter
- Plastic profile washer
8.2 Accessories
Universal mounting frame
Mounting frame with electrical connections.
Pipe assembly DHB water plug-in couplings
2 water plug-in couplings allow the appliance to be connected to
the available water plug-in connections of a DHB.
Load shedding relay (LR 1-A)
The load shedding relay which needs to be installed in the dis-
tribution board provides priority control for the instantaneous
water heater when operating, for example, electric storage heat-
ers simultaneously.
9. Preparations
 f Flush the water line thoroughly.
Taps/valves
 f Use appropriate pressure-tested taps. Open taps are not
permitted.
A safety valve is not required.
Permissible water pipe materials
- Cold water inlet pipe:
Galvanised steel pipe, stainless steel pipe, copper pipe or
plastic pipe
- DHW outlet pipe:
Stainless steel pipe, copper pipe or plastic pipe
!
Material damage
If plastic pipework systems are used, take into account
the maximum inlet temperature and the maximum pres-
sure (see chapter “Specification / Data table”).
Flow rate
 f Ensure that the flow rate (see chapter “Specification / Data
table”, On) for switching on the appliance is achieved.
 f Increase the mains water pressure if the required flow rate is
not achieved with the draw-off valve fully opened.
Flow pressure
If the minimum flow rate required for the appliance to switch on is
not achieved even with the tap fully open, remove the flow limiter.
Replace it with the plastic profile washer supplied. If required the
pressure in the water installation can also be raised.
2
6
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2_0
2_
1
3
6
3
2
1
1 Flow limiter
2 Plastic profile washer
Note
Always use a flow limiter when operating the appliance
with a thermostatic valve.