20 | DHF C www.stiebel-eltron.com
INSTALLATION
Preparation
Installation set, surface-mounted
- Solder fitting – copper pipe for a Ø12mm solder connection
- Press fitting – copper pipe
Load shedding relay (LR 1-A)
The load shedding relay for installation in the distribution board
provides priority control for the instantaneous water heater when
other appliances, suchas electric storage heaters, are being op-
erated simultaneously.
9. Preparation
9.1 Installation site
!
Material losses
Install the appliance in a room free from the risk of frost.
f Always install the appliance vertically and near the draw-off
point.
The appliance is suitable for undersink and oversink installation.
Undersink installation
D0000042705
1
2
1 Cold water inlet
2 DHW outlet
Oversink installation
D0000042706
12
1 Cold water inlet
2 DHW outlet
Note
f Mount the appliance on the wall. The wall must have
sufficient load bearing capacity.
9.2 Minimum clearances
≥50≥50
≥90
≥90
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f Maintain the minimum clearances to ensure trouble-free op-
eration of the appliance and facilitate maintenance work.
9.3 Water installation
Never operate with preheated water.
f Flush the water line thoroughly.
Flow rate
f Ensure that the flow rate required to switch on the appliance
is achieved (see chapter "Installation/ Specification/ Data
table/ ON"). If the required flow rate is not achieved when
the draw-off valve is fully opened, increase the water line
pressure.
Taps
Use appropriate pressure taps. Open vented taps are not per-
missible.
Thermostatic pressure valves must be suitable for hydraulically
controlled instantaneous water heaters.
Note
Never use the 3-way ball shut-off valve in the cold water
inlet to reduce the flow rate. The 3-way ball shut-off valve
is intended only to shut off the cold waterinlet.
Permissible water line materials
- Cold water supply line:
Pipes made from galvanised steel, stainless steel, copper or
plastic
!
Material losses
If you use plastic pipework in the cold water supply line,
you must observe the following condition:
f Install a metal pipe approx. 1m in length at the ap-
pliance cold water connection. Then you can install
the plastic pipework.
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