Operating Instructions and Installation Instructions
ENGLISH
Pipe set, offset installation
This pipe set with pipe bends is required if you want to have the
appliance vertically offset against the water connection by approx.
90 mm downwards.
Pipe set for replacing a gas water heater
This pipe set is required if the installation has existing gas water
heater connections (cold water connection on the left and DHW
connection on the right).
DHB replacement pipe set
2 water couplings. These 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 for installation in the electric distribution
board enables priority control of the instantaneous water heater
when electric storage heaters are being operated simultaneously,
for example.
ZTA 3/4 – Central thermostatic valve
Thermostatic valve for centralised premixing, e.g. an instantaneous
water heater in conjunction with a solar thermal system.
9. Installation
9.1 Installation information
9.1.1 Flow pressure
If the 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.
Note
For the thermostatic valve to function correctly, the flow
limiter for this valve must not be replaced with the plastic
profile washer.
2
1
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1 Flow limiter
2 Plastic profile washer
9.1.2 Flexible water connection lines
If the appliance is connected with flexible water connection lines,
ensure that the bayonet fittings of the pipe bends do not become
twisted inside the appliance.
9.1.3 Appliance with changeover connected load
The appliance DHB-E 18/21/24 SLi is set to 21kW when delivered.
If the appliance is installed with a different output, take the
following steps:
Re-plug the coding card according to the selected output; for
selectable output and fuse protection of the appliance see
"Specification“.
Mark the selected output on the type plate using a
permanent marker.
Install the flow limiter with a rating corresponding to that of
the appliance. The colour of the flow limiter is given in the
table "Specification".
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10. Installation
10.1 Installation location
The appliance is exclusively designed for installation on a solid
wall. Ensure that the wall has a sufficient load-bearing capacity.
Always install the appliance vertically (over or undersink) in a
room free from the risk of frost.
10.1.1 Undersink
1
2
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1 Cold water inlet
2 DHW outlet