Preparations; Installation Site - STIEBEL ELTRON DEL 27 SL electronic LCD Bedienung Und Installation

INSTALLATION

Preparations

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, such as electric storage heaters, are simultane-
ously being operated.
ZTA 3/4 - central thermostatic valve
The thermostatic valve is for central premixing, for example on an
instantaneous water heater with solar thermal system.
Service monitor
Diagnostic unit for detecting faults in the appliance.
9. Preparations
f Flush the water line thoroughly. f
Taps/valves
f Use suitable taps (see chapter "Appliance description / Acces- f
sories"). Open vented taps are not permissible.
A safety valve is not required.
Note
Never use the cross-piece to reduce the flow rate. The
cross-piece should only be used to shut off the appliance.
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 losses
!
If plastic pipework systems are used, take into account the
maximum inlet temperature and the maximum permis-
sible pressure (see chapter "Specification / Data table").
Flow rate
f Ensure that the flow rate (see chapter "Specification / Data f
table", On) is sufficient for switching on the appliance.
f Increase the mains water pressure if the required flow rate is f
not sufficient with an open draw-off valve.
Flexible water connection lines
f If the appliance is installed with flexible water connection f
lines, ensure that the pipe bends do not become twisted.
Pipe bends have a bayonet fitting and are installed inside the
appliance.
f Secure the back panel with an additional screw at the f
bottom.
28 | DEL SL electronic LCD
Appliance with adjustable connected load
The appliance DEL 18/21/24 SL electronic LCD is factory set to
21 kW. For other outputs, proceed as follows:
f Plug in the coding card according to the selected output; for f
selectable output and fuse protection of the appliance, see
"Specification".
f Tick the selected output on the type plate. Please use a ball- f
point pen to do this.
9.1

Installation site

Material losses
!
Only install the appliance in rooms free from the risk of
frost.
f Always install the appliance vertically and near the draw-off f
point.
The appliance is suitable for undersink and oversink installations.
Note
Mount the appliance on a sufficiently load-bearing wall.
Undersink installation
1 Cold water inlet
2 DHW outlet
Oversink installation
2
1 Cold water inlet
2 DHW outlet
1
2
1
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