Preparation; Installation Location; Minimum Clearances; Water Installation - Stiebel Eltron DEL 18 Plus Utilisation Et Installation

INsTALLATIoN

Preparation

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 being op-
erated simultaneously.
Central thermostatic valve (ZTA 3/4)
Use the thermostatic valve for central premixing when operating
an instantaneous water heater with preheated water, for example.
For use in shower operation, the valve must be set to a maximum
of 55 °C.
9. Preparation
9.1

Installation location

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 f
point.
The appliance is suitable for undersink and oversink installation.
Undersink installation
1 Cold water inlet
2 DHW outlet
Oversink installation
2
1 Cold water inlet
2 DHW outlet
Note
f Mount the appliance on the wall. The wall must have f
sufficient load bearing capacity.
www.stiebel-eltron.com
1
2
1
9.2

Minimum clearances

≥50
f Maintain the minimum clearances to ensure trouble-free op- f
eration of the appliance and facilitate maintenance work.
9.3

Water installation

f Flush the water line thoroughly. f
Taps
Use appropriate pressure taps. Open vented taps are not per-
missible.
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 water inlet.
Permissible water line materials
- Cold water inlet line:
Pipes made from galvanised steel, stainless steel, copper or
plastic
- DHW outlet line:
Pipes made from stainless steel, copper or plastic
Material losses
!
If plastic pipework systems are used, take into account
the maximum inlet temperature and the maximum per-
missible pressure.
Flow rate
f Ensure that the flow rate for switching on the appliance is f
achieved.
f Increase the water line pressure if the required flow rate is f
not achieved when the draw-off valve is fully open.
≥50
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