Preparation; Installation Location; Minimum Clearances; Water Installation - STIEBEL ELTRON DEL 18 Plus Operation And Installation Manual

INSTALLATION
Preparation
Pipe assembly for replacing a gas water heater
You will need this pipe assembly set if the existing installation
has gas water heater connections ( cold water connection on the
left-hand side, DHW connection on the right-hand side).
Pipe assembly for DHB water plug-in couplings
Use the water plug-in couplings if the existing installation contains
water plug-in connections from a DHB water heater.
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.
9. Preparation
9.1 Installation location
Material
losses
Install the appliance in a room free from the risk of frost.
> Always install the appliance vertically and near the draw- off
point. For horizontal installation, see chapter "Alternative in-
stallation methods / Horizontal installation of the appliance".
The appliance is suitable for undersink and oversink installation.
Undersink installation
1 Cold water inlet
2 DHW outlet
Oversink installation
1 Cold water inlet
2 DHW outlet
Note
> Mount the appliance on the wall. The wall must have
sufficient load bearing capacity.
9.2
Minimum clearances
> Maintain the minimum clearances to ensure trouble- free op-
eration of the appliance and facilitate maintenance work.
9.3 Water installation
> Flush the water line thoroughly.
Taps
Use appropriate pressure taps. Open vented taps are not per-
missible.
IlEi
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
O
Material losses
If plastic pipework systems are used, take into account
the maximum inlet temperature and the maximum per-
missible pressure.
Flow rate
> Ensure that the flow rate for switching on the appliance is
achieved.
> Increase the water line pressure if the required flow rate is
not achieved when the draw- off valve is fully open.
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