STIEBEL ELTRON WPE-I 04 H 230 Premium - DHW Heating; Fitting the Push-Fit Connectors; Operation with Buffer Cylinder; Venting the Heating System

INSTALLATION
Installation
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9.8 Venting the heating system
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1 Automatic air vent valve
 Vent the pipework by pulling up the red cap on the air vent
valve.
 Close the air vent valve after the venting process.
9.9 DHW heating
For DHW heating, a DHW cylinder with an internal indirect coil is
required. The minimum coil surface area required is 3m².
An integral 3-way valve is integrated in the appliance for switching
between the DHW heating circuit and the central heating circuit.
 Thoroughly flush the pipework before connecting the heat
pump. Foreign bodies, such as rust, sand and sealant, can
impair the operational reliability of the heat pump. We rec-
ommend installing our filter assembly in the DHW heating
circuit (see chapter "Appliance description/ Accessories").
 Connect the DHW flow of the appliance to the upper heat
exchanger coil connection of the DHW cylinder (see "Specifi-
cation/ Dimensions and connections").
 Connect the DHW return of the appliance to the lower heat
exchanger coil connection of the DHW cylinder (see "Specifi-
cation/ Dimensions and connections").
Note
If no DHW heating is being connected, connections e22
(cylinder flow) and e23 (cylinder return) are to be hydrau-
lically interconnected.
9.10 Operation with buffer cylinder
 Install the supplied TAFPT immersion/contact sensor.
 Connect the sensor to the heat pump manager.
 Set the parameter on the heat pump manager.
Parameter Setting
BUFFER OPERATION (SETTINGS/ HEATING/ STANDARD
SETTINGS)
ON
9.11 Fitting the push-fit connectors
Note
The plastic push-fit connectors are not suitable for instal-
lation in the DHW line.
 Only install the push-fit connectors in the heating or
brine circuits.
!
Material losses
 Tighten the screw cap of the push-fit connector by
hand. Never use a tool.
Material losses
To ensure the push-fit connector is held securely, pipes
with a surface hardness >225HV (e.g. stainless steel)
must have a groove.
 Using a pipe cutter, cut a groove (depth ap-
prox.0.1mm) at a defined distance from the end of
the pipe.
- Pipe diameter 22mm: 17±0.5mm
- Pipe diameter 28mm: 21±0.5mm
!
Material losses
Support sleeves are required when using plastic pipes.
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 Remove the protective grey caps from the push-fit connec-
tors.
How the push-fit connectors work
The push-fit connectors are equipped with a retainer with stain-
less steel serrations and an O-ring for sealing. In addition, the
push-fit connectors are equipped with the "twist and lock" func-
tion. Simply turning the screw cap by hand will secure the pipe
in the connector and push the O-ring against the pipe to seal it.