STIEBEL ELTRON WPL-A 05 HK 230 Premium - Fitting the Push-Fit Connectors; Flow and Return Connection

INSTALLATION
Installation
www.stiebel-eltron.com WPL-A Premium | 15
f When sizing the heating circuit, observe the internal pressure
differential (see chapter "Specification/ Data table").
10.3 Flow and return connection
Material losses
In cooling mode, condensate can form when the dew
point temperature is undershot.
f Take suitable measures to prevent the formation of
condensate.
26_03_01_1871
2
1
3
4
1 Heating flow
2 Heating return
3 Drain
4 Ventilation
f Connect the heat pump to the heating circuit. Check for tight-
ness.
10.4 Fitting the push-fit connectors
Note
The plastic push-fit connectors are not suitable for instal-
lation in the DHW line or the solar circuit.
f Install the push-fit connectors only in the heating
circuit.
!
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.
f 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
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. The push-fit con-
nectors also have a "twist and secure" function. 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.
Making the push-fit connection
The connector must be in its relaxed position before the pipe is
inserted. In this position, there is a small gap between the screw
cap and main body.
D0000088519
1
2
3
4
1 Retainer
2 Screw cap
3 Gap between screw cap and main body
4 Main body
D0000088520
Pipe Ø 28mm
Depth of insertion A max. 44mm
!
Material losses
Pipe ends must be deburred.
f Always use a pipe cutter to trim pipes.
f Push the pipe past the O-ring into the push-fit connector
until it reaches the prescribed insertion depth.
f Tighten the screw cap by hand against main body as far as it
will go. This secures the push-fit connection.
Undoing the push-fit connection
If the push-fit connectors later need to be undone, proceed as
follows:
f Turn the screw cap anti-clockwise until there is a narrow gap
of approx. 2mm. Press the retainer back with your fingers
and hold on to it.
f Pull out the inserted pipe.
D0000088521