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Heating system connection
the lwM 250 return must be installed
between the heat source and the
brine pump.
Hydraulic balance
the extract module comprises an
integral flow regulating valve with
display that enables the brine flow
rate through the heat exchanger to
be adjusted easily. the adjustment is
subject to the extract air flow rate in
standard mode.
Flow rate
extract air (m³/h)
Display
regulating valve
100
4
150
6
200
8
250
10
300
10
Condensate drain
A condensate drain hose of 2.5 m
length is connected to the appliance.
never kink this hose, to ensure the
condensate drains perfectly. Upstream
and downstream of the siphon, the
hose must have a continuous slope
no less than 10%. ensure the level
installation of the equipment.
Power supply
route power supply and control
cables separately. the ventilation
appliance must be able to be
separated from the mains power
supply by an additional isolator
that disconnects all poles with at
least 3 mm contact separation. For
this purpose, use contactors, main
isolators or fuses etc. on site. the
terminals are located beneath the
lower front facia, top right hand side.
Air routing
the installation should be
implemented in line with the
stiebel eltron technical guides.
convEctor HEatEr modUlE lwm 250
Electrical connection LWM 250
1
Heat pump
2
extract air module
3
Heat exchanger
4
Defrost valve
5
brine pump
6
Flow regulating valve
7
Heat source
* with the wPC, the brine
circuit pump is factory-fitted
M1 Fan motor
M2 Motorised valve
K1 relay "cooling"
s1 time switch
X1 terminal
X2 earth block
Summary of Contents for Heat pumps
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