4. Service and maintenance
Fig. 17 Bleeder
Fig. 18 Activated carbon filter
Fig. 19 Cover
Fig. 20 Bayonet locking cap
4.7 How the emergency valve works
Locking position:
The backwater flap is
closed by pressing the TEST key (flap).
The backwater flap works as a pipe bar-
rier. This function is only considered as
protection from backwater during longer
periods of absence (e.g. holidays).
Connected draining points are still drai-
ned.
After return, the emergency valve
must be re-opened again for normal
operation:
by pressing the TEST key
(flap) again.
Make sure that there is no backwater
when this takes place.
4.8 Servicing the ventilation
The ventilation (see spare parts section 6)
must be cleaned regularly and the activa-
ted carbon filter (Fig. 18) must be changed
annually or as required.
The ventilation must be cleaned and
checked after every pump failure.
The bleeder (Fig. 17 from right to left) com-
prises seal, drain body, float ball, seal,
bayonet locking cap, activated carbon fil-
ter and cover.
Pull the cover off (Fig. 19) by tilting it slight-
ly to the side. Then turn bayonet locking
cap (Fig. 20)
➀
and pull it up and off
②
.
Remove seal and float ball and clean
everything. Re-assembly takes place in
reverse order.
➀
➁
Abb. 17
Emergency flap can be locked by hand
20
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