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solid wire equipped with a plug
connection or an all-pole switch.
The width of the contact gap
must be at least 3 mm.
– To guarantee protection against
dripping water and the strain
relief of the PG screwed joint, a
connecting cable of suitable
external diameter is to be used
(e.g. H 05 VV-F 3 G 1.5).
– When using the pump in units
where the water temperature
exceeds 90 °C, a connecting
cable with corresponding heat
resistance must be used.
– The supply cable must be laid in
such a way that it never touches
the pipework and/or the pump
and motor casing.
– Check that the mains current
and voltage comply with the data
on the rating plate.
– Make
mains
shown in Fig. 6.
– The connecting cable can be fed
through the PG screwed joint eit-
her to the left or right. If neces-
sary, the blind plug and PG scr-
ewed joint are to be exchanged.
If the terminal box is positioned
on the side, always insert the PG
screwed joint from below (Fig. 5)
Caution risk of short-cir-
cuit!
After electrical connections
the terminal box cover must
16
connection
as
be closed properly, to pro-
tect against moisture.
– Pump/installation must be eart-
hed in compliance with regulati-
ons.
– When
connecting
switchgear (for double pumps),
follow the appropriate Installation
and Operating Instructions.
6 Operation
System filling and venting
The pump may need venting e.g. if
the heating and pump are working
but the heating element remains
cold. If there is air in the pump
chamber, the pump will not pump
water.
Carefully fill the unit with water.
Solar thermal systems must be fil-
led with ready for use mixtures. The
pump must not be used to mix the
medium in the system.
The pump is normally vented auto-
matically after a short operatinal
period. Short-term dry running will
not damage the pump. If it beco-
mes necessary to vent the pump,
please observe the following pro-
cedure:
– Switch off pump,
Risk of burning if the pump
is touched!
Depending on the opera-
ting condition of the pump
and/or
automatic
installation
(fluid
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