Wilo Star RS Instrucciones De Instalación Y Funcionamiento página 19

Caution risk of short-cir-
cuit!
After electrical connections
the terminal box cover must
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
– Close the valve on the discharge
automatic
– Carefully loosen and fully remove
– Carefully push pump shaft back
– Protect all electrical parts against
– Switch-on pump.
ATTENTION!
– After 15...30 s tighten the vent plug.
– Re-open isolating valve,
Speed setting
If the rooms cannot be sufficiently
heated, the speed of the pump may
be too low. In this case you will need
to switch to a higher speed.
If, on the other hand, the pump is set
at too high a speed, flow noise may
occur in the lines and in particular at
throttled thermostatic valves. This can
be rectified by switching to a lower
speed.
and/or installation
temperature) the pump/mo-
tor can become very hot.
side.
Risk of scalding!
Depending on the fluid tem-
perature and the system
pressure, if the vent screw is
completely
liquid or vapour can escape
or even shoot out at high
pressure.
the vent plug with a suitable scr-
ewdriver (Fig. 9).
several times with screwdriver.
the leaking water.
It is possible that the
pump blocks with the
vent plug open, de-
pending on the system
pressure.
ENGLISH
(fluid
loosened hot
19