Wilo Star RS Notice De Montage Et De Mise En Service page 19

ENGLISH
4 Description of
pump/accessories
Products delivered
– Complete pump
– 2 flat gaskets,
– Installation and operating in-
structions
Pump description
In the wet-running pump all rota-
ting parts are surrounded by the
flow medium, including the motor
rotor.
A shaft seal, which would be sub-
ject to wear and tear, is not requi-
red. The pumping medium lubrica-
tes the friction bearing and cools
both bearing and rotor.
No motor overload protection is
required.
Even the maximum overload cur-
rent cannot damage the motor. The
motor operates non-overloading.
Speed setting (Fig. 8)
The speed of the pump can be
adjusted with a 3-position rotary
button. In position 3 the speed is
approx. 40...50 % of the maximum
speed with the power consumption
being reduced to 50 %.
Particular features of the pumps
Double pumps contain two identi-
cally constructed pump heads in a
common pump housing with inte-
grated change-over
pump can run in single mode, and
both pumps can also run simulta-
14
flap. Each
neously in parallel mode. The ope-
rating modes are main/reserve
operation or incremental/peak-load
operation. The pump heads can be
selected of different capacities.
Double pumps are suitable of
adapting a pipe system to suit indi-
vidual load characteristics. The
S2R 3D control unit must be
connected to control the different
operating modes.
The ST 20 (25)/... pump is a solar
thermal pump with special hydrau-
lics (pump housing coated) for use
in thermal solar systems.
The AC 20/...-I(O) pump is an air-
conditioning pump with a plasitc
(composite) pump housing for use
in air-conditioning units and cold-
water distribution.
In the AC ../..-I:
(I = inline) pump the pump housing
is designed „inline"-, i. e. suction
and pressure connections are in
line.
The AC ../..-O:
(O = offline) pump is equipped with
axial suction and radial discharge
connection.
Accessories
Accessories must
separately.
– Inserts for the pipe connection of
the screwed-pipe pump.
– S2R 3D switchgear for double
pump.
be ordered