ENGLISH
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4. Description of
Product and
Accessories
4.1 Description of Water Service
Pumps
Series Star-Z circulating water service
pumps have been specially designed
for use in conjunction with domes-
tic/drinking water service systems.
They are, by material selection and
design, corrosion proofed against any
residual parts in domestic/drinking
water. Speed setting: Z 25/6 and ZD
25/6 pump is equipped with a rotary
switch in the terninal box to enable
manual; 3-speed control [1 – 2 – 3)].
At minimum speed the maximum
speed is reduced to approx.
40 ... 50 %. The power input is reduced
to approximately 50 %.
Particular features of the pumps
Double pumps contain two identically
constructed pump heads in a com-
mon pump housing with integrated
change-over flap. Each pump can run
in single mode, and both pumps can
also run simultaneously in parallel
mode. The operating modes are
main/reserve operation or incremen-
tal/peak-load operation. The pump
heads can be selected of different
capacities. Double pumps are suita-
ble of adapting a pipe system to suit
individual load characteristics.
4.2 Scope of Supply
– Pump, complete.
– Installation and Operating
Instructions.
4.3 Accessories
Accessories available and/or required
on separate order:
– Union for pipe connections,
– S1R-h plug-in timer module for
1-phase motors only, except Z 25/6.
5. Siting
/
Installation
5.1 Installation
– Install pump only after all weld-
ing /soldering on the pipe system is
completed and the pipe system has
been thoroughly flushed out to be
clear of foreign matter and impu-
rities, as these may cause damage
to the pump.
– Mount pump in an easily accessible
position in order to facilitate later in-
spection and exchange.
– If used to handle domestic/drinking
water a non-return valve must be
provided and installed at the dis-
charge side.
– To avoid draining and re-filling the
whole of the pipe system on ex-
change of pump it is recommended
to provide and install isolating valves
at suction and discharge ports of the
pump, to be positioned in such a
way to prevent leakage dripping on
the pump motor or its terminal box.
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