Wilo COR-1HELIX VE5203/3/VR, Инструкция по установке и эксплуатации

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Installation and operating instructions Wilo-Economy CO-1, CO/T-1;-Comfort-Vario COR-1 27
7.2.2 Hydraulic connection and pipes
• When connecting to the public potable water
mains, the requirements of the local water supply
company must be met.
• First perform all the welding and soldering work
and the necessary flushing and, if necessary, dis-
infecting of the pipework and the supplied boost-
ing system (see 7.2.3) before connecting the
system.
• The customer’s pipes must be installed free from
stresses. Expansion joints with extension limiters
or flexible connection lines are recommended for
this purpose in order to avoid stresses on the pipe
connections and to minimise the transmission of
system vibrations to the building pipework. In
order to prevent the transmission of structure-
borne noise to the building, do not secure the pipe
clamps to the system pipes (see Fig. 8 for exam-
ple).
• The flow resistance of the suction line must be
kept as low as possible (i.e. short pipe, few elbows
and sufficiently large stop valves), otherwise the
protection against low water level may respond
through severe pressure losses in the event of
high volume flows. (Observe NPSH of the pump,
avoid pressure loss and cavitation.)
7.2.3 Hygiene (TrinkwV 2001)
The pressure boosting system you have received
complies with applicable technical standards and
has been checked at the factory to make sure it
functions perfectly. Please remember that when
used in potable water applications, the complete
potable water supply system must be transferred
to the operator in a perfectly hygienic condition.
Be sure to observe the applicable local regulations
as well. (In Germany: DIN 1988, part 2 section
11.2, and the commentaries on the DIN standard;
according to TwVO § 5, para. 4 , this also includes
microbiological requirements, flushing if neces-
sary and also disinfecting in some circumstances.
The limit values to be met are given in TwVO § 5).
WARNING! Contaminated potable water is a
health hazard!
• Flushing the pipes and the system reduces the
risk of affecting the quality of the potable
water!
• The water must be completely replaced after a
long period of system standstill.
Once the system is delivered, install it in the
intended installation location and connect it up as
soon as possible. Always flush the system.
For the simple flushing of the system, we recom-
mend the installation of a T-connector on the
consumer side of the system (if there is a dia-
phragm pressure vessel on the discharge side,
immediately after it) in front of the next shut-off
device. Its branch, provided with a shut-off
device, drains into the waste water system during
the flushing process and has to be suitably dimen-
sioned according to the maximum volume flow of
the pump (see also diagram in Fig. 7a and 7b). If it
is not possible to achieve free drainage, the
requirements in DIN 1988 part 5 must be
observed when connecting a hose, for example.
7.2.4 Dry-running protection/protection against low
water level (accessory)
• To fit dry-running protection:
• Direct connection to the public water mains:
screw in the low-water protection device (WMS)
on one of the necks provided for that purpose in
the suction line (if retrofitting) or on the drain-
age connection of the pump, and seal it (Fig. 6a).
You will also need the WMS connection kit for
CO-1... if installing on the pump drainage con-
nection. Connect the wiring to the control
device according to the installation and operat-
ing instructions and wiring diagram of the con-
trol device.
• Systems from series CO/T are already fitted as
standard with a float switch for level monitoring
as a dry-running protection device (Fig. 9).
• In the case of indirect connection via a Wilo
break tank, a float switch for level monitoring is
likewise already installed as a standard dry-run-
ning protection fitting. All that is needed is to
connect the wiring to the control device of the
system according to the installation and operat-
ing instructions and wiring diagram of the con-
trol device. Also follow the operating
instructions of the break tank.
• In the case of an indirect connection, i.e. for
operating with the customer’s tanks:
fit the float switch in the tank so that if the
water level drops to approximately 100 mm
above the draw-off connection, the “low water”
switching signal is transmitted.
Alternatively:
install 3 submersible electrodes in the break
tank. The arrangement is as follows: the first
electrode should be placed just above the floor
of the tank as an earth electrode (must always
be submerged) and for the lower switching level
(low water) a second electrode should be placed
approximately 100 mm above the draw-off
connection. For the upper switching level (no
longer low water) a third electrode should be fit-
ted at least 150 mm above the lower electrode.
Connect the wiring to the control device
according to the installation and operating
instructions and wiring diagram of the control
device.