English
38
WILO SE 07/2013
disconnect the mains supply for maintenance and
repair work on the system.
6.4 Noise
Depending on the power requirements, the sys-
tem is supplied with a wide variety of pumps
which may vary considerably in terms of their
noise and vibration characteristics. You can find
the relevant data in Section 5.2, in the installation
and operating instructions for the pump or in the
catalogue specifications for the pump.
WARNING! Health hazard!
In the event of sound-pressure levels of above
80 dB(A), the operating personnel and persons
who are nearby must wear suitable hearing pro-
tection.
7 Setup/installation
7.1 Installation site
• The pressure boosting system is installed in the
technical control room or in a dry, well ventilated
and frost-proof, separate room that can be locked
(e.g. as required by DIN 1988).
• Adequately dimensioned floor drainage (drain
connection or similar) must be provided in the
installation room.
• No harmful gases may enter the room or be
present there.
• Provide adequate space for maintenance work.
The main dimensions can be found in the supplied
installation plan. The system should be freely
accessible from at least two sides.
• The installation surface must be horizontal and
flat. A slight adjustment in height of the vibration
absorber in the base frame may be necessary to
achieve stabilisation. If this is necessary, undo the
counter nuts and unscrew the respective the
vibration absorber slightly. Then re-tighten the
counter nuts.
• The system is designed for a maximum ambient
temperature of +0°C to 40°C at relative humidity
of 50%.
• Installation and operation in the vicinity of living
rooms and bedrooms is not recommended.
• To avoid the transmission of structure-borne
noise and to ensure a stress-free connection to
the upstream and downstream pipes, expansion
joints (Fig. 7 - 30) with extension limiters or flexi-
ble connection lines (Fig. 7 – 31) should be used.
7.2 Installation
7.2.1 Foundation/bearing surface
The pressure boosting system is designed for
installation on a flat concrete floor. The base
frame is mounted on height-adjustable vibration
absorbers as means of insulation against struc-
ture-borne noise.
NOTE!
For transport reasons, the vibration absorbers may
not be installed upon delivery. Before installing
the system, make sure all the vibration dampers
are installed and locked by the threaded nuts (see
also Fig. 7; 8a and 8b – 34).
In the event of additional fixation to the floor by
the customer (similar to the example in Fig. 8–32),
make sure suitable measures are taken to avoid
structure-borne noise transmission.
7.2.2 Hydraulic connection and pipes
All hydraulic connection opening are sealed with
protective caps or plugs at the factory. They are to
be removed before beginning the connection
work.
CAUTION! Risk of detriment or damage!
Protective caps or plugs which have not been
removed can cause blocking and damage the
pump!
For connections to the public potable water sup-
ply network, the requirements of the responsible
local water supply company must be met.
First perform all the welding and soldering work
and the necessary flushing and, if necessary, dis-
infect the pipework and the supplied system (see
7.2.3) before connecting the system.
The customer’s pipes must be installed without
tension. Expansion joints with extension limiters
or flexible connection lines are recommended for
this purpose in order to avoid stress at the pipe
connections and minimise the transmission of
system vibrations to the building installation. In
order to prevent transmission of structure-borne
noise to the building, do not secure the piping to
the system pipework (see Fig. 7 for example).
The flow resistance of the suction line must be
kept as low as possible (i.e. short pipe, few elbows
and shut-off devices of sufficient size), otherwise
the protection against low water level may be
activated in the event of high flow rates due to
severe pressure losses. (Observe the NPSH of the
pump and avoid pressure losses and cavitation).
7.2.3 Hygiene (TrinkwV 2001)
The supplied pressure boosting system meets the
standards of current technology and in particular
satisfies DIN 1988. It has been checked at the fac-
tory to make sure it functions correctly. Please
remember that when used in the potable water
applications, the complete potable water supply
has to be handed over to the operator in a perfect
state of hygiene.
Also observe the corresponding specifications in
DIN 1988 Part 2 section 11.2 and the comments
on the DIN. TwVO § 5. paragraph 4 requires that
this also includes microbiological requirements,
flushing if necessary and under some circum-
stances also disinfecting. The limit values to be
observed can be taken from TwVO § 5.
Summary of Contents for Comfort-Vario COR-1***-/VR Series
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