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Beschikbare talen
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The function of the diaphragm pressure vessel
influences the switching frequency. The fre-
quency of switching procedures decreases as the
tank volume increases.
In order to optimise the switching procedures, set
a gas supply pressure in the diaphragm pressure
vessel that is appropriate for the switch-on pres-
sure (acc. to Table 1, section 8).
7 Installation and electrical connection
7.1 Installation
The domestic water system must be installed and
operated acc. to local regulations. It must be
installed in an enclosed, dry, well ventilated room
that is protected against frost. The installation
room must be provided with floor drainage with an
adequate capacity, connected to the drainage
system of the building. Follow-on damage that
can be caused by failure of the domestic water
system, such as flooding of rooms, shall be pre-
cluded by the end-user by taking suitable meas-
ures (e.g. installing a fault signalling system or an
automatic drainage system. Suction and pressure
pipes shall be installed onsite. In case of fixed or
stationary installation, the domestic water system
shall be attached to the floor onsite. The installa-
tion surface must be horizontal and flat. Space
shall be allowed for maintenance work.
NOTE:
Never install the domestic water system on an
uneven bearing surface!
To avoid structure-borne noise transmission, the
domestic water system must be connected to the
suction and pressure pipes via flexible hose
adapters. In case of additional onsite attachment
to the ground, make sure that suitable measures
are provided in order to avoid structure-borne
noise transmission (e.g. by a cork pad, vibration
absorbers or the like). Appropriate holes are pro-
vided in the mounting feet of the domestic water
systems so that it can be secured to the ground
(see Fig. 1, L2 and P1).
7.1.1 Domestic water system in inlet mode (Fig. 2)
A non-self-priming pump is supplied with water
via the inlet connection. The water supply can be
from the public water supply system or a container
located at a higher level.
CAUTION!
In order to guarantee correct operation, the
pumps require the water supply to be at least
300 mm away, i.e. the consumer line must be
routed upwards and start at least 300 mm away
from the pump.
Suitable stop valves shall be installed in the inlet
pipe and the consumer line (Fig. 2, no. 11 or 12).
The inlet pipe shall be provided with a non-return
valve (Fig. 2, no. 13) or a spring-mounted foot
valve (Fig. 2, no. 10). The diameter of the inlet
pipe is not allowed to be less than the diameter of
the pump's suction connection.
24
To avoid stresses being communicated by the
weight of the piping, the piping must be secured
to the structure using suitable attachment devices
(Fig. 2, no. 14).
7.1.2 Domestic water system in suction mode (Fig. 3)
With a self-priming pump or a non-self-priming
pump operating in suction mode from containers
on a lower level, it is necessary to install a sepa-
rate, vacuum and pressure-resistant suction line
with foot valve (Fig. 3, no. 10). This must be
installed continuously rising from the container to
the pump connection on the on suction side. The
foot valve shall be positioned so as to achieve a
distance of 100 mm from the base of the con-
tainer and a minimum water coverage of 200 mm
at the lowest possible water level. In all cases, it is
recommended for a suction hose set (comprising a
suction hose and foot valve) to be used. A floating
extractor should be installed in order to prevent
coarse contaminants being sucked in from the
base area of the container.
Suitable stop valves shall be installed in the con-
sumer line (Fig. 3, no. 12).
All connection lines shall be installed on the sys-
tem without tension, using detachable connec-
tions. The weight of the connection lines must be
secured to the structure using suitable attach-
ment devices (Fig. 3, no. 14).
7.2 Electrical connection
DANGER! Danger of death!
Electrical connection must be carried out by an
electrician authorised by the local electricity
supply company and in accordance with the
applicable local regulations [e.g. VDE regula-
tions].
It is recommended for the domestic water system
to be connected via a residual-current-operated
protection switch. The appropriate regulations
acc. to VDE 0100 Part 702 shall be complies with
for use in swimming pools and garden ponds.
Mains connection:
• EM version: Connection via connecting cable with
plug (Fig. 1, no. 6)
• DM version: Connection by onsite connecting
cable (for diagram, see Fig. 5b)
• The cover of the pressure switch must be
removed for this purpose (Fig. 5)
• A four-core cable must be routed to the termi-
nals R-S-T (phases) and the earthing connec-
tion (green/yellow)
• The domestic water system is only allowed to
be operated with an electrical connecting cable
(including extension cable) which has at least
a rubber sheath of type H07 RNF acc. to
DIN 57282 or DIN 57245.
The electrical plug connections shall be installed
where they are protected against overflowing
water and against moisture. The electrical system
shall be installed acc. to the specifications in the
corresponding operating instructions. The techni-
cal data of the circuits to be connected shall be
WILO SE 11/2010
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