Installation; Foundation/Bearing Surface; Hydraulic Connection And Pipes; Hygiene (Trinkwv 2001) - Wilo Comfort Co R-Mvi Serie Manual Del Usuario

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.
NOTICE!
For transport reasons, the vibration absorbers may
not be installed upon delivery. Before installing
the pressure boosting system, check that all the
vibration absorbers are fitted and locked using
threaded nuts (also see Fig. 8, A).
Note:
If the customer also wants to secure the installa-
tion to the floor (similar to example Fig. 9, E), suit-
able measures must be taken to avoid structure-
borne noise transmission.

7.2.2 Hydraulic connection and pipes

For connections to the public drinking water sup-
ply network, the requirements of the responsible
local water supply company must be met.
The installation must not be connected until all
the welding and soldering work, necessary flush-
ing and, if required, disinfecting of the pipe sys-
tem and the pressure boosting system has been
done (see Point 7.2.3).
On-site piping installation must be completed
voltage-free! Compensators with extension limit-
ers or flexible connection pipes are recommended
for this purpose in order to avoid stress at the pipe
adaptors and minimise the transmission of system
vibrations to the building installation. In order to
prevent the transmission of structure-borne noise
to the building, do not secure the pipe clamps to
the pressure boosting system pipework (for
example, see Fig. 9, 10, C).
The connection is made either on the right or left
of the system, depending on the site conditions. It
may be necessary to move pre-assembled blind
flanges or threaded caps.
The flow resistance of the suction line must be
kept as low as possible (i.e. short pipe, few elbows
and sufficiently large shut-off devices), otherwise
the protection against low water level may suffer
severe pressure losses in the event of high volume
flows. (Observe the NPSH of the pump and avoid
pressure losses and cavitation).
Installation and operating instructions Wilo-Comfort CO(R) .. MVI ... /.. MVIS ... /.. Helix V ... /.. Helix VE ...

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
take into account that, when used in the drinking
water applications, the complete drinking water
supply must 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. Pursuant to TwVO § 5 Paragraph 4,
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.
WARNING! Contaminated drinking water is a
health hazard!
Flushing the pipes and system reduces the risk
of quality of the drinking water being impaired!
The water must be completely replaced after a
long system standstill!
Recommendation for simple flushing of the
system:
• Install a T-connector on the end pressure side of
the pressure boosting system upstream of the
next shut-off device. For a diaphragm pressure
vessel on the pressure side, place it directly down-
stream of this.
The T-connector branch, provided with a shut-off
device, drains into the waste water system during
the flushing process and must be dimensioned
according to the maximum volume flow of a single
pump (see Fig. 6 and 7, Item 28). If it is not possi-
ble to achieve free drainage, such as when con-
necting a hose, the requirements of DIN 1988 T5
must be observed.
7.2.4 Protection against dry running/low water level
(accessory)
Fitting dry-running protection
• In the event of a direct connection to the public
water supply network:
For systems with frequency control (COR – CC-FC
or CCe), a kit with a pressure sensor is installed on
the intake side. It monitors the supply pressure
and transmits this as a current signal to the control
device. In this case, no additional accessories are
necessary!
For systems without frequency control (CO – CC),
screw the protection against low water level
(WMS) kit into the connection port provided on
the suction collecting pipe and - if retrofitting -
seal it. Make the electrical connection in the con-
trol device according to the installation and oper-
ating instructions and the control device circuit
diagram (Fig. 5a and 5b).
• In the event of an indirect connection, i.e. for
operation with tanks provided by the customer:
Install the float switch in the tank so that the "low
water" switching signal is transmitted if the water
level drops to approximately 100 mm above the
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