Compensators (Accessories); Flexible Connection Pipes (Accessory) - Wilo Comfort Co R-Mvi Serie Manual Del Usuario

In general, the following procedure applies:
Connect the tank without mechanical tension
before commissioning. This means that the con-
nection must be made with flexible components,
like compensators or hoses.
The tank overflow must be connected according
to the applicable regulations (in Germany,
DIN 1988/T3).
Take suitable measures to prevent heat transmis-
sion through the connection pipes. PE tanks in the
Wilo range are only designed to accommodate
clean water. The maximum temperature of the
water must not exceed 50 °C!
Caution! Risk of material damage!
The tanks are designed statically for their nom-
inal capacity. Subsequent changes can affect
the static forces and cause impermissible defor-
mations or lead to the tank being destroyed!
The electrical wiring (protection against low water
level) to the system's control device must also be
connected before the pressure boosting system is
commissioned (see the details in the installation
and operating instructions for the control device).
NOTICE!
Before filling the tank, clean it and flush it!
Caution! Health hazard and risk of damage!
You must not walk on plastic tanks! Walking on
the cover or subjecting it to loads can cause
accidents resulting in damage!

7.2.8 Compensators (accessories)

For stress-free installation of the pressure boost-
ing system, connect the pipes using compensa-
tors (Fig. 8, B). The compensators must be
equipped with a structure-borne noise-insulating
extension limiter to absorb the reaction forces
that occur. The compensators must be installed
stress-free in the pipes. Compensators must not
be used to compensate for alignment errors or
pipe displacement.
Nominal diameter,
Connection
DN 40
DN 50
DN 65
Table 2
NOTICE!
Flexible connection pipes are subject to wear in
operation. Regular checks for leakages or other
defects are necessary (see recommendations of
DIN 1988).
Installation and operating instructions Wilo-Comfort CO(R) .. MVI ... /.. MVIS ... /.. Helix V ... /.. Helix VE ...
Threaded
Screwed connection Male thread
Rp 1½"
Rp 2"
Rp 2½"
When installing, the screws must be tightened
uniformly, working across diagonals. The ends of
the screws must not project beyond the flange. If
welding work is done nearby, the compensators
must be covered for protection (sparks, radiated
heat). The rubber parts of compensators may not
be painted and must be protected from oil. The
compensators must be accessible for inspection
within the system at any time and must therefore
not be covered by the pipe insulation.
NOTICE!
Compensators are subject to wear. It is necessary
to regularly check for cracks or blisters, exposed
fabric or other defects (see recommendations in
DIN 1988).

7.2.9 Flexible connection pipes (accessory)

In the case of pipes with threaded connections,
flexible connection pipes can be used for stress-
free installation of the pressure boosting system
and in the event of slight pipe displacement
(Fig. 9, B). The flexible connection pipes in the
Wilo range consist of a high quality stainless steel
corrugated hose with stainless steel braiding. A
flat-sealing stainless steel screwed connection
with a female thread is provided at one end for
installation on the pressure boosting system. A
male pipe thread is provided at the other end to
connect to further pipework. Depending on the
size, certain maximum permissible deformation
limits must be met (see Table 2 and Fig. 9). Flexi-
ble connection pipes are not suitable for absorb-
ing axial vibrations and compensating the
corresponding movements. A suitable tool must
be used to prevent kinking or twisting during the
installation. In the event of angular displacement
of the pipes, it is necessary to fixate the system to
the floor, taking into account suitable measures to
reduce the structure-borne noise. The flexible
connection pipes in the system must be accessible
for inspection at any time and must therefore not
be covered by the pipe insulation.
Conical Max. bend radius
RB in mm
R 1½" 260
R 2" 300
R 2½" 370
English
Max. bend angle
BW in °
60
50
40
17