Compensators (Accessories); Flexible Connection Pipes (Accessory); Electrical Connection - Wilo FLA Compact Notice De Montage Et De Mise En Service

7.2.5 Compensators (accessories)

To install the system without tension, the pipes
must be fitted with compensators. The compen-
sators must be equipped with a structure-borne
noise-insulating extension limitation to absorb
the reaction forces that occur. The compensators
must be installed without tension in the pipes. No
alignment errors or pipe displacement must be
compensated for with compensators. The screws
should be tightened evenly crosswise during the
installation. The ends of the screws must not pro-
ject beyond the flange. In the event of welding
work the compensators, they must be covered for
protection (sparks, radiated heat). The rubber
parts of compensators must not be painted and
must be protected from oil. The compensators
must be accessible for inspection within the sys-
tem at any time and must therefore not be cov-
ered 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 of
DIN 1988).
Nominal diameter of Thread of screwed
connection connection
DN 32 Rp 11/4"
DN 40 Rp 11/2"
DN 50 Rp 2"
DN 65 Rp 21/2"
Table 3
NOTICE!
Flexible connection pipes are subject to wear in
operation. Regular checks for leakages or other
defects are necessary (recommendations of
DIN 1988).

7.3 Electrical connection

DANGER! Risk of fatal injuries!
The electrical connection must be established in
compliance with the local regulations (VDE reg-
ulations) by an electrical installation engineer
approved by the local energy supply company.
To make the electrical connection, the corre-
sponding installation and operating instructions
for the control device and attached electrical wir-
ing diagrams must be observed.
Installation and operating instructions Wilo-FLA Compact

7.2.6 Flexible connection pipes (accessory)

In the case of pipes with threaded connections,
flexible connection pipes can be used for stress-
free installation of the system and in the event of
slight pipe displacement (see Fig. 8a/b, item B for
example). The flexible connection pipes from the
Wilo range consist of a high quality stainless steel
corrugated hose, sheathed with stainless steel
braiding. A flat-sealing stainless steel screw con-
nection with female thread is provided on one end
for fitting to the system. A male pipe thread is
provided at the other end to connect to further
pipework. Depending on the size, certain maxi-
mum permissible deformation limits are to be met
(see table 3 and Fig. 8a/8b, RB and BW). Flexible
connection pipes are not suitable for absorbing
axial vibrations and compensating the corre-
sponding 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. (example
Fig. 8a/b, item C). 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.
Tapered male thread Permissible bend angle
∞
R 11/4" 220
R 11/2" 260
R 2" 300
R 21/2" 370
Before commissioning the system, the electrical
connection for protection against low water level
and overflow sensor must also be made with the
control device of the system (plug-in connection
below the switch cabinet (Fig. 1a, item 52X20 or
Fig. 1b, item 42A-X20 and 42B-X20) for overflow
and low water sensor from the break tank).
Max. bend angle
up to RB in mm 0 to BW in °
75
60
50
40
English
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