Flexible Connection Lines (Accessory); Electrical Connection - Wilo FLA-Serie Einbau- Und Betriebsanleitung

7.2.7 Flexible connection lines (accessory)

In the case of pipes with threaded connections,
flexible connection lines can be used for stress-
free installation of the system and in the event of
slight pipe displacement (see Fig. 8a/b for exam-
ple). The flexible connection lines from the Wilo
range consist of a high quality stainless steel cor-
rugated hose, sheathed with stainless steel braid-
ing. A flat-sealing stainless steel screw
connection with internal 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 admissible deformation limits must be met
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
NOTE!
Flexible connection lines 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-FLA
(see Table 3 and Fig. 8a and 8b). Flexible connec-
tion lines are not suitable for absorbing axial
vibrations and compensating the corresponding
movements. A suitable tool must be used to pre-
vent 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, tak-
ing into account suitable measures to reduce the
structure-borne noise. The flexible connection
lines in the system must be accessible for inspec-
tion at any time and must therefore not be cov-
ered by the pipe insulation.
Tapered male thread Permissible bend
radius
∞
up to RB in mm
R 11/4" 220
R 11/2" 260
R 2" 300
R 21/2" 370

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.
English
Max. bend angle
0 to BA in °
75
60
50
40
35