Wilo Atmos TERA-SCH 150-555 Notice De Montage Et De Mise En Service page 22

en
22
Installation and electrical connection
r ≈ 2,5 · (d - 2s)
Fig. 15: Connecting the pump without tension, settling section upstream and down-
stream of the pump
CAUTION
Improper pipework/installation can lead to property damage! Welding
beads, cinder and other contaminants can damage the pump!
• The pipes must be sufficiently dimensioned, taking the pump inlet pressure into
account.
• Connect the pump and pipes using suitable gaskets. Take the pressure, temper-
ature and fluid into account. Check the gaskets for proper fitting.
• The pipes must not transfer any forces to the pump. Brace the pipes directly before
the pump and connect them without tension.
• Observe the permissible forces and torques on the pump connecting pieces!
• The expansion of the pipes in the event of a temperature rise is to be compensated
by suitable means.
• Avoid air pockets in piping by means of appropriate installations.
NOTICE
Simplify subsequent work on the unit!
• To ensure the entire unit does not have to be emptied, install a non-return valve
and shut-off devices before and after the pump.
NOTICE
Avoid flow cavitation!
• A settling section must be provided upstream and downstream of the pump in the
form of a straight pipe. The length of the settling section must be at least 5 times
the nominal diameter of the pump flange.
NOTICE
It is recommended that a strainer is installed in front of the suction pipe with a filter
surface of at least 3 times the pipe cross section (approximately 100 meshes per
cm²). The strainer must be far enough from the bottom to avoid excessive inlet
losses, which could impair pumping performance. It is advisable to check that there
is no leakage.
5 x DN
discharge
side
2 x Ø
suction side
WILO SE 2020-10