Wilo Atmos GIGA-N - Pipework; Aligning the Unit

Installation and electrical connection en
Installation and operating instructions Wilo-Atmos GIGA-N 19
6.6 Pipework
The pipe connections of the pump are fitted with dust caps so that no foreign objects
can penetrate during transport and installation.
▪These caps must be removed before connecting pipes.
r
5 x DN
d s
r ≈ 2,5 · (d - 2s)
Fig.10: Connecting the pump without tension,
settling section upstream and downstream 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.
▪The pipes and pump must be free of mechanical stress when installed.
▪The pipes must be fixed in such a way that the pump does not have to support the
weight of the pipes.
▪Clean, flush and purge the unit before connecting the pipes.
▪Remove the covers from the suction and discharge ports.
▪If required, install a dirt filter upstream of the pump in the pipe on the suction side.
▪Then connect the pipes to the pump connecting pieces.
6.7 Aligning the unit
CAUTION
Incorrect alignment can result in property damage!
The transport and installation of the pump can affect the alignment. The motor must
be aligned to the pump (not vice versa).
• Check the alignment before the first start.
CAUTION
Changes to the alignment during operation can result in property dam-
age.
The pump and motor are usually aligned at ambient temperature. Thermal expansion
at operating temperature can change the alignment, particularly in the case of very