Danfoss PAH 2 User Manual

Guideline Trouble shooting guide for PAH, PAHT, PAHT C , PAHT G pumps
66
180R9379 | AQ188686503004en-000801 | PAH 2-12.5 } 07.2022
5. Noise from installation
Cause Remedy Comments
5.1 Inlet/outlet connections (hoses/pipes) 5.1.1 Use exible hoses at inlet/outlet connec-
tions.
5.1.2 Mount the connections to the frame by a
vibration dampener mounting plate.
Non-exible connections mounted directly on
the frame will cause even small pressure
pulsations from pump and create vibrations in
the system/plant.
5.2 Length/dimension of inlet/outlet line 5.2.1 Increase pipe diameter and/or reduce the
number of bends.
Too small pipes or too many bends may create
too fast ow/turbulence through the pipes and
thus increase the noise level.
5.3 Hose stiness 5.3.1 Use a more exible hose. Too sti hoses cannot dampen the small
pressure pulsations from the pump, and
subsequently vibrations occur in the system/
plant.
5.4 Hoses/pipes mounted directly on frame 5.4.1 Mount the connections to the frame by a
vibration dampener mounting plate.
If the hoses are mounted directly on the frame,
the small pressure pulsations from the pump
can be transferred to the frame and the rest of
the system/plant.
5.5 Vibration dampener under the electric
motor
5.5.1 Mount a vibration dampener below the
motor/pump.
When no dampener is installed below the
electric motor, vibrations from the motor and
pump may be transferred to the frame and the
rest of the system/plant.

Danfoss PAH 2 Specifications

General

Brand	Danfoss
Model	PAH 2
Category	Water Pump
Language	English