Danfoss APP 1.0, Инструкция по установке, эксплуатации и обслуживанию

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8 180R9262 / IOM APP 0.6-1.0 Appendices - v02 / 12.2012
Data sheet APP 0.6-1.0
7.2 Storage
Frost protection is required at temperatures
below 2°C. Danfoss recommends to use
DOWFROST from DOW Chemical Company or
Chilsafe mono propylene glycol from Arco
Chemical Company.
8. Noise level
The table indicates the
approximate
noise level
in dB(A) measured at a distance of 1 m from the
pump in a reverberation room:
Type 60 bar (870 psi) 60 bar (870 psi)
1500 rpm 3000 rpm
APP 0.6
70 73
APP 0.8
73 75
APP 1.0
73 75
Generally, noise will be reduced if speed is
reduced and vice versa. Use
fl exible hoses in
order to minimize vibrations and noise.
Since the pump is typically mounted on a bell
housing or frame, the noise level must be
determined for the complete unit (system).
It is therefore very important that the motor/
pump unit is mounted correctly on a frame with
antivibration isolation to minimize
vibrations and noise.
The noise level is in
fl uenced by:
t
The speed of the pump, high rpm create
more noise than low rpm
t
Rigid mounting of the pump generates
more noise than
fl exible mounting
t
Pipe mounting direct to the pump
increases the noise level compared to a
fl exible hose
9. Filtration
As water has very low viscosity, the APP pumps
have been designed with very narrow clearance
in order to control internal leakage rates and
improve component performance. Therefore it is
important that the inlet water is
fi ltered properly
to minimize the wear of the pump.
The main fi lter must have a fi ltration e ffi ciency of
99.98% at 10 µm. We recommend to use
precision depth
fi lter cartridges rated 10µm abs.
ß10>5000 (equivalent to a fi ltration e ffi ciency of
99.98%). Bag fi lters and string wound fi lter
cartridges typically have only 50% fi ltration
e ffi ciency.
This means that for each 100,000 particles
reaching the
fi lter, 50,000 particles pass through
it compared to only 20 particles in a fi lter with an
e ffi ciency of 99.98%.
For more information on the importance of
proper
fi ltration, please consult our publication
“Filtration” (code number 521B1009), which also
will provide you with an explanation of
fi ltration
de fi nitions and a guidance on how to select the
right fi lter.
Storage temperature:
-40°C to +70°C (+40°F to 158°F) – provided that
the pump is drained of
fl uid and stored
”plugged”