Danfoss PAHT Operation, Installation, And Maintenance Manual page 82

Operation guide
Design
1.
Choice of material
.
Rubber
.
Plastic
.
Stainless steel
Always use system components made
of corrosion proof materials
2.
Choice of lter
m
< 10 m abs.
Install a 10 micron absolute lter with
pressure switch
3.
Filter location
Locate the return lter in the return line
immediately before the tank
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Installation, Operation and Maintenance Manual for PAHT 20-90 pumps
.
Iron
.
Copper
.
Brass
.
Aluminium
Non-corrosion proof materials
may cause damage
m
> 10 m
Return lter with bypass valve and
m
poorer lterability than 10 will
damage the system
Placing the return lter upstream of the
nal load may damage the pump
4.
Pump location
Pump always to be placed below water
surface level
5.
Suction conditions
System to be dimensioned to provide
a suction pressure of the pump inlet of
max. 0.1 bar vacuum
6.
Pressure Relief valve
Pressure relief valve to be mounted
vertically or with vertical outlet and
connected to return hose or tank
7.
Water supply
System to be lled via lter
Pump location above water surface
level will cause damage
Poor suction conditions will cause
malfunction and damage the pump
Coupling the pressure relief valve outlet
directly to the pump inlet may damage
the pump
Filling system with un ltered
water causes damage
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