Danfoss APP 16-22 Operation Manual page 76

Operation guide
Design
1.
Choice of material Choice of material
. .
Rubber Rubber
. .
Plastic Plastic
. .
Stainless steel Stainless steel
Always use system components made Always use system components made
of corrosion proof materials of corrosion proof materials
2.
Choice of lter Choice of lter
m m
< 10 < 10 m abs. m abs.
Install a 10 micron absolute filter with Install a 10 micron absolute filter with
pressure switch pressure switch
3.
Filter location Filter location
Locate the return filter in the return line Locate the return filter in the return line
immediately before the tank immediately before the tank
76 | 180R9265 | AQ115586503035en-001003
Installation, Operation and Maintenance APP 16-22 pumps
. .
Iron Iron
. .
Copper Copper
. .
Brass Brass
. .
Aluminium Aluminium
Non-corrosion proof materials Non-corrosion proof materials
may cause damage may cause damage
m m
> 10 > 10 m m
Return filter with bypass valve and Return filter with bypass valve and
m m
poorer filterability than 10 poorer filterability than 10 will will
damage the system damage the system
Placing the return filter upstream of the Placing the return filter upstream of the
final load may damage the pump final load may damage the pump
4.
Pump location Pump location
Pump always to be placed below water Pump always to be placed below water
surface level surface level
5.
Suction conditions Suction conditions
System to be dimensioned to provide System to be dimensioned to provide
a suction pressure of the pump inlet of a suction pressure of the pump inlet of
max. 0.1 bar vacuum max. 0.1 bar vacuum
6.
Pressure Relief valve Pressure Relief valve
Pressure relief valve to be mounted Pressure relief valve to be mounted
vertically or with vertical outlet and vertically or with vertical outlet and
connected to return hose or tank connected to return hose or tank
7.
Water supply Water supply
System to be filled via filter System to be filled via filter
Pump location above water surface Pump location above water surface
level will cause damage level will cause damage
Poor suction conditions will cause Poor suction conditions will cause
malfunction and damage the pump malfunction and damage the pump
Coupling the pressure relief valve outlet Coupling the pressure relief valve outlet
directly to the pump inlet may damage directly to the pump inlet may damage
the pump the pump
Filling system with unfiltered Filling system with unfiltered
water causes damage water causes damage
© Danfoss | 2023.03