Danfoss APP series

180R9346 | AQ240486503020en-001702 | 41© Danfoss | 2023.03
Operation guide Installation, Operation and Maintenance APP 53-92 pumps
Warranty
Danfoss APP pumps are designed for long
operation, low maintenance and reduced
lifecycle costs.
Provided that the pump has been running
according to the Danfoss specications, Danfoss
guarantees 8,000 hours service-free operation,
however, max. 18 months from date of
production.
If Danfoss recommendations concerning
system-design are not followed, it will strongly
inuence the life of the APP pumps.
Other factors that aect pump performance and
lifetime include:
- Insucient ltration
- Insucient bleeding and venting
- Running the pump at speed outside
specications.
- Supplying the pump with water at
temperature higher than recommended.
- Running the pump at inlet pressure outside
specications.
- Running the pump at outlet pressure
outside the specications.
- Wrong direction of rotation.
Maintenance
After 8,000 hours of operation it is strongly
recommended to inspect the pump and change
any worn parts, e.g. pistons and shaft
seal. This is done in order to prevent a potential
breakdown of the pump. If the parts are not
replaced, more frequent inspection is
recommended according to our guidelines.
Pump shutdown:
The APP pumps are made of Duplex/Super
Duplex materials with excellent corrosion
properties. It is, however, always recommended
to ush the pump with freshwater when the
system is shut down.
When stopping the pump for more than 1 day
ush the pump for 10 sec. Flushing through the
ushing valve of the pump without rotating the
pump is not enough for cleaning the inside of the
pump.
The pump can be ushed with biocide like the
membranes. The biocide must be compatible
with the materials used in our pump (materials
can be found in the parts list in the instruction
and operational manual).
Repair
In case of irregular function of the APP pump,
please contact Danfoss High Pressure Pumps.
14. Service and warranty
Accessories Type Code num-
ber
Coupling APP 53 - APP 92 IEC 315 Diameter: motor Ø80 mm, pump Ø50 180Z4066
Coupling APP 53 - APP 92 IEC 280 Diameter: motor Ø75 mm, pump Ø50 180Z4081
Coupling kit APP 53 - APP 92 incl. bell housing IEC 315 Ø80/Ø50. IEC 315 Ø660/310 180Z4083
Coupling kit APP 53 - APP 92 incl. bell housing IEC 280 Ø75/Ø50. IEC280 Ø550/265 180Z4082
Base frame incl. vibration dampeners IEC 315 180Z0661
13. Accessories