Danfoss PAHT Operation, Installation, And Maintenance Manual page 84

Operation guide
Wiring
14.
Level indicator
Level and temperature indicators
must be tted. Follow installation
instructions
15.
Rotation direction
1 2
?
Check pump drive motor rotation
direction matches that of the pump
prior to installation
16.
Bleeding the pump will ensure correct
cooling and lubrication
84 | 180R9288_AQ109686503100en-001301
Installation, Operation and Maintenance Manual for PAHT 20-90 pumps
Missing or incorrectly connected level
and temperature indicators cause
damage
Incorrect rotation direction will
damage the pump
Bleeding
Insu cient bleeding may cause dam-
age (not applicable to Power Packs)
Starting procedure
Cleaning procedure
1. Fill cold water into the system via the return lter and
bleed the pump (Power Packs PPH 4 - 6.3 - 10 and 12.5 are
self-bleeding)
2. Start and bleed the system -without pressure by opening
the bypass valve
3. Add the cleaning agent to give 3% agent/water solution
4. Run the system for 60 min. and activate all components as
often as possible to ensure e ective ushing with the
cleaning agent
5. Empty the system of the cleaning agent solution
Flushing procedure
6. Fill cold water through the return lter and bleed the
pump (Power Packs PPH 4 - 6.3 - 10 and 12.5 are
self-bleeding)
7. Run the system for 30 min. and activate all components as
often as possible
8. Empty the system of the water
9. Alternatively the system may be ushed by running the
unit without the return hose while continuously lling up
water. The ushing should continue until there is no trace
of cleaning agent in the return water
10. Change the return lter element, ll cold water through
the return lter and bleed the pump during start up
11. The system is now ready for operation
Starting procedure
60 min.
Observing the starting procedure will
ensure problem-free operation
2-3
days
If the system is not cleaned before
starting, the lter will clog
© Danfoss | 2023.12