32 DKDHR
VI.HE.A1.02
Danfoss District Energy
Instructions for installation and use
Akva Lux II TDP-F
Problem
Possible cause
Solution
No heat
Dirt strainer clogged on DH or HE side
(radiator circuit.
Clean dirt strainer.
Filter in district heating meter clogged.
Clean the filter (after consulting the
district heating plant).
Defective or wrongly set differential
pressure controller.
Check the functioning of the differential
pressure controller - clean valve seat if
required.
Defective room thermostat / actuator
Check the funtioning of the room ther-
mostat / actuator
Air pockets in the system.
Vent the installation throughly.
Uneven heat distribution
Air pockets in the system.
Vent the installation throughly.
Supply temperatur too low
Dirt strainer clogged
Clean dirt strainer
Poor cooling
Too small heating surface / too small
radiator in relation to the total heating
requirement of the building
Poor utilization of existing heating
surface
Increase total heating surface
Turn on all the radiators and prevent the
radistors in the system from becoming
warm at the bottom.
14.0 Trouble shooting
If operating disturbances occur, the following basic features
should be checked before carrying out acual troubleshooting:
- the substation is correctly connected,
- the district heating supply temperature is at the normal level
(summer at least 60 °C, winter at least 70 °C),
- the differential pressure is higher than or equal to the normal
(local) differential pessure in the district heating network. - If
in doubt, ask the district heating plant,
- the substation is connected to electricity (pump and
automatic,
- the dirt strainer in the district heating supply pipe is clean,
- air pockets in the system.
14.1 Troubleshooting - Heating
