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Instructions for installation and use
Differential pressure controller
The differential pressure controller reduces the high, fluctuating
pressure in the district heating network, ensuring constant ope-
rating pressure and thereby ensures the best possible operating
conditions.
Differential pressure controller AVPL
As standard a differential pressure controller type AVPL is mounted in
Akva Lux II TDP-F, type 004U8264.
The differential pressure controller is pre-set to 0.1 bar from the factory.
To alter the differential pressure, use an Allen key – NV3. One full turn is
equivalent to 0.01 bar. Turn clockwise to increase the pressure, counter-
clockwise to reduce it.
Recommended setting
Basically, it is recommended to open the controller to its full extent.
If disruptions to operation arise, such as noise or fluctuations/poor
regulation capacity, it may be necessary to adjust the differential
pressure controller to a lower operating pressure.
The controller can be adjusted subsequently – see the appendix entitled:
Instructions AVPL 1.0/1.6
Instructions
AVPL 1.0/1.6
1
5
r
kPa
20
25
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24
18
23
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9
3
8
2
7
1
6
0
5
2
6
3
4
7
VI.CB.T1.6K © Danfoss 05/03
1
7369316-0 SIBC
Differential pressure controller TD200
As standard a differential pressure controller type TD200 is mount-
ed in Akva Lux II TDP-F types 004U8089 and 004U8044.
This type of differential pressure controller is preset from factory and
should not be adjusted afterwards
Heating circuit, temperature control
The room temperature is regulated exclusively using the radiator
thermostats.
Return temperature limiter
Return temperature limiters are used to limit the return tempera-
ture of radiators.
The return temperature limiter FJVR is a self-acting P-band regula-
tor, which regulates according to the temperature of the heating
medium.
The FJVR includes a thermostatic element and a valve body. Once
the set temperature is exceeded, the valve shuts down and re-
opens only when the temperature has dropped below the set value.
The return temperature limiter should be set to the required maxi-
mum return temperature, in compliance with the local demands.
Scale setting (indicative:
I = 10° C
1 = 20 °C
2 = 30 °C
3 = 40 °C
4 = 45 °C
I = 50 °C (max. temperature)
To ensure sufficient cooling and proper operation the HE return
temperature must be lower than the temperature set on the flow
controller.
Danfoss District Energy
Akva Lux II TDP-F
TD200
VI.HE.A1.02
AVPL
27 27
DKDHR
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