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Danfoss District Energy
VI.GP.V2.02
DKDHR
Instructions
Akva Lux II VX3
Domestic hot water
The domestic hot water is prepared in a heat exchanger based on the
flow principle and the temperature is controlled by a combined hy-
draulic and thermostatic self-acting controller PTC2+P with integrated
differential pressure controller, which blocks the flow of primary and
secondary side flow through the heat exchanger immediately after
completion of the tapping process.
DHW temperature control
Danfoss PTC2+P controller (1) for DHW. The DHW temperature is adjusted
by turning the lever towards “+” (warmer) or “-” (colder).
Start by turning the handle
clockwise
- until stop /until the handle can
not be turned anymore. Then turn the handle
counter-clockwise
until
the temperature of the tap water is approx. 48° C at normal use (7-8 l/
min). The temperature should never exceed 55° C to avoid lime scale
precipitation.
Bypass or circulation thermostat
B
ypass thermostat (default).
As a standard the Akva Lux II VX3 is equipped with a bypass thermostat,
Danfoss FJVR (2), which ensures that hot water is produced immedi-
ately, when tapping starts. It is recommended to set the thermostat
in pos.3. If the water temperature rises too slowly it can be necessary
to set the thermostat at higher value.
Alternatively a DHW circulation system must be installed.
DHW recirculation
For Akva Lux II VX3 switching to recirculation is possible from a con-
structional point of view, requiring only an additional circulation
set.
The circulation set is not included in the delivery and must be or-
dered separately and mounted on site.
See instructions for mounting of circulation set on page 14.
Remember always to mount circulation pump, non-return valve and
safety valve on the circulation pipe. The pump must be installed so
Handle for temperature setting
1
2
Approximate scale settings
2 = 30° C
3 = 40 °C
4 = 45° C
I = 50° C
(max. temperature)
