26 DKDHR
VI.HE.A1.02
Danfoss District Energy
Instructions for installation and use
Akva Lux II TDP-F
10.0 Adjustment and commissioning of the Akva Lux II TDP-F variants
General information
PLEASE NOTE! Some models may have a slightly different appearance, but
the control function is in principle the same as described below.
Maintenance and commissioning
The insulation front panel on Akva Lux II TDP-F, Type 004U8264 can be
removed without using tools. Take hold in the right side of the front insu-
lation and pull carefully forward until the front insulation section releases
from the rear section.
Fasten the front insulation section with a slight pressure on the sides and
upper part.
Please note that the Akva Lux II TDP-F, Type 004U8264 is not mechanically fixed
in the rear insulation section and must be handled by lifting in both pipes and
insulation simultaneously.
The cover on Akva Lux II TDP-F, Type 004U8089 and 004U8044 and be
removed without using tools.
Perform maintenance procedures according to the maintenance fre-
quency chart presented in the section entitled “Operation and main-
tenance” on pages 30 - 31. Perform adjustment in accordance with the
instructions below.
For cleaning of plate heat exchanger, please see page 30.
Commissioning
Commission the substation in accordance with the instructions on pages
10-13.
Domestic hot water
The domestic hot water is prepared in the heat exchanger based on the
flow principle and the temperature is controlled by a combined hydrau-
lic and thermostatic self-acting controller
PTC2+P
(Fig. 1a) with inte-
grated differential pressure controller, which blocks the flow of primary
and secondary side flow through the heat exchanger immediately after
completion of the tapping process.
Option: Alternatively the temperature is controlled by a hydraulic self-acting
controller PM2+P (Fig. 1b).
Regulation of the hot water temperature PTC2+P
Set the DHW temperature by moving the adjuster lever towards “+” (hotter)
or “-” (colder). Start by turning the lever
clockwise
– until it stops/until you
cannot turn it any further. Then turn the lever
counter-clockwise
until
the temperature of the tap water is approx. 48°C during normal tapping
flow (7–8 litres per min.).
Regulation of the hot water temperature PM2+P
Set the DHW temperature by turning the adjuster lever towards red (hot-
ter) or blue (colder). Start by turning the lever clockwise - until the pin is
opposite the blue dot. Then turn the lever counter-clockwise until the
temperature of the tap water is approx. 48°C during normal tapping flow
(7–8 litres per min.).
NB! The pin must be positioned between the blue
and red dot, otherwise the controller will shut down.
The temperature must never exceed 55°C to prevent limescale deposits
building up in the water heater.
By-pass function (factory connection).
The Akva Lux II TDP-F substations are supplied with the a Danfoss FJVR
bypass thermostat (Fig. 2), so that when water is tapped, the water heater
immediately starts to produce hot water. We re-commend setting of the
thermostat in pos. 3. If you have to wait a long time (i.e. more than 20 sec.)
for hot water, it may be necessary to position the thermostat higher than
pos. 3. If you want to avoid waiting time altogether, you will need to set
up domestic hot water recirculation to the tapping points.
Circulation thermostat / conversion to recirculation.
In systems with recirculation, the thermostat (Fig. 2) functions as a circu-
lation thermostat, and the temperature of the circulation water can be
set independently of the domestic hot water temperature selected. We
recommend setting of the thermostat to pos. 3. For instructions about
how to set up a recirculation connection, see pages 14-25.
Fig. 1a
Fig. 2
Type 004U8264
Type 004U8044
Type 004U8089
Fig. 1b
Adjuster lever
Adjuster lever
Scale setting (indicative)
Pos. 2 = 30°C
3 = 40°C
4 = 45°C
Indicator
