Danfoss Akva Lux II TDP-F / Akva Vita II TDP-F Operating instructions

Danfoss
Brand
Danfoss
Model
Akva Lux II TDP-F / Akva Vita II TDP-F
Type
Operating instructions
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
District heating flat station for direct heating and
instantaneous domestic hot water
Akva Lux II TDP-F / Akva Vita II TDP-F
Instructions
Table of contents EASY START-UP ........................................................................2
Types / Main components ...................................................3
General / Mounting & Start-up ..........................................4
Description ...............................................................................6
Heating circuit .........................................................................6
Domestic hot water ...............................................................8
DHW circulation ......................................................................9
Troubleshooting HE ...............................................................14
Troubleshooting DHW ..........................................................16
Maintenance ............................................................................17
EU Declaration of conformity.............................................19
Primary SecondaryDomestic hot water
DHW DCW HE
return
HE
supply
DH
supply
DH
return
DCW
2
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
1. The substation is prepared for wall-mount-
ing. The mounting sheet on the back of the
substation has got holes for screw installa-
tion. Fasten the substation on the wall with
two screws, bolts, expansion bolts or the
like.
2. Prior to installation any unused connections
and shut-off valves should be sealed with a
plug.
3. Mount heat meter (see page 5).
4. IMPORTANT! Due to vibrations during trans-
port all connections must be checked and
tightened before the installation.
5. For systems with safety valve, connection
for drain must be established in compliance
with local regulations.
6. For installations with domestic hot water
circulation remember to switch from bypass
to DHW circulation control and to install
circulation pump and non-return valve.
Connect pump to power supply, but do not
switch on the pump (see item 10). Please
see instructions for domestic hot water
circulation control.
Mounting - start-up 7. Fill the heat exchanger / the system with
water. Then carefully open the ball valves
on HE supply, HE return and DH supply. Sub-
sequently open the ball valve on DH return
(Please note that the ball valves are not part
of the delivery).
8. Check the substation and the domestic
installation carefully for any leakage.
9. Perform pressure testing of the domestic
installation according to local regulations.
10. Switch on circulation pump, if any.
11. Heat up the system and vent the the system
by means of the air vents on the substation
and on the radiators, - (see pages 5 and 17).
12. Finally adjust the substation according to the
enclosed installation instructions.
13. IMPORTANT! Heating and cooling of the sys-
tem may cause leakages. Therefore tighten-
ing of all connections may be necessary after
commencement of operation.
EASY START-UP!
Dimensioned sketch /
Connections:
1 DCW inlet
2 DHW
3 DCW outlet
4 DH supply
5 DH return
6 HE supply
7 HE return
Depth: 150 mm
Connections size:
¾” IT
Type A Type B
Mounting and start-up.
Please follow the below start-up instructions.
Mounting holes
460 mm
21 3 4 5 6
65 mm 65 mm65 mm 65 mm
575 mm
7
65 mm 65 mm
21 3 4 5 6
65 mm 65 mm65 mm 65 mm
7
65 mm 65 mm
440 mm
550 mm
Mounting holes
3
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
Type A
Types:
A. Akva Lux II TDP-F with FJVR
mounted after heat meter
B. Akva Lux II TDP-F with FJVR
mounted before heat meter
Components
1 Plate heat exchanger DHW
2 Differential pressure controller
3 Thermostat for bypass/circulation
4 PTC2+P controller (Akva Lux II TDP-F)
4 PM2+P controller (Akva Vita II TDP-F)
5 Fitting piece for heat meter
6 Sensor pocket for heat meter
7 Return temperature limiter
8 Zone valve
9 Air vent
10 T-piece (w. plug ½”)
11 Strainer w. plug ½”
12 Fitting piece for cold water meter,
hot water meter
13 Flow regulator
14 Strainer
Please note:
Your substation may look different than the
substation shown, as variants with other
components may be supplied.
Instructions for the fitted components will
always be supplied together with the sta-
tion.
Type B
6
1
2
3
4
5
9
10
11
14
12
13
6
1
2
3
4
5
7
8
9
10
11
12
12
12
14
Safety notes
Storage
To avoid injury of persons and damages to the
device, it is absolutely necessary to read and
observe these instructions carefully.
Necessary assembly, start-up and maintenance
work must be performed by qualified and
authorized personnel only.
Please comply with the instructions of the system
manufacturer or system operator.
Unused connections and shut-off valves must be
sealed with a plug. The plugs must be removed by
an authorized service technician only.
Choice of materials
Choice of materials always in compliance with
local legislation
Warning of high pressure and temperature
The maximum temperature of the flow medium
in the Akva Lux II TDP-F and Akva Vita II TDP-F is
100 °C.
The maximum operating pressure of the substation
is 10 bar.
Be aware of the installation’s permissible system
pressure and temperature.
The risk of persons being injured and equipment
damaged increases considerably if the recom-
mended permissible operating parameters are
exceeded.
We recommend that the substation is equipped
with safety valve, however, always in compliance
with local regulations.
Warning of hot surface
The substation has got hot surfaces, which can
cause skin burns. Please be extremely cautious in
close proximity to the substation.
Warning of electric shock risk
Before cleaning or servicing disconnect power
supplies.
Warning of transport damage
Before substation installation, please make sure
that the substation has not been damaged during
transport.
Sound level
≤ 55 dB
Corrosion protection
All pipes and components are made of stainless
steel and brass.
The maximum chloride compounds of the flow
medium should not be higher than 300 mg/l.
The risk of equipment corrosion increases consi-
derably if the recommended permissible chloride
compounds are exceeded
If the substation is stored before installation, make
sure that the place is dry and heated.
Disposal
This product consists of materials which must not
be disposed of together with domestic waste.
Dismantle the product and sort the components
in various groups before disposal. Observe the
disposal rules of the local legislation..
4
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
Mounting
The substation must be installed and connected by
authorized service personnel only.
Installation must be in compliance with the local
standards and regulations.
Allow for adequate space around the substation for
mounting and maintenance purposes.
Prior to the substation installation all substation
pipes and connections should be cleaned and
rinsed.
The substation should be wall-mounted. The
mounting sheet on the back of the substation has
got holes for screw installation.
A symbol for each of the different connections is
placed on the substation.
Tightening of connections
Due to vibrations during transport all connections
must be checked and tightened before the
substation is installed.
After observing that the substations operates
in accordance with the dimensioning basis, the
connections must be tightened again and the
substation can be taken into continuous use.
Heat meter assembly, fitting piece
The flat station is equipped with a fitting piece for
insertion of a heat meter.
Assembly of heat meter
Loosen nuts from fitting piece, remove fitting
piece and replace with heat meter.
After mounting of heat meter remember to
check all threaded connections and tighten if
necessary.
DCW meter (option)
The substation can be equipped with a fitting
piece for insertion of DCW meter.
Assembly of DCW meter
Please refer to above assembly instructions for
heat meter.
Filling, start-up
Prior to the Akva Lux II TDP-F and Akva Vita II TDP-F
installation all its pipes and connections should be
cleaned and rinsed. After that the strainers should
be cleaned.
Before starting-up, check if:
- pipes are connected according to the circuit
diagram,
- release valves are shut off,
- threaded and flanged connections are
tightened.
Fill the heat exchanger / the system with water:
1) Carefully open ball valves on HE supply,
HE return and DH supply.
2) Finally open the ball valve on DH return.
(Please note that the ball valve are not part of the
delivery).
After that the shut-off valves should be opened
and the operation of the substation must be
observed (e.g. temperatures, pressure, thermal
expansion, leakages). After h
eat-up of the system
it should be vented by means of the air vents on
the substation and on the radiators
.
After that the operation of the substation must
be observed. If the substation operates
in accord-
ance with the designed parameters, it can be
taken into continuous use.
All Danfoss plate heat exchangers and substations
have been pressure tested prior to delivery.
Electrical connection 230 V AC
5
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
District heating substation for direct heating for
single-family, semi-detached and terraced hous-
es as well as flats. With one heating circuit and in-
stantaneous water heater for domestic hot water
heating. Designed for wall mounting.
Description
General PLEASE NOTE that other variants may be supplied.
The control function, however, is basically as de-
scribed below. Please always observe the enclosed
producer instructions for the mounted controller.
Heating circuit
Temperature control
The required room temperature is controlled by
radiator thermostats (fixed setting throughout the
year).
It is recommended that all radiators are opened a
little in each room.
The differential pressure controller reduces the
fluctuating pressure in the district heating net-
work to a small and invariable operating pres
sure
in the substation and thereby ensures the best
possible operating conditions for radiator thermo-
stats, which enables individual control of the room
temperature.
The differential pressure controller is preset from
factory and should not be adjusted afterwards
Differential pressure
controller
Return temperature limiter Return temperature limiters are used to limit the
return temperature of radiators.
The return temperature limiter FJVR is a self-act-
ing P-band regulator, 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 maximum return temperature, in
compliance with the local demands.
Approximate thermostat scale setting:
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.
6
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
Option
Electronic programmable
room thermostat
The Akva Lux II TDP-F flat station can be equipped
with a zone valve, and thereby the substation can
be supplied with an electronic programmable
room thermostat.
In this case temperature is controlled by the room
thermostat and radiator thermostats. Please note
that the room thermostat keeps the temperature
at a constant level in the whole apartment accor-
ding to the set room parameters.
Consult additional maintenance instructions for-
room thermostat for further information. It is re-
commended to avoid fully opened thermostats
on some radiators and fully shut-off on others.
Higher temperature at the top and lower tempe-
rature at the bottom part of radiators means that
the system operation is correct. To keep correct
temperature and friendly microclimate for human
beings in the apartment, it is recommended to en-
sure regular airing in rooms.
Note:
Before mounting of the
electronic room thermo-
stat, an actuator must
be mounted on the zone
valve.
7
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
Description - Akva Lux II TDP-F
The domestic hot water is prepared in the heat ex-
changer based on the flow principle and the tem-
perature is controlled by the combined hydraulic
and thermostatic self-acting controller PTC2+P
with integrated differential pressure controller (1).
Description - Akva Vita II TDP-F
The domestic hot water is prepared in the heat
exchanger based on the flow principle and the
temperature is controlled by the hydraulic self-act-
ing controller PM2+P with integrated differential
pressure controller (2).
PTC2+P controller for domestic hot water (1).
The DHW temperature setting is adjusted with
the handle for temperature setting, by turning the
handle in “+” direction (warmer), or “-” direction
(colder). The temperature should be set to 45-50 °C
at normal use (7-8 l/min.) The temperature should
never exceed 55 °C to avoid lime scale precipita-
tion in the heat exchanger.
PM2+P controller for domestic hot water (2).
The DHW temperature setting is adjusted with the
handle in “red” direction (warmer), or in “blue” di-
rection (colder). The temperature should be set to
45-50 °C at normal use (7-8 l/min.) The tempera-
ture should never exceed 55 °C to avoid lime scale
precipitation in the heat exchanger.
FJVR thermostat for bypass
As a standard the substation is equipped with
a bypass thermostat, Danfoss FJVR with return
temperature limiter 10/50 C° , which ensures that
hot water is available immediately, 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.
Circulation thermostat
Switching to DHW circulation control is possible
from a constructional point of view, requiring only
an additional circulation set. The components for
DHW circulation are not part of the delivery and
must be ordered separately and mounted on site.
If the substation is connected to the DHW circulation
system in the building, the FJVR thermostat (3) will
function as a circulation thermostat and control
the circulation water temperature, independently
of the set DHW temperature. It is recommended to
set the thermostat in pos 3.
For DHW circulation control 3 circulation sets are
available as optional equipment:
The 3 circulation sets and control change pos-
sibilities from bypass to DHW circulation will be
described on the following pages.
Please note that this description applies both to
Akva Lux II TDP-F and Akva Vita II TDP-F.
Approximate scale setting
Pos. 2 = 30°C
3 = 40°C
4 = 45°C
Domestic hot water
DHW temperature control
Bypass thermostat (standard)
DHW circulation
Control change from bypass to
circulation
Handle for temperature setting
1
2
3
Handle for temperature setting
8
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
3 + 6
3 + 4
A
C
B
Connection of capillary
tube by means of
union nut +
cutting ring
• Demountplugs in pos. A and B (6 mm Allen
key).
• Mount3/8”x3/4”hexagonnipple,3/4Ø21,4
mm union nut and ½” x 28,5 mm hexagon
nipple in pos. A (pack) (for mounting of circula-
tion pipe (not part of the delivery)).
• Mount1/4”x6mmhexagonnippleinpos.B
(pack).
• Demountcapillarytubeandunionnutinpos.
C and D (scrap).
• Plugtheholeinpos.Cwithunionnut+ball
plug in pos. C.
• Demount3/4”pluginpos.E
• DemountFJVRthermostatin(F).Unscrew3/4”
reducer bushing from FJVR thermostat and
scrap.
• Mount3/4”plug+gasketinpos.(F).
• MountFJVRthermostatinpos.(E).
• Fitnewcapillarytubefrom(D)to(B)bymeans
of union nut and cutting ring.
B
Connection
of capillary
tube for
circulation
Connection of
circulation pipe
F
Union nut + ball plug
Union nut +
cutting ring
F
Control change from bypass to
DHW circulation
Circulation set 1
1) 1 pc. 3/8” x 3/4” hexagon nipple
2) 1 pc. 1/4”x 6 mm hexagon nipple
3) 3 pc. union nut 6 mm
4) 1 pc. ball plug
5)1pc.capillarytubeØ6mm
6) 2 pc. cutting ring
7)1pc.3/4Ø21,4mmunionnut
8) 1 pc. ½” x 28,5 mm hexagon
nipple
(Please note that this circulation set
is prepared for application in other
substation types too. - Therefore
excess components may occur and
we ask you please to ignore these).
Remember circulation pump and non-
return valve assembly (this is not part of
the delivery and must be fitted remotely
on site).
The pump must pump water in direction
towards the substation.
D
E
D
2
3 + 6
7 + 8
9
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
10
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
• Demountplugs in pos. A and B (6 mm Allen
key).
• Mount3/8”x3/4”hexagonnippleinpos.A
(pack) and mount circulation pipe in hexagon
nipple.
(Please note that the width of the station will
increase by 120 mm).
• Mount1/4”x6mmhexagonnippleinpos.B
(pack).
• Demountcapillarytubeandunionnutinpos.
C and D (scrap).
• Plugtheholeinpos.Cwithunionnut+ball.
• Demount3/4”pluginpos.E.
• DemountFJVRthermostatin(F).Unscrew3/4”
reducer bushing from FJVR thermostat and
scrap.
• Mount3/4”plug+gasketinpos.(F).
• MountFJVRthermostatinpos.(E).
• Fitnewcapillarytubefrom(D)to(B)bymeans
of union nut and cutting ring.
Control change from bypass to
DHW circulation
Circulation set 2
1) 1 pc. 3/8” x 3/4” hexagon nipple
2) 1 pc. 1/4”x 6 mm hexagon nipple
3) 3 pc. union nut 6 mm
4) 1 pc. ball plug
5)1pc.capillarytubeØ6mm
6) 2 pc. cutting ring
7) 1 pc. hexagon nipple ½” x ½”
8) 1 pc.circulation pipe ø15 mm
(Please note that this circulation set
is prepared for multiple applica-
tions. - Therefore excess compo-
nents may occur and we ask you
please to disregard these).
Remember circulation pump and non-
return valve assembly (this is not part of
the delivery and must be fitted remotely
on site).
The pump must pump water in direction
towards the substation.
3 +6
3 + 4
1
A
C
B
Connection of capillary
tube by means of union
nut + cutting ring
B
Connection
of capillary
tube for
circulation
Connection of
circulation pipe
F
Union nut + ball plug
Union nut +
cutting ring
F
D
E
D
3 + 6
2
7 +8
4 + 5
11
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
1
• Demountplugs in pos. A and B (6 mm Allen
key).
• Mount3/8”x3/4”hexagonnippleinpos.A
(pack) and mount circulation pipe in hexagon
nipple.
(Please note that the width of the station will
increase by 120 mm).
• Mount1/4”x6mmhexagonnippleinpos.B
(pack).
• Demountcapillarytubeandunionnutinpos.
C and D (scrap).
• Plugtheholeinpos.Cwithunionnut+ball.
• Demount3/4”pluginpos.E.
• DemountFJVRthermostatin(F).Unscrew3/4”
reducer bushing from FJVR thermostat and
scrap.
• Mount3/4”plug+gasketinpos.(F).
• MountFJVRthermostatinpos.(E).
• Fitnewcapillarytubefrom(D)to(B)bymeans
of union nut and cutting ring.
Control change from bypass to
DHW circulation
Circulation set 3
1) 1 pc. 3/8” x 3/4” hexagon nipple
2) 1 pc. 1/4”x 6 mm hexagon nipple
3) 3 pc. union nut 6 mm
4) 1 pc. ball plug
5)1pc.capillarytubeØ6mm
6) 2 pc. cutting ring
7) 1 pc. hexagon nipple ½” x ½”
8) 1 pc.circulation pipe ø15 mm
9) 1 pc. pump Wilo Star-Z 15
10) 1 pc. non-return valve
(Please note that this circulation set
is prepared for multiple applica-
tions. - Therefore excess compo-
nents may occur and we ask you
please to disregard these)
Remember circulation pump and non-
return valve assembly (this is not part of
the delivery and must be fitted remotely
on site).
The pump must pump water in direction
towards the substation.
3 + 6
A
C
B
Connection of capillary
tube by means of union
nut + cutting ring
B
Connection of
capillary tube
for circulation
Connection of
circulation pipe
F
Union nut + ball plug
Union nut +
cutting ring
F
D
E
D
3 + 6
2
8 + 9 + 10
The bypass thermostat FJVR can be mounted be-
fore the heat meter
This applies to Akva Lux II TDP-F / Akva Vita II TDP-F,
type B and for these types the control change
from bypass to DHW circulation must be done as
follows, by means of the previously described cir-
culation sets 1, 2 and 3:
• Demountplugsinpos.A und B (6 mm Allen
key).
• Mount3/8”x3/4”hexagonnippleinpos.A
(pack) and mount circulation pipe in the
hexagon nipple..
• Mount1/4”x6mmhexagonnippleinpos.B
(pack).
• Demountcapillarytubeandunionnutinpos.
C and D (scrap).
• Plugtheholeinpos.Cwithunionnut+ball
plug.
• Fitnewcapillarytubefrompos.Dtopos.Bby
means of a union nut and cutting ring.
Control change from bypass to
DHW circulation
(Please note that this circulation set
is prepared for multiple applica-
tions. - Therefore excess compo-
nents may occur and we ask you
please to disregard these)
Remember circulation pump and non-
return valve assembly (this is not part of
the delivery and must be fitted remotely
on site).
The pump must pump water in direction
towards the substation.
Connection
of circulation
pipe
Connection of
capillary tube for
circulation
6 mm
C
D
B
A
E
12
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
Circulation pump Pump start-up
Do not start up the pump until the system has been
filled with the flow media. The pump vents itself au-
tomatically after a short operational period. Short-
term dry-running will not harm the pump.
For more information about the pump please refer
to enclosed installation and maintenance instruc-
tions:
WILO-STAR-Z 15
Installation and Maintenance Instructions.
D Einbau- und Betriebsanleitung
GB Installation and operating instructions
F Notice de montage et de mise en service
NL Inbouw- en bedieningsvoorschriften
E
Instrucciones de instalación y funcionamiento
I Istruzioni di montaggio, uso e
manutenzione
GR Οδηγίες εγκατάστασης και λειτουργίας
S Monterings- och skötselanvisning
FIN Asennus- ja käyttöohje
DK Monterings- och skötselanvisning
H Beépítési és üzemeltetési utasítás
PL Ins trukcja montażu i obsługi
CZ Návod k montáži a obsluze
RUS Инструкция по монтажу и
эксплуатации
LV Instalēšanas un ekspluatācijas instrukcijas
SK Návod na montáž a obsluhu
Wilo-Star-Z 15
4 106 234-Ed.02 / 2008-02-Wilo
PN 10
PN 30
I-230 V
50 Hz
22 W
Imax 0,25mA
Flow regulator A flow regulator is a control device, which, ir-
respectively of mains pressure, maintains the
designated flow rate. This means that the flow
regulator automatically equalizes all changes in
pressure within a large pressure range (normally
1 to 10 bar), and thereby ensures a constant.
flow regardless of water supply pressure.
Even at low pressures the required flow is ob-
tained. At high pressures no unnecesssary water
is wasted.; in fact much water and energy can be
saved by using flow regulators.
13
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
14
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
Troubleshooting
Heating
Problem Possible cause Solution
No heat
Strainer clogged on DH or HE
side (radiator circuit)
Filter in district heating meter
clogged
Defective or wrongly set diffe-
rential pressure controller
Defective room thermostat/
actuator
Motor valve defective - or pos-
sibly dirt in the valve housing
Automatic controls wrongly set
or defective - possibly power
failure
Air pockets in the system
Clean strainer.
Clean the filter (after consult-
ing the district heating plant).
Check the functioning of the
differential pressure controller
- clean valve seat if required.
Check the functioning of the
room thermostat / actuator.
Check the functioning of valve
- clean valve seat if required.
Check if the setting of the con-
troller is correct - see separate
instructions. Check the power
supply.
Vent the installation thorough-
ly.
Uneven heat distribution Air pockets in the system
Vent the installation thorough-
ly
Supply temperature too high
Wrong setting of automatic
controls
Defective controller. The
controller does not react as it
should in accordance with the
instructions
Adjust automatic controls,
see instructions for automatic
controls.
Call in automatic controls
manufacturer or replace
controller.
Supply temperature too low
Wrong setting of automatic
controls
Defective controller. The
controller does not react as it
should in accordance with the
instructions
Strainer clogged
Adjust automatic controls,
see instructions for automatic
controls.
Call in automatic controls
manufacturer or replace
controller.
Clean strainer
If operating disturbances occur, the following
basic features should be checked before carrying
out actual troubleshooting:
- the substation is connected to electricity (ap-
plies only to substations with room thermostat)
- the strainer on the district heating supply is
clean,
- the district heating flow 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 pressure in the
district heating network. - if in doubt, ask the
district heating plant,
- there is pressure on the system.
15
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
Problem Possible cause Solution
Unzureichende Kühlung
Too small heating surface/too
small radiators compared to
the total heating requirement
of the building.
Poor utilization of existing
heating surface.
The system is single-pipe.
Increase heating surface
Make sure the heat is
distributed evenly across the
full heating surface – open
all radiators and keep the
radiators in the system from
heating up at the bottom.
Higher temperature at the
top and lower temperature at
the bottom part of radiators
means that the system
operation is correct.
It is extremely important to
keep the supply temperature
to the radiators as low as ever
possible, while maintaining a
reasonable level of comfort.
Troubleshooting
Heating
16
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
Troubleshooting
Domestic hot water
PM 2 + P controller
PTC2 + P controller
Problem Possible cause Solution
In general: Does the controller
work incorrectly
If the quantity of tap water
is normal (temperature
unimportant), it indicates that
the controller works correctly.
Locate defect in another part of
the installation
(see below).
In general: Are the operating
conditions satisfactory?
The substation requires a
DH supply temperature
of minimum 60 °C and a
differential pressure during
operation according to the
information stated in the
product sheet
Contact district heating sup-
plier.
DHW tap load too low;
Tap temperature too low;
Tap temperature fluctuates
- Strainer in DH supply
clogged.
- Defective non-return valve in
thermostatic battery (DHW
tap temperature lower than
DHW from unit).
- Defective non-return valve in
hot water circulation (circula-
tion return pipe is getting
cold during tapping of hot
water).
- Lime scale precipitation in
plate heat exchanger for DHW
(Δt primary too low during
DHW tapping).
- DCW flow too high (big nomi-
nal diameter of pipe, high
DCW pressure), in total max.
16-17 litres per minute.
Clean strainer.
Clean or replace non-return
valve.
Clean or replace non-return
valve
Replace the plate heat
exchanger.
DCW reduction.
DH return water temperature
too high while on standby;
The plate heat exchanger is
cold…
The bypass thermostat is
defective or wrongly adjusted.
Replace or adjust bypass ther-
mostat correctly.
DH return water temperature
too high while on standby;
The plate heat exchanger is
hot…
Short-circuiting of plate heat
exchanger or defective control-
ler.
Replace plate heat exchanger or
controller.
DH return temperature too
high during hot water tapping.
Lime scale precipitation in the
plate heat exchanger for DHW.
Replace the plate heat
exchanger.
17
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
The substation requires little monitoring, apart
from routine checks and cleaning of strainers. To
ensure the best operating conditions regular in-
spection of the substation and a check of all re-
levant operating parameters are recommended,
for example in connection with meter reading.
Meter reading
We recommend that you read your meter regu-
larly and that you write down the meter read.
Cooling / Return temperature reading
The cooling, i.e. the temperature difference be-
tween district heating supply and district heating
return is of great importance for the total heat
economy. It is therefore very important to observe
the supply and return temperatures. Normal tem-
perature difference is 30-35 °C
Cleaning
All strainers should be checked and cleaned at
least once every year, typically in connection with
start-up of the heating system.
Tightening of connections
All threaded and flanged connections should be
checked and tightened in connection with meter
reading. All threaded and flanged connections
should be tightened regularly and especially in
connection with start-up after the summer pe-
riod.
Venting of system
Always vent the radiators and the substation be-
fore the heating season by means of the air vents
on the substation and on the radiators.
Safety valve
The safety valves’ task is to protect the substation
from pressures exceeding the permissible pressure.
The blow-off pipe of the safety valves must not be
closed. The blow-off pipe outlet should be placed
so that it provides safety relief and it is possible to
observe water dropping from the safety valves.
It is advisable to check the operation of the safety
valves by turning the valve head in the indicated
direction.
Strainer
Strainers should frequently be cleaned from
sediments by authorized personnel, according
to producer’s instructions and dependent on the
substation’s operating conditions.
Maintenance
Meter reading
Cooling
Cleaning
Tightening
Venting
Safety valve
Strainer
Notes:
Instructions Akva Lux II TDP-F / Akva Vita II TDPS-F
VI.GE.R1.02 · Produced by Danfoss Redan A/S · 05.2010
19
VI.GE.R1.02 Produced by Danfoss Redan A/S · 05.2010
DECLARATION OF CONFORMITY
We, the manufacturer
Danfoss Redan A/S
Omega 7, Søften
DK-8382 Hinnerup
Tel.: +45 87438943
Fax: +45 87438944
do hereby declare that the following products:
Danfoss Redan Substations
are in conformity with the following directives and standards:
2006/95/EC, Low Voltage Directive
2004/108/EC, EMC Directive
Applied Standards:
EN 60 335 – 1
EN 55 014
EN 61 000 – 6 – 2
EN 61 000 – 6 – 3
This declaration of conformity is provided that the given instructions are followed and that no
alterations are made by third party.
Place: Date:
Director, Operations:
DK-8382 Hinnerup 30/10 2008
Danfoss Redan A/S
Omega 7, Søften
DK-8382 Hinnerup
Telefon: +45 87438943
Telefax: +45 87438944
redan@danfoss.com
www.redan.danfoss.dk
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VI.GE.R1.02 · Produced by Danfoss Redan A/S · 05.2010
Instructions Akva Lux II TDP-F / Akva Vita II TDP-F
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Danfoss Akva Lux II TDP-F / Akva Vita II TDP-F Operating instructions

Danfoss
Brand
Danfoss
Model
Akva Lux II TDP-F / Akva Vita II TDP-F
Type
Operating instructions
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