Danfoss District Energy
MAKING MODERN LIVING POSSIBLE
Akva Lux II S-F
Instructions for installation and use
2
1.0 Contents
Type 004U8327
Type 004U8325
Type 004U8543
Type 004U8533 Cover for wall-mounting
004U8578
Cover for recess mounting
004U8408
Type 004U8637
Cover for wall-mounting
004U8407
Instructions for installation and use Akva Lux II S-F substations
DKDHR VI.HE.C2.02 Danfoss District Energy
1.0 Contents ............................................................................................................................................................................................................................................... 2
2.0 Product introduction .......................................................................................................................................................................................................................3
2.1 Akva Lux II S-F with thermostatic control of heating circuit - Type 004U8325 ....................................................................................................3
2.2 Akva Lux II S-F with thermostatic control of heating circuit and electrical junction box - Type 004U8327 ............................................. 4
2.3 Akva Lux II S-F with electronic control ECL 110 of heating circuit - Type 004U8533 ........................................................................................5
2.3 Akva Lux II S-F with electronic control ECL 210 of heating circuit - Type 004U8637 ........................................................................................6
2.5 Akva Lux II S-F with thermostatic control of HE circuit (with bypass thermostat mounted after heat meter) - Type 004U8543 ......7
3.0 Dimensional sketches / connections .........................................................................................................................................................................................8
4.0 Enduser instructions, General .......................................................................................................................................................................................................9
5.0 Enduser instructions, initial adjustment/setting .................................................................................................................................................................10
6.0 Installation instructions, Safety and Handling ...................................................................................................................................................................... 11
7.0 Installation instructions, GETTING STARTED .........................................................................................................................................................................12
8.0 Description of Akva Lux II S-F .....................................................................................................................................................................................................13
9.0 Installation instructions, general ...............................................................................................................................................................................................13
10.0 Installation instructions, recirculation connection .............................................................................................................................................................17
10.1 Installation instructions - recirculation connection - Circulation set 1 - 004U8400.......................................................................................18
10.2 Installation instructions - recirculation connection - Circulation set 2 - 004U8401.......................................................................................21
10.3 Installation instructions - recirculation connection - Circulation set 3 - 004U8403.......................................................................................22
10.4 Installation instructions - recirculation connection - Circulation set 4 - 004U8405.......................................................................................24
11.0 Adjustment and commissioning of the Akva Lux II S-F variants ...................................................................................................................................26
12.0 Circulation pump, heating ..........................................................................................................................................................................................................32
13.0 Circulation pump, domestic hot water ..................................................................................................................................................................................33
14.0 Flow regulator ..................................................................................................................................................................................................................................33
15.0 Operation and maintenance ......................................................................................................................................................................................................34
15.1 Maintenance schedule (recommendations) ................................................................................................................................................................35
16.0 Troubleshooting ..............................................................................................................................................................................................................................36
15.1 Troubleshooting - Heating .................................................................................................................................................................................................36
16.2 Troubleshooting - Domestic hot water ..........................................................................................................................................................................37
17.0 EU Declaration of Conformity ....................................................................................................................................................................................................38
18.0 Commissioning Certicate ..........................................................................................................................................................................................................39
33
Danfoss District Energy VI.HE.C2.02 DKDHR
Instructions for installation and use Akva Lux II S-F substations
2.0 Product introduction
2.1 Akva Lux II S-F with thermostatic control of heating circuit - Type 004U8325
2 Plate heat exchanger, DHW
4 Dierential pressure controller
5 Dirt strainer
6 Non-return valve
8 Circulation pump, HE
17 Air vent
23 Sensor pocket for heat meter
24 Fitting piece for heat meter
30 Thermostatic valve FTC
30a Sensor for thermostatic valve (FTC)
38 PTC2+P controller
40 Thermostat for bypass/circulation
52 Zone valve Danfoss RA-C
60 Fitting piece for DCW meter
Please note that the ball valves are not part of the delivery
and must be mounted on site.
Please note:
Your substation may look dierent than the substation shown,
as variants with other components may be supplied.
The control function, however, is basically as stated in this
instruction manual.
Instructions for the tted components will be supplied together
with the substation.
Connections size:
DH, HE, DHW, DCW: G¾” IT
Recirc.: R½” ET
DH
Supply
HE
Supply
HE
Return
DH
Return
DCW
DHW
DCW
Connection for circ
.
Bypass
(Standard)
Room thermostat
(dly. as loose part)
Circ. (option)
Option
17
38
40
24
2
52
23
6
5
4
60
Primary Secondary
Domestic water
DHW DCW HE
Return
HE
Supply
DH
Supply
DH
Return
DCW
5
8
30
23
30a
6
2 Plate heat exchanger, DHW
4 Dierential pressure controller
5 Dirt strainer
6 Non-return valve
8 Circulation pump, HE
17 Air vent
23 Sensor pocket for heat meter ½“
24 Fitting piece for heat meter, ¾” x 110 mm
30 Thermostatic valve FTC
38 PTC2+P controller
40 Danfoss FJVR thermostat for bypass/circulation
52 Zone valve Danfoss RA-C
60 Fitting piece for DCW meter, 3/4” x 80 mm
----------------------------------------------------------------------------
Options:
7 Ball valve
40A Connection for circulation
52A Thermal actuator Danfoss TWA-A NC
53 Room thermostat Danfoss TP 7000
63 Safety valve set incl. ball valve 60 mm
Circ.
4
DKDHR VI.HE.C2.02 Danfoss District Energy
Instructions for installation and use Akva Lux II S-F substations
2.2 Akva Lux II S-F with thermostatic control of heating circuit and electrical junction box - Type 004U8327
2 Plate heat exchanger DHW
4 Dierential pressure controller
5 Dirt strainer
6 Non-return valve
8 Circulation pump, HE
17 Air vent
23 Sensor pocket for heat meter
24 Fitting piece for heat meter
30 Thermostatic valve FTC
30a Sensor for thermostatic valve (FTC)
38 PTC2+P controller
40 Thermostat for bypass/circulation
52 Zone valve RA-C / thermostatic actuator TWA-A NC
57 Safety thermostat
60 Fitting piece for DCW meter
Please note that the ball valves are not part of the delivery
and must be mounted on site.
Please note:
Your substation may look dierent than the substation shown,
as variants with other components may be supplied.
The control function, however, is basically as stated in this
instruction manual.
Instructions for the tted components will be supplied together
with the substation.
Connections size:
DH, HE, DHW, DCW: G¾” IT
Recirc.: R½” ET
DH
Supply
HE
Supply
HE
Return
DH
Return
DCW
DHW
DCW
Connection for circ
.
Bypass
(Standard)
Room thermostat
(dly. as loose part)
Circ. (option)
Option
2 Plate heat exchanger, DHW
4 Dierential pressure controller
5 Dirt strainer
6 Non-return valve
8 Circulation pump, HE
17 Air vent
23 Sensor pocket for heat meter ½“
24 Fitting piece for heat meter, ¾” x 110 mm
30 Thermostatic valve FTC
38 PTC2+P controller
40 Danfoss FJVR thermostat for bypass/circulation
52 Zone valve Danfoss RA-C / actuator TWA-A
57 Safety thermostat
60 Fitting piece for DCW meter, 3/4” x 80 mm
-----------------------------------------------------------------------------
Options:
7 Ball valve
40A Connection for circulation
53 Room thermostat Danfoss TP 7000
63 Safety valve set incl. ball valve 60 mm
Circ.
17
38
40
24
2
52
23
6
5
4
60
Primary SecondaryDomestic water
DHW DCW HE
Return
HE
Supply
DH
Supply
DH
Return
DCW
5
8
30
23
30a
6
57
El box
55
Danfoss District Energy VI.HE.C2.02 DKDHR
Instructions for installation and use Akva Lux II S-F substations
2.3 Akva Lux II S-F with electronic control ECL 110 of heating circuit - Type 004U8533
2 Plate heat exchanger DHW
4 Dierential pressure controller
5 Dirt strainer
6 Non-return valve
8 Circulation pump, HE
17 Air vent
23 Sensor pocket for heat meter
24 Fitting piece for heat meter
25 Electronic controller
29 Actuator AMV 13 or AMV 150
30 2-way valve VS2
38 PTC2+P controller
40 Thermostat for bypass/circulation
57 Safety thermostat (option, to be mounted on site)
60 Fitting piece for DCW
Please note that the ball valves are not part of the delivery
and must be mounted on site.
Please note:
Your substation may look dierent than the substation shown,
as variants with other components may be supplied.
The control function, however, is basically as stated in this
instruction manual.
Instructions for the tted components will be supplied together
with the substation.
Connections size:
DH, HE, DHW, DCW: G¾” IT
Recirc.: R½” ET
DH
Supply
HE
Supply
HE
Return
DH
Return
DCW
DHW
DCW
Connection for circ
.
Bypass
(Standard)
Circ. (option)
Option: Before heat meter
2 Plate heat exchanger, DHW
4 Dierential pressure controller
5 Dirt strainer
6 Non-return valve
8 Circulation pump, HE
17 Air vent
23 Sensor pocket for heat meter ½“
24 Fitting piece for heat meter, ¾” x 110 mm
25 Controller Danfoss ECL 110
26 Outdoor sensor Danfoss ESMT
27 Sensor Danfoss ESMC
29 Danfoss actuator AMV13
30 2-way valve VS2
38 PTC2+P controller
40 Danfoss FJVR thermostat for bypass/circulation
60 Fitting piece for DCW meter, DHW meter, ¾” x 80
-------------------------------------------------------------------------------
Options:
7 Ball valve
40A Connection for circulation
57 Safety thermostat
63 Safety valve set
Circ.
17
38
40
24
2
23
4
60
5
30
Primary Secondary
Domestic water
DHW DCW
HE
Return
HE
Supply
DH
Supply
DH
Return
DCW
8
29
6
25
5
57
This picture shows Akva Lux II S-F with AMV 150
6
DKDHR VI.HE.C2.02 Danfoss District Energy
Instructions for installation and use Akva Lux II S-F substations
2.3 Akva Lux II S-F with electronic control ECL 210 of heating circuit - Type 004U8637
2 Plate heat exchanger DHW
4 Dierential pressure controller
5 Dirt strainer
6 Non-return valve
8 Circulation pump, HE, Alpha2 L
17 Air vent
23 Sensor pocket for heat meter
24 Fitting piece for heat meter
25 Electronic controller
29 Actuator AMV 150 or AMV 13
30 2-way valve VS2
38 PTC2+P controller
40 Thermostat for bypass/circulation
60 Fitting piece for DCW
Please note that Akva Lux II S-F, type 004U8637 is available
as mount-on wall variant only and can not be mounted in
a recess box.
Please note:
Your substation may look dierent than the substation shown,
as variants with other components may be supplied.
The control function, however, is basically as stated in this
instruction manual.
Instructions for the tted components will be supplied together
with the substation.
Connections size:
DH, HE, DHW, DCW: G¾” IT
Recirc.: R½” ET
DH
Supply
HE
Supply
HE
Return
DH
Return
DCW
DHW
DCW
Connection for circ.
Bypass
(Standard)
Circ. (option)
2 Plate heat exchanger, DHW
4 Dierential pressure controller
5 Dirt strainer
6 Non-return valve
7 Ball valve
8 Circulation pump, HE
12 Safety valve
13 Thermometer
17 Air vent
23 Sensor pocket for heat meter ½“
24 Fitting piece for heat meter, ¾” x 110 mm
25 Controller Danfoss ECL 210/A237
26 Outdoor sensor Danfoss ESMT
27 Sensor Danfoss ESMC
29 Danfoss actuator AMV150 or AMV 13
30 2-way valve VS2
38 PTC2+P controller
40 Danfoss FJVR thermostat for bypass/circulation
57 Safety thermostat
60 Fitting piece for DCW meter, DHW meter, ¾” x 80
Circ.
17
38
40
24
2
23
4
60
5
30
Primary Secondary
Domestic water
DHW DCW
HE
Return
HE
Supply
DH
Supply
DH
Return
DCW
8
29
6
25
5
This picture shows Akva Lux II S-F with AMV 13
77
Danfoss District Energy VI.HE.C2.02 DKDHR
Instructions for installation and use Akva Lux II S-F substations
2.5 Akva Lux II S-F with thermostatic control of HE circuit (with bypass thermostat mounted after heat meter) - Type 004U8543
2 Plate heat exchanger DHW
4 Dierential pressure controller
5 Dirt strainer
5A Dirt strainer with plug
6 Non-return valve
8 Circulation pump, HE
17 Air vent
23 Sensor pocket for heat meter
24 Fitting piece for heat meter
29 Thermostatic actuator TWA-A NC
30 2-way body valve RAC / Thermostatic valve FTC
30a Sensor for thermostatic valve (FTC)
38 PTC2+P controller
40 Thermostat for bypass/circulation
47 Flow limiter
52 Zone valve Danfoss RA-C15
54 T-piece with plug
57 Safety thermostat
59 Fitting piece for DCW, DHW meter
Please note that the ball valves are not part of the delivery
and must be mounted on site.
Please note:
Your substation may look dierent than the substation shown, as
variants with other components may be supplied.
The control function, however, is basically as stated in this
instruction manual.
Instructions for the tted components will be supplied together
with the substation.
Connections size:
DH, HE, DHW, DCW: G¾” IT
Recirc.: R½” ET
DH
Supply
HE
Supply
HE
Return
DH
Return
DCW
DHW
DCW
Bypass
(Standard)
2 Plate heat exchanger, DHW
4 Dierential pressure controller
5 Dirt strainer
5A Dirt strainer with plug ½”
6 Non-return valve
8 Circulation pump, HE
17 Air vent
23 Sensor pocket for heat meter ½“
24 Fitting piece for heat meter, ¾” x 110 mm
29 Thermal actuator TWA-A NC
30 2-way body valve RAC + Thermostatic valve FTC
38 PTC2+P controller
40 Danfoss FJVR thermostat for bypass/circulation
47 Flow limiter
52 Zone valve RA-C15
54 T-piece (w. ½” plug)
57 Safety thermostat
59 Fitting piece for DCW meter, DHW meter, ¾” x 80
----------------------------------------------------
Options:
7 Ball valve
40A Connection for circulation
63 Safety valve set
17
38
40
24
2
23
54
5A
4
59
5
30
59
47
59
Primary SecondaryDomestic water
DHW DCW
HE
Return
HE
Supply
DH
Supply
DH
Return
DCW
8
30A
29
52
57
6
6
230 V
(from room thermostat)
Connection for circ.
8
DKDHR VI.HE.C2.02 Danfoss District Energy
Instructions for installation and use Akva Lux II S-F substations
40
50
440
24
25 65 65 65 65 65 65 25
25 115
551
44
21
175
Danfoss Standard
A3
1:5
Material
SizeScale
Projection
Danfoss Redan A/S
Approval
JJ
24-11-2011
Design
Replace
Akva Lux II S_F
Designation
1 / 1
Sheet
Rev.
A85172051
No.
Confidential: Property of Danfoss Redan A/S, Nordborg, Denmark.
Not to be handed over to, copied or used by third party. Two- or three
dimensional reproduction of contents to be authorized by Danfoss Redan A/S.
F
E
D
C
B
A
F
E
D
C
B
A
8
7
6
5
4
32
1
87
6
5
4
3
2
1
933185,147 kg
Weight
General tolerance accuracy
ISO 2768 - mK
21 3 4 5 6 7
Keyholes for mounting
3.0 Dimensional sketches / connections
Connections:
1 Domestic cold water (DCW)
2 Domestic hot water (DHW)
3 Domestic cold water (DCW)
4 District heating (DH) supply
5 District heating (DH) return
6 Heating (HE) supply
7 Heating (HE) return
21 3 4 5 6 7
Keyholes for mounting
Akva Lux II S-F with thermostatic control of heating circuit, wall mounted
21 3 4 5 6 7
Keyholes for mounting
Akva Lux II S-F with electronic control ECL 110 of heating circuit , wall mounted
Akva Lux II S-F with thermostatic control of heating circuit, recess mounted
40
50
440 45
25 65 65 65 65 65 65 25
24
25
44
551 21
150
POS.
Qty.
PART NUMBER
Description
1 5 113206
Popnitte Ø4.8x10 Alu
2 1 125037
Tee 3/4"M x 3/4"N x M14x1
3 2 125123
4 1 125140
Vinkel DN20 3/4" x 3/4
5 1 125141
6 1 130107
7 1 133021_kap01
8 1 133051
9 1 152124
10 1 155254_kap02
11 1 300125
12 1 302222
13 1
305431_01
14 1 326062
15 1 326158
16 1 371163
17 1 530019
Rør Ø18
18 1 822395
19 1 12510404
20 1
125290-pr
21 1 125301
22 1 125304
23 1 125309
24 1 125310
25 2 125314
26 2 125315
27 2 127028
28 2 132120
29 1 133006
30 1
133021_1
31 1
133021_2
32 2 135120
33 1 138041
Udluftning drejelig
34 1 141186
35 31 145056
Pakning 3/4" udst. 24x17,5x3 m EPDM
282
36 2 145057
Pakning 1" 30x21,5x3 EPDM 282
37 1 152160
38 1
155254_1
TD-reg AVPL 15 N/N kvs=1,6
39 1 161087
40 4 171020
41 1 316004
Passtk. 3/4" x 80
42 2 326028
Spidsmuffe 3/4" x 1"
43 2 326069
44 1 329057
Brystnippel 3/4" L=32
45 1 329100
46 1 329133
Monteringsbøsning 2x 3/4" Oml.
47 1 361003
48 2 1320351
49 1
440218-test
Bagplade TDP-F
50 1 530017
Ø18
51 1 530046
52 1 828102
53 1 830003
54 1 905023
55 1
905023_føler
56 1 905023_kap02
Akva Lux II S-F
57 1 933301
58 1 5211292
59 1 8211317
Rør Ø18
60 1 8300031
Rør Ø18
61 1
E120004203
XB06H-1, 26 pl
Danfoss Standard
A3
1:5
Material
SizeScale
Projection
Danfoss Redan A/S
Approval
JJ
24-11-2011
Design
Replace
Designation
1 / 1
Sheet
Rev.
A15172042
No.
Confidential: Property of Danfoss Redan A/S, Nordborg, Denmark.
Not to be handed over to, copied or used by third party. Two- or three
dimensional reproduction of contents to be authorized by Danfoss Redan A/S.
F
E
D
C
B
A
F
E
D
C
B
A
8
7
6
5
4
32
1
87
6
5
4
3
2
1
933185,147 kg
Weight
General tolerance accuracy
ISO 2768 - mK
21 3 4 5 6 7
Keyholes for mounting
Akva Lux II S-F with thermostatic control of heating circuit and junction box, wall mounted
Akva Lux II S-F with electronic control ECL 210 of heating circuit, wall mounted
Keyholes for mounting
21 3 4 5 6 7
190 with AMV 13
with AMV 150
99
Danfoss District Energy VI.HE.C2.02 DKDHR
Instructions for installation and use Akva Lux II S-F substations
4.0 Enduser instructions, General
Instructions
Please read these instructions carefully.
The manufacturer accepts no liability for loss or damage resulting
from failure to comply with these instructions. Read and follow these
instructions carefully to prevent the risk of physical injury and/or
damage to property. Exceeding the recommended operating pa-
rameters appreciably increases the risk of personal injury and/or
damage to property.
Installation, commissioning and maintenance must be carried out
by qualied and authorised personnel (both plumbing and electri-
cal work).
Once the station has been installed and is operating, there is nor-
mally no need to alter the settings or other functions. The district
heating substation is very reliable and easy to operate.
If necessary, you can change the temperature settings as described
on page 10. For more detailed information about the substation,
see the sections concerning installation and commissioning.
Description
These instructions apply to substation types Akva Lux II S-F, which are
district heating substations for direct heating for single-family, semi-
detached and terraced houses as well as ats. With one heating circuit
and instantaneous water heater for domestic hot water heating.
With mixing loop, which provides a suitable temperature level e.g.
for oor heating (protects the heating circuit against too high tem-
peratures) and ensures that return water is cooled to the required
temperature before it ows back to the DH plant.
Akva Lux II S-F substations are tted with a dierential pressure
controller that maintains a constant pressure in the heating circuit.
The supply temperature to the heating circuit is regulated using a
thermostat or an automatic controller. Akva Lux S-F substations are
also tted with a pump.
In rooms with oor heating, the temperature is regulated using the
oor heating thermostat for the room in question. In rooms with
radiators, the temperature is regulated using the radiator thermostats.
Alternatively, the heating circuits can be regulated using fully auto-
matic Danfoss ECL weather compensation equipment.
The Akva Lux II S-F variants are designed for wall mounting and are
available as built-in variant with a recess box or as wall-mounted
variant.Please note that type 004U8637 is available as mount-on
wall variant only and can not be mounted in a recess box.
The Akva Lux II S-F, Types 004U8325, 004U8327, 004U8533 and
004U8637 are supplied with bypass thermostat mounted before
heat meter (bypass consumption is registered by the heat meter).
Akva Lux II S-F, type 004U8543 is supplied with bypass thermostat
mounted after heat meter (bypass consumption is not registered
by the heat meter).
Akva Lux II S-F, types 004U8327, 004U8533 and 004U8637 are wired
and tested in the factory. For type 004U8327 internal electrical com-
ponents are prewired into an electrical terminal box.
We recommend regular inspections of the substation - ideally in
connection with readings of the district heating meter.
Pay special attention to any leaks and an excessively high return
temperature in the district heating circuit (poor cooling of the district
heating water). Cooling – i.e. the dierence between the supply and
return temperature of the district heating water – has a signicant ef-
fect on the overall economy. Therefore, it is important to focus on the
supply and return temperature in the heating system.
Warning! Hot surfaces
Parts of the substation may be very hot and can cause burn in-
juries. Be very careful when you are in the immediate vicinity of
the unit.
Warnings about high pressure and high temperature
The maximum supply temperature in the district heating net-
work can be up to 90°C and the operating pressure can be up
to 10 bar. This may result in a risk of scalding from touching the
substation and from outow of the medium (water/steam). Ex-
ceeding the substation design data and operating parameters for
pressure and temperature carries an appreciable risk of personal
injury and/or damage to property.
Emergencies
In the event of re, leaks or other hazards, immediately shut o
all sources of energy to the substation, if possible, and call for
appropriate assistance.
If the domestic hot water is discoloured or malodorous, shut o
all ball valves on the substation notify all users and call for profes-
sional assistance without delay.
The dierence should typically be 30–35°C in systems that operate
with radiators. In systems that feature oor heating, the dierence
is typically 5–10°C. In these systems, it is important that the supply
temperature does not exceed 35°C.
Please note that a low district heating return temperature is directly
dependent on the return temperature from the heating/oor heating
circuit and the return temperature of the domestic hot water recircula-
tion (in systems with domestic hot water recirculation). It is therefore
important to focus on these return temperatures.
Cooling from the water heater alone:
During tapping, the level of cooling will typically be 30–35°C. When
domestic hot water is not being tapped, it is completely normal for the
return temperature from the water heater to rise slightly. In this situa-
tion, the district heating meter will register very modest consumption
as the volume of water is very small.
Irregularities
When reading the meters, check all joints and connections for leaks.
If you identify any irregularities/leaks, contact your professional
provider for assistance.
Check the troubleshooting section before contacting your
professional provider.
10
DKDHR VI.HE.C2.02 Danfoss District Energy
Instructions for installation and use Akva Lux II S-F substations
5.0 Enduser instructions, initial adjustment/setting
Domestic hot water control
Danfoss PTC2+P controller (Fig. 1) for domestic hot water. 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
ow (7–8 litres per min.). The temperature should never exceed 55°C
to prevent limescale deposits building up in the water heater.
Bypass or circulation thermostat
Thermostat (Fig. 2) that keeps the branch pipe warm in the summer or
regulates the circulation temperature if domestic hot water recircula-
tion has been established in the hot water system.
The thermostat should initially be set to position 3.
Heating circuit, Dierential Pressure Controller
The dierential pressure controller (Fig. 3) reduces the high, uctu-
ating pressure in the district heating network to a constant operat-
ing pressure. The dierential pressure controller is initially set by the
plumber in connection with the commissioning of the substation. If
disruptions to the operation occur: noise in the radiator thermostats
or poor regulation capacity, it may be necessary to reset the dieren-
tial pressure controller to a lower or higher operating pressure. We
suggest that you contact your local plumber for assistance.
Heating circuit, Temperature control
Thermostatic control
The supply temperature to the heating circuit can be set by adjusting
the thermostat FTC (Fig. 4), which in combination with a 2-way valve
type RA-C controls the temperature for the heating circuit.
The thermostat will be set by the installer in connection with the
commissioning, but it may be necessary to adjust it subsequently
depending on the outdoor temperature.
Temperature range: 15-50 °C or 35-70 °C
The setting values may vary depending on the operating conditions.
It is important to set the supply temperature to the radiators as low
as possible. Use the radiator thermostats to regulate the room tem-
perature.
NB! For houses that are heated exclusively with oor heating.
The supply temperature should typically be set to approx. 30–35°C,
which corresponds to pos. 2–2.5 on the thermostat (guiding value).
The supply temperature must never exceed 40°C. (In addition, AL-
WAYS refer to the instructions from the oor supplier)
Electronic control
Alternatively the temperature for the heating circuit can be controlled
electronically by a Danfoss ECL 110 or 210 controller (Fig. 5). The
supply temperature ist calculated by the controller on basis of the
outdoor temperature. See the enclosed documentation for same.
See the enclosed documentation for same.
Pump.
Akva Lux II S-F substations are factory tted with a pump (Fig. 6). The
pump setting is established in connection with the commissioning.
Generally speaking, this setting is not to be altered. If it should nev-
ertheless be necessary to change the pump setting, see the section
concerning pumps in the installation and commissioning sections
regarding the individual products.
In the summer, you can switch o the power to the pump at the mains
if you want to save electricity by not heating your home.
Start-up and venting – see the installation and commissioning sec-
tions, if necessary.
Fig. 1
Fig. 2
Fig. 3
TD200AVPL
Fig. 4
Fig. 5
Fig. 6
ECL 210ECL 110
Alpha 2L 15-60Wilo Smart 15/6
1111
Danfoss District Energy VI.HE.C2.02 DKDHR
Instructions for installation and use Akva Lux II S-F substations
6.0 Installation instructions, Safety and Handling
Instructions
Please read these instructions carefully before installing and comis-
sioning this substation. The manufacturer accepts no liability for loss or
damage resulting from failure to comply with these instructions for use.
Read and follow these instructions carefully to prevent the risk of physi-
cal injury and/or damage to peroperty. Exceeding the recommended
operating parameters considerably increases the risk of personal injury
and/or damage to property.
Installation, commissioning and maintenance must be carried out by
qualied and authorized personnel in compliance with the local safety
regulations.
Once the station has been installed and is operating, there is normally
no need to alter the settings or other functions. The district heating
substation is very reliable and easy to operate.
Energy source
The substation is primarily designed for connection to district heating.
Alternative energy sources can be used if the operating conditions are
equivalent to district heating at all times.
Application
The substation is designed only to operate with water or a water-glycol
mixture (up to 40%), and other heating media may not be used.
The substation is to be connected to the household piping in a frost-free
room, where the temperature does not exceed 50 °C and the relative
humidity is not higher than 80%. The substation must no be covered,
bricked in or otherwise cut o from access.
Choice of materials
Only use materials, that comply with local regulations.
Corrosion
The maximum chloride compounds of the medium must not be higher
than 300 mg/l. The risk of corrosion increases considerably if the recom-
mended chloride content is exceeded.
Safety valve(s)
Installation of safety valve(s) must always be in compliance with local
regulations.
Noise level.
≤ 55 dB.
Connection
It must be possible to cut o all energy sources to the unit - including
electrical connections - at all times.
Potential equalization/grounding
Potential equalization is an electrical equalizing connection to se-
cure against user contact with dangerous voltage, which may occur
for example between two piping systems. Potential equalization re-
duces corrosion in heat exchangers, water heaters, district heating
substations and plumbing installations. Equalization of potentials
should be eected according to local regulations.
Warning! Hot surfaces
Parts of the substation may be very hot and can cause burn injuries.
Be very careful when you are in the immediate vicinity of the substa-
tion.
Warning of high pressure and high temperature
The maximum supply temperature in the district heating network
can be up to 90°C and the operating pressure can be up to 10 bar.
This may result in a risk of scalding from touching the substation and
from outow of the medium (water/steam). Exceeding the substa-
tion design data and operating parameters for pressure and temper-
ature carries an appreciable risk of personal injury and/or damage
to property.
Emergencies
In the event of re, leaks or other hazards, immediately shut o all
sources of energy to the substation, if possible and call for appropri-
ate assistance. If the domestic hot water is discoloured or malodor-
ous, shut o all ball valves on the substation, notify all users and call
for professional assistance immediately.
Warning of damage during transport
On reception of the substation, and before installing it, check for any
evidence of damage during transport.
The substation must be handled and moved with the greatest care
and attention.
IMPORTANT - Tightening of connections
Before adding water to the system, ALL pipe connections MUST be
retightened, as vibrations during transport may have caused leaks.
Once the substation has been lled and the system has been put
into operation, ALL pipe connections MUST be tightened once more.
(Do not overtighten! - See page 14, Test and Connections)
Storage
Before installation, the units must be stored in a dry, heated (i.e. frost-
free) room.
(Relative humidity max. 80% and storage temperature 5-70 °C).
The units must not be stacked higher than the limit at the factory (max.
8 layers) Units supplied in cardboard packaging must be lifted using the
handles incorporated in the packaging. Units must be placed on pallets
for transport/moving across large distances.
As far as possible, do not lift the substation by the pipes. Lifting by the
pipes may cause leaks. REMEMBER to retighten.
Disposal
Dispose of the packaging in accordance with the local regulations for
disposal of used packaging materials.
The substation is made of materials that cannot be disposed of together
with household waste.
Close all energy sources and disconnect all connection pipes. Disconnect
and dismantle the product for disposal in accordance with the applicable
local regulations for the disposal of the individual components.
Handling
We recommend that you wear suitable safety footwear while
handling and installing the substation.
12
DKDHR VI.HE.C2.02 Danfoss District Energy
Instructions for installation and use Akva Lux II S-F substations
7.0 Installation instructions, GETTING STARTED
Connect the substation to the household piping in accordance with
the labelling at the bottom and/or in accordance with the instruc-
tions in this manual.
If the system features DHW recirculation, a recirculation connec-
tion must be established on the substation. The circulation set
is optional equipment, which must be ordered separately and
mounted on site.
We recommend establishing recirculation BEFORE mounting the
substation on the wall.
For instructions about recirculation connection, see pages 17 -25.
GETTING STARTED is a quick guide and some details in connection with
installation and commissioning may require additional information,
which can be found elsewhere in this instruction manual.
Commissioning:
Please note that the “getting started” quick guide presupposes
that shutt-o possibility is established to and from the substa-
tion. - We recommend mounting of ball valves.
Please note that ball valves are not part of the delivery for most
types of S-F substations and must be ordered separately.
1. If the household piping system features domestic hot water re-
circulation, the substation must be connected to the recircula-
tion system. See pages 17 -25 for further information.
2. The substation is prepared for wall mounting. Mount the sub-
station on a solid wall using two sturdy bolts, screws, expan-
sion bolts or similar.
3. Mount ball valves (not part of the delivery) on the substation
and make sure that they are closed, when connnecting them
to the household piping.
4. Mount the district heating meter (see page 14).
5. IMPORTANT! Tighten all pipe connections, as they may have
loosened during transport and handling.
6. On systems that feature a safety valve, establish a drain con-
nection in compliance with the applicable legislation.
7. Open the ball valve for the HE supply and return ow and ll
the system with water by carefully opening the ball valve for
the district heating supply ow and at the same time venting
the system.
Finally, open the ball valve for the district heating return ow.
8. Check the substation and the household piping thoroughly
for leaks.
9. Pressure test the entire system for leaks in accordance with
the applicable regulations.
10. Connect pump and automatic components, if any, to the elec-
tricity supply, but do not switch on the power.
11. Heat the system and vent the radiator circuit/heating side
thoroughly on the radiators and the air valve, if any.
12. For S-F stations, which include zone valve, remember to re-
move the red split on the position indicator of the zone valve.
13. Now switch on the pump and automatic components, if
any.
14. Finish by adjusting the substation in accordance with this
instruction manuals.
Heating and cooling of the system may cause leaks. There-
fore it may be necessary to retighten the connections in the
period after commissioning.
1313
Type 004U8543
Danfoss District Energy VI.HE.C2.02 DKDHR
Instructions for installation and use Akva Lux II S-F substations
8.0 Description of Akva Lux II S-F
Akva Lux II S-F substations are district heating substations for direct
heating for single-family, semi-detached and terraced houses as well
as ats. With one heating circuit and instantaneous water heater
for domestic hot water heating. With mixing loop, which provides a
suitable temperature level e.g. for oor heating (protects the heat-
ing circuit against too high temperatures) and ensures that return
water is cooled to the required temperature before it ows back to
the DH plant.
The Akva Lux II S-F substations are available in various variants, -
please see photos to the right.
Akva Lux II S-F substations are tted with a dierential pressure con-
troller that maintains a constant pressure in the heating circuit. The
supply temperature to the heating circuit is regulated using a ther-
mostat (types 004U8325, 004U8327 and 004U8543) or an electronic
controller (types 004U8533 and 004U8637). Akva Lux S-F substations
are also tted with a pump.
In rooms with oor heating, the temperature is regulated using the
oor heating thermostat for the room in question. In rooms with
radiators, the temperature is regulated using the radiator thermostats.
Alternatively, the heating circuits can be regulated using fully auto-
matic Danfoss ECL weather compensation equipment.
The Akva Lux II S-F variants are designed for wall mounting and are
available as built-in variants with a recess box or as mount-on-wall
variants. - Please note that type 004U8637 is available as mount-on
wall variant only and can not be mounted in a recess box.
The Akva Lux II S-F, Types 004U8325, 004U8327, 004U8533 and
004U8637 are supplied with bypass thermostat mounted before
heat meter (bypass consumption is registered by the heat meter).
Akva Lux II S-F, type 004U8543 is supplied with bypass thermostat
mounted after heat meter (bypass consumption is not registered
by the heat meter).
Akva Lux II S-F, types 004U8327, 004U8533 and 004U8637 are wired
and tested in the factory. For type 004U8327 internal electrical com-
ponents are prewired into an electrical terminal box.
General information
PLEASE NOTE! Some models may have a slightly dierent appearance, as
variants with other components may be supplied.
Supplier instructions for the tted components will always be supplied together
with the substation.
9.0 Installation instructions, general
The installation, connection and maintenance of the substation must
be performed by qualied and authorised personnel.
Installation must always be performed in accordance with the ap-
plicable legislation and in compliance with these instructions.
The substation must be installed so that it is freely accessible and can
be maintained without unnecessary disruption. Lift the substation
by its mounting plate and secure it to a solid wall using 2 sturdy
bolts, screws or expansion bolts positioned in the two keyholes in
the mounting plate.
Before commissioning, rinse all the pipes in the household piping
system thoroughly to remove any impurities, and check and clean
the dirt strainers in the substation.
Connect the substation to the household piping in accordance with
the labelling at the bottom and/or in accordance with the instruc-
tions in this manual.
*
Type 004U8327
Type 004U8325 Type 004U8533
Type 004U8637
14
DKDHR VI.HE.C2.02 Danfoss District Energy
Instructions for installation and use Akva Lux II S-F substations
Test and connections
Before lling the system with water, retighten all the pipe connections
because vibrations and shocks during transport and handling may
have caused leaks. Once the system has been lled with water, tighten
all the pipe connections once more before performing pressure test
for leaks. After heating of the system, check all the connections and
retighten if necessary.
Please note that the connections feature EPDM rubber gaskets!
Therefore, it is important that you DO NOT OVERTIGHTEN the
union nuts. Over-tightening may result in leaks. Leaks caused by
over-tightening or failure to retighten connections are not covered
by the warranty.
Heat meter, tting piece.
The substation is equipped with xed tting piece size ¾” x 110
mm for tting of heat meter in the district heating return line.
Fitting of heat meter
- Close the ball valves on the district heating and the heating
sides.
- Loosen the union nuts at both ends of the tting piece and
remove it.
- Fit the heat meter, - remember to insert gaskets.
- Mount sensor, - remember to insert gaskets.
- After mounting of heat meter remember to check and tighten
all pipe connections before commissioning the substation.
The heat meter consists of ow meter, two temperature sensors and
a microprocessor calculator for the calculation of energy consump-
tion. On the LCD display of the calculator the energy consumption
can be read.
Mounting of temperature sensors
As standard the heat meter is supplie with temperature sensors for
measuring the supply and return ow temperatures.
The Akva Lux II S-F at station is prepared for mounting of tem-
perature sensors with M10x1 connection (see photo to the right):
The supply ow sensor is mounted in the sensor pocket on DH
supply (pos A.)
- demount M10 plug (Pos. A)
- insert one temperature sensor in the sensor pocket
- tighten temperature sensor union nut
Mount the return ow sensor in the heat meter housing (pos. B).
Cold water meter(s), tting pieces.
The substation is equipped with tting piece(s) for cold water
meter(s).
Fitting of cold water meter(s)
- Close the ball valves on the domestic cold water and the do-
mestic hot water supply.
- Loosen the union nuts at both ends of the tting piece and
remove it.
- Fit the cold water meter, - remember to insert gaskets.
- After mounting of cold water meter remember to check and
tighten all pipe connections before commissioning the cold
water meter(s).
*
A
A
B
1515
Danfoss District Energy VI.HE.C2.02 DKDHR
Instructions for installation and use Akva Lux II S-F substations
Hot water meter(s), tting pieces.
The substation can be equipped with tting piece for hot water
meter.
Fitting of hot water meter
- Close the ball valves on the domestic cold water and the do-
mestic hot water supply.
- Loosen the union nuts at both ends of the tting piece and
remove it.
- Fit the hot water meter, - remember to insert gaskets.
- After mounting of hot water meter remember to check and
tighten all pipe connections before commissioning the hot
water meter.
Safety valve
Always lead the blow-o pipe from the safety valve to a drain in ac-
cordance with applicable legislation.
Electrical connection
The electrical connection of the substation must be performed by a
qualied and authorised electrician in compliance with all applicable
rules and regulations.
The station should be connected to a 230 V AC power supply.
The power supply / connection must be carried out in accordance
with the applicable regulations and instructions.
The station must be connected to an external main switch so that it
can be disconnected during maintenance, cleaning and repairs or
in the event of an emergency.
Mounting of outdoor sensor (only for Akva Lux II S-F substations
ordered with Danfoss ECL)
The outdoor temperature sensor is delivered separately and must be
mounted on site according to the enclosed illustrations.
The outdoor sensor is always to be mounted on the coldest side of
the property (normally the north side of the property).
The sensor must not be exposed to the morning sun, and should not
be mounted above windows, doors, air vents or other heat sources,
and not under balconies and roof eaves.
Mounting height approx. 2.5 m above ground.
Temperature range: -50 to 50° C.
Electrical connections
Two wire non polarized (can be crossed).
Sensor cable: 2 x 0.4 - 1.5 mm².
For ECL 110:
Connect the cable ends to ECL controller in clamps 1 and 2.
For ECL 210:
Connect the cable ends to ECL controller in clamps 29 and 30.
Controller ECL 110/210/310
Supply voltage: 230 V a.c. - 50 Hz
Voltage range: 207 to 244 V a.c. (IEC 60038)
Power consumption: 5 VA
Load on relay outputs: 4(2) A - 230 V a.c
Load on triac outputs: 0,2 A - 230 V a.c.
Actuator AMV13 / AMV 150
Supply voltage 230 V a.c. - 50/60 Hz
Protection class: IP454
Power consumption 7 / 8 VA
For further information please refer to the enclosed instructions.
Pump Wilo Smart / Alpha2L
Supply voltage: 230 V AC – 50 Hz
Power consumption: Max. 31 Watt / Max. 25 Watt
Protection class: IP42
For further information please refer to the enclosed instructions.
16
DKDHR VI.HE.C2.02 Danfoss District Energy
Instructions for installation and use Akva Lux II S-F substations
Thermal actuator TWA-V
Electrical junction box
The electrical junction box houses the internal electrical connections
of the substation and allows the wiring in the substation to interface
with the main power supply provided by a local utility.
For the Akv Lux II S-F with junction box, the pump and zone valve are
pre-wired to the junction box, and the junction box is also prepared
for connection of a room thermostat.
In case of oor heating a safety switch is also connected in the junction
box, securing that zone valve and pump will close in case of overheat-
ing.
See enclosed wiring diagram for more information.
Zone valve / thermal actuator TWA-V
The Akva Lux II S-F can be supplied with zone valve/thermal actuator
TWA-V, which enables connection to an electronic programmable
room thermostat.
The thermal actuator of the zone valve is switched on by an exter-
nal contact from the room thermostat, and starts to open or close
the valve. The actuating movement is achieved by means of an
electrically heated expansion element. When the heating current is
switched o, the actuator shuts or opens the valve.
The actuator is equipped with a visual position indicator to show
the open or closed position of the valve.
TWA-A
For Danfoss RA valves
TWA-V
For Danfoss RAV/VMT valves
TWA-L
For Danfoss RAVL valves
TWA-K
For Heimeier/MNG/Oventrop
valves with M30 × 1.5 connection,
generally as per attached drawing.
Other valves must be veried
individually to ensure correct
valve closing measurement and
valve top geometry.
TWA-D
For Danfoss RTD valves
088R0248| 15.12.2005 | Version 03
INSTRUCTIONS
TWA NC
VI.SB.H3.02 12-2005 Produced by Danfoss Industri Service 05.09 JJ-Bi.DS
*) 24 V
Class II transformer (SELV)
**) 230 V max. 3 A pre-fuse
1717
Danfoss District Energy VI.HE.C2.02 DKDHR
Instructions for installation and use Akva Lux II S-F substations
Electronic programmable room thermostat (option)
If the substation is connected to a room thermostat the tempera-
ture 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 according to the set room
parameters.
Consult additional maintenance instructions for room thermostat
for further information. It is recommended to avoid fully opened
thermostats on some radiators and fully shut-o on others. Higher
temperature at the top and lower temperature at the bottom part
of radiators means that the system operation is correct. To keep cor-
rect temperature and friendly microclimate for human beings in the
apartment, it is recommended to ensure regular airing in rooms.
Safety valve
As optional equipment the substation can be equipped with a safety
valve set.
Please note that this is not part of the delivery and must be ordered
separately and mounted on site.
Always establish a blow-o pipe from the safety valve. The blow-o
pipe must be lead to a drain in accordance with applicable legislation.
Please note that installation of safety valve set is possible only for
installations with 120 mm ball valves.
Photo to your right illustrates safety set mounted in Akva Lux II S-F
substation.
10.0 Installation instructions, recirculation connection
If the household piping system features domestic hot water
recirculation, the substation must be connected to the recirculation
system. The circulation set for recirculation connection is not standard
equipment. The set must be purchased as extra equipment.
We recommend establishing recirculation BEFORE mounting the
substation on the wall.
Connect the recirculation pipe from the xed household piping to
the hexagon nipple at the bottom of the substation, - see photo to
your right .
You must always t a pump and a non-return valve to the recir-
culation pipe, with ow direction towards the substation.
A safety valve must be mounted in the DCW inlet.
If a time-controlled pump is used, we recommend setting of the
circulation water temperature to approx. 35°C.
Please note that if the circulation pump (outside the substation) is
stopped for a protracted period, we recommend that the bypass
thermostat is shut o for the same period.
Please note that four circulation sets for recirculation connection are
available as optional equipment.
The four circulation sets and and control change possibilities from
bypass to DHW recirculation will be described thoroughly on pages
18 to 25.
Connection to the household recirculation pipe
18
DKDHR VI.HE.C2.02 Danfoss District Energy
Instructions for installation and use Akva Lux II S-F substations
10.1 Installation instructions - recirculation connection - Circulation set 1 - 004U8400
You must always t a pump and non-return valve to the recircula-
tion pipe, with ow direction towards the substation.
A safety valve must be mounted in the DCW inlet.
Fig. 1
Remove the nipples/plugs from the domestic hot water controller
(use a 6 mm Allen key).
Fig. 2
Mount hexagon nipple A in the DHW controller (pack).
Fig. 3
Fit pipe bushing B in the DHW controller.
Fig. 4
Remove the existing capillary tube and union nut from bypass
thermostat and T-piece (do not re-use).
Fig. 1 Fig. 2
Akva Lux II S-F, Type 004U8325
Akva Lux II S-F, Type 004U8533
Akva Lux II S-F, Type 004U8327
Akva Lux II S-F, Type 004U8543
F
A
D
E2
C
G1
B
G2
H
I
J
K
L
M
Fig. 3 Fig. 4
E1
Akva Lux II S-F, Type 004U8367
1919
Danfoss District Energy VI.HE.C2.02 DKDHR
Instructions for installation and use Akva Lux II S-F substations
Fig. 5
Plug the hole in the T-piece with the steel ball C and a union nut D.
Fig. 6
Fit new capillary tube E2 in bypass thermostat by means of a cutting
ring F and a union nuts D. Tighten with single end wrench.
Fig. 7
Fit/screw hose end G1 onto the hexagon nipple A and t the other
end of the capillary tube E2 in pipe bushing B by means of a cutting
ring F and a union nut D. Tighten with single end wrench.
Fig. 8
Mount bracket H for recirculation connection on the mounting rail,
as shown, and fasten by means of two screws I.
Fig. 9
Mount non-return valve J and hexagon nipple K in the pump, as
shown in the photo to your right.
Fig. 10
Loosen union nut.
Fig. 11
Turn pump motor head by 180 degrees. Tighten the union nut
again.
Fig. 12
Please note that the arrow on the back of the housing indicates
the dirction of ow. - Please note the position of the arrow as
shown in the photo to your right.
Fig. 13
Fit pump in bracket H and fasten with locknut L.
Fig. 14
Fit circulation hose end G2 in non-return valve J. (Do not forget
gasket!)
Fig. 7 Fig. 8
Fig. 9
Fig.10
Fig. 11 Fig.12
J
K
Fig. 13 Fig.14
Fig. 5 Fig. 6
20
DKDHR VI.HE.C2.02 Danfoss District Energy
Instructions for installation and use Akva Lux II S-F substations
PLEASE NOTE (only for 004U8543):
For systems with DHW recirculation the bypass thermostat
must alway be installed before the heat meter.
On substations, that are supplied with bypass thermostat
mounted after the heat meter (Akva Lux II S-F, Type 004U8543),
the bypass thermostat must therefore be relocated before the
substation is prepared for recirculation, - i.e. the bypass ther-
mostat must be mounted before the heat meter.
Please follow the below instructions:
1.
Start by shutting o all connections to the substation.
2.
First follow the instructions for Fig. 1, 2 and 3 on page 15.
3.
Then demount 3/4” plug in T-piece (pos. A), as illustrated in g. 1.
4.
Remove the existing capillary tube from pos. C to D. See g. 2.
5.
Demount bypass thermostat incl. 3/4” reducer bushing from pos. B.
Unscrew 3/4” reducer bushing from bypass thermostat (the 3/4”
reducer bushing is not to be reused). See g. 3.
6.
Mount bypass thermostat in pos A, as illustrated in g. 4.
7.
Plug the hole in pos. B with 3/4” plug (from pos A) and gasket, as
illustrated in g. 5.
8.
Plug the hole in pos. D with a steel ball and 6 mm union nut, as il-
lustrated in g. 6.
9.
Finally follow instructions for g. 6 to 14 on pages 15 and16.
Fig. 1
Fig. 2
Fig. 3 Fig. 4
A
B
C
D
Fig. 5
A
D
Fig. 6
B
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