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Akva Lux II VX2
Operating guide
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Danfoss Akva Lux II VX2, Akva Lux II VX2-E, Akva Lux II VX3, Akva Lux II VX3-E Operating guide

MAKING MODERN LIVING POSSIBLE
Danfoss District Energy
Akva Lux II VX2, VX2-E, VX3, VX3-E
Instructions for installation and use
Instructions for installation and use Akva Lux II VX substations
Akva Lux II VX2 Akva Lux II VX2-E Akva Lux II VX3 Akva Lux II VX3-E
1. Contents
5.1 Akva Lux II VX2 ..................................................................................................................................................................................................................4
5.2 Akva Lux II VX2-E ..............................................................................................................................................................................................................5
5.3 Akva Lux II VX3 ..................................................................................................................................................................................................................6
5.4 Akva Lux II VX3-E ..............................................................................................................................................................................................................7
6.1 Akva Lux II VX2 ..................................................................................................................................................................................................................8
6.2 Akva Lux II VX2-E ..............................................................................................................................................................................................................9
6.3 Akva Lux II VX3 ............................................................................................................................................................................................................... 10
6.4 Akva Lux II VX3-E ........................................................................................................................................................................................................... 11
8.0 Mounting ................................................................................................................................................................................................................................ 13
8.1 Variable connection possibilities ............................................................................................................................................................................ 13
8.2 DHW recirculation Akva Lux II VX2 & Akva Lux II VX3......................................................................................................................................14
8.2.1 Mounting of circulation set for Akva Lux II VX2 & VX3 ......................................................................................................................... 14
8.2.2 Mounting of circulation set Akva Lux II VX2-E and VX3-E ................................................................................................................... 14
8.3 Safety thermostat ........................................................................................................................................................................................................ 15
8.4 Expansion vessel .......................................................................................................................................................................................................... 16
8.5 Heat meter, Fitting piece........................................................................................................................................................................................... 17
8.6 Test and connections ................................................................................................................................................................................................. 17
8.7 Mounting of outdoor temperature sensor ........................................................................................................................................................ 17
8.8 Safety valves .................................................................................................................................................................................................................. 17
12.1 Akva Lux II VX2 (ECL 110) ......................................................................................................................................................................................... 20
12.2 Akva Lux II VX2-E (ECL 310/A266) ......................................................................................................................................................................... 22
12.3 Akva Lux II VX3 (ECL210/A260) .............................................................................................................................................................................. 25
12.4 Akva Lux II VX3-E (ECL310/A376) .......................................................................................................................................................................... 28
14.0 Circulation pumps - Domestic hot water ..................................................................................................................................................................... 33
14.1 Wilo-Stratos ECO-Z (Circulation set 810.441) .................................................................................................................................................... 33
14.2 Wilo-Star-Z NOVA (Circulation set 810.443) ...................................................................................................................................................... 33
15.1 Maintenance plan (recommendations) .............................................................................................................................................................. 35
16.1 Troubleshooting - Heating ...................................................................................................................................................................................... 36
16.2 Troubleshooting - Domestic hot water ............................................................................................................................................................... 38
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DKDHR VI.GP.V2.02 Danfoss District Energy
Instructions Akva Lux II VX
2.0 Safety notes
Instructions
This operating manual should be read carefully before installation and start-up of the substation. The manufacturer accepts no liability for damage or faults that result from non-compliance with the operating manual. Please read and follow all the instructions carefully to prevent acci­dents, injury and damage to property. The risk of persons being injured and equipment damaged increases considerably if the recommended permissible operating parameters are exceeded. Installation, assembly work, rst start-up and maintenance work may be carried out only by qualied and authorized personnel in compli­ance with the safety regulations (both heating and electrical work).
Connection
The substation must be equipped with features that ensure that the substation can be separated from all energy sources (also power supply).
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 substation.
Energy source
The substation is designed for district heating as the primary source of energy. However, also other energy sources can be used where the operating conditions allow it and always are comparable to district heating.
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. Connect the substation to the house installation in a frost-free room, where the temperature does not exceed 50 °C and the humidity does not exceed 80%. Do not cover or wall up the substation or in any other way block the entrance to the station.
Choice of material
Choice of materials always in compliance with local legislation.
Corrosion protection
The maximum chloride compounds of the ow medium should not be higher than 300 mg/l. The risk of equipment corrosion increases considerably if the recommended permissible chloride compounds are exceeded.
Safety valve(s)
We recommend mounting of safety valve(s), however, always in com­pliance with local regulations.
Sound level.
≤ 55 dB.
Warning of high pressure and high temperature
The maximum supply temperature in the district heating network can be up to 110°C and the operating pressure can be up to 16 bar. This may result in a risk of scalding from touching the substation and from outow of the medium (water/steam). Exceeding 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 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 connections must be tightened once more.
(Do not overstrain! - See item 8.6, page 17)
3.0 Storage and Handling
Before installation, the units must be stored in a dry, heated (i.e. frost­free) room. (Relative humidity max. 80% and storage temperature 5-70 °C).
The units must not be stacked higher than the limit at the factory . 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.
Handling
We recommend minimum two people to lift the substation.
We recommend that you wear suitable safety footwear while handling and installing the substation.
4.0 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.
Danfoss District Energy VI.GP.V2.02 DKDHR
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Instructions Akva Lux II VXInstructions Akva Lux II VX
5.0 Diagram - Examples
5.1 Akva Lux II VX2
DHW
Circ.
DCW
DH Supply
DH Return
Bypass
1 Plate heat exchanger, HE, with insulation 2 Plate heat exchanger, DHW, with insulation 5 Strainer 6 Non-return valve 7 Ball valve 8 Circulation pump HE 11 Safety valve, HE 2,5 bar 12 Safety valve, DHW 10 bar 13 Thermometer 14 Pocket for pressure gauge 15 Manometer 16 Expansion vessel 12 L 17 Air valve 22 Safety thermostat Danfoss AT 23 Sensor pocket for heat meter ½“ 24 Fitting piece for heat meter, 1” x 130 mm
Measurements:
HE Return
HE Supply
25 Controller Danfoss ECL 110/A130 26 Outdoor sensor Danfoss ESMT 27 Sensor Danfoss ESMC 29 Danfoss actuator AMV 150 30 2-way valve VS2 38 Domestic hot water controller Danfoss PTC2 +P 40 Danfoss FJVR for bypass/circulation
--------------------------------------------------------------­62 Non-return valve (not part of dly) 64 Circulation pump (not part of dly)
Please note that the unit does not include strainer on DH supply. It is the responsibility of the energy supplier to secure that a strainer, mesh 0.6 mm, is tted on the primary side.
Dimensions without cover H730 x W530 x D360 mm
Dimensions with cover H780 x W550 x D380 mm
Connections:
Order: 1 District heating (DH) supply 2 District heating (DH) return 4 Heating (HE) return 5 Heating (HE) supply 6 Domestic hot water (DHW) 7 Domestic cold water (DCW)
wall
Connection sizes: DH: G¾ (ET) HE: G¾ (ET) DHW, DCW: G¾ (ET)
top view
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DKDHR VI.GP.V2.02 Danfoss District Energy
Circ.: G¾” (IT )
Instructions Akva Lux II VX
5.2 Akva Lux II VX2-E
DHW
Circ.
DCW
DH Supply
DH Return
1 Plate heat exchanger, HE, with insulation 2 Plate heat exchanger, DHW , with insulation 5 Strainer 6 Non-return valve 7 Ball valve 8 Circulation pump HE 9 Circulation pump DHW circ. 11 Safety valve, HE 2,5 bar 12 Safety valve, DHW 10 bar 13 Thermometer 14 Pocket for pressure gauge ½” 15 Manometer 16 Expansion vessel 12 L 17 Air valve 20 Switch box for pumps
HE Return
HE Supply
21 Flow switch 22 Safety thermostat Danfoss AT 23 Sensor pocket for heat meter ½“ 24 Fitting piece for heat meter, 1” x 130 mm 25 Controller Danfoss ECL 310/A266 26 Outdoor sensor Danfoss ESMT 27 Sensor Danfoss ESMC 29 Danfoss actuator AMV 150 30 2-way valve VS2 31 Danfoss actuator AMV 30 32 2-way valve VM 2
Please note that the unit does not include strainer on DH supply. It is the responsibility of the energy supplier to secure that a strainer, mesh 0.6 mm, is tted on the primary side.
Measurements:
Dimensions without cover H870 x W530 x D360 mm
Dimensions with cover H870 x W595 x D380 mm
Connections:
Order: 1 District heating (DH) supply 2 District heating (DH) return 4 Heating (HE) return 5 Heating (HE) supply 6 Domestic hot water (DHW) 7 Domestic cold water (DCW)
wall
Connection sizes: DH: G¾ (ET) HE: G¾ (ET) DHW, DCW: G¾ (ET)
top view
Circ.: G¾” (IT )
Danfoss District Energy VI.GP.V2.02 DKDHR
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Instructions Akva Lux II VX
5.3 Akva Lux II VX3
DHW
Circ.
DCW
DH Supply
DH Return
Bypass
1 Plate heat exchanger, HE, with insulation 2 Plate heat exchanger, DHW, with insulation 5 Strainer 6 Non-return valve 7 Ball valve 8 Circulation pump HE 11 Safety valve, HE 2,5 bar 12 Safety valve, DHW 10 bar 13 Thermometer 14 Pocket for pressure gauge ½” 15 Manometer 17 Air valve 22 Safety thermostat Danfoss AT 23 Sensor pocket for heat meter ½“ 24 Fitting piece for heat meter, 1” x 130 mm 25 Controller Danfoss ECL 310/A260
HE Return
HE Supply
HE Return
HE Supply
26 Outdoor sensor Danfoss ESMT 27 Sensor Danfoss ESMC 29 Danfoss actuator AMV 150 30 2-way valve VS2 38 Domestic hot water controller Danfoss PTC2 +P 40 Danfoss FJVR for bypass/circulation
--------------------------------------------------------------­16 Expansion vessel 12 L 62 Non-return valve (not part of dly) 64 Circulation pump (not part of dly)
Please note that the unit does not include strainer on DH supply. It is the responsibility of the energy supplier to secure that a strainer, mesh 0.6 mm, is tted on the primary side.
Measurements:
Dimensions without cover H860 x W660 x D360 mm
Dimensions with cover H860 x W700 x D380 mm
top view
Connections:
Order: 1 District heating (DH) supply 2 District heating (DH) return 3 Heating (HE) return 4 Heating (HE) supply
Connection sizes: DH: G¾ (ET) HE: G¾ (ET) DHW, DCW: G¾ (ET)
Circ.: G¾” (IT ) 5 Heating (HE) return 6 Heating (HE) supply 7 Domestic hot water (DHW) 8 Domestic cold water (DCW)
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DKDHR VI.GP.V2.02 Danfoss District Energy
Instructions Akva Lux II VX
5.4 Akva Lux II VX3-E
DHW
Circ.
DCW
DH Supply
DH Return
1 Plate heat exchanger, HE, with insulation 2 Plate heat exchanger, DHW, with insulation 5 Strainer 6 Non-return valve 7 Ball valve 8 Circulation pump HE 9 Circulation pump DHW circ. 11 Safety valve, HE 2,5 bar 12 Safety valve, DHW 10 bar 13 Thermometer 14 Pocket for pressure gauge ½” 15 Manometer 17 Air valve 20 Switch box for pumps 21 Flow switch 22 Safety thermostat Danfoss AT 23 Sensor pocket for heat meter ½“
HE Supply
HE Return
HE Supply
HE Return
24 Fitting piece for heat meter, 1” x 130 mm 25 Controller Danfoss ECL 310/A376 26 Outdoor sensor Danfoss ESMT 27 Sensor Danfoss ESMC 29 Danfoss actuator AMV 150 30 2-way valve VS2 31 Danfoss actuator AMV 30 32 2-way valve VM2
--------------------------------------------------------------­16 Expansion vessel 12 L incl. brackets and T-piece (supplied loose)
Please note that the unit does not include strainer on DH supply. It is the responsibility of the energy supplier to secure that a strainer, mesh 0.6 mm, is tted on the primary side.
Measurements:
Dimensions without cover H870 x W660 x D360 mm
Dimensions with cover H870 x W700 x D380 mm
Connections:
top view
Order: 1 District heating (DH) supply 2 District heating (DH) return 3 Heating (HE) return 4 Heating (HE) supply 5 Heating (HE) return 6 Heating (HE) supply
Connection sizes: DH: G¾ (ET) HE: G¾ (ET) DHW, DCW: G¾ (ET)
Circ.: G¾” (IT ) 7 Domestic hot water (DHW) 8 Domestic cold water (DCW)
Danfoss District Energy VI.GP.V2.02 DKDHR
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Instructions Akva Lux II VX
6.0 Main components
6.1 Akva Lux II VX2
1 Plate heat exchanger HE 2 Plate heat exchanger DHW 8 Pump, HE 11 Safety valve HE 12 Safety vale DHW 16 Expansion vessel 17 Air valve 22 Safety thermostat 24 Fitting piece for heat meter 25 Electronic controller ECL110 29 Actuator AMV 150 30 2-way valve VS 2 38 PTC2+P controller 40 Danfoss thermostat for bypass/circulation
The substations oer variable connection possibilities, as con­nection of pipes can be established both in the top or in the bottom of the substation.
17
22
38
2
30
29
40
25
1
8
16
Please note:
Your substation may look dierent 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.
Accessories to be ordered separately (mounting on site):
Circulation set - Art. No. 810.441 For systems with DHW circulation.
White-lacquered steel-sheet cover Art. No. 936.0811
DH supply
Primary
11
12
24
DCW
DHW
DH return
HE return
Secondary
HE supply
DHW
810.441
936.0811
8
DKDHR VI.GP.V2.02 Danfoss District Energy
Instructions Akva Lux II VX
6.2 Akva Lux II VX2-E
1 Plate heat exchanger HE 2 Plate heat exchanger DHW 8 Pump HE 9 Circulation pump, DHW circ. 11 Safety valve HE 12 Safety vale DHW 16 Expansion vessel 17 Air valve 20 Switch box for pumps 21 Flowswitch 22 Safety thermostat 24 Fitting piece for heat meter 25 Electronic controller EC310/A266 29 Actuator AMV 150 30 2-way valve VS 2 31 Actuator AMV 30 32 2-way valve VM2
The substations oer variable connection possibilities, as con­nection of pipes can be established both in the top or in the bottom of the substation.
17
25
1
22
2
29
20
30
16
8
31
32
12
Please note:
Your substation may look dierent 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.
Accessories, which are supplied loose with the substation (mounting on site):
Circulation set - Art.No. 810.443 The circulation set is supplied assembled and electrically wired and ready to mount on the substation as shown on the above photo.
Accessories to be ordered separately (mounting on site):
White-lacquered steel-sheet cover Art. No. 936.0811
DH supply Primary
24
DH return
Secondary DHW
HE return
11
9
HE supply
DHW
21
Circulation set
DCW
936.0811
Danfoss District Energy VI.GP.V2.02 DKDHR
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Instructions Akva Lux II VX
6.3 Akva Lux II VX3
1 Plate heat exchanger HE 2 Plate heat exchanger DHW 8 Pump, HE 11 Safety valve HE 12 Safety valve DHW 17 Air valve 22 Safety thermostat 24 Fitting piece for heat meter 25 Electronic controller ECL 310/260 29 Actuator AMV 150 30 2-way valve VS2 38 PTC2+P controller 40 Danfoss thermostat for bypass/circulation
The substations oer variable connection possibilities, as connection of pipes can be established both in the top or in the bottom of the substation.
22
17
38
2
25
1
29
30
30
29
40
Please note:
Your substation may look dierent 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
Accessories, which are supplied loose with the substation (mounting on site):
Expansion vessel - Art. No. RES. 178
Accessories to be ordered separately (mounting on site):
Circulation set - Art. No. 810.441 For systems with DHW circulation.
White-lacquered steel-sheet cover Art. No. 936.1541
8
24
DH return
DH supply
Primary Secondary
HE return
936.1541
HE supply
8
12
11
DCW
DHW
HE return
HE upply
DHW
810.441
10
DKDHR VI.GP.V2.02 Danfoss District Energy
RES.178
Instructions Akva Lux II VX
6.4 Akva Lux II VX3-E
1 Plate heat exchanger HE 2 Plate heat exchanger DHW 8 Pump, HE 9 Circulation pump, DHW circ. 11 Safety valve HE 12 Safety vale DHW 17 Air valve 19 Connection for di. pressure controller 20 Switch box for pumps 22 Safety thermostat 21 Flowswitch 24 Fitting piece for heat meter 25 Electronic controller ECL 310/A376 29 Actuator AMV 150 30 2-way valve VS2 31 Actuator AMV 30 32 2-way valve VM2
The substations oer variable connection possibilities, as connection of pipes can be established both in the top or in the bottom of the substation.
17
25
1
20
22
31
29
29
2
32
30
30
8
8
12
11
Please note:
Your substation may look dierent 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.
Accessories, which are supplied loose with the substation (mounting on site):
Expansion vessel - Res. 178
Circulation set - Art.No. 810.443 The circulation set is supplied assembled and electrically wired and ready to mount on the substation as shown on the above photo.
Accessories to be ordered separately (mounting on site): White-lacquered steel-sheet cover Art. No. 936.1541
RES.178
24
DH return
DH supply
Primary Secondary
HE return
HE supply
936.1541
9
HE return
HE supply
DHW
DHW
21
Circulation set
DCW
Danfoss District Energy VI.GP.V2.02 DKDHR
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Instructions Akva Lux II VX
7.0 Getting started
Connect the substation to the household piping in accordance with the labelling at the bottom and in accordance with the instructions in this manual.
If the system features DHW recirculation, a recirculation connection must be established on the substation.
For instructions about recirculation connection, see page 14.
We recommend establishing recirculation BEFORE mounting the substation on the wall.
Start-up
1. The ball valves are supplied loose with the substation. Mount the ball valves for DH supply and return as well as the ball valves for HE supply and return in the top of the substation. Mount the ball valves for DHW and DCW in the bottom of the substation.
2. Please note that change of connection from bottom to top for DCW and DHW includes relocation of blind plates BEFORE mounting the substation on the wall. (See page 13, item 8.1 for further information.
14. Check the substation and the household piping carefully for any leaks
15. Pressure test the entire system for leaks in accordance with the applicable regulations.
16. Connect pump(s) and automatic components to the electricity supply, but do not switch on the power.
3. The substations are for wall mounting, and the mounting sheet has got holes for installation. Fix the substation on a solid wall with two sturdy bolts, screws, expansion bolts or the like. Please note that we recommend min. two people to lift the substation.
4. Close all shut-o valves at the substation before connecting them to the household piping.
5. Mount expansion vessel on substation types Akva Lux II VX3 and Akva Lux II VX3-E, - see page 16.
6. Mount heat meter, - see page 17.
7. IMPORTANT! Tighten all connections, as vibrations dur­ing transport and handling may have caused leaks. CAUTION! Please note that the connections may be supplied with EPDM rubber gaskets. Therefore take care not to over- strain the union nuts, as this may result in leaks. The manu­facturer accepts no liability for leaks that result from overstrain of union nuts.
8. On systems that feature a safety valve, establish a drain con­nection in compliance with the applicable legislation.
9. Set temperature for AT safety thermostat for oor or radiator heat­ing.
10. If the household piping system features domestic hot water recirculation, the substation must be connected to the recir­culation system. See page 14 for more information about DHW recirculation.
11. Carefully open the ball valves for the HE supply and return ow as well as the ball valve for DCW. Carefully open the ll valve and ll the system with water and at the same time vent the system. Fill the heat exchanger / the system with water until the manome­ter shows a working pressure, which correspondes to the system height + 5 m (approx. 1.2 - 1.5 bar), - see page 18.
17. Heat the system and vent the radiator circuit/heating side thoroughly on the radiators and the air valve, if any.
18. Switch on the pumps and automatic components.
19. Finish by adjusting the substation in accordance with this instruction manuals.
IMPORTANT! Heating and cooling of the system may cause leaks. Therefore it may be necessary to retighten the connec­tions in the period after commissioning.
Check list!
1. Remove plug, if DCW connection is established in top.
2. Remove plug, if DHW connection is established in top.
3. Set AT thermostat for oor or radiator heating.
4. Adjust the bypass valve.
5. Connect outdoor temperature sensor to the ECL controller. (ECL 110, terminals 1 and 2), (ECL 310, terminals 29 and 30).
6. Adjust controller’s min/max. temperature and heating curve, - for oor or radiator heating.
12. Close the ll valve.
13. Subsequently open the ball valve for the DH supply and return ow and heat up the system.
12
DKDHR VI.GP.V2.02 Danfoss District Energy
Instructions Akva Lux II VX
8.0 Mounting
The installation, connection and maintenance of the substation must be performed by qualied and authorised personnel. Installation must always be performed in accordance with the ap­plicable 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/rear section and secure it to a solid wall using 2 sturdy bolts, screws or expansion bolts positioned in the two key­holes in the mounting plate/rear section. 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 instruc­tions in this manual.
8.1 Variable connection possibilities
The substations oer variable connection possibilities, as connec­tion of pipes can be established in the top or in the bottom of the substation.
Upon delivery the ball valves are supplied loose with the substation and the substation is prepared for mounting of the ball valves for DH supply and return as well as the ball valves for HE supply and return in top of the substation and for mounting of the ball valves for DHW and DCW in the bottom of the substation, as illustrated on the photo to your right (g. B).
For substations, on which the ball valves are mounted according to the above, it is possible to change the connection order as follows:
Fig. A
Fig. B
DCW pipe
DHW pipe
For change of connection from top to bottom for DH supply and return and HE supply and return, demount plugs on connection pipes in bottom of substation and ball valves on connection pipes in top of substations and mount plugs in connection pipes in top of substation and ball valves on connection pipes in bottom of substation.
For change of connection from bottom to top for DHW and DCW please follow the below instructions:
Fig. 1: Demount plugs on connection pipes in top of substation
Fig. 2: Demount ball valves on connection pipes in bottom of substation
Fig. 3: Relocate blind plate in T-piece on DHW pipe as shown on photo to your right. Please note the easy access to the T-piece through a cut out in the back plate.
Fig. 4: Demount blind plate on DCW pipe
Fig. 5: Mount ball valves on DCW and DHW connection pipes in top of substation.
Fig. 6: Mount plugs in DCW and DHW connection pipes in bottom of substation
Please note Akva Lux II VX3-E is supplied with blind plate on the DCW pipe only.
Fig. 1 Fig. 2
Fig. 3 Fig. 4
Fig. 5 Fig. 6
Danfoss District Energy VI.GP.V2.02 DKDHR
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Instructions Akva Lux II VX
8.2 DHW recirculation Akva Lux II VX2 & Akva Lux II VX3
If the household plumbing system includes hot water recirculation the substation must be connected to the hot water recirculation system by using this circulation set.
It is to be recommended to prepare the substation for recirculation BEFORE mounting it on the wall.
8.2.1 Mounting of circulation set for Akva Lux II VX2 & VX3
Fig. 1. Mount the circulation set on the DCW inlet pipe in the bot-
tom of the substation. The pump must be installed so that the pump is pumping water towards the substation.
Fig. 2. The circulation set is supplied loose, as illustrated in g. 2a.
Assemble the circulation set as illustrated in g. 2b, and re­member to use packing yarn when packing the hexagon nipple/non-return valve in the 5/4” pump union piece and make sure that the arrow on the hexagon nipple/non-return valve points upwards.
Fig. 3. Demount the safety valve (to be reused).
Fig. 4. Turn the T-piece 45°, as illustrated in g. 4.
Fig. 5. Fit the circulation set to the T-piece.
Fig. 6. Remount safety valve on circulation set.
Connect the pump to the household electrical wiring. For
setting and venting of pump, please refer to page 33.
Pack
Pack
Fig. 1 Fig. 2a Fig. 2b
Fig. 3 Fig. 4
Fig. 5 Fig. 6
Akva Lux II VX2 with circulation set
8.2.2 Mounting of circulation set Akva Lux II VX2-E and VX3-E
The circulation set is supplied assembled and electrically wired and ready to be mounted on the DCW inlet pipe in the bottom of the substation before start up. See photo on page 9 and 11.
14
DKDHR VI.GP.V2.02 Danfoss District Energy
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