Danfoss Akva Lux II S-F Operating instructions

Brand: Danfoss

Model: Akva Lux II S-F

Type: Operating instructions

Danfoss District Energy

MAKING MODERN LIVING POSSIBLE

Akva Lux II S-F

Instructions for installation and use

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 Certicate ..........................................................................................................................................................................................................39

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 Dierential 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 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.

Connections size:

DH, HE, DHW, DCW: G¾” IT

Recirc.: R½” ET

Supply

Return

DCW

DHW

DCW

Connection for circ

Bypass

(Standard)

Room thermostat

(dly. as loose part)

Circ. (option)

Option

Primary Secondary

Domestic water

DHW DCW HE

Return

Supply

Return

DCW

30a

2 Plate heat exchanger, DHW

4 Dierential 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.

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 Dierential 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 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.

Connections size:

DH, HE, DHW, DCW: G¾” IT

Recirc.: R½” ET

Supply

Return

DCW

DHW

DCW

Connection for circ

Bypass

(Standard)

Room thermostat

(dly. as loose part)

Circ. (option)

Option

2 Plate heat exchanger, DHW

4 Dierential 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.

Primary SecondaryDomestic water

DHW DCW HE

Return

Supply

Return

DCW

30a

El box

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 Dierential 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 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.

Connections size:

DH, HE, DHW, DCW: G¾” IT

Recirc.: R½” ET

Supply

Return

DCW

DHW

DCW

Connection for circ

Bypass

(Standard)

Circ. (option)

Option: Before heat meter

2 Plate heat exchanger, DHW

4 Dierential 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.

Primary Secondary

Domestic water

DHW DCW

Return

Supply

Return

DCW

This picture shows Akva Lux II S-F with AMV 150

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 Dierential 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 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.

Connections size:

DH, HE, DHW, DCW: G¾” IT

Recirc.: R½” ET

Supply

Return

DCW

DHW

DCW

Connection for circ.

Bypass

(Standard)

Circ. (option)

2 Plate heat exchanger, DHW

4 Dierential 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.

Primary Secondary

Domestic water

DHW DCW

Return

Supply

Return

DCW

This picture shows Akva Lux II S-F with AMV 13

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 Dierential 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 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.

Connections size:

DH, HE, DHW, DCW: G¾” IT

Recirc.: R½” ET

Supply

Return

DCW

DHW

DCW

Bypass

(Standard)

2 Plate heat exchanger, DHW

4 Dierential 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

Primary SecondaryDomestic water

DHW DCW

Return

Supply

Return

DCW

30A

230 V

(from room thermostat)

Connection for circ.

DKDHR VI.HE.C2.02 Danfoss District Energy

Instructions for installation and use Akva Lux II S-F substations

440

25 65 65 65 65 65 65 25

25 115

551

175

Danfoss Standard

1:5

Material

SizeScale

Projection

Danfoss Redan A/S

Approval

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.

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

440 45

25 65 65 65 65 65 65 25

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

1:5

Material

SizeScale

Projection

Danfoss Redan A/S

Approval

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.

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

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 qualied 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 dierential 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 dierence between the supply and

return temperature of the district heating water – has a signicant 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 outow 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 dierence should typically be 30–35°C in systems that operate

with radiators. In systems that feature oor heating, the dierence

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.

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, Dierential Pressure Controller

The dierential pressure controller (Fig. 3) reduces the high, uctu-

ating pressure in the district heating network to a constant operat-

ing pressure. The dierential 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 dieren-

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

qualied 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 eected 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 outow 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.

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 dierential 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 dierent 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 qualied 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

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).

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

qualied 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.

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 veried

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

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

Fig. 3 Fig. 4

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

Fig. 13 Fig.14

Fig. 5 Fig. 6

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:

Start by shutting o all connections to the substation.

First follow the instructions for Fig. 1, 2 and 3 on page 15.

Then demount 3/4” plug in T-piece (pos. A), as illustrated in g. 1.

Remove the existing capillary tube from pos. C to D. See g. 2.

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.

Mount bypass thermostat in pos A, as illustrated in g. 4.

Plug the hole in pos. B with 3/4” plug (from pos A) and gasket, as

illustrated in g. 5.

Plug the hole in pos. D with a steel ball and 6 mm union nut, as il-

lustrated in g. 6.

Finally follow instructions for g. 6 to 14 on pages 15 and16.

Fig. 1

Fig. 2

Fig. 3 Fig. 4

Fig. 5

Fig. 6

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Danfoss Akva Lux II S-F Operating instructions

Danfoss Akva Lux II S-F Operating instructions

Danfoss Akva Lux II S-F Operating instructions

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