Danfoss Akva Lux II VX Operating guide

Instructions for installation and use Akva Lux II VX substations

Akva Lux II VX thermostatic control

Akva Lux II VX thermostatic control, and optional junction box + zone valve

Akva Lux II VX (ECL 110)

Akva Lux II VX HWP (ECL210)

Akva Lux II VX H2WP (ECL 210)

1. Contents

1.0 Contents .....................................................................................................................................................................................................................................1

2.0 Product introduction .............................................................................................................................................................................................................2

3.0 Dimensional sketches / connections ..............................................................................................................................................................................7

4.0 Enduser instructions, General ............................................................................................................................................................................................8

5.0 Enduser instructions, Initial adjustment and Setting ................................................................................................................................................9

6.0 Enduser instructions, Safety and Handling ................................................................................................................................................................ 11

7.0 Installation instructions - Getting started .................................................................................................................................................................. 12

8.0 Installation instructions, general .................................................................................................................................................................................... 13

9.0 Recirculation connection .................................................................................................................................................................................................. 19

9.1 Installation instructions - recirculation instructions ........................................................................................................................................ 20

10.0 Description of the Akva Lux II VX variants ................................................................................................................................................................... 21

10.1 Akva Lux II VX (thermostatic control) - 1 HE circuit + instantaneous DHW............................................................................................. 21

10.2 Akva Lux II VX (thermostatic control, optional junction box + zone valve) - 1 HE circuit + instantaneous DHW ..................... 24

10.3 Akva Lux II VX (ECL110) - 1 HE circuit + instantaneous DHW ....................................................................................................................... 27

10.4 Akva Lux II VX HWP (ECL 210/A237) - 1 HE circuit + instantaneous DHW ............................................................................................... 30

10.5 Akva Lux II VX H2WP (ECL 210/A260) - 2 HE circuits + instantaneous DHW ..........................................................................................32

11.0 Circulation pumps ................................................................................................................................................................................................................ 35

12.0 Domestic hot water (DHW) ............................................................................................................................................................................................... 39

12.1 Regulation of the domestic hot water temperature ....................................................................................................................................... 39

12.2 Bypass or circulation thermostat ........................................................................................................................................................................... 39

13.0 Maintenance ........................................................................................................................................................................................................................... 40

13.1 Maintenance schedule (recommendations) ...................................................................................................................................................... 41

14.0 Troubleshooting .................................................................................................................................................................................................................... 42

14.1 Troubleshooting - Heating ....................................................................................................................................................................................... 42

14.2 Troubleshooting - Domestic hot water ................................................................................................................................................................44

15.0 EU Declaration of Conformity .......................................................................................................................................................................................... 45

16.0 Commissioning Certicate ................................................................................................................................................................................................ 46

Danfoss District Energy VI.GP.Q3.02 DKDHR

Instructions for installation and use Akva Lux II VX substations

2.0 Product introduction

2.1 Akva Lux II VX (thermostatic control) - 1 HE circuit and instantaneous domestic hot water heater

1 Plate heat exchanger, HE, insulated 2 Plate heat exchanger, DHW 4 Dierential pressure controller AVPL 5 Dirt strainer 6 Non-return valve 7 Ball valve 8 Circulation pump, HE 9 Plug 11 Safety valve, HE, 2.5 bar 12 Safety valve, DHW, 10 bar 13 Thermometer 14 Pocket for pressure gauge ¼ 15 Manometer

DHW

Circ.

DCW

16 Expansion vessel 12 l 17 Air valve 23 Sensor pocket for heat meter ½“ 24 Flex. tting piece for heat meter, 3/4” x 110-165 mm 30 Thermostat T°C200 / VS2-15 or AVTB 38 PTC2 + P controller 40 Danfoss thermostat for bypass/circulation

--------------------------------------------------------------61 Recirculation hose (not part of the delivery) 62 Non-return valve (not part of the delivery) 64 Circulation pump DHW recirculation. (not part of the delivery)

DH Supply

DH Return

Principal components

1 Plate heat exchanger HE 2 Plate heat exchanger DHW 4 Dierential pressure controller 7 Ball valve (ll valve) 8 Circulation pump, HE 11 Safety valve, HE 12 Safety valve, DHW 16 Expansion vessel 17 Air valve 24 Fitting piece for heat meter 30 Thermostat T°C 200 / VS2 38 PTC2+P controller 40 Thermostat for bypass/circulation

The substation oers variable connection possibilities, as connection of pipes can be established both in the top or in the bottom of the substation. Please note that the ball valves are supplied loose with the substation, - for mounting on site.

Accessories available as extra equipment (mounting on site)

Recirculation pipe set - Div.736 - Code No. 004U8404 For systems that feature domestic hot water recirculation.

Rell line - Div.770 - Code No. 004U8668 To secure a constant pressure on the secondary side.

(Applicable on some markets, if in accordance with all local regulations, please check with your heating supplier).

Recirculation pipe set

Rell line

HE Supply

HE Return

16 2

DHW

DH return

DH supply

Primary

DKDHR VI.GP.Q3.02 Danfoss District Energy

HE return

HE supply

Secondary DHW

DCW

Instructions for installation and use Akva Lux II VX substations

2.2 Akva Lux II VX (thermostatic control and optional junction box + zone valve) - 1 HE circuit and instantaneous DHW heater

1 Plate heat exchanger, HE, insulated 2 Plate heat exchanger, DHW, insulated 4 Dierential pressure controller AVPL 5 Dirt strainer 6 Non-return valve 7 Ball valve 8 Circulation pump, HE 11 Safety valve, HE

DHW

DCW

(Option: Circ. div. 736)

DH Supply

DH Return

Circ. (option)

Bypass (standard)

12 Safety valve, DHW 13 Thermometer 0 - 120° C 13A Thermometer 0 - 160° C 14 Pocket for pressure gauge ¼ 15 Manometer 16 Expansion vessel 17 Air valve 23 Sensor pocket for heat meter ½“ 24 Fitting piece for heat meter, 3/4” x 110 mm 30 Thermostat T°C200 / VS2-15 38 PTC2 + P controller 40 Danfoss thermostat for bypass/circulation

--------------------------------------------------------------Option: Rell line - delivered loose Options: Ball valve 70 Zone valve 62 Non-return valve 71 Junction box 63 Pressure reducing valve Socla kv=3

(Option: Zone valve + junction box

HE Supply

HE Return

(Option: Rell line)

Principal components

1 Plate heat exchanger HE 2 Plate heat exchanger DHW 4 Dierential pressure controller 8 Circulation pump, HE 11 Safety valve HE 12 Safety valve DHW 16 Expansion vessel 17 Air valve 24 Fitting piece for heat meter 30 Thermostat T°C 200 / VS2 38 PTC2+P controller 40 Thermostat for bypass/circulation 70 Zone valve (Option) 71 Junction box (Option)

Accessories available as extra equipment (mounting on site)

Recirculation pipe set - Div.736 - Code No. 004U8404 For systems that feature domestic hot water recirculation.

Rell line - Div.770 - Code No. 004U8668 To secure a constant pressure on the secondary side.

(Applicable on some markets, if in accordance with all local regulations, please check with your heating supplier).

Recirculation pipe set

Rell line

DCW

DHW

DH supply

Primary

DH return

HE return

HE supply

Secondary DHW

Danfoss District Energy VI.GP.Q3 .02 DKDHR

Instructions for installation and use Akva Lux II VX substations

2.3 Akva Lux II VX (ECL 110) - 1 HE circuit and instantaneous domestic hot water heater

DHW

DCW

(Option: Circ. div. 736)

DH Supply

DH Return

Circ. (option)

Bypass (standard)

12 Safety valve, DHW 13 Thermometer 0 - 120° C 13A Thermometer 0 - 160° C 14 Pocket for pressure gauge ¼ 15 Manometer 16 Expansion vessel 23 Sensor pocket for heat meter ½“ 24 Fitting piece for heat meter, 3/4” x 110 mm 25 Electronic controller Danfoss ECL 110 26 Outdoor sensor Danfoss ESMT 27 Sensor Danfoss ESMC 29 Danfoss actuator AMV 150 30 2-way valve VS2 38 PTC2 + P controller 40 Danfoss thermostat for bypass/circulation

--------------------------------------------------------------Option: Rell line - delivered loose 7 Ball valve 62 Non-return valve 63 Pressure reducing valve Socla kv=3

HE Supply

HE Return

(Option: Rell line)

Principal components

1 Plate heat exchanger HE 2 Plate heat exchanger DHW 4 Dierential pressure controller 8 Circulation pump, HE 11 Safety valve, HE 12 Safety valve, DHW 16 Expansion vessel 24 Fitting piece for heat meter 25 Electronic controller 29 Actuator AMV 150 30 2-way valve VS2 38 PTC2+P controller 40 Thermostat for bypass/circulation

Accessories available as extra equipment (mounting on site)

Recirculation pipe set - Div.736 - Code No. 004U8404 For systems that feature domestic hot water recirculation.

Rell line - Div.770 - Code No. 004U8668 To secure a constant pressure on the secondary side.

(Applicable on some markets, if in accordance with all local regulations, please check with your heating supplier).

Rell lineRecirculation pipe set

DHW

DH return

DH supply

Primary

DKDHR VI.GP.Q3.02 Danfoss District Energy

HE return

HE supply

Secondary DHW

DCW

Instructions for installation and use Akva Lux II VX substations

2.3 Akva Lux II VX HWP (ECL 210/A237) - 1 HE circuit and instantaneous domestic hot water heater

1 Plate heat exchanger, HE, insulated 2 Plate heat exchanger, DHW, insulated 5 Dirt strainer 6 Non-return valve 7 Ball valve 8 Circulation pump, HE 11 Safety valve, HE

DHW

12 Safety valve, DHW 13 Thermometer 14 Pocket for pressure gauge ¼ 15 Manometer 16 Expansion vessel 23 Sensor pocket for heat meter ½“ 24 Fitting piece for heat meter, 3/4” x 110 mm 25 Electronic controller Danfoss ECL 210/A237 26 Outdoor sensor Danfoss ESMT 27 Sensor Danfoss ESMC 29 Danfoss actuator AMV 150 30 Multifunctional control valve AHQM 38 PTC2 + P controller 40 Danfoss thermostat for bypass/circulation

--------------------------------------------------------------Options.: Recirculation set Electronic Danfoss Controller ECL 310

DCW

Circ. (option)

DH Supply

Bypass

DH Return

Principal components

1 Plate heat exchanger HE 2 Plate heat exchanger DHW 5 Strainer 8 Circulation pump, HE 11 Safety valve, HE 12 Safety valve, DHW 16 Expansion vessel 24 Fitting piece for heat meter 25 Electronic controller ECL 210/A237 29 Actuator AMV 150 30 Multifunctional control valve AHQM 38 PTC2+P controller 40 Thermostat for bypass/circulation

HE Supply

HE Return

Accessories available as extra equipment (mounting on site)

Recirculation pipe set - Div.736 - Code No. 004U8404 For systems that feature domestic hot water recirculation.

Rell line - Div.770 - Code No. 004U8668 To secure a constant pressure on the secondary side.

(Applicable on some markets, if in accordance with all local regulations, please check with your heating supplier).

Rell lineRecirculation pipe set

Danfoss District Energy VI.GP.Q3 .02 DKDHR

DH supply

Primary

DH return

HE return

HE supply

Secondary DHW

DHW

DCW

Instructions for installation and use Akva Lux II VX substations

2.4 Akva Lux II VX H2WP (ECL 210/A260) - 2 HE circuits and instantaneous domestic hot water heater

1 Plate heat exchanger, HE, insulated 2 Plate heat exchanger, DHW, insulated 5 Dirt strainer 6 Non-return valve 7 Ball valve 8 Circulation pump, HE 10 Circulation pump, FH 11 Safety valve, HE 12 Safety valve, DHW 13 Thermometer

14 Pocket for pressure gauge ¼ 15 Manometer 16 Expansion vessel 23 Sensor pocket for heat meter ½“ 24 Fitting piece for heat meter, 3/4” x 110 mm 25 Electronic controller Danfoss ECL 210/A260 26 Outdoor sensor Danfoss ESMT 27 Sensor Danfoss ESMC 28 Immersion sensor ESMB

DHW

DCW

Circ. (option)

DH Supply

Bypass

DH Return

Principal components

1 Plate heat exchanger HE 2 Plate heat exchanger DHW 5 Dirt strainer 8 Circulation pump, HE 10 Circulation pump, FH 11 Safety valve, HE 12 Safety valve, DHW 16 Expansion vessel 24 Fitting piece for heat meter 25 Electronic controller 29 Actuator AMV 13 30 Multifunctional control valve AHQM 33 Actuator AMV 150 34 3-way valve VMV 38 PTC2+P controller 40 Thermostat for bypass/circulation 57 Safety thermostat

Accessories available as extra equipment (mounting on site)

Recirculation pipe set - Div.736 - Code No. 004U8404 For systems that feature domestic hot water recirculation.

Rell line - Div.770 - Code No. 004U8668 To secure a constant pressure on the secondary side.

(Applicable on some markets, if in accordance with all local regulations, please check with your heating supplier).

Rell lineRecirculation pipe set

29 Danfoss actuator AMV 30 Multifunctional control valve AHQM 33 Danfoss actuator AMV 34 Three-way valve VMV 38 PTC2 + P controller 40 Danfoss thermostat for bypass/circulation 29 Danfoss actuator AMV, HE 57 Safety thermostat

Supply limit

HE Supply

HE Return

34 33

DHW

DH return

DH supply

Primary

DKDHR VI.GP.Q3.02 Danfoss District Energy

HE return

HE supply

Secondary DHW

FH supply

FH return

DCW

Instructions for installation and use Akva Lux II VX substations

3.0 Dimensional sketches / connections

Dimensions mm:

Without cover: H 860 x W min. 510 / max. 553* x D 365

With cover: H 861 x W 550 x D 365 H 861 x W 600 ** x D 381

* Units with insulated plate heat exchanger type XB06H-1 40 for both HE and DHW circuits.

** Width of cover for units with insulated plate heat exchanger type XB06H-1 40 for both HE and DHW circuits

Connections sizes:

Akva Lux II VX (thermostatic control)

DH + DCW + DHW + HE: G ¾” (int. thread) Connections, Circ.: R ½” (int. thread)

Substations with XB 0 6L-24 heat exchanger for o or heating are

supplied with connection pipes for radiators for direct connection.

Akva Lux II VX (thermostatic control and optional junction box + zone valve) + Akva Lux II VX (electronic control)

DH: G¾” (ET) DCW, DHW, HE: G¾” (IT) Circ. R½” (ET)

Akva Lux II VX - 1 HE circuit + domestic hot water

Wall

A DB FEC

top view

Connections:

Order:

A. District heating (DH) supply

B. District heating (DH) return C. Heating (HE) return D. Heating (HE) supply E. Domestic hot water (DHW F. Domestic cold water (DCW) G. Connection return H. Connection supply *

Wall

A DB FEC

top view

Connections:

Order: A District heating (DH) supply B District heating (DH) return C Heating (HE) return D Heating (HE) supply E DHW F DCW

Dimensions mm:

Without cover: H 861 x W 650 x D 365

With cover: H 861 x W 700 x D 380

Connections:

Order: 1 District heating (DH) supply 2 District heating (DH) return 3 Heating (HE) return 4 Heating (HE) supply 5 Floor heating (FH) supply 6 Floor heating (FH) return 7 DHW 8 DCW

Connections size:

DH: G¾” (ET) DCW, DHW, HE, FH: G¾” (IT) Circ. R½” (ET)

Akva Lux II VX - 2 HE circuits + domestic hot water

Zirk.

Wall

top view

Danfoss District Energy VI.GP.Q3 .02 DKDHR

Instructions for installation and use Akva Lux II VX substations

4.0 Enduser instructions, General

Instructions

Please read these instructions carefully before installing and commissioning 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 physical injury and/or damage to property. Exceeding the recommended operating parameters 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 electrical 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 VX, which are district heating substations for indirect heating for single-family houses, semi-detatched and terraced houses as well as ats. With one or two heating circuits for radiator and/or oor heating and with instantaneous water heater for domestic hot water heating. For wallmounting and with variable connection possibilities.

The HE supply temperature is controlled either by a self-acting thermostat T°C 200 or AVTB or by a Danfoss ECL controller in combination with an electronic actuator. The ECL controller acts as the brain of the heating system. It lets you easily control and optimize system performance and operation.

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 unit.

Warnings about high pressure and high temperature

The maximum supply temperature in the district heating network can be up to 120°C (130° 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 without delay.

the substations can work temporarily at 130° C

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 effect on the overall energy economy. Therefore, it is important to focus on the supply and return temperature in the heating system. 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 oor heating systems, the supply temperature should not exceed 35°C.

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 situation, the district heating meter will register very modest consumption as the volume of water is very small. On substations with recirculation, the calorie meter registers the heat loss in the recirculation pipe.

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.GP.Q3.02 Danfoss District Energy

Instructions for installation and use Akva Lux II VX substations

5.0 Enduser instructions, Initial adjustment and 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 must never exceed 55°C to prevent limescale deposits building up in the water heater.

Fig. 1

Option: Alternatively the VX substations may be tted with a Danfoss PM2+P controller (Fig. 2) for domestic hot water. Set the DHW temperature by turning the adjuster lever towards red (hotter) or blue (colder). Start by turning the lever clockwise – until the pin is opposite the blue dot. Then turn the lever counter-clockwise until the temperature of the tap water is approx. 48°C during normal tapping ow (7–8 litres per min.). The temperature must never exceed 55°C to prevent limescale deposits building up in the water heater.

Bypass or circulation thermostat

Thermostat (Fig. 3) that keeps the branch pipe warm in the summer or regulates the circulation temperature if domestic hot water recirculation has been established in the hot water system (see pages 20-21 and page 37 for more information). The thermostat should initially be set to position 3.

Heating circuit, Dierential Pressure Controller

The dierential pressure controller (Fig. 1) reduces the high, uctuating pressure in the district heating network to a constant operating pressure. The AVPL 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erential pressure controller to a lower or higher operating pressure. We suggest that you contact your local plumber for assistance. The TD200 dierential pressure controller is preset from factory and should not be adjusted afterwards.

Heating circuit, Temperature control

Thermostatic control

The supply temperature to the substation can be set by adjusting the thermostat TC (Fig. 5), which controls the temperature for the heating circuit. The thermostat will be set by the installer in connection with the com missioning, but it may be necessary to adjust it subsequently depending on the outdoor temperature.

Approximate thermostat scale settings:

Pos. 2 = 30°C 3 = 40°C for range 25-70° C 4 = 50°C 5 = 60°C or

Pos. 2 = 45°C 3 = 55°C for range 35-85° C 4 = 65°C 5 = 75°C

Please note that a label on the TC thermostat will indicate the temperature range (g. 6).

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 temperature.

NB! For houses that are heated exclusively with oor heating. The supply temperature should typically be set to approx. 30–35°C. ALWAYS refer to the instructions from the oor supplier.

Fig. 2

Fig. 3

Fig. 4

TD200AVPL

Fig. 5A

Fig. 6

Range 35-85° CRange 25-70° C

Danfoss District Energy VI.GP.Q3 .02 DKDHR

Instructions for installation and use Akva Lux II VX substations

Alternatively the HE temperature is controlled by a self-acting temperature controller Danfoss AVTB (Fig. 5B). The controller has a control valve, thermostatic actuator and handle for temperature setting. 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. Approximate thermostat scale settings:

1.0 = 35 °C

1.5 = 45 °C

2.0 = 55 °C

2.5 = 65 °C

3.0 = 75 °C

Other variations with other types of thermostatic valves for control of the heating circuit may occur.

Electronic control

The temperature for the heating circuit can be controlled electronically by a Danfoss ECL 110, a Danfoss ECL 210 or a Danfoss ECL 310 controller (Fig. 6). The supply temperature ist calculated by the controller on basis of the outdoor temperature. See the enclosed documentation for same.

Pump. Akva Lux II VX substations are factory tted with a pump (Fig. 7). The pump setting is established in connection with the commissioning. Generally speaking, this setting is not to be altered. If it should nevertheless 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 sections, if necessary.

Fig. 5B

AVTB

Fig. 6

ECL 210 / ECL 310ECL 110

Fig. 7

UPM3 AUTOUPM3 AUTO L

DKDHR VI.GP.Q3.02 Danfoss District Energy

Instructions for installation and use Akva Lux II VX substations

6.0 Installation instructions, Safety and Handling

Instructions

Please read these instructions carefully before installing and comissioning 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 physical 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 recommended chloride content is exceeded.

Safety valve(s)

Installation of safety valve(s) must always be in compliance with local regulations.

Noise level.

≤ 55 dB.

PTC2+P controller for domestic hot water

The controller is preset from factory and sealed with a red sticker. This sealing must not been broken. The warranty becomes void if the sealing is broken.

Storage

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 (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.

Danfoss District Energy VI.GP.Q3 .02 DKDHR

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 equalizer connection to secure against user contact with dangerous voltage, which may occur for example between two piping systems. Potential equalization reduces corrosion in heat exchangers, water heaters, district heating units 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 substation.

Warning of high pressure and high temperature

The maximum supply temperature in the district heating network can be up to 120°C (130°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.

* the substation can work temporarily at130°C.

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.

NB! - Tightening of connections

Before mounting of the substation, ALL pipe connections MUST be retightened, as vibrations during transport may have caused leaks. Once the substation has been put into operation ALL pipe connections MUST be pressure tested for leaks and retightened once more if necessary. DO NOT OVERTIGHTEN THE PIPE CONNECTIONS – see page 14, “Test & connections”.

Handling

We recommend that you wear suitable safety footwear while handling and installing the substation.

1111

Instructions for installation and use Akva Lux II VX 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 instructions in this manual.

If the system features DHW recirculation, a recirculation connection 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 page 20-21.

Commissioning

Please note that from factory the substation is prepared for connection in bottom of the substation.

1. The ball valves, which are supplied loose with the substation, can be mounted either on the top connections or bottom connections. For connection in top, demount the plugs from the top connections and mount them on the bottom connections.

(Please see instruction on page 14 for further information)

2. For connection in TOP for DCW and DHW please note that this includes relocation of the built-in blind plates BEFORE mounting the substation on the wall. (Please see instruction on page 15 for further information).

3. If the household piping system features domestic hot water recirculation, the substation must be connected to the recirculation system. See pages 20-21 for further information about DHW recirculation.

4. The substation is prepared for wall mounting. Mount the substation on a solid wall using two sturdy bolts, screws, expansion bolts or similar.

5. Close all shut-o valves in the substation before connecting it/ them to the household piping.

6. Mount the district heating meter (see page 16).

7. IMPORTANT! Tighten all pipe connections, as they may have loosened during transport and handling.

8. On systems that feature a safety valve, establish a drain connection in compliance with the applicable legislation.

9. Fill the heat exchanger / the system with water according to the instructions on pages 18 and 19 until the manometer shows a working pressure, which corresponds to the system height + approx. 5 m (approx. 1.2 - 1.5 bar).

12. Pressure test the entire system for leaks in accordance with the applicable regulations.

13. Connect pump and automatic components, if any, to the electricity supply, but do not switch on the power.

14. Heat the system and vent the radiator circuit/heating side thoroughly on the radiators and the air valve, if any.

15. For substations, which include zone valve, remember

to remove the red split on the position indicator of the zone valve.

16. Now switch on the pump and automatic components, if any.

10. Finally open the ball valve for the DH supply and return ow and heat up the system.

11. Check the substation and the household piping thoroughly for leaks.

DKDHR VI.GP.Q3.02 Danfoss District Energy

17. Finish by adjusting the substation in accordance with the instruction manuals.

Heating and cooling the substation may cause leaks. Therefore it may be necessary to retighten the connections in the period after commissioning.

Instructions for installation and use Akva Lux II VX substations

8.0 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 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 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 instructions in this manual.

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 overtightening or failure to retighten connections are not covered by the warranty.

Variable connections possibilities

The Akva Lux II VX substations oer variable connection possibilities, as connections of pipes can be established in the top or in the bottom of the substation. - Upon delivery the substation is prepared for connction in bottom of the substation. Please note that the ball

valves are supplied loose and must be mounted on site.

For change of connection from bottom to top, demount plugs on connection pipes in top of substation and ball valves on connection pipes in bottom of substation, and mount plugs in connection pipes in bottom of substation and ball valves on connection pipes in top of substation.

These variable connection possibilities makes it possible to establish some of the connections in the top and others in the bottom of the substation. This may be desirable in some cases.

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Instructions for installation and use Akva Lux II VX substations

PLEASE NOTE!

Remember to use gaskets when establishing connection in top of unit.

DCW

If there is a need for a domestic cold water outlet in top of the unit, remove the blind plate in pos. A and demount the plug in top of the unit.

For DCW inlet in top of the unit, remove the plug in top of the unit and the blind place in pos. A. Mount the ball valve in top and use the plug for plugging in the bottom (remember gaskets).

DHW

For DHW outlet in top of the unit, remove the blind plate and gasket from Pos. B and relocate to Pos. C - see photos to the right. The blind plate should be installed in Pos. C to prevent a pocket of standing water that at worst can produce dangerous bacteria. Therefore, it is extremely important to install the blind plate as shown. Also move the plug from the top connection to the DHW outlet in the bottom of the unit and mount the ball valve in top (remember gaskets).

DHW both up and down The unit can be connected with piping both up and down for the domestic hot water. Remove blind plate in pos. B and plug in top of unit.

DCW

DHW

Demount blind plate

Heating (HE)

The unit can be connected with piping both up and down on the heating side. Remove the plugs in top of unit, and establish connection upwards.

Expansion vessel

The Akva Lux II VX substations are equipped with an expansion vessel, which is factory set to 0,5 bar.

DHW

Demount blind plate

Mount blind

plate here

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Instructions for installation and use Akva Lux II VX substations

Fitting piece(s) for heat meter(s).

The Akva Lux II VX substations are equipped with tting piece(s) for heat meter in both DH supply and return (leak detection) or only in DH return.

The tting piece(s) can be either exible size 3/4 x 110 - 165 mm or xed size 3/4” x 110 mm.

Variations with other dimensions may occur.

Fitting of heat meter in substation with exible tting piece size 3/4 x 110 - 165 mm

Fitting of heat meter in DH return - (Fig. 1)

The heat meter can easily be tted on site as follows:

- Close the ball valves on the district heating and the heating lines.

- Loosen the union nuts at both ends of the nipple pipe 24 remove nipple pipe 24

and insert heat meter and tighten

- do not forget gaskets.

- For heat meters with an overall length of more than110 mm the exible tting pipe 24

must be loosened and displaced,

so that it corresponds to the size of the heat meter.

- Tighten union nut/locknut.

- After mounting of heat meter remember to check and tighten all pipe connections before commissioning the heat meter.

For tting of heat meter in DH supply (Fig. 2) please follow the above instructions.

For tting of heat meter in both DH supply and return, please follow the above instructions.

Fig. 1

Loosen union nut/locknut and the exible pipe 242 is adjustable from 110 to 165 mm.

Fig. 2

Loosen union nut/locknut and the exible pipe 242 is adjustable from 110 to 165 mm.

Fig. 3

Fitting of heat meter(s) in substation with xed tting piece size 3/4 x 110 mm

Fitting of heat meter(s) - (Fig. 3)

The heat meter can easily be tted on site as follows:

- Close the ball valves on the district heating and the heating lines.

- Loosen the union nuts at both ends of the tting piece13b and remove it.

- Fit the heat meter, - remember to insert gaskets.

- After mounting of heat meter remember to check and tighten

all pipe connections before commissioning the heat meter.

Mounting of temperature sensor

As standard the heat meter is supplied with temperature sensors for measuring the supply and return ow temperatures.

The Akva Lux II VX substations are prepared for mounting of temperature 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. C) or in the sensor pocket on DH return (pos. B).

13b

Fig. 4

Pipe bushing ½”/M10x1 incl. plug M10

Please note: Some variant are supplied with ½” plug.

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