Danfoss VXe Solo Indirect Fully Insulated District Heating Substation User Manual

: June 9, 2024
: Danfoss

Table of Contents

VXe Solo Indirect Fully Insulated District Heating Substation
References
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VXe Solo Indirect Fully Insulated District Heating Substation

Instructions for installation and use
Indirect, fully insulated district heating substation VXe Solo
District heating substation for indirect heating and connection pipes for domestic hot water.
VXe Solo
Fully insulated for very low heat losses.
www.danfoss.com

Instructions for installation and use

VXe Solo

VXe Solo H ECL 310/A230

VXe Solo HWP ECL 310/A337

VXe Solo HWS ECL 310/A237

VXe Solo H OP ECL 310

1.0 Content
2.0 Installation instructions, safety and handling……………………………………………………………………………………………………………………………………………3 3.0 Getting started – Quick guide for easy start- up…………………………………………………………………………………………………………………………………………5 4.0 Main components / Connections ………………………………………………………………………………………………………………………………………………………………..7 5.0 Diagram, Dimensional sketch, Example………………………………………………………………………………………………………………………………………………….. 10 6.0 General, Mounting of heat meter and safety valves……………………………………………………………………………………………………………………………… 15 7.0 Filling the system with water ……………………………………………………………………………………………………………………………………………………………………. 16 8.0 Electrical connections………………………………………………………………………………………………………………………………………………………………………………… 17 9.0 Adjustmend and commissioning …………………………………………………………………………………………………………………………………………………………….. 18 10.0 Heating circuit, Danfoss ECL 310 automatics…………………………………………………………………………………………………………………………………………. 19 11.0 Control of heating circuit…………………………………………………………………………………………………………………………………………………………………………… 20 12.0 Heating circuit, pump ………………………………………………………………………………………………………………………………………………………………………………… 22 13.0 Domestic hot water, Cylinder circuit ……………………………………………………………………………………………………………………………………………………….. 24 14.0 Maintenance / Supervision ……………………………………………………………………………………………………………………………………………………………………….. 27 15.0 Troubleshooting …………………………………………………………………………………………………………………………………………………………………………………………. 29 16.0 EU Declaration of conformity……………………………………………………………………………………………………………………………………………………………………. 32 17.0 Commissioning Certificate………………………………………………………………………………………………………………………………………………………………………… 34 18.0 Guidelines for water quality in Danfoss brazed heat exchangers……………………………………………………………………………………………………. 35

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2. 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 qualified 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 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 off from access.
Choise of materials Only use materials, that comply with local regulations.
Corrosion protection
The risk of equipment corrosion increases considerably if recommended permissible chloride compounds are exceeded. All pipes are made of min. AISI 304 (heating) and min. AISI 316 (domestic water) stainless steel as well as brass. Components for domestic water, however, primarily in dezincification- resistant brass. Heat exchangers are made of stainless steel and are copper- soldered or steel-soldered. Surfaces in contact with water can be subject to two problems, limescale formation and corrosion. The nature of the water will be of great importance in this context, where the pH value, chlorides, gases, etc., have a decisive effect on how much lime is deposited and how aggressive the water is. The temperature also has a great influence in this context. For example the corrosion rate increases by a factor of 2 to 3 for every 10° C temperature rise. With knowledge of the chemical water composition and operating conditions of a heating system, the risk of scaling and corrosion can be assessed. Based on that, recommendations can be made to avoid scaling and/or corrosion problems in the components.
See item 18, page 35 for more detailed Guidelines for Water Quality in Danfoss brazed heat exchangers and recommended Chloride concentration to avoid Stress Corrosion Cracking.
Safety valve(s) Installation of safety valve(s) must always be in compliance with local regulations.
Noise level. 55 dB.
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.
Connection It must be possible to cut off all energy sources to the unit – including electrical connections – at all times. The unit must be connected to an electrical equalizer connection.
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 and the operating pressure can be up to 16 bar. This may result in a risk of scalding from touching the substation and from outflow 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 fire, leaks or other hazards, immediately shut off all sources of energy to the substation, if possible and call for appropriate assistance. If the domestic hot water is discoloured or malodorous, shut off 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 filled and the system has been put into operation, ALL pipe connections MUST be tightened once more. (Do not overtighten! – See page 15, Test and Connections)
Handling We recommend that you wear suitable safety footwear while handling and installing the substation.
NOTE: Interventions/rework on our components results in loss of warranty.

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2. INSTALLATION INSTRUCTIONS, SAFETY AND HANDLING
Reach All products of the Akva Lux II Triiiple series comply with the provisions of the REACH regulation. We are therefore obliged to inform our customers about the presence of substances according to the SVHC candidate list, if they are present. We hereby inform you: This product contains brass parts containing lead (CAS 7439-92-1) in a concentration above 1% (w/w).

Potential equalization / grounding
Equipotential bonding is understood as all measures for eliminating electri- cal potential differences (contact voltages), which can occur between eg two pipelines. Equipotential bonding is an important measure for protec-tion against electric shock. Equipotential bonding reduces corrosion in the heat exchanger, instantaneous water heaters, district heating stations and plumbing installations. Equipotential bonding should be in accordance with the provisions 60364-4-41: 2007 and IEC 60364-5-54: 2011. Binding point is marked with a grounding symbol on the bottom right corner of the mounting plate and there is a hole in the mounting plate and a label with grounding symbol.

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.

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3. GETTING STARTED – QUICK GUIDE FOR EASY START-UP

Mounting
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.

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.
GETTING STARTED VXe Solo 1. Mount the substationon a solid wall using two sturdy bolts (max. 8 mm), screws, expansion bolts or similar. 2. Tighten all pipe connections, as they may have loosened during transport and handling. 3. Mount the district heating meter (see page 15. 4. On systems that feature a safety valve, establish a drain connection in compliance with the applicable legislation. 5. Fill the heat exchanger / the system with water according to the instructions on page 16. 6. Open the ball valve for the HE supply and return flow and heat up the system. 7. Check the substation and the household piping thoroughly for leaks. 8. Pressure test the entire system for leaks in accordance with the applicable regulations. 9. Connect pump and automatic components, if any, to the electricity supply, but do not switch on the power. 10. Heat the system and vent the radiator circuit/heating side thoroughly on the radiators and the air valve, if any. 11. Connection Now switch on the pump and automatic components, if any. 12. Finish by adjusting the substation in accordance with the instruction manuals and remember to fill out the Commissioning Certificate page 34.

Primary

Secondary

DHW

Note! Heating and cooling the substation may cause leaks. Therefore it may be necessary to retighten the connections in the period after commissioning.
Note! Never lift the station by its front insulation cover!

DH supply DH return HE return HE supply Cylinder supply Cylinder return

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3. GETTING STARTED – QUICK GUIDE FOR EASY START-UP

Start-up: See page 5 ” Getting started”
Diagram examples: See page 11 – 14
Main components. See page 7 – 10
Mounting / Mounting of heat meter: See page 15
Safety valves: See page 15
Electrical connection: See page 17 Outdoor sensor: Connect to terminal block U
Filling the system with water: See page 16
Commissioning: See page 18-26
Reading of meter: Consumption and actual DH temperatures can be read on the meter display, placed under the ECL controller.
Temperatures: To be read on thermometers (Pos. no. 13)
Pressure: To be read on manometer (Pos. no. 15)
Connections: Pos. no’s 7A (DH), 7B (HE), 7C (DHW)

U
Meter display
15

13

7A

7B

7C

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4. MAIN COMPONENTS / CONNECTION- VXE H SOLO 310/A237

1 Plate heat exchanger HE, with insulation 5 Strainer 7 Ball valve 8 Circulation pump HE 11 Safety valve HE 13 Thermometer 14 Pocket for pressure gauge 15 Manometer 16 Expansion vessel 23 Sensor pocket for heat meter 24 Fitting piece for heat meter ¾” x 110 mm 25 Controller Danfoss ECL310/A230 29 Danfoss actuator AMV 30 Flow controller with integrated control valve AVQM —————————————————————————Option: 54 Safety thermostat, Jumo AT

25 17
1 5
23 29

Accessories available as extra equipment (mounting on site)
KFE tap – Code No. 145H3717 For filling and draining 1/4″.

30 23
13
7

8 15 24 24

16
11 14

DH supply DH return HE return HE supply

Primary

Secondary

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4. MAIN COMPONENTS / CONNECTION- VXE SOLO HWP ECL 310/A337

1 Plate heat exchanger HE, with insulation

4 Differential pressure controller

and flow limiter AVPB-F

5 Strainer

7A Ball valve ¾ ET/ET 120 mm for

thermometer/manometer

7B Ball valve ¾ IT/ET 120 mm for

thermometer

8 Circulation pump, HE

11 Safety valve HE, 3 bar ½”

13 Thermometer

17

14 Pocket for pressure gauge

15 Manometer

16 Expansion vessel 12 l

23 Sensor pocket for heat meter

24 Fitting piece for heat meter

3/4″ x 110 mm

25 Controller Danfoss ECL310/A337

29 Danfoss actuator AMV

30 Two-way valve VS2

————————————————–

Option:

54 Safety thermostat, Jumo AT

24

Accessories available as extra equipment (mounting on site)
Thermostatic valve RAVK/VMA for DHW Code No. 144B2021

25

1
23
5 29 30 23 13

16

4

8 15 15 24

11

14

7B

7A

7B

DH supply DH return HE return HE supply Cylinder supply Cylinder return

Primary

Secondary

DHW

54

8 | © Danfoss | Produced by Danfoss Redan A/S | 2023.02

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4. MAIN COMPONENTS / CONNECTION- VXE SOLO HWS ECL 310/A337

1 Plate heat exchanger HE, with insulation 5 Strainer 6 Non-return valve 7 Ball valve 8A Circulation pump, HE 8B Circulation pump, cylinder 11 Safety valve HE, 3 bar ½” 13 Thermometer 14 Pocket for pressure gauge 15 Manometer 16 Expansion vessel 12 l 23 Sensor pocket for heat meter 24 Fitting piece for heat meter
3/4″ x 110 mm 25 Controller Danfoss ECL310/A337 29 Danfoss actuator AMV 30 Danfoss flow controller with integrated control valve AVQM ————————————————————————————–Option: 54 Safety thermostat, Jumo AT
Accessories available as extra equipment (mounting on site)
KFE tap – Code No. 145H3717 For filling and draining 1/4″
Thermostatic valve RAVK/VMA for DHW Code No. 144B2021

16 17
25

1 54 1
5 29 15
6 30 8A 2323 24
13 7

6
8B 13
1114 5

DH supply DH return HE return HE supply Cylinder supply Cylinder return

PLEASE NOTE! As an option VXe Solo HWS can be supplied with Danfoss flow controller with integrated control valve AHQM instead of AVQM.

Primary

Secondary

DHW

16 25

54 1

5 29 15
6 8A 23 30 23 24
13 7

6
8B 13
11 5 14 14

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4. MAIN COMPONENTS / CONNECTION – VXE H OP ECL 310

1 Plate heat exchanger HE 5 Strainer 7 Ball valve 11 Safety valve HE 13 Thermometer 14 Pocket for pressure gauge 15 Manometer 16 Connection for expansion vessel 23 Sensor pocket for heat meter 24 Fitting piece for heat meter ¾” x 110 mm 25 Controller Danfoss ECL310/A230 26 Outdoor sensor, ESMT 27 Sensor, ESMC 29 Danfoss actuator AMV 30 Flow controller with integrated control valve AVQM

25 17
1
29 23 55

Accessories available as extra equipment (mounting on site)
KFE tap – Code No. 145H3717 For filling and draining 1/4″.

VXe Solo H OP

Code No.

Type 1, Cover

145F0620

Type 2, Cover

145F4438

Type 2, Cover, STW*

145F4454

*Safety function = AMV13 / Jumo Safety Thermostat

5
3023 23 13
7

30
248 24 16 24

11 11
14

DH supply DH return HE return HE supply

Primary

Secondary

10 | © Danfoss | Produced by Danfoss Redan A/S | 2023.02

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5. DIAGRAM & DIMENSIONAL SKETCH, EXAMPLE – VXE SOLO H ECL310/A230

1 Plate heat exchanger HE 5 Strainer 7 Ball valve 8 Circulation pump HE 11 Safety valve HE 13 Thermometer 14 Pocket for pressure gauge 15 Manometer 16 Expansion vessel 23 Sensor pocket for heat meter 24 Fitting piece for heat meter ¾” x 110 mm 25 Controller Danfoss ECL310/A230 26 Outdoor sensor , ESMT

27 Sensor, ESMC 29 Actuator AMV 30 Flow controller with integrated control valve AVQM —————————————–Option:
Safety thermostat, Jumo AT

DH Supply
DH Return

1

2

3

4

A

B

785 660

C

D 65 100 80 80 550

E
Connections: 1. District heating (DH) supply 2. District heating (DH) return 3. Heating (HE) return 4. Heating (HE) supply
F

1

2

3

AQ373475147162en-010102

55 4

HE Supply
HE Return

5

6

7

8

POS.

1

2

A

3

4

5

6 7 8 9 10
B 11
12 13 14 15 16

17

18

C

19 20

21

22 23

24 25

315

26 27
D
28 29

30 31 32

33

34

E

35

36

General tolerance accuracy, measurements without tolerance:

Projection

Scale

Size

Material

37

ISO 2768 – mK

38

Weight

58.006 kg

1:6

A3

Danfoss Standard

39

Replace

Design

17-09-2020

JJ

Designation

40

VXe Solo

41

Approval

42

Danfoss Redan A/S

F 43

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.

No. 145F4440 Rev.

44

Sheet 1 / 1

45

5

6

7

8

46

49

50 51

Instructions for installation and use

VXe Solo

5. DIAGRAM & DIMENSIONAL SKETCH, EXAMPLE – VXE SOLO HWP ECL 310/A337

Cylinder

Supply limit Cylinder Supply

1 Plate heat exchanger HE, with insulation
4 Differential pressure controller and flow limiter AVPB-F
5 Strainer 7A Ball valve ¾ ET/ET 120 mm for
thermometer/manometer 7B Ball valve ¾ IT/ET 120 mm for
thermometer 8 Circulation pump, HE
11 Safety valve HE, 3 bar ½”

13 Thermometer 14 Pocket for pressure gauge 15 Manometer 16 Expansion vessel 12 l 23 Sensor pocket for heat meter 24 Fitting piece for heat meter
3/4″ x 110 mm 25 Controller Danfoss ECL310/A337 26 Outdoor sensor, ESMT 27 Sensor Danfoss, ESMC 29 Danfoss actuator AMV 30 Two-way valve VS2 —————————————–Option: 54 Safety thermostat, Jumo AT

Cylinder Return

DH Supply
DH Return

HE Supply
HE Return

1

2

3

4

A

B

C

D 65 100 80 80 80 80 550

E

Connections:

1. District heating (DH) supply

2. District heating (DH) return

3. Heating (HE) return

4. Heating (HE) supply

F

5. Cylinder supply 6. Cylinder return

1

2

3

4

12 | © Danfoss | Produced by Danfoss Redan A/S | 2023.02

785 660

5

6

7

8

POS.

Q

1

2

A

3

4

5

6 7 8 9 10
B 11
12

13

14 15 16

17 18

C 19
20 21 22 23

24

25 26

55 315

27
D 28

29

30

31

3

32

33 34 35
E 36

General tolerance accuracy, measurements without tolerance:
ISO 2768 – mK

Weight

61.068 kg

Replace

Design

02-11-2016

JJ

Approval

Projection

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.

5

6

37

Scale

Size

Material

38

1:6

A3

Danfoss Standard

39

Designation

40

VXe Solo

41

42

Danfoss Redan A/S
No. 145F4445

F

43

44

Rev.

Sheet 1 / 1

45

7

8

46

AQ373475147162en-010102

47 48

49

50

51

Instructions for installation and use

VXe Solo

5. DIAGRAM & DIMENSIONAL SKETCH, EXAMPLE – VXE SOLO HWS 310/A337

1 Plate heat exchanger HE,

25 Controller Danfoss

with insulation

ECL310/A237

5 Strainer

26 Outdoor sensor, ESMT

6 Non-return valve

27 Sensor Danfoss, ESMC

7 Ball valve

28 Immersion sensor ESMB

8A Circulation pump, HE

29 Danfoss actuator AMV

8B Circulation pump, cylinder 30 Danfoss flow controller with

11 Safety valve HE, 3 bar ½”

integrated control valve

13 Thermometer

AVQM

14 Pocket for pressure gauge

15 Manometer

16 Expansion vessel 12 l

23 Sensor pocket for heat meter

24 Fitting piece for heat meter

3/4″ x 110 mm

Supply limit
Cylinder Return
Cylinder Supply

Cylinder

DH Supply

HE Supply

DH Return

HE Return

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

A

B

C

D

912

E

F

G

55

H

65

100

80

315

H

550

J

Connections:

1. District heating (DH) supply

K

2. District heating (DH) return

K

3. Heating (HE) return

4. Heating (HE) supply

L

5. Cylinder supply

6. Cylinder return

L

General tolerance accuracy, measurements without tolerance:
ISO 2768 – mK

Weight

73.118 kg

Replace

Projection

Scale
1:3

Size

Material

A1

Danfoss Standard Designation

Design

30-10-2018

JJ

Approval

M

Danfoss Redan A/S

M

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.

No. PROTO 897 Rev.

Sheet 1 / 1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

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5. DIAGRAM & DIMENSIONAL SKETCH, EXAMPLE – VXE SOLO H OP ECL 310

1 Plate heat exchanger HE 5 Strainer 7 Ball valve 11 Safety valve HE 13 Thermometer 14 Pocket for pressure gauge 15 Manometer 16 Connection for expansion vessel 23 Sensor pocket for heat meter 24 Fitting piece for heat meter ¾” x 110 mm 25 Controller Danfoss ECL310/A230 26 Outdoor sensor, ESMT
DH Supply

27 Sensor, ESMC 29 Danfoss actuator AMV 30 Flow controller with integrated control valve AVQM

HE Supply

DH Return

HE Return

1

2

3

4

5

6

7

8

9

10

11

12

A

B

C

660 125

D

E

65 100 80 80 F
550

315 55

G

Anschlüsse:

1. Fernwärme (FW) Vorlauf

2 Fernwärme (FW) Rücklauf

3. Heizung (HE) Rücklauf

4. Heizung (HE) Vorlauf

H

1

2

3

4

5

6

7

14 | © Danfoss | Produced by Danfoss Redan A/S | 2023.02

E

F

G

General tolerance accuracy, measurements without tolerance:
ISO 2768 – mK

Weight

64,398 kg

Replace

Design

07-12-2016

JJ

Projection

Scale
1:5

Size

Material

A2

Danfoss Standard

Designation
VXe Solo

Approval

Danfoss Redan A/S

H

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.

No. 145F4439 Rev.

Sheet 1 / 1

8

9

10

11

12

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6. GENERAL, MOUNTING OF HEAT METER AND SAFETY VALVES

General
The installation, connection and maintenance of the substation must be performed by qualified and authorised personnel. Installation must always be performed in accordance with the applicable legislation and in compliance with these instructions. The substation must be installed so that it is freely accessible and can be maintained without unnecessary disruption. Lift the substation by its mounting plate/rear section and secure it to a solid wall using 4 sturdy bolts (max. 8 mm), screws or expansion bolts positioned in the four keyholes. 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.

For fully insulated systems
The insulation front panel on the VXe Solo substations can be removed without using tools. Take hold of the air duct in the top and bottom of the front insulation section and pull carefully forward until the front insulation section releases from the rear section. Then pull gently until the front section is free from the components.

Test and connections
Before filling 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 filled 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 may feature EPDM rubber gaskets! Therefore, it is important that you DO NOT OVERTIGHTEN the union nuts. Overtightening may result in leaks. Leaks caused by overtightening or failure to retighten connections are not covered by the warranty.

Meter display

Heat meter, fitting pieces.
The substation is equipped with fitting pieces for heat meter on the district heating return line. (Measurement: 3/4″ x 110 mm).

Fitting of heat meters
– Close the four ball valves on the district heating and the heating sides.
– Loosen the union nuts at both ends of the fitting piece (A + B) and remove it.
– Fit the heat meter, – remember to insert gaskets. – Mount sensor, – remember to insert gaskets. – Mount temperature sensors in sensorpockets (according to
heat meter instructions. – After mounting of heat meter remember to check and tighten
all pipe connections before commissioning the substation.

A

B

Meter display (reading unit)
The meter reading unit is placed on the console together with the ECL regulator, as shown in the photo to the right, so that reading of the meter can be done without removing the insulation cover.

Safety valve(s) Always lead the blow-off pipe from the safety valve to a drain in accordance with applicable legislation.
The insulation cover is be prepared for this and blow-off pipe from the safety valves are led through the slit in the insulating cover as shown in the photo to the right.

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7. FILLING THE SYSTEM WITH WATER
Test and connections Before filling 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 filled 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.
Filling, start-up Before filling the system with water, retighten all the pipe connections. Once the system has been filled with water, tighten all the pipe connections once more before performing pressure test for leaks. Before filling the system with water and starting-up, check if:
– pipes are connected according to the circuit diagram, – expansion vessel is connected, – heat meter is mounted, – shut-off valves are closed, – threaded and flanged connections are tightened, – recirculation, if any, has been established.

Filling the heat exchanger / the system with water: · The pump must be switched off when filling the system with
water.
· Open the ball valves for the HE supply and return flow and fill the system with water and at the same time venting the system.
· Fill the heat exchanger / the system with water until the manometer shows a working pressure, which corresponds to the system height + approx. 5 m (approx. 1.2 – 1.5 bar).
· Finally open the remaining ball valves and heat up the system.
· After filling and heat-up of the system it should be vented by means of the air vents on the substation, if any and on the radiators.
· Then switch on the pump.

Note: There is no filling valve inside the station. For refilling use a refill hose, customary for heating systems. Filling of water to the heating system must be done outside the substation, typically by connection to a cold water supply in the household installation.
NOTE: Accessories available as extra equipment (mounting on site) KFE tap – code No. 145H3717 For filling and draining 1/4″

16 | © Danfoss | Produced by Danfoss Redan A/S | 2023.02

Manometer AQ373475147162en-010102

Instructions for installation and use

VXe Solo

8. ELECTRICAL CONNECTION
Electrical connection The electrical connection of the substation must be performed by a qualified 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 wired and connected to an external main switch so that it can be disconnected during maintenance, cleaning and repairs or in the event of an emergency.
Do not forget to establish potential equalization.
The VXe Solo are delivered with Danfoss ECL Comfort 310 controllers from factory. The actuator and sensors are mounted in the station. The controller is built into the console at the top of the station.
The station is wired and tested in the factory. Electrical connections between the controller, pump(s), sensor and actuator(s) are made.
Mounting of outdoor temperature sensor (ESMT) 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, where it is less likely o exposed to direct sunshine (normally the north side of the property). The sensor must not be exposed to the morning sun, and should not be placed 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 The cables can be connected to the sensor in any order. Connection cable: 2 x 0.4 – 1.5 mm²
For ECL 310: Connect the cable ends to ECL controller in common ground terminal and in terminal 29.
Access to ECL base part Access to the base part for connection of outdoor sensor or the like is obtained by pulling the lock (pin) down with a screwdriver until a yellow line is visible on the lock. Then, the front piece can easily be removed. Lock by pressing the lock (pin) up.

Controller ECL Comfort 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 AMV 150

Supply voltage:

230 V a.c. – 50 Hz

Power consumption:

2 / 8 VA

For further information please see enclosed instruction manual.

Pumpe UPM3 AUTO Supply voltage: Protection class: Power consumption:

230 V a.c. – 50 Hz IP44 Max. 52 Watt

For further information please refer to the enclosed instructions for the circulation pumps.

Lock / pin

AQ373475147162en-010102

Common ground terminal
ECL Comfort 210 bundpart
© Danfoss | Produced by Danfoss Redan A/S | 2023.02 | 17

Instructions for installation and use

VXe Solo

9. ADJUSTMENT AND COMMISSIONING
General information PLEASE NOTE! Some models may have a slightly different appearance, but the control function is in principle the same as described below.
Commissioning Commission the substation in accordance with the instruction manual.
Filling the system / operating pressure Fill the unit with water according to the instructions on page 16. If the pressure drops below 1 bar, water must be added to the system. The operating pressure should never exceed 1.5 bar. (The safety valve opens at 2,5 bar).
The pressure is read on the manometer.
If system pressure drops dramatically within a short time, heating system should be examined for leakage, – this includes checking the factory set pressure of the expansion vessel, which is normally 0,5 bar.

Fig. 1

Differential pressure controller
The differential pressure controller reduces the high, fluctuating pressure in the district heating network to a constant operating pressure.

Fig. 2

VXe Solo H (Fig. 1)
For VXe Solo H the differential pressure controller is installed in the AVQM self-acting flow controller with integrated control valve. Please see page 20 and relevant instruction manual.

VXe Solo HWP (Fig. 2) VXe Solo HWP is supplied with a AVPB-F differential pressure controller, which is preset from factory and should not be adjusted afterwards. The controller has a control valve with adjustable flow restrictor and flow setting is being done by the adjustment of the flow restrictor position. We suggest that you contact your local plumber for assistance. Please see page 20 and relevant instruction manual.
VXe Solo HWS (Fig. 3) For VXe Solo HWS the differential pressure controller is installed in the AVQM self-acting flow controller with integrated control valve. Please see page 20 and relevant instruction manual.

Fig. 3

AVQM Manometer
AVPB-F Manometer

18 | © Danfoss | Produced by Danfoss Redan A/S | 2023.02

AVQM Manometer
AQ373475147162en-010102

Instructions for installation and use

VXe Solo

10. HEATING CIRCUIT, DANFOSS ECL 310 AUTOMATICS

Weather-compensated control of the heating circuit
Danfoss ECL 310
The temperature for the heating circuit is controlled electronically by the Danfoss ECL controller. The supply temperature ist calculated by the controller on basis of the outdoor temperature. The ECL Comfort controller is loaded with a selected application by means of an ECL Application Key (Plug-&-Play). The Application Key contains information about application, languages and factory settings. Various applications can be loaded by means of the ECL Application Key, and it is possible to update the controller with new application software. The controller is factory preset to turn off the heating automatically in the summer period. The controller settings can be changed in accordance with the enclosed producer instructions for the mounted controller.

The controller is pre-programmed (normally) with the following factory settings: · Language = English, · Operating mode of the controller = Comfort “Sun” Symbol, · Application type = A230 / A337 / A237 Motor speed and motor protection is set and the controller is functional is functionally tested, so it’s ready for use.

Start-up of ECL 310 (easy start-up)
When the outside temperature sensor is properly installed and electrically connected to the controller as described in the instructions on page 15, proceed as follows: 1. Connect the controller and switch it on, 2. Choose MENU’ in any circuit – Confirm and turn the dial and chooseCommon controller settings’ in the circuit selector at the top right corner in the display,
(You navigate in the controller by turning the dial left or right to the desired position.
The position indicator in the display ( ) will always show you where you are).
3. Turn dial to select time and date, Push the dial to confirm the selection
4. Select time and date, 5. The controller is now ready for use. Set heat curve and
temp. max. according to the procedure described below.

Setting / change of factory settings:
6. Choose MENU’ in any circuit – Confirm and turn the dial and choose Heating circuit’in the circuit selector at the top right corner in the display (radiator symbol),
7. Then turn the diall and choose Settings’ and confirm by pushing the dial. Then chooseFlow temperature’ and here you set `Heat curve'(value), according to the actual system type, including”Temp. max.”,
8. Typical setting ranges:

Heating circuit one-string two-string Floor heating

Temp. max.

70-90°C

55-65°C

35-40°C

Heat curve

1,0 – 1,75

0,8 – 1,0

0,1 – 0,5

Note; in systems that feature only floor heating the max. supply temperature must be changed according to the above mentioned information.

If increased heat demand occurs during the heating period, the controller settings can be changed

See ECL Application Key Box with ECL Comfort 210/310 user guide and mounting guide, for further information.

Turn the dial to choose ‘MENU’ and press to confirm selection
Circuit selector Choose this symbol to enter `Common controller settings”
Circuit selector Heating circuit

AQ373475147162en-010102

5 5

Instructions for installation and use

VXe Solo

11. CONTROL OF HEATING CIRCUIT

Actuator and valve, VXe Solo H For controlling the heating circuit

the

VXe

Solo

H,

VXe

Solo

HWS

and –

VXe Solo H OP are supplied with a self-acting flow controller with

integrated control valve Danfoss AVQM and a Danfoss AMV actuator

placed in the primary return flow line. The AMV actuator is electrically

wired to the controller from the plant.

The control valve closes on rising differential pressure and opens on

falling differential pressure to control max flow. The controller closes

when set max. flow is exceeded.

In the combination with the electrical actuator AMV and ECL electronic controller the flow and temperature can be controlled to achieve highest energy savings. The AVQM is equipped with excess pressure safety valve, which protects control diaphragm for flow control from too high differential pressure.

AMV 150 The actuator has undergone a functional test and is preset from factory. In the event of operating disturbances the actuator can be shut off manually by turning the manual override knob on top of the actuator clockwise. Please note that the knob can be “tight” to turn.
AMV 13 The actuator has undergone a functional test and is preset from factory. Depending on the selected setting of the safety function, the AMV 13 valve is fully opened or closed when the voltage supply is switched off.

For additional information see manuals for: Self-acting flow controller with integrated control valve and actuator AVQM Electronic actuator AMV 150 Electronic actuator AMV 13

Actuator and valve, VXe Solo HWP For controlling the heating circuit the VXe Solo HWP is supplied with a Danfoss AMV 150 / AMV 13 actuator and a Danfoss two-way motorized contral valve VS 2, placed on the primary return flow line. The AMV actuator is electrically wired to the controller from factory.
The actuator has undergone a functional test and is preset from factory.
In the event of operating disturbances the AMV 150 actuator can be shut off manually by turning the manual override knob on top of the actuator clockwise. Please note that the knob can be “tight” to turn.
Depending on the selected setting of the safety function, the AMV 13 valve is fully opened or closed when the voltage supply is switched off.

AVQM

AMV 150 Manual override

AMV 13

Press and hold the button (on the bottom side of the actuator) during manual operation.

Instructions AVQM, AVQMT PN 16, 25 / DN 15-50

AVQM (PN 16)

AVQM (PN 25)

AVQMT (PN 25)

AVQMT/AVT (PN 25)

DN 15-32 p = 0.2

DN 15-50 p = 0.2

DN 32-50 p = 0.2

DN 15-50 p = 0.2

DN 32-50 p = 0.2

DN 15-50 p = 0.2

DN 32-50 p = 0.2

ENglIsh DANsK DEUTsCh EsPAÑOl slOVENSCINA POlsKI MAgyAr srPsKI

Flow (and temperature) controller with integrated control valve AVQM, AVQMT
Flow- (og temperatur-)regulator med indbygget motorventil AVQM, AVQMT
Volumenstrom (und Temperatur-) Regler mit Motorstellventil AVQM, AVQMT
Regulador de caudal (y temperatura) con válvula de control integrada AVQM, AVQMT
Regulator pretoka (in temperature) z regulacijskim ventilom AVQM, AVQMT
Regulator przeplywu (i temperatury) z zaworem regulacyjnym AVQM, AVQMT
Térfogatáram(és hmérséklet) szabályozó, motoros szabályozó-szeleppel egybeépítve AVQM, AVQMT

www.danfoss.com www.danfoss.dk www.danfoss.de www.danfoss.es www.danfoss.si www.danfoss.pl www.danfoss.hu

Page 7 Side 9 Seite 11 Página 13 Stran 15 Strona 17 Oldal 19

Uputstvo AVQM, AVQMT-PN 16, 25/DN 15-50

grejanje.danfoss.com Strana 21

Instructions AMV 150

ENglIsh DANsK DEUTsCh sVENsKA NEDERlANDs lIETUVI K. lATVIsKI MAgYAR CEsKY POlsKI

AMV 150 + VS2 (DN 15)

AMV 150 + VMV

AMV 150 + AVQM (DN 15)

Actuators for three point control AMV 150 Motorer til 3-punkts styring AMV 150 Stellantriebe für 3-Pkt.- Eingangssignal AMV 150 Motor för 3-punktsreglering AMV 150 Servomotor met 3-puntssturing AMV 150 Pavaros trij padci valdymui AMV 150 Motori trs punktu kontrolei AMV 150 Szelepmozgatók hárompontos szabályozáshoz AMV 150 Servopohony s tíbodovým regulacním signálem AMV 150 Silowniki sterowane sygnalem 3-punktowym AMV 150 AMV 150

www.danfoss.com

Page 2

www.danfoss.dk

Side 3

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Seite 3

varme.danfoss.se

Sida 4

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Lpp. 5

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VS 2

AMV 150

Manual override

AMV 13

Press and hold the button (on the bottom side of the actuator) during manual operation.

For additional information see manuals for: Electronic Actuator AMV 150 Electronic Actuator AMV 13 Danfoss Valve VS 2

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20 | © Danfoss | Produced by Danfoss Redan A/S | 2023.02

AQ373475147162en-010102

Instructions for installation and use

VXe Solo

11. CONTROL OF HEATING CIRCUIT
Safety function, Jumo AT The heating circuit(s) can be supplied with a safety thermostat Jumo AT for protection against overheating.
From factory the Jumo AT safety thermostat is pre-wired to the Danfoss ECL controller with a 2 m cable, enabling the thermostat housing to be mounted in any mounting position on the household piping (HE supply) on site.
For additional information see the enclosed manuals for: Jumo AT

AQ373475147162en-010102

Instructions for installation and use

VXe Solo

12. HEATING CIRCUIT, PUMP
Grundfos Pump UPM3 AUTO

Grundfos UPM3 Auto has 12 optional settings, which can be selected with the push-botton. See fig. 1 – User interface.
The pump is set from factory to Proportionaldruck Pressure 2 .

The user interface shows: performance view (during operation)
– operation status – alarm status settings view (after pressing the button)
During operation, the display shows the performance of the pump. By pressing the button, the display changes status or you can change settings.

Abb. 1. Bedienfeld mit einer Drucktaste und fünf LED´s

The LEDs show the power consumption for the pump. When the pump is running, LED 1 is green. The four yellow LEDs indicate the current power consumption.
See fig. 2 – Performance view.

Fig. 2. Performance view
Performance % of P1 max. 0% (standby) 0 – 25% 25 – 50% 50 – 75% 75 – 100 %

22 | © Danfoss | Produced by Danfoss Redan A/S | 2023.02

AQ373475147162en-010102

Instructions for installation and use

VXe Solo

12. HEATING CIRCUIT, PUMP
Check the pump setting by pressing the button once (one constant pessure). The LEDs will briefly (2 sec.) show the pump setting before changing back to showing the power consumption. See fig. 3 – Pump setting view.
If the pump setting does not give the desired distribution of heat in the rooms of the house, change the pump setting. See fig. 3 – Pump setting view.
Before starting the setting, make clear what the display should show for the new setting (see fig. 3).
To change the pump setting, choose the setting you want (see fig. 3), press the button down for more than 2 seconds (less than 10) and the pump switches to setting selection, the LEDs start flashing and display the current setting. Then press the button until the LEDs shows the desired setting. The LEDs flash and when they stop the new setting is saved. The LEDs return to show power cunstumption.
Please note that if the LEDs do not flash after 2 seconds, possibly the pump setting is locked. To unlock, press the button down for more than 10 seconds. LEDs will flash and the pump is unlocked. To lock the pump, repeat the procedure.
For more information, se enclosed Grundfos instructions.

Fig. 3. Pump setting view

Funktion Application

PROPORTIONAL PRESSURE AUTO ADAPT

– Two-pipe systems

CONSTANT PRESSURE AUTO ADAPT

– One-pipe systems – Floor heating

PROPORTIONAL – Two-pipe systems

PRESSURE 1

small systems

PROPORTIONAL – Two-pipe systems

PRESSURE 2

middle-sized system

PROPORTIONAL – Two-pipe systems

PRESSURE 3

large systems

CONSTANT PRESSURE 1
CONSTANT PRESSURE 2
CONSTANT PRESSURE 3 MAX.
CONSTANT CURVE 1
CONSTANT CURVE 2
CONSTANT CURVE 3 – MAX.

– One-pipe systems – Floor heating small systems
– One-pipe systems – Floor heating middlesized- systems
– Floor heating – One-pipe systems large systems
– One-pipe systems – Charging systems
small systems
– One-pipe systems – Charging systems middle-sized systems
– One-pipe systems – Charging systems – Venting of installation large systems

Pump mode

Alarm status In case the 1st LED is red the pump has detected one or more alarms. See fig. 4 – Alarm status.
When there is no active alarm anymore the user interface switches back to operation mode shortly and then showing power consumption.
AQ373475147162en-010102

Fig. 4. Alarm status Function Blocked Supply voltage low Electrical error
© Danfoss | Produced by Danfoss Redan A/S | 2023.02 | 23

Instructions for installation and use

VXe Solo

13. DOMESTIC HOT WATER
General information PLEASE NOTE! Some models may have a slightly different appearance, but the control function is in principle the same as described below.
General The VXe Solo HWP (Fig. 1) is supplied with connection pipes for cylinder on the primary side and the VXe Solo HWS (Fig. 2) is supplied with connection pipes for cylinder on the secondary side.

Fig. 1 – VXe Solo HWP

VXe Solo HWP Please note that domestic hot water cylinder control is not included in the standard delivery. For temperature regulation of the DHW cylinder the VXe Solo
HWP can, as an option, be equipped with a RAVK self-acting thermostat and a 2-way valve VMA – for installation outside the system. The controller closes when the temperature rises.

Instructions rAVK (25-65 °C)

ENglIsh

RAVK

POlsKI

RAVK

Installation Guide VMA DN 15

www.danfoss.com

Page 4

www.danfoss.pl

Strona 4

VMA

VMA / RAVI / RAVK / RAVV

VMA/ABV

69

G 3/4A 65

131 139

District Energy

VI.52.V4.00

DEN-SMT/SI 1

VXe Solo HWS
For VXe Solo HWS the temperature in the cylinder is controlled by the Danfoss ECL controller in combination with the self-acting flow controller with integrated control valve Danfoss AVQM and actuator AMV 150, according to the cylinder temperature, measured by the cylinder sensor.

Fig. 2 – VXe Solo HWS

Danfoss ECL Comfort 310 The application Key contains information about application, language and factory settings, adapted to the type of system, for which it is ordered.
Note! Various applications can be loaded.
The controller is factory-set for local language and the running time for the actuator (DHW circuit) is preset for the actual application. General controller settings such as”Time and Date”must be entered during commissioning of the controller. And also the desired DHW temperature must be set. (Make sure that the immersion sensor is placed correctly before making adjustment of the temperature). Please refer to the enclosed manufacturer instructions for the ECL 210/310 controller in order to set the required domestic hot water temperature in the DHW cylinder circuit: ECL Application Key Box with ECL Comfort 210/310 user guide and mounting guide, for further information.
We recommend that your order commissioning of the controller with your local Danfoss Sales Company.
24 | © Danfoss | Produced by Danfoss Redan A/S | 2023.02

Cylinder supply Cylinder return

DHW
DHW
AQ373475147162en-010102

Instructions for installation and use

VXe Solo

13. DOMESTIC HOT WATER

Below schedule states whether the VXe Solo is supplied with connection pipes for DHW cylinder on the primary side or the secondary side, and whether the DHW temperature in the cylinder is controlled by the electronic controller and also states the controller application and the actuator/valve combination.

Type
VXe Solo HWP (ECL310/337)
VXe Solo HWS (ECL310/A337)

Primary Connection for Cylinder Secondary Connection for Cylinder Pump for cylinder circuit

Control not part of delivery

Danfoss ECL 310, Application A337 (AVQM / AMV 150)

Grundfoss UPM3 Auto

VXe Solo HWP with primary connection for cylinder

Cylinder

Supply limit

Cylinder Supply

Cylinder Return

DH Supply DH Return
VXe Solo HWS with secondary connection for cylinder
DH Supply DH Return

HE Supply
HE Return

Supply limit
Cylinder Return
Cylinder Supply

Cylinder

HE Supply
HE Return

AQ373475147162en-010102

Instructions for installation and use

VXe Solo

13. DOMESTIC HOT WATER
For VXe Solo HWS (ECL 310/A237) the temperature in the DHW cylinder is controlled by the electronic controller in combination with the self-acting flow controller with integrated control valve Danfoss AVQM and actuator AMV 13, according to the cylinder temperature, measured by the cylinder sensor. The AMV actuator is electrically wired to the controller from the plant.
The actuator has undergone a functional test and is preset from factory. Depending on the selected setting of the safety function, the AMV 13 valve is fully opened or closed when the voltage supply is switched off.
For additional information see manuals for: Self-acting flow controller with integrated control valve and actuator AVQM Electronic actuator AMV 13

AVQM

AMV 13

PUMP, DHW CYLINDER CIRCUIT
Domestic hot water circulation pump VXe Solo HWS with connection pipes for domestic hot water cylinder on the secondary side is fitted with a circulation pump Grundfos UPM3 Auto from factory. The pump is controlled by the cylinder sensor and ECL controller in combination.
For more information, see Grundfos pump instructions and Danfoss ECL application key instructions.

AQ373475147162en-010102

Instructions for installation and use

VXe Solo

14. MAINTENANCE
Maintenance work Is only to be carried out by qualified and authorised personnel.
Inspection The water heater should be checked regularly by authorised personnel. Any necessary maintenance must be performed in accordance with the instructions in this manual and other sets of instructions. During service the dirt strainers are to be cleaned including the filter on the controller, all pipe connections must be tightened and the safety valve must be function tested by turning the lever.
Rinsing/cleaning of plate heat exchanger To clean the plate heat exchanger, rinse it by running clean water through the exchanger at high speed and in the opposite direction to the normal flow. This will remove any dirt deposits that may have built up in the exchanger. If rinsing with clean water is not sufficient, the exchanger can also be cleaned by circulating a cleaning agent approved by Danfoss (e.g. Kaloxi or Radiner Fl cleaning fluid) through the exchanger. Both these cleaning fluids are environmentally friendly and can be disposed off through the standard sewer system. After use of a cleaning fluid, the plate heat exchanger must be rinsed thoroughly with clean water.
Acidification of brazed plate heat exchanger As a starting point, we do not recommend acidification of the exchanger. Deposits of limescale may build up in plate heat exchangers for domestic hot water on account of the large temperature fluctuations, and because aerated water is used on the secondary side. If it becomes necessary to clean the exchanger with acid, this can be done as shown on the drawing to the right. Brazed plate heat exchangers can withstand rinsing with a dilute acid solution – e.g. 5% formic, acetic or phosphoric acid).
Measures after maintenance work After maintenance work and before commissioning: Check that all screwed connections are tight. Check that all safety features, covers, that were removed, have
been replaced properly. Clean the working area and remove any spilled materials. Clear all tools, materials and other equipment from the working
area. Connect to energy supply and check for leaks. Vent the system. Carry out any necessary adjustment again. Make sure that all safety features on the device and the system
work properly.
Meter reading The caretaker/owner must perform visual checking and reading of the district heating meter at short, regular intervals. (The meter is not a part of the delivery from Danfoss). Service procedures must only be performed by trained, authorised personnel. NB! Excessive consumption for whatever reason is not covered by the Danfoss warranty.
Cooling / Return temperature reading Cooling i.e. the difference between the supply and return temperature of the district heating water has a significant effect on overall energy economy. Therefore, it is important to focus on the supply and return temperature in the heating system. The difference should typically be 3035°C. Please note that a low district heating return temperature is directly related to the return temperature from the heating circuit and the return temperature of the circulation water. It is therefore important to focus on these return temperatures.

Please note Use of other types of packaging, than the ones, with which the unit is delivered, will lead to the loss of warranty.

AQ373475147162en-010102

Instructions for installation and use

VXe Solo

14. MAINTENANCE SCHEDULE (recommendations)

Interval At least once per month
At least once a year

Maintenance work

Comments

Read the meter and check the system and all connections for leaks
Check the pipes and exchanger for signs of corrosion. Check for visible signs of coatings (typically white coatings or green irises) on the surface of the exchanger or pipes
Check all connections for leaks
Check all connections for leaks
Check that the safety valve on the cold water supply is functioning correctly. Check that all components are intact and functioning as intended

Enter the measured readings in the control book – contact qualified and authorised personnel in the event of leaks or other irregularities Visuel control In the event of coatings or green irises on the surface of the exchanger, the exchanger must be replaced immediately by qualified and authorised personnel
If you identify a leak, replace the gaskets and retighten the pipe connections
If you identify a leak, replace the gaskets and retighten the pipe connections
Check the functionality by turning the lever on the safety valves
In the event of irregularities, lack of functionality or visible faults and defects in a component, replace the component in questionn

Clean all dirt filters/strainers in the substation

Replace any filters that are not intact

Check that any electrical cables are in serviceable condition and that it is possible to disconnect the electrical power supply to the substation

Visual check. Check whether it is possible to disconnect the current to the substation.

Check the pipes and exchanger for signs of corrosion

Visual check

Check that the insulation cover is intact

Make sure that the insulation cover encloses the substation tightly

Check that the temperature regulators are set in accordance with the instructions in this manual

Follow the instructions in the present manual

Check the functions of all shut-off valves

Check that the ball valves open and close as they should

*)Enduser/caretaker. Note! After maintenance work has been carried out all gaskets HAVE to be replaced.

AQ373475147162en-010102

Instructions for installation and use

VXe Solo

15. TROUBLESHOOTING HE

Fundamental

In the event of disruptions to operation, you should fundamentally – before commencing the actual troubleshooting – check whether:

· check the pipesand exchanger for signs of corrosion. check for visible signs of coatings (typically white coatings or green irises) on the surface of the exchanger or pipes
· the system is correctly connected · the district heating supply temperature is at its normal level · the differential pressure is at its normal level. Ask your district
heating supplier if necessary

· there is a power supply to the system – pump and automatics · the dirt strainer in the district heating supply pipe is clean · there is air in the system (if the system is vented)

Problem Too little or no heat.

Possible cause Strainer clogged in DH or HE circuit (radiator circuit). The filter in the energy meter on DH circuit clogged. Defective or improperly adjusted differential pressure controller
Sensor defective.
Automatic controls wrongly set or defective – possibly power failure.
Pump out of operation.

Solution
Clean gate/strainer(s).
Clean the filter (after consulting the DH plant operator).
Check the operation of the differential pressure controller clean the valve seat if required.
Check the operation of the thermostat clean the valve seat if required.
Check if the setting of the controller is correct see separate instructions. Check the power supply. Temporary setting of motor to “manual” control see instructions on automatic controls.
Check if the pump is receiving power and that it turns. Check if there is air trapped in the pump housing see pump manual.

Uneven heat distribution. DH supply temperature too high.
DH supply temperature too low.

The pump is set at too low speed of rotation.

Set the pump at higher speed of rotation.

Air pockets in the system.
Limiting of the return temperature adjusted too low.

Vent the installation thoroughly. Adjust according to instructions.

Defective radiator valves.

Check replace.

Uneven heat distribution in building because of incorrectly set balancing valves, or because there are no balancing valves.
Diameter of pipe to flat station too small or branch pipe too long.
Air pockets in the system.

Adjust/install balancing valves.
Check pipe dimensions. Vent the installation thoroughly.

Defective controller. The controller does not react as it should according to the instructions.
Defective control valve.

Set the automatic controls according to the instructions.
Replace control valve .

Defective controller. The controller does not react as it should according to the instructions.
Strainer clogged.

Set the automatic controls according to the instructions.
Clean gate/strainer.

AQ373475147162en-010102

Instructions for installation and use
15. TROUBLESHOOTING HE

VXe Solo

Too high DH return temperature.
Noise in system. Heat load too high.

Too small heating surface/too small Increase total heating surface. radiators compared to the total heating requirement of the building.

Poor utilization of existing heating surface. Defective sensor on self-acting thermostat.

Make sure the heat is distributed evenly across the full heating surface open all radiators and keep the radiators in the system from heating up at the bottom. It is extremely important to keep the supply temperature to the radiators as low as possible, while maintaining a reasonable level of comfort.

The system is single pipe loop.

Das System sollte mit elektronischen Reglern und Rücklauffühlern ausgestattet sein.

Pump pressure too high.

Pumpe niedriger einstellen.

Air in system.

System entlüften.

Defective or incorrectly set radiator Check set/replace. valve(s). Single pipe loop systems require special one-pipe radiator valves.

Dirt in the differential pressure controller.

Check clean out.

Defective motorized valve, sensor or Check replace. automatic controller.

Pump pressure too high. Noice from Adjust pump to a lower level. Check

radiator valves.

flow direction.

Defective motorized valve, sensor or Check replace. electronic controller.

Disposal This product should be dismantled and its components sorted, if possible, in various groups before recycling or disposal. Always follow the local disposal regulations.

AQ373475147162en-010102

Instructions for installation and use

VXe Solo

15. TROUBLE SHOOTING – DOMESTIC HOT WATER

Fundamental

In the event of disruptions to operation, you should fundamentally – before commencing the actual troubleshooting – check whether:

· the system is correctly connected · the district heating supply temperature is at its normal level · the differential pressure is at its normal level. Ask your district
heating supplier if necessary

· there is a power supply to the system – pump and automatics · the dirt strainer in the district heating supply pipe is clean · there is air in the system (if the system is vented)

Problem

Possible cause

Too little or no domestic hot water Dirt strainer in the district heating supply line clogged.
Charging pump pump out of operation or set too low.

Defective actuator – or possibly dirt in the valve housing.
No power
Automatic controls wrongly set or defective – possibly power failure.

Calified plate heat exchanger
Defective actuator or thermostat Defective or clogged non-return valve. Defective immersion sensor. Inadequate cylinder capacity.

Hot water is available only at some Cold and warm drinking water mix, e.g. in a

taps

defective thermostatic mixing valve.

Solution
Clean the dirt strainer.
Check whether the pump is running – whether the pump is receiving power. Control that there is no air in the pump housing – see pump manual. Check the functions of the actuator – clean valve seat if required. Check
Check if the setting of the controller is correct, – see separate instructions. Check the power supply; Temporary setting of actuator to “manual” control – see instructions on heating circuit, manual control. Replace
Check according to encl. manual – replace Replace or clean Replace sensor.
Wait for heating / loading of the cylinder. You may check the specifications of the manufacturer conc. cylinder capacity. Check – replace

DHW temperature too high

Non-return valve on the circulation line defective (leads to mixing – and the circulation water pipes become cold during tapping).
Thermostatic valve RAVK/VMA set to high

Replace the non-return valve Check – adjust

Declining temperature during tapping
Temperature control valve does not close
Poor cooling

Calified heat exchanger

Replace

The temperature difference between the supply Choose a lower DHW setpoint or increase the

flow and the DHW setpoint is too low.

supply water temperature.

Calified heating element

Clean DHW cylinder with acid solution or replace heating element.

AQ373475147162en-010102

Instructions for installation and use

VXe Solo

15. TROUBLE SHOOTING – DOMESTIC HOT WATER

Temperature falls during tapping Controller incorrectly adjusted or defective. (lack of capacity)
The immersion thermostat sensor incorrectly fitted in the cylinder.
Calified heating element.

Check that the setting of the controller is correct. – see the controller instruction manual.
Place sensor correctly according to the specifictions of the manufacturer. You may contact Danfoss Redan A/S for further information.
Descale the heat exchanger or replace it.

Temperature too high No DHW

Defective actuator – possibly dirt in the valve housing. Automatic controls wrongly set or defective.
Defective immersion sensor. Calified heating element. Insufficient cylinder capacity

Check the functions of the actuator – clean valve seat if required.
Check if the setting of the controller is correct, see separate instructions.
Replace immersion sensor.
Clean DHW cylinder with acid solution or replace heating element.

AQ373475147162en-010102

Instructions for installation and use

VXe Solo

16. EU DECLARATION OF CONFORMITY

AQ373475147162en-010102

Instructions for installation and use

VXe Solo

17. COMMISSIONING CERTIFICATE

The substation is the direct link between the district heating supply network and the household piping system. All supply pipes and the pipes in the household piping system must be checked and rinsed before commissioning. Once the system has been filled with water, all pipe connections must be retightened before performing pressure test for leaks. The dirt strainers must be cleaned and the substation must be adjusted in accordance with the instructions in this manual.
It is important to comply with all technical regulations and the applicable legislation in every respect.
Installation and commissioning must only be performed by trained, authorised personnel.
The substation is checked in the factory for leaks before delivery. Leaks are however possible due to vibrations caused by transport, handling and heating of the system and therefore it is important to check all connections and to retighten if necessarys before commissioning. Please note that the connections may feature EPDM gaskets! Therefore it is important that you DO NOT OVER- TIGHTEN the connections. Over-tightening may result in leaks. Leaks caused by ove-rtightening or failure to retighten connections are not covered by the warranty.

To be filled-out by the installer This substation has been retightened, adjusted and commissioned

on the:

Date/Year

by installer:

Company name (stamp)

AQ373475147162en-010102

Instructions for installation and use

VXe Solo

18. GUIDELINES FOR WATER QUALITY IN DANFOSS BRAZED HEAT EXCHANGERS

Parameter
pH
Conductivity
Free Chlorine
Ammonia (NH3, NH4+) Alkalinity (HCO3-) Sulphate (SO42-) HCO3- / SO42Nitrate (NO3) Manganese (Mn) Iron (Fe) * Hardness ratio [Ca2+, Mg2+]/[HCO3-]

Unit
µS/cm
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
/

Value or concentration
< 6.0 6,0 7.5 7.5 10.5

10.5 <10 10 500 500 1000 >1000 <0.5 0.5 1 1 5 >5 <2 2 20 >20 <60 60 300 >300 <100 100 300 >300 >1.5 <1.5 <100 >100 <0.1 >0.1 <0.2 >0.2 0 0.3 0.3 0.5 >0.5

Plate AISI 316L W.Nr. 1.4404
o + + + + + + + + o + + + + + + + + + + + + + + + + + + + +

+ Good corrosion resistance o **Corrosion could happen when more parameters are evaluated with o o/- Risk of corrosion – Use is not recommended

Hardness ration limits defined per experience and internal tests in Danfoss laboratory ** In case of three or more parameters evaluated with o consultancy is needed with Consultant for Corrosion & Microbiology or BU HHE Representative

Brazing material

Cu

CuNi

StS

–

o

o/-

o