Danfoss EvoFlat Flat Stations Operating guide [de]
Mounting and installation instructions
EvoFlat Flat Stations for apartments, singleand multi-family houses
Complete heat-insulated flat stations for direct heating and instantaneous domestic hot water
EvoFlat
Flat Stations for apartments, singleand multi-family houses
Mounting and installation instructions |
EvoFlat |
EvoFlatWSS |
EvoFlat FSS |
EvoFlat MSS |
EvoFlatWSS , with circulation |
EvoFlat FSS, with circulation |
EvoFlat MSS, with circulation |
1. CONTENT |
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1.0 |
Table of contents.............................................................................................................................................................................. |
2 |
2.0 |
Safety notes....................................................................................................................................................................................... |
3 |
2.1 |
Safety notes - general................................................................................................................................................................................... |
3 |
3.0 |
Mounting........................................................................................................................................................................................... |
5 |
3.1 |
Mounting......................................................................................................................................................................................................... |
5 |
3.2 |
Start-up............................................................................................................................................................................................................ |
6 |
3.3 |
Electrical connections.................................................................................................................................................................................... |
7 |
4.0 |
Construction...................................................................................................................................................................................... |
8 |
4.1 |
Construction & Dimensional sketches, WSS............................................................................................................................................. |
8 |
4.2 |
Diagrams, WSS................................................................................................................................................................................................ |
9 |
4.3 |
Construction & Dimensional sketches, FSS Standard........................................................................................................................... |
10 |
4.4 |
Diagrams, FSS................................................................................................................................................................................................ |
11 |
4.5 |
Construction & Dimensional sketches, MSS Standard......................................................................................................................... |
12 |
4.6 |
Diagrams, MSS.............................................................................................................................................................................................. |
13 |
4.7 |
Construction & Dimensional sketches, FSS & MSS A............................................................................................................................ |
14 |
4.8 |
Diagrams, FSS & MSS A............................................................................................................................................................................... |
15 |
5.0 |
Controls............................................................................................................................................................................................ |
16 |
6.0 |
Maintenance................................................................................................................................................................................... |
21 |
7.0 |
Troubleshooting.............................................................................................................................................................................. |
22 |
7.1 |
General troubleshooting............................................................................................................................................................................. |
22 |
7.2 |
Troubleshooting: DHW................................................................................................................................................................................ |
22 |
7.3 |
Troubleshooting: HE..................................................................................................................................................................................... |
23 |
7.4 |
Disposal.......................................................................................................................................................................................................... |
24 |
8.0 |
Declaration...................................................................................................................................................................................... |
26 |
8.1 |
EU declaration of conformity..................................................................................................................................................................... |
26 |
2 | © Danfoss | Produced by Danfoss Redan A/S | 2020.12 |
AQ15928645880503-020501 |
Mounting and installation instructions |
EvoFlat |
2.0SAFETY NOTES
2.1Safety Notes – general
The following instructions refer to the standard design of flat stations.
This operating manual should be read carefully before installation and start-up of the flat station. The manufacturer accepts no liability for damage or faults that result from non-compliance with the operating manual. Please read and follow all the instructions carefully to prevent accidents, injury and damage to property.
Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.
Please comply with the instructions issued by the system manufacturer or system operator.
Corrosion protection
All pipes and components are made of stainless steel and brass.
The maximum chloride compounds of the flow medium should not be higher than 150 mg/l.
The risk of equipment corrosion increases considerably if the recommended level of permissible chloride compounds is exceeded.
Energy source
The flat station is designed to be connected to decentralized heating installations with various energy sources, such as district heating, central boiler (gas, oil, biomass, etc.), solar, heat pump or a combination between them if the operating conditions allow it.
Application
The flat station is designed to be connected to the house installation in a frost-free room, where the temperature does not exceed 50 °C and the humidity does not exceed 80%. Do not cover or wall up the flat station or in any other way block the entrance to the station.
Choice of material
Choice of materials always in compliance with local legislation.
Safety valve(s)
We recommend mounting of safety valve(s), however, always in compliance with local regulations.
Noise level.
≤ 35 dB
Connection
The flat station must be equipped with features that ensure that the flat station can be separated from all energy sources (also power supply).
Emergency
In case of danger or accidents – fire, leaks or other dangerous circumstances
– interrupt all energy sources to the station if possible, and seek expert help. In case of discoloured or bad-smelling domestic hot water, close all shut-off valves on the flat station, inform the operating personnel and call for expert help immediately.
Storage
Any storage of the flat station which may be necessary prior to installation should be in conditions which are dry and heated.
Authorized personnel only
Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.
Please observe instructions carefully
To avoid injury to persons and damage to the device, it is absolutely necessary to read and observe these instructions carefully.
Warning of high pressure and temperature
Be aware of the installation’s permissible system pressure and temperature.
The maximum temperature of the flow medium in the flat station is 95 °C.
The maximum operating pressure of the flat station is 10 bar.
The risk of persons being injured and equipment damaged increases considerably if the recommended permissible operating parameters
Warning of hot surface
The flat station has got hot surfaces, which can cause skin burns.
Please be extremely cautious in close proximity to the flat station.
Power failure can result in the motor valves being stuck in open position. The surfaces of the flat station can get hot, which can cause skin burns. The ball valves on district heating supply and return should be closed.
Warning of transport damage
Before flat station installation, please make sure that the flat station has not been damaged during transport.
IMPORTANT - Tightening of connections
Due to vibrations during transport all flange connections, screw joints and electrical clamp and screw connections must be checked and tightened before water is added to the system. After water has been added to the system and the system has been put into operation, re-tighten ALL connections. Check that all hairpins in click connections are completely pushed in.
AQ15928645880503-020501 |
© Danfoss | Produced by Danfoss Redan A/S | 2020.12 | 3 |
Mounting and installation instructions |
EvoFlat |
Reach
All products of the EvoFlat 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 electrical potential differences (contact voltages), which can occur between eg two pipelines. Equipotential bonding is an important measure for protection 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
The station consists of materials that must not be disposed of with household waste. Disconnect the entire energy supply and disassemble the product for disassembly and dispose of it in accordance with local regulations.
Please notice
Interventions and reworking of our components lead to the loss of warranty.
4 | © Danfoss | Produced by Danfoss Redan A/S | 2020.12 |
AQ15928645880503-020501 |
Mounting and installation instructions |
EvoFlat |
3. MOUNTING
3.1 Mounting
Installation must be in compliance with local standards and regulations. Heat Source (HS) - In the following sections, HS refers to the heat source which supplies the flat stations. A variety of energy sources, such as oil, gas or solar power, could be used as the primary supply to Danfoss substations. For the sake of simplicity, HS can be taken to mean the primary supply.
Mounting
Adequate space
Please allow adequate space around the flat station for mounting and maintenance purposes.
Orientation
The station must be mounted so that components, keyholes and labels are placed correctly. If you wish to mount the station differently please contact your supplier.
Drillings
Where substations are to be wall-mounted, drillings are provided in the back mounting plate.
Labelling
Each connection on the substation is labelled
Before installation:
Clean and rinse
Prior to installation, all substation pipes and connections should be cleaned and rinsed.
Thightening
Due to vibration during transport, all substation connections must be checked and tightened before installation. Check that all hairpins in click connections are completely pushed in.
Unused connections
Unused connections and shut-off valves must be sealed with a plug. Should the plugs require removal, this must only be done by an authorized service technician.
Installation:
Strainer
If a strainer is supplied with the station it must be fitted according to schematic diagram. Please note that the strainer may be supplied loose.
Connections
Connection to the household installation and district heating pipes connections must be made using threaded, flanged or welded connections. The internal connections of the flat station are made by click-fit connections.
Authorized personnel only
Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.
Keyhole for mounting.
Please notice
Use of packaging types other than that with which the device is delivered will void the warranty.
AQ15928645880503-020501 |
© Danfoss | Produced by Danfoss Redan A/S | 2020.12 | 5 |
Mounting and installation instructions |
EvoFlat |
3.2 Start-up
Start-up, Direct heating
The shut-off valves should be opened and the unit observed as it enters service. Visual checking should confirm temperatures, pressures, acceptable thermal expansion and absence of leakage.
If the heat exchanger operates in accordance with design, it can be put to regular use.
After water has been added to the system and the system has been put into operation, re-tighten ALL connections. Check that all hairpins in click connections are completely pushed in.
Start-up, Heating with mixing loop
Start-up:
1: Pump speed
Set the pump to its highest speed of rotation before start-up. On radiator systems, the selector switch is normally set in“Variable curve / Proportional curve” setting, in “max. pos.”. For floor heating systems, the selector switch is normally set in “Constant curve” setting, in “max. pos.”.
2: Start pump
Start the pump and heat through the system.
3: Open shut-off valves
The shut-off valves should then be opened and the unit observed as it enters service. Visual checking should confirm temperatures, pressures, acceptable thermal expansion and absence of leakage.
If the system operates in accordance with design, it can be put to regular use, - always taking into account the conditions in the building.
4: Vent system
Switch off the pump and vent the installation after the system has been warmed up. Please note that some pump types feature a built-in venting function. For others the installation can be vented by using a vent valve in the flat station or on the radiators, or, if appropriate, the air valve at the highest point of the system – For additional information, please refers to the enclosed pump and manual.
5: Adjust pump speed
Set the pump to the lowest possible position, depending on the heating requirement for the building - taking into account aspects such as cooling and power consumption.
If the heating requirement increases the pump setting can be changed by means of the selector switch. Please refer to the enclosed instruction manual for detailed information about setting ranges.
In the summer, you can switch off the power to the pump at the mains if you want to save electricity by not heating your home. It should be ensured that no inappropriate hydraulic situation will occur, when the power to your pump is turned off.
For start-up and venting – see above and the enclosed pump manual.
Re-thighten connections
After water has been added to the system and the system has been put into operation, re-tighten ALL connections.
Check that all hairpins in click connections are completely pushed in.
6 | © Danfoss | Produced by Danfoss Redan A/S | 2020.12 |
AQ15928645880503-020501 |
Mounting and installation instructions |
EvoFlat |
3.3 Electrical connections
Before making electrical connections, please note the following:
Safety notes
Please read the relevant parts of the safety notes.
230 V
The flat station must be connected to 230 V AC and earth.
Disconnection
The substation must be electrically connected so that it can be disconnected for repairs.
Grounding / potential compensation
The station should be connected to a grounding point on the right side of the station mounting rail.
Authorized electrician
Electrical connections must be made by an authorized electrician only.
Local standards
Electrical connections must be made in accordance with current regulations and local standards.
AQ15928645880503-020501 |
© Danfoss | Produced by Danfoss Redan A/S | 2020.12 | 7 |
Mounting and installation instructions |
EvoFlat |
4.0. MAIN COMPONENTS & DIMENSIONAL SKETCHES
4.1 Construction WSS
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WSS 1, 2, 3 |
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2. |
Plate heat exchanger |
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Plate heat exchanger |
5. |
Strainer |
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5. |
Strainer |
17. |
Air valve |
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6. |
Non-return valve |
23. |
Sensor pocket M10 |
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7. |
Ball valve |
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24. |
Fitting piece, energy meter |
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9. |
Circulation pump |
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DHW controller type TPC-M |
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12. |
Safety valve |
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40. |
Summer by-pass |
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17. |
Air valve |
59. |
Fitting piece, water meter |
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23. |
Sensor pocket M10 |
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24. |
Fitting piece, energy meter |
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DHW controller type TPC-M |
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40. |
Summer by-pass |
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59. |
Fitting piece, water meter |
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1. Domestic cold water (DCW) |
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Kaltwasser (KW) Austritt |
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Fernwärme (FW) Vorlauf |
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Fernwärme (FW) Rücklauf |
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4. District heating (DH) supply |
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Heizung (HE) Vorlauf |
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Heizung (HE) Rücklauf |
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6. Circulation |
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Your flat station might look different than the substation shown.
142,4 |
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8 | © Danfoss | Produced by Danfoss Redan A/S | 2020.12 |
AQ15928645880503- |
|
020501 |
Mounting and installation instructions |
EvoFlat |
4,2 Diagrams, WSS
WSS 1, 2, 3
2. |
Plate heat exchanger |
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5. |
Strainer |
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23. |
Sensor pocket M10 |
3/4” × 110 mm |
24. |
Fitting piece, energy meter |
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33. |
Plug |
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38 |
DHW controller type TPC-M |
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40. |
Summer by-pass |
3/4” × 110 mm |
59. |
Fitting piece, water meter |
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DHW
DCW
DCW
DH Supply
DH return
WSS 1, 2, 3, with circulation
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2. |
Plate heat exchanger |
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5. |
Strainer |
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6. |
Non-return valve |
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7. |
Ball valve |
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9. |
Circulation pump Yonos Para Z 15/7 |
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12. |
Safety valve |
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23. |
Sensor pocket M10 |
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24. |
Fitting piece, energy meter 3/4” × 110 mm |
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DHW |
33. |
Plug |
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38 |
DHW controller type TPC-M |
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40. |
Summer by-pass |
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59. |
Fitting piece, water meter 3/4” × 110 mm |
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DCW |
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DCW |
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Circulation |
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DH supply |
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DH return |
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Your flat station might look different than the substation shown. |
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AQ15928645880503-020501 |
© Danfoss | Produced by Danfoss Redan A/S | 2020.12 | 9 |
Mounting and installation instructions |
EvoFlat |
4.3 Construction FSS, Standard
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12 9
Main components
FSS 1, 2, 3
2.Plate heat exchanger
5.Strainer
17. |
Air valve |
6 |
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23. |
Sensor pocket M10 |
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24. |
Fitting piece, energy meter |
7 |
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38 |
DHW controller type TPC-M |
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40. |
Summer by-pass |
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59. |
Fitting piece, water meter |
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17
40
38
235
59 |
24 |
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Main components
FSS1, 2, 3 with circulation
2.Plate heat exchanger
5.Strainer
6.Non-return valve
7.Ball valve
9.Circulation pump
12. Safety valve
17. Air valve
23.Sensor pocket M10
24.Fitting piece, energy meter
38DHW controller type TPC-M
40. Summer by-pass
59. Fitting piece, water meter
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1. Domestic cold water (DCW) |
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2. Domestic hot water (DHW) |
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Kaltwasser (KW) Eintritt |
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Warmwassser (WW) |
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4. District3 Kaltwasserheating (DH)(KW)supplyAustritt |
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5. District4 Fernwärmeheating (DH)(FW)returnVorlauf |
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Fernwärme (FW) Rücklauf |
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6. HE supply |
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Heizung (HE) Vorlauf |
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7. HE return |
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Heizung (HE) Rücklauf |
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8. Circulation |
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142,4 |
Your flat station might look different than the substation shown.
10 | © Danfoss | Produced by Danfoss Redan A/S | 2020.12 |
AQ15928645880503-020501 |
Mounting and installation instructions |
EvoFlat |
4.4 Diagrams, FSS Standard
FSS 1, 2, 3
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2. |
Plate heat exchanger |
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5. |
Strainer |
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23. |
Sensor pocket M10 |
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24. |
Fitting piece, energy meter 3/4” × 110 mm |
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27. |
Temperature sensor DHW |
2 |
38 |
DHW controller type TPC-M |
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40. |
Summer by-pass |
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59. |
Fitting piece, water meter 3/4” × 110 mm |
27 |
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DHW |
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38 |
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DCW |
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59 |
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DCW |
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40 |
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DH supply |
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HE supply |
23 |
5 |
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24 |
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DH return |
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HE return |
FSS 1, 2, 3, with circulation
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2. |
Plate heat exchanger |
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5. |
Strainer MW 0,6 mm |
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6. |
Non-return valve |
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7. |
Ball valve |
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9. |
Circulation pump Yonos Para Z 15/7 |
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12. |
Safety valve |
DHW |
17. |
Air valve |
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23. |
Sensor pocket M10 |
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24. |
Fitting piece, energy meter 3/4” × 110 mm |
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38 |
DHW controller type TPC-M |
DCW |
40. |
Summer by-pass |
59. |
Fitting piece, water meter 3/4” × 110 mm |
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DCW |
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Circulation |
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DH supply |
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HE supply |
DH return |
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HE return |
Your flat station might look different than the substation shown.
4.4.1 EvoFlat Technical Parameters
Nominal pressure: |
PN10 |
Max. DH supply temperature: |
95 °C |
Min. DCW static pressure: |
1,5 bar |
Brazing material (HEX): |
Copper / Stainless steel |
AQ15928645880503-020501 |
© Danfoss | Produced by Danfoss Redan A/S | 2020.12 | 11 |
Mounting and installation instructions |
EvoFlat |
4.5 Construction, MSS Standard
17
40
38 |
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2 |
23 |
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5 |
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29 |
30 |
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6 |
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54 |
10 |
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59 |
24 |
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MSS 1, 2, 3
2.Plate heat exchanger
5.Strainer
6.Non-return valve
10. Circulation pump, mixing circuit
17. Air valve
23.Sensor pocket M10
24.Fitting piece, energy meter
29.Actuator
30.Valve
38 DHW controller type TPC-M
40. Summer by-pass
54. Safety thermostat 55°C
59. Fitting piece, water meter
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17
40
38
2 23
5
29 30
54 10
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24 |
12 |
9 |
MSS 1, 2, 3 with circulation |
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2.Plate heat exchanger
5.Strainer
6.Non-return valve
7.Ball valve
9.Circulation pump, circulation
610. Circulation pump, mixing circuit
12. Safety valve
717. Air valve
23.Sensor pocket M10
24.Fitting piece, energy meter
29.Actuator
30.Valve
38 DHW controller type TPC-M
40. Summer by-pass
54. Safety thermostat 55°C
59. Fitting piece, water meter
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2 |
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6 |
7 |
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1. Domestic cold water (DCW) |
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2. Domestic hot water (DHW) |
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1 |
Kaltwasser (KW) Eintritt |
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3. Domestic cold water (DCW) |
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44 |
2 |
Warmwassser (WW) |
4. District3 Kaltwasserheating (DH)(KW)supplyAustritt |
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5. District4 Fernwärmeheating (DH)(FW)returnVorlauf |
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5 |
Fernwärme (FW) Rücklauf |
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6. HE supply |
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6 |
Heizung (HE) Vorlauf |
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7. HE return |
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7 |
Heizung (HE) Rücklauf |
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8. Circulation |
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8 |
591 |
Your flat station might look different than the substation shown.
|
|
|
12 | © Danfoss | Produced by Danfoss Redan A/S | 2020.12 |
AQ15928645880503- |
|
020501 |
Mounting and installation instructions |
EvoFlat |
4.6 Diagrams, MSS Standard
MSS 1, 2, 3
DHW
DCW
DCW
2 |
Plate heat exchanger |
23 |
Sensor pocket M10 |
5 |
Strainer MW 0,6 mm |
24 |
Fitting piece for energy meter |
6 |
Non-return valve |
|
3/4” x 110 mm |
10 |
Circulation pump mixing circuit |
29 |
Actuator |
|
Wilo Para 15/6 |
30 |
Valve |
|
|
33 |
High-temperature connection |
|
|
38 |
Hot Water Controller TPC-M |
|
|
40 |
Summer-Bypass |
|
|
52 |
Zone valve |
|
|
54 |
Safety thermostat |
|
|
59 |
Fitting piece for DCW: |
|
|
|
3/4” × 110 mm |
DH supply |
|
|
|
HE supply |
DH return |
|
|
|
HE return |
MSS 1, 2, 3, with circulation |
|
|
|
|
|
2 |
Plate heat exchanger |
23 |
Sensor pocket M10 |
|
5 |
Strainer MW 0,6 mm |
24 |
Fitting piece for energy meter |
|
6 |
Non-return valve |
|
3/4” x 110 mm |
|
7 |
Ball valve |
29 |
Actuator |
|
9 |
Circulation pump: |
30 |
Valve |
|
|
Yonos Para Z 15/7 |
33 |
High-temperature connection |
|
10 |
Circulation pump mixing circuit |
38 |
Hot Water Controller TPC-M |
DHW |
|
Wilo Para 15/6 |
40 |
Summer-Bypass |
12 |
Safety valve |
52 |
Zone valve |
|
|
|
|
54 |
Safety thermostat |
|
|
|
59 |
Fitting piece for DCW: |
|
|
|
|
3/4” × 110 mm |
DCW |
|
|
|
|
DCW
Circulation
DH supply |
HE supply |
DH return |
HE return |
Your flat station might look different than the substation shown.
4.6.1 EvoFlat Technical Parameters
Nominal pressure: |
PN10 |
Max. DH supply temperature: |
95 °C |
Min. DCW static pressure: |
1,5 bar |
Brazing material (HEX): |
Copper / Stainless steel |
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Mounting and installation instructions |
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4.7 Construction, FSS & MSS A |
|
17 |
17 |
Your flat station might look different than the substation shown.
Main components |
|
|
|
FSS A1, A2, A3 |
MSS A1, A2, A3 |
||
2. |
Plate heat exchanger |
2. |
Plate heat exchanger |
5. |
Strainer |
5. |
Strainer |
17. |
Air valve |
6. |
Non-return valve |
21. |
Return temperature limiter |
10. |
Circulation pump mixing circuit |
23. |
Sensor pocket M10 |
17. |
Air valve |
24. |
Fitting piece, energy meter |
23. |
Sensor pocket M10 |
38 |
DHW controller type TPC-M |
24. |
Fitting piece, energy meter |
40. |
Summer by-pass |
29. |
Actuator |
58. |
Fitting piece, water meter DHW |
30. |
Valve |
59A. Fitting piece, water meter DCW inlet |
38 |
DHW controller type TPC-M |
|
59B. Fitting piece, water meter DCW outlet |
40. |
Summer by-pass |
|
64. |
Flow limiter |
54. |
Safety thermostat 55°C |
|
|
58. |
Fitting piece, water meter DHW |
59A. Fitting piece, water meter DCW inlet
59B. Fitting piece, water meter DCW outlet
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4.8 Diagrams, FSS & MSS A
FSS A1, A2, A3
DHW
DCW
DCW
DH supply
DH return
MSS A1, A2, A3
DHW
DCW
DCW
DH supply
DH return
Your flat station might look different than the substation shown.
HE supply
HE return
HE supply
HE return
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5.0. CONTROLS
5.1 TPC multi-functional controller
Multi-functional controller with integrated zone valve, air vent, differential pressure and PWH temperature controller.
PWH temperature control
direction the temperature is increased, by turning it in (-/MIN) direction the temperature is decreased.
Setting range 40-60°C.
PWH temperature should be adjusted to 50 °C, as this provides optimal utilization of DH water.
For systems with circulation, the hot water temperature must be 60 ° C and the circulation return temperature must not fall below 55 ° C. (valid for DE).
Note: Systems with DHW circulation generate significantly higher heating return temperatures in circulation mode than in full load mode
Differential pressure controller
The differential pressure controller equalizes the high fluctuations in pressure arriving from the heat source, ensuring constant operating pressure The following applies to all EvoFlat stations:
At the “HE” connection, the available differential pressure is - depending on volume flow (40 - 645 l / h) - between 220 - 165 mbar.
Zone valve
The TPC multi-functional controller contains a zone valve. The TWA-Q/NC actuator can be mounted on the zone valve.
The transport protection on the TWA-Z/NC actuator must be removed before use.
5.2 Air vent
The station should be vented during start up.
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5.3 Strainer
Strainers should be cleaned regularly by authorized personnel. The frequency of cleaning would depend on operating conditions.
5.4 Summer bypass
The bypass thermostat is designed to keep the supply line warm. Setting range: 10-50°C.
Scale setting (indicative). Factory setting 2,5.
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5.5 Mixing loop
The mixing loop creates a suitable temperature level e.g. for floor heating
5.6 FTC control
The FTC controls the mixing loop HE supply temperature. Setting range 15-50°C.
The setting values may vary depending on the operating conditions. It is important to set the supply temperature to the radiators as low possible.
NB! For houses that are heated exclusively with floor heating. ALWAYS refer to the instructions from the floor supplier. Factory setting: 50°C.
5.7 Safety thermostat
The safety thermostat will shut the zone valve if the HE supply temperature is above 55°C.
5.8 Safety valve
The purpose of the safety valve is to protect the flat station from excessive pressure.
The blow-off pipe from the safety valve must not be closed. The blow-off pipe outlet should be placed so that it discharges freely and it is possible to observe any dripping from the safety valve.
It is recommended to check the operation of safety valves at intervals of 6 months. This is done by turning the valve head in direction indicated.
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5.9 Return temperature limiter FJVR (10-55°C)
The return limiter type FJVR automatically controls the return temperature from heating system.
The return temperature limiter should be set to the required maximum return temperature, in compliance with the local demands. Factory setting: 3.
5.10 Fitting piece
The flatstation is equipped with a fitting piece for energy meter.
Mounting of energy meters:
1: Close ball valves
Close the ball valves on DH Supply and DH Return, if there is water on the system.
2: Loosen nuts
Loosen the nuts on the fitting piece.
3: Remove fitting piece
Remove the fitting piece and replace it with the energy meter. Do not forget the gaskets.
4: Tighten connections
After mounting of the energy meter remember to check and tighten all threaded connections.
5.11 Mounting bracket
Monting bracket for the heat meter display
The heat meter display can be fixed on the mounting bracket which normally must be ordered separately. Check your heat meter supplier for more informations.
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5.12 Sensor pocket, energy meter
The flow sensor of the heat meter is installed in the rear opening (M10).
The sensor connection is located in the cross piece, where the filter is also integrated.
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6.0 MAINTENANCE
The flat station requires little monitoring, apart from routine checks. It is recommended to read the energy meter at regular intervals, and to write down the meter readings.
Regular inspections of the flat station according to this Instruction are recommended, which should include:
Strainers
Cleaning of strainers.
Meters
Checking of all operating parameters such as meter readings.
Temperatures
Checking of all temperatures, such as HS supply temperature and PWH temperature.
Connections
Checking all connections for leakages.
Safety valves
The operation of the safety valves should be checked by turning the valve head in the indicated direction.
Venting
Checking that the system is thoroughly vented.
Inspections should be carried out minimum every two years.
Spare parts can be ordered from Danfoss.
Please ensure that any enquiry includes the flat station serial number.
Authorized personnel only
Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.
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7.0. TROUBLESHOOTING
7.1 Troubleshooting in general
6.1 Troubleshooting in general
In the event of operating disturbances, the following basic features should be checked before carrying out actual troubleshooting:
•the flat station is connected to electricity,
•the strainer on the HS supply pipe is clean,
•the supply temperature of the HS is at the normal level,
•the differential pressure is equal to or higher than the normal (local) differential pressure in the HS network – if in doubt, ask the HS plant supervisor.
7.2 Troubleshooting: DHW
Authorized personnel only
Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.
Problem |
Possible cause |
Solution |
|
|
|
Too little or no domestic hot water |
Supply flow insufficient |
Collect data from the heat meter |
|
|
|
|
|
Check the network pump - constant pressure |
|
|
|
|
|
If necessary, close the bypass in the tap block |
|
|
|
|
|
Check the function of the ball valves and |
|
|
open if necessary |
|
|
|
|
|
Vent the system throughly - see the instruc- |
|
|
tion |
|
|
|
|
|
Change the summer bypass setting if neces- |
|
|
sary |
|
|
|
|
Low temperature / variations in tempera- |
Collect data from the heat meter |
|
ture at the draw-off points |
|
|
|
Change the positioning time of the mixer |
|
|
actuator |
|
|
Change the heating curve if necessary |
|
|
|
|
|
Position the switch-on sensor correctly on the |
|
|
buffer line |
|
|
Change cleaning periods for biomass boilers |
|
|
|
|
Strainer in the cold water supply line |
Clean strainer |
|
clogged. |
|
|
Circulation pump out of operation , set at |
Check the function of the circulation pump |
|
too low speed of rotation (if DHW circula- |
and replace if required |
|
tion is established) |
|
|
Non-return valve defective or clogged (if |
Check the functioning of the non-return valve |
|
DHW circulation is established) |
and replace if required |
|
Defective DHW thermostat |
Check the functioning of the DHW thermo- |
|
|
stat and repace if necessary |
|
|
|
|
Defective TPC-M controller |
Check the functions of the controller, |
|
|
and replace if required |
|
Calified heat exchanger |
Replace heat exchanger |
|
|
|
|
Lack of cold water pressure |
Increase pressure |
|
|
|
DHW is available only at some draw-off |
Defective thermostatic mixing valve |
Replace thermostatic mixing valve |
points. |
|
|
|
|
|
DHW temperature too high |
DHW controller |
Adjust controller |
|
|
|
|
DHW controller defective |
Check the functions of the controller, |
|
|
and replace if required |
|
|
|
Temperature drop during tapping. |
Larger DHW flow than the flat station has |
Reduce DHW flow |
|
been designed for. |
|
|
|
|
|
|
|
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7.3 Troubleshooting HE
Problem |
Possible cause |
Solution |
|
|
|
Too little or no heat. |
Strainer in supply line clogged |
Clean strainer(s) |
|
|
|
|
The filter in the energy meter clogged. |
Clean the filter |
|
|
|
|
Defective differential pressure controller. |
Replace main controller, TPC |
|
|
|
|
Defective temperature sensors. |
Replace thermostat |
|
|
|
|
Automatic controls, if any, wrongly set or |
Check if the setting of the controller |
|
defective - possibly power failure. |
is correct – set coorectly or replace |
|
|
|
|
Pump out of operation. |
Check if the pump is receiving power |
|
|
and that it turns. Check if there is air |
|
|
trapped in the pump housing. |
|
|
See pump manual |
|
|
|
|
The pump is set at too low speed of |
Set the pump at higher speed of rotation. |
|
rotation. |
See pump manual. |
|
|
|
|
Air pockets in the system. |
Vent the system throughly - see the |
|
|
instruction |
|
|
|
|
Defective radiator valves. |
Check – replace |
|
|
|
HS supply temperature too high. |
Defective TPC-M controller, alternative- |
Replace TPC-M controller |
|
ly differential pressure controller. The |
|
|
controller does not react as it should |
|
|
according to the instructions. |
|
|
|
|
Noise in system. |
Pump pressure too high. Noice from |
Adjust pump to a lower level. Check flow |
|
radiator valves. |
direction. |
|
|
|
|
Mass flow below the control range |
Reduce the spread and thereby increase |
|
|
the mass flow |
|
|
|
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EvoFlat |
Too high HS return temperature.
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 |
Make sure the heat is distributed evenly |
surface. |
across the full heating surface – open all |
Defective sensor on self-acting thermo- |
radiators and keep the radiators in the |
stat. |
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. |
The system should be equipped with |
|
electronic controls and return sensors. |
|
|
Pump pressure too high. |
Set the pump at a lower speed of rota- |
|
tion. See pump manual. |
|
|
Air in system. |
Vent the system throughly - see the |
|
instruction |
|
|
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 control- |
Check – clean out. |
ler. |
|
|
|
Defective motorized valve, sensor or |
Check – replace. |
automatic controller. |
|
|
|
7.4 Disposal
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.
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8.0DECLARATION
8.1Declaration of conformity
Category 0 with electrical equipment
EU DECLARATION OF CONFORMITY
Danfoss Redan A/S
Hårupvænget 11
DK-8600 Silkeborg
Denmark
declares on our sole responsibility that the product(s)
EvoFlat
Covered by this declaration is in conformity with the following directive(s), standard(s) or other normative document(s), provided that the product is used in accordance with our instructions.
EMC – Directive – 2004/108/EC
EN 61000-6-1 2007. Electromagnetic compatibility – General standard:
Immunity for residential, commercial and light industry
EN 61000-6-3 2007. Electromagnetic compatibility – Generic standard:
Emission for residential, commercial & light industry.
Pressure Equipment Directive – 97/23/EC
Equipment category: 0 (article 3.3).
Silkeborg - 08-10.2014
Place and date of issue
Machinery Directive 2006/42/EC
EN 14121-1. Safety of machinery – Risk assessment
EN 60204-1. Safety of machinery – Electrical equipment of machines – Part 1:
General requirements.
Henrik Daugaard
Thomas Bruun Hansen
26 | © Danfoss | Produced by Danfoss Redan A/S | 2020.12 |
AQ15928645880503-020501 |
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