Danfoss EvoFlat Flat Stations Operating guide [de]
Mounting and installation instructions
EvoFlat Flat Stations for apartments,
single- and multi-family houses
Complete heat-insulated flat stations for direct heating and instantaneous domestic hot water
EvoFlat
Flat Stations for apartments, single- and
multi-family houses
Mounting and installation instructions EvoFlat
EvoFlat FSS
EvoFlat WSS , with circulation
EvoFlat MSSEvoFlat WSS
EvoFlat MSS, with circulationEvoFlat FSS, with circulation
1. CONTENT
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
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Mounting and installation instructions EvoFlat
2.0 SAFETY NOTES
2.1 Safety 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.
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
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.
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.
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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.
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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.
Authorized personnel only
Assembly, start-up and maintenance work must be
performed by qualified and authorized personnel
only.
Keyhole for mounting.
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.
Please notice
Use of packaging types other than that with which the
device is delivered will void the warranty.
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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.”.
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 com-
pletely pushed in.
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.
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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.
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Mounting and installation instructions EvoFlat
4.0. MAIN COMPONENTS & DIMENSIONAL SKETCHES
4.1 Construction WSS
17
38
2
23
59
Main components
WSS 1, 2, 3
2. Plate heat exchanger
5. Strainer
17. Air valve
23. Sensor pocket M10
24. Fitting piece, energy meter
38 DHW controller type TPC-M
40. Summer by-pass
59. Fitting piece, water meter
40
17
40
38
2
23
5
24
12
7
59
9
Main components
WSS 1, 2, 3, with circulation
2. Plate heat exchanger
5. Strainer
6. Non-return valve
7. Ball valve
6
9. Circulation pump
12. Safety valve
17. Air valve
23. Sensor pocket M10
24. Fitting piece, energy meter
38 DHW controller type TPC-M
40. Summer by-pass
59. Fitting piece, water meter
5
24
575
1 2 3 4 5
65 65 65 65 112
545
Your flat station might look different than the substation shown.
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588,4
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1 2
1. Domestic cold water (DCW)
1 Kaltwasser (KW) Eintritt
2 Warmwassser (WW)
2. Domestic hot water (DHW)
3 Kaltwasser (KW) Austritt
3. Domestic cold water (DCW)
4 Fernwärme (FW) Vorlauf
5 Fernwärme (FW) Rücklauf
4. District heating (DH) supply
6 Heizung (HE) Vorlauf
5. District heating (DH) return
7 Heizung (HE) Rücklauf
6. Circulation
6
3 4
582
5 6
7
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105,4
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Mounting and installation instructions EvoFlat
4,2 Diagrams, WSS
WSS 1, 2, 3
DHW
DCW
DCW
DH Supply
2. Plate heat exchanger
5. Strainer
23. Sensor pocket M10
24. Fitting piece, energy meter
33. Plug
38 DHW controller type TPC-M
40. Summer by-pass
59. Fitting piece, water meter
3/4” × 110 mm
3/4” × 110 mm
DH return
WSS 1, 2, 3, with circulation
DHW
DCW
DCW
Circulation
DH supply
2. Plate heat exchanger
5. Strainer
6. Non-return valve
7. Ball valve
9. Circulation pump
12. Safety valve
23. Sensor pocket M10
24. Fitting piece, energy meter
33. Plug
38 DHW controller type TPC-M
40. Summer by-pass
59. Fitting piece, water meter
Yonos Para Z 15/7
3/4” × 110 mm
3/4” × 110 mm
DH return
Your flat station might look different than the substation shown.
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Mounting and installation instructions EvoFlat
4.3 Construction FSS, Standard
17
40
38
2
23
5
59
Main components
FSS 1, 2, 3
2. Plate heat exchanger
5. Strainer
17. Air valve
23. Sensor pocket M10
24. Fitting piece, energy meter
38 DHW controller type TPC-M
40. Summer by-pass
59. Fitting piece, water meter
24
12
17
40
38
2
23
5
59
9
7
Main components
FSS1, 2, 3 with circulation
2. Plate heat exchanger
5. Strainer
6. Non-return valve
6
7. Ball valve
9. Circulation pump
12. Safety valve
17. Air valve
23. Sensor pocket M10
24. Fitting piece, energy meter
38 DHW controller type TPC-M
40. Summer by-pass
59. Fitting piece, water meter
24
545
44
105,4
575
112 65 65 65 65 65 65
1 2 3 4 5 6 7
Your flat station might look different than the substation shown.
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1 2
1. Domestic cold water (DCW)
2. Domestic hot water (DHW)
3. Domestic cold water (DCW)
4. District heating (DH) supply
5. District heating (DH) return
6. HE supply
7. HE return
8. Circulation
8
3 4
5 6
1 Kaltwasser (KW) Eintritt
2 Warmwassser (WW)
3 Kaltwasser (KW) Austritt
4 Fernwärme (FW) Vorlauf
5 Fernwärme (FW) Rücklauf
6 Heizung (HE) Vorlauf
7 Heizung (HE) Rücklauf
591
44
7
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Mounting and installation instructions EvoFlat
4.4 Diagrams, FSS Standard
FSS 1, 2, 3
2
27
DHW
38
DCW
2. Plate heat exchanger
5. Strainer
23. Sensor pocket M10
24. Fitting piece, energy meter
27. Temperature sensor DHW
38 DHW controller type TPC-M
40. Summer by-pass
59. Fitting piece, water meter
3/4” × 110 mm
3/4” × 110 mm
DCW
59
DH supply
24
DH return
FSS 1, 2, 3, with circulation
DHW
DCW
DCW
23 5
40
HE supply
HE return
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
38 DHW controller type TPC-M
40. Summer by-pass
59. Fitting piece, water meter
MW 0,6 mm
Yonos Para Z 15/7
3/4” × 110 mm
3/4” × 110 mm
Circulation
DH supply
DH 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
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HE supply
HE return
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Mounting and installation instructions EvoFlat
4.5 Construction, MSS Standard
38
17
23
40
5
29
30
17
40
38
2
23
5
29
30
2
6
54
59 24
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
10
12
59
9
7
MSS 1, 2, 3 with circulation
2. Plate heat exchanger
5. Strainer
6. Non-return valve
7. Ball valve
9. Circulation pump, circulation
10. Circulation pump, mixing circuit
6
12. Safety valve
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
545
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425
24
54
10
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1 2
3 4
5 6
7
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Your flat station might look different than the substation shown.
12 | © Danfoss | Produced by Danfoss Redan A/S | 2020.12
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554,4
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65 65 65 65 65 65 43
3 4
1 2
1. Domestic cold water (DCW)
2. Domestic hot water (DHW)
1 Kaltwasser (KW) Eintritt
3. Domestic cold water (DCW)
2 Warmwassser (WW)
4. District heating (DH) supply
3 Kaltwasser (KW) Austritt
4 Fernwärme (FW) Vorlauf
5. District heating (DH) return
5 Fernwärme (FW) Rücklauf
6. HE supply
6 Heizung (HE) Vorlauf
7. HE return
7 Heizung (HE) Rücklauf
8. Circulation
8
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Mounting and installation instructions EvoFlat
4.6 Diagrams, MSS Standard
MSS 1, 2, 3
DHW
DCW
DCW
2 Plate heat exchanger
5 Strainer MW 0,6 mm
6 Non-return valve
10
Circulation pump mixing circuit
Wilo Para 15/6
23
Sensor pocket
24
Fitting piece for energy meter
3/4” x 110 mm
29 Actuator
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
M10
DH supply
DH return
MSS 1, 2, 3, with circulation
DHW
DCW
DCW
Circulation
DH supply
2 Plate heat exchanger
5 Strainer MW 0,6 mm
6 Non-return valve
7 Ball valve
9 Circulation pump:
Yonos Para Z 15/7
10
Circulation pump mixing circuit
Wilo Para 15/6
12 Safety valve
HE supply
HE return
23
Sensor pocket
24
Fitting piece for energy meter
3/4” x 110 mm
29 Actuator
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
M10
HE supply
DH 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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HE return
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Mounting and installation instructions EvoFlat
4.7 Construction, FSS & MSS A
Your flat station might look different than the substation shown.
Main components
FSS A1, A2, A3
17
17
MSS A1, A2, A3
2. Plate heat exchanger
5. Strainer
17. Air valve
21. Return temperature limiter
23. Sensor pocket M10
24. Fitting piece, energy meter
38 DHW controller type TPC-M
40. Summer by-pass
58. Fitting piece, water meter DHW
59A. Fitting piece, water meter DCW inlet
59B. Fitting piece, water meter DCW outlet
64. Flow limiter
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
58. Fitting piece, water meter DHW
59A. Fitting piece, water meter DCW inlet
59B. Fitting piece, water meter DCW outlet
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Mounting and installation instructions EvoFlat
4.8 Diagrams, FSS & MSS A
FSS A1, A2, A3
DHW
DCW
DCW
DH supply
DH return
MSS A1, A2, A3
DHW
DCW
DCW
HE supply
HE return
DH supply
DH return
Your flat station might look different than the substation shown.
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HE supply
HE return
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Mounting and installation instructions EvoFlat
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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Mounting and installation instructions EvoFlat
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.
Authorized personnel only
Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.
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.
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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
Problem Possible cause Solution
Too little or no domestic hot water Supply flow insufficient Collect data from the heat meter
Authorized personnel only
Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.
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 instruction
Change the summer bypass setting if necessary
Low temperature / variations in temperature at the draw-off points
Strainer in the cold water supply line
clogged.
Circulation pump out of operation , set at
too low speed of rotation (if DHW circulation is established)
Non-return valve defective or clogged (if
DHW circulation is established)
Defective DHW thermostat Check the functioning of the DHW thermo-
Defective TPC-M controller Check the functions of the controller,
Calified heat exchanger Replace heat exchanger
Lack of cold water pressure Increase pressure
DHW is available only at some draw-off
points.
DHW temperature too high DHW controller Adjust controller
Defective thermostatic mixing valve Replace thermostatic mixing valve
Collect data from the heat meter
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
Clean strainer
Check the function of the circulation pump
and replace if required
Check the functioning of the non-return valve
and replace if required
stat and repace if necessary
and replace if required
DHW controller defective Check the functions of the controller,
Temperature drop during tapping. Larger DHW flow than the flat station has
been designed for.
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and replace if required
Reduce DHW flow
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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
defective - possibly power failure.
Pump out of operation. Check if the pump is receiving power
Check if the setting of the controller
is correct – set coorectly or replace
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
rotation.
Air pockets in the system. Vent the system throughly - see the
Defective radiator valves. Check – replace
HS supply temperature too high. Defective TPC-M controller, alternative-
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
radiator valves.
Mass flow below the control range Reduce the spread and thereby increase
Set the pump at higher speed of rotation.
See pump manual.
instruction
Replace TPC-M controller
Adjust pump to a lower level. Check flow
direction.
the mass flow
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Too high HS return temperature. Too small heating surface/too small
radiators compared to the total heating
requirement of the building.
Poor utilization of existing heating
surface.
Defective sensor on self-acting thermostat.
The system is single pipe loop. The system should be equipped with
Pump pressure too high. Set the pump at a lower speed of rota-
Air in system. Vent the system throughly - see the
Defective or incorrectly set radiator
valve(s). Single pipe loop systems require
special one-pipe radiator valves.
Dirt in the differential pressure controller.
Defective motorized valve, sensor or
automatic controller.
Increase total heating surface.
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.
electronic controls and return sensors.
tion. See pump manual.
instruction
Check – set/replace.
Check – clean out.
Check – replace.
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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8.0 DECLARATION
8.1 Declaration 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 compati-
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.
bility – 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 Henrik Daugaard
Thomas Bruun Hansen
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