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Danfoss DSA 1 MINI Operating instructions

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Installation Guide
DSA 1 MINI
1
Danfoss District Energy VM.HE.B3.02 DEN-SMT/PL
1.0 Table of contents ............................................................................................................................................................................................................................................................1
2.0 Safety note .........................................................................................................................................................................................................................................................................2
3.0 Storage and Handling ..............................................................................................................................................................................................................................................5
4.0 Disposal ........................................................................................................................................................................................................................................................................5
5.0 Diagrams ..........................................................................................................................................................................................................................................................................6
6.0 Mounting ...........................................................................................................................................................................................................................................................................7
7.0 Installation and Start-up ........................................................................................................................................................................................................................................8
7.1 Heat transfer medium treatment ...........................................................................................................................................................................................................8
8.0 Commissioning .............................................................................................................................................................................................................................................................9
9.0 Electrical installation ..............................................................................................................................................................................................................................................10
9.1 Electrical diagrams ........................................................................................................................................................................................................................................11
10.0 Maintenance ...............................................................................................................................................................................................................................................................13
11.0 Troubleshooting .......................................................................................................................................................................................................................................................14
12.0 EC - Declaration of conformity .......................................................................................................................................................................................................................17
Contents
Danfoss District Energy DSA 1 MINI -
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DEN-SMT/PL VM.HE.B3.02 Danfoss District Energy
2.0 Safety note
This section provides you with an overview of all relevant
safety aspects for optimum protection for you and your
personnel and the safe and fault-free operation of the unit.
The individual sections also contain specic, symbol-
-identied safety notes for averting immediate dangers.
General
The unit is built in accordance with the sound engineering
practise and follow all relevant EU regulations applicable
at the time of its development and production. The unit
can, however, entail dangers if it is used by unskilled or not
properly trained personnel or is used improperly or not as
intended.
Every person assigned to work on or with the unit must
therefore have read and understood the operating
instructions before the work begins. The operator is
recommended to have all relevant personnel conrm the
understanding of the operating instructions in writing.
Changes of any kind and additions to or conversions on
the unit are strictly forbidden, and all warranty and product
responsibly will on longer by covered by Danfoss District
Energy.
Operator/owner’s responsibility
• Alwayskeepoperatinginstructionsclosetotheunitand
accessible for the installation, operating, maintenance
and cleaning personnel at all times.
• Onlyoperatetheunitwithintheproductspecied
pressure and temperature limits.
• Alwayskeepsafetydevicesfreelyaccessibleandcheck
regularly.
The information on safety at work applies to the European
Union ordinances and is applicable at the time the unit is
produced. The operator is obliged to determine the compli-
ance of the safety at work rules and regulations and must
observe and updated if new regulations is adopted by the
EU during the entire time of the unit’s life time.
OutsidetheEUtheapplicablesafetyatworklegislation
and regional provisions and regulations must be complied.
In addition to the safety at work, notes in these operating
instructions, and the generally applicable safety, accident-
prevention and environmental protection regulations must
be observed and complied with for the specic area of
application.
The operator and the authorised personnel are responsible
for the fault-free operation of the unit, and for the clear
denition of responsibilities with the unit’s installation,
operation, maintenance and cleaning. The information
provided in the operating instructions must be followed
in full and unrestricted!
The operator must also ensure that:
- Allresidualriskthatarisesasaresultfromthepointof
installation must be determined and minimized.
Safety note
Please always agree conversion and extension work
with the manufacturer.Allsafety,warningandoperating
notices on the unit must always be kept in an easy to
read condition. Damaged signs or stickers must be
renewed immediately. Given setting values or ranges
must be observed.
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Danfoss District Energy VM.HE.B3.02 DEN-SMT/PL
Proper use
The unit’s functional and operational safety is only guaran-
teed when used properly in accordance with the informa-
tion in this instruction.
Proper use also includes correct compliance with installa-
tion, operating, maintenance and cleaning instructions.
Anyotheruseoftheunitisforbiddenandapplies
as improper!
Claims of any kind against the manufacturer and/or their
agents for damages caused by improper use of the unit
shall be excluded. The operator and/or owner alone are the
sole responsible party for all damages caused by
improper use.
Safety at work
Adheringtothenotesonsafetyatworkdangerstopeople
and/or the system must be prevented. Ignoring or non-
-compliance with these notes can cause dangers to people
and property from mechanical eects or the failure of the
system and the entire workplace. Non-compliance with
safety regulations will result in the loss of all rights no
claims to damages.
Personal protection equipment
The following must personal protection equipment must be
worn when working on or with the unit:
• Protectivegloves for protecting the hands against
abrasion, grazes, or deeper injuries and against contact
with hot surfaces.
• Protectiveglasses for protecting the eyes against
ejecting parts and hot liquid splashes.
• Safetyshoes for protecting against falling parts and
slipping on slippery surfaces.
Safety note
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DEN-SMT/PL VM.HE.B3.02 Danfoss District Energy
Residual risks
Possibleharm!Dangerofburns.
Hot surfaces can cause serious burn injuries. Wear
protective gloves when working on the unit!
The unit can have sharp edges and corners.
Possibleharm!Sharp-edgedmountingplateand
brackets and pointed corners can cause cuts.
Wear protective gloves when working on the unit!
The unit weighs app. 50-50kg.
Possibleharm!Dangerofcrushing.
Heavy weights can cause crushing dangers when
transporting, including with lifting gear.
The unit works with high voltages 230/240
Vac50Hzandamaximumcurrenton6A.
PossibleHarmcausedbyelectricalcurrent!
The electrical forces can cause fatal injuries.
Damage on insulation or individual components
can endanger life.
– Switch main switch o (1F1) or disconnect supply,
before maintenance, cleaning or repair work and
secure or monitor against accidental or unintended
reengagement of the power supply.
– Do not remove any safety components or put
them out of service.
2.1 Residual risk
The unit has undergone a risk analysis as required by
the Machinery directive and is preformed according to
En14121. The unit design complies with the current state of
techno logy. Nonetheless there are residual risks! The unit
generates a strong liquid jet when opening the draining or
venting components, for example.
Possibleharmcausedbyliquidsquirting
underhighpressure.
Wear personal protection equipment
with all work on the unit.
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3.0Storageandhandling
If the substation is stored before installation, make sure that
the place is dry and heated. (Humidity max. 60 % and
storage temperature 5-70 °C).
Do not stack the unit higher than factory shipped.
Units that are shipped in cardboard packaging are to be
lifted by the carrying handles of the packaging.
Transport/removals over great distances should be carried
out on pallets.
During and after unpacking, the substation can be lifted
by using straps, tted around the pipes or it can be lifted
by hand in the pipes. Lifting in the pipes can cause leaks.
ALWAYSre-tighten.
4.0Disposal
Storage and handling / disposal
HANDLING
When working on the substation suitable
safety shoes must be worn.
DH Standard 501L0278
Disposal instructions in DH-literature
1st issue, 2008-02
Page 1 of 1
Approved by Senior Vice President – Troels H. Petersen Language: en
1 Scope and field of application
This standard shall be observed when new technical literature or changes are designed
for DH products. The standard is valid throughout DH.
2 Purpose
The standard shall describe the rules for implementing disposal instructions in technical
DH literature (Data sheet, Instruction, etc.).
3 Disposal instructions for electronic products
In spite of, that none of the electronic and electro-mechanical DH-products are within
the scope of WEEE, it has been decided to put a relevant standard text and a bin-symbol
in the technical literature for these products (see clause 5).
The text and the bin-symbol do not relate to the WEEE, but emphasizes that Danfoss is
an environmental friendly company. Please notice that bin symbol with registration
number, below the bin, should not be used.
4 Disposal instructions for other products than electronic
There are no legal requirements to have disposal instructions included in technical DH
literature like data sheets or instructions for non electronic and non electro-mechanical
products. Nevertheless we foresee that there will be requirements in the future.
In order to prepare ourselves we therefore have decided to add a general disposal in-
struction also in this product group (see clause 5).
5 General disposal instruction
Following general text in connection with the waste bin shall be implemented in all
technical literature for DH products:
Disposal instruction:
This product should be dismantled and its components
sorted, if possible, in various groups before recycling or dis-
posal.
Always follow the local disposal regulations.
Abbreviations
DH: District Heating
Changes in relation to previous issue:
This standard is completely new.
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DEN-SMT/PL VM.HE.B3.02 Danfoss District Energy
5.0Diagrams
1. External sensor
2. Thermometer
3. Manometer
3.* Manometer (optional)
4. District heating Return temperature sensor
5.Airvent
6. Drainage
7. Connection for primary DHW preparation
8.* Safety thermostat (available depending
on code number)
9. Connection to expansion vessel
10.Controller(StandardECL310.OptionECL210
orOPR0020
11. Strainer
12.* Heatmeter (Danfoss Sonometer)
(available depending on code number)
13. Ball valves
14. Safety valve
15. Heat exchanger Danfoss XB37M-1 10 to 50
16. Combined dierential pressure and ow controller
DanfossAVQMwithelectricalactuators
DanfossAMV10or20
16.* Combined dierential pressure and ow controller
DanfossAVQMwithelectricalactuators
DanfossAMV13or23(availabledepending
on code number)
Application
TheDSA1MINIisdesignedforuseindistrictheating
networks.DSA1MINIisperfectforuseinbothmicroand
macro networks and also in Low temperature (LT) and High
temperature(HT)range.TheDSA1MINIisfurthermore
available both in a high pressure version (PN25) and low
pressure version (PN16).
Diagrams
3*
3*
16
3
10
15
12
13
13 13
1311
11
Primary
supply
Secondary
supply
Primary
return
Secondary
return
3* 2
2
12 7
6 6
4
14 3 2
9
7
16
3* 5 5
15
10
1
*
*
4 8
*
MI TI M MI TI
MI TI
Q
TI
TE
3*
MI
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Danfoss District Energy VM.HE.B3.02 DEN-SMT/PL
6.0Mounting
Connection options
Primary and secondary
Aminimumdistanceof50cmabovetheDSA1miniDistrictHeatTransferStationmustbe
observed to perform electrical work and further maintenance work.
Mounting
Power
in kW
Model Connection dimension prim./sec.
Weight
in kg
Dimensions in mm
H W D
16 DSA1mini G1” PN16 (25) / Rp 1” PN6 50 1000 700 420
30 DSA1mini G1” PN16 (25) / Rp 1” PN6 51 1000 700 420
42 DSA1mini G1” PN16 (25) / Rp 1” PN6 52 1000 700 420
60 DSA1mini G1” PN16 (25) / Rp 11/2” PN6 53 1000 700 420
75 DSA1mini G1” PN16 (25) / Rp 11/2” PN6 55 1000 700 420
90 DSA1mini G1 1/4”” PN16 (25) / Rp 11/2” PN6 58 1000 700 420
The stations have weld sleeves on the primary-side.
H
B
T
50 cm (recommended)
STANDARD PRODUCT
A Primary supply
B Primary return
C Secondary return
D Secondary supply
Option 1: BOTTOM AND TOP
C Secondary return
D Secondary supply
Option 2: RIGHT SIDE
C Secondary return
D Secondary supply
Connections: Tolerances ± 2 mm
Connections for 16/30/42/60 kW Connections for 75 kW
312 125 312 125 70
68 100 127 125 88100 124 125
70
360 125
360 125
C D C D
C
D
C
D
A B C D B A C D
Connections for 90 kW
312 125
C D
360 125
C
D
B A C D
68 120 124 125
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DEN-SMT/PL VM.HE.B3.02 Danfoss District Energy
Installation and commisioning
7.0Installationandstart-up
The unit may only be installed and commissioned by skilled
personnel that are experienced in installation, commission
andoperatingoftheDSAproductseries.Propertransport
and professional storage must be ensured.
The controller is intended for use in high voltage systems
(230/240 Vac; 50 hz). Safety regulations must be observed
to ensure a safe installation, operation and maintenance.
The following must be observed before initial installation:
1. Flush out pipes (use side dummy plugs on primary line).
2. Fill the feed line rst before slowly lling the return line.
7.1 Heat transfer medium treatment
Water in the heating system is primarily used as a heat
transfer medium and therefore plays a decisive role in
the safety and a fault-free system operation. The proper
preparation of the respective water is, however, often
simply forgotten. The Danfoss standard Guideline of Water
QualityforcopperbrazedPlateHeatExchangersvery
precisely regulates how, the heating medium is optimised
to ensure the product life time.
The consequential damage of not preparing or incorrect
preparation is often expensive for the system operator,
whereby the overall costs of a system interruption cannot
be estimated. Corrosion and general deposits/build-ups in
combination with oxygen cause red rust, which sticks to the
walls and in plastic pipes and causes cross section reduc-
tions, and in many cases ow constriction or interruption.
The consequences:
• Higherenergyconsumption
• Defectivethermostatvalves
• Defectivecontrolunits
• Blockingpumps
• Damageontheheatexchanger
• Boilingnoises
• Localisedcorrosion
• Defectiveheatmeters
Proper water preparation provides extensive system safety
points, ranging from improved operation cost, prevention
of defect components, corrosion damage and reduced
maintenance costs.
Yourinstallationengineerwillbehappytoadviseyou!
Danfoss District Energy DSA 1 MINI -
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Danfoss District Energy VM.HE.B3.02 DEN-SMT/PL
Commissioning
8.0Commissioning
DanfossDistrictEnergyDSA1MINI
TheDanfosDistrictEnergyDSA1MINIStationisthelink
between the district heating supplier and the district heat
recipient.Allsystempartsmustbecheckedandharmonized
with one another to meet the district heating supplier and
the district heat recipient’s requirements.
It is important that the all relevant technical guidelines of
the local district heating supplier is applied and followed
to ensure correct installation of the primary-side in the
building supply section. The work must only be performed
by skilled personnel.
It must also be ensured that an easy accessible installation
point is selected for the district heating transfer station.
The relevant technological rules and regulations, in
particular the applicable standards, or where these are not
provided the applicable EN standards, must be complied
with.
DearCommissioningEngineers!
ThisDanfossDistrictEnergyDSA1MINIstationischeckedin
the factory for leaks before delivery. Leaks are however
possible due to the vibration caused by transport. Therefore
it is impotent to retightening before commissioning!
Therearenowarrantiesgivenforsealsandwearand
tear parts.
Connections re-tightened
date:
installer:
Danfoss District Energy DSA 1 MINI -
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DEN-SMT/PL VM.HE.B3.02 Danfoss District Energy
Electrical instructions
9.0Electricalinstallation
WhencablingandconnectingtheDSA1MINItheIEC
regulations and the regulations of local power supply
companies must be observed. This work must therefore
only be performed by skilled personnel.
TheDanfossDistrictEnergyDSA1MINIstationisalready
wired ready in the factory.
The electrical connection is performed in acc. with the
terminals plan of the installed controller.
OnlyusePT1000versionsensors.
TheDanfossDistrictEnergyDSA1MINImainsconnection
shall be performed via the earth leakage circuit breaker
installedintheconnectionbox(1F16A).
If a data transfer system (Danfoss Energy control system
DECS 2.0 or local Building management system) is installed
in the district heating network, a cable connection
(2 × 2 × 0.5 mm² shielded and twisted) must be used.
The heatmeter connection includes the voltage supply
of 230 V and a data communication bus cable (2 × 0.5 mm²
shielded) from the meter’s bus connection to the Danfoss
DistrictEnergyDSA1MINI)
Lightningprotection:
It is recommended that an transient protection module
with coarse and ne protection is installed, especially in
thesupplycablefortheDSA1MINIs.
If the transient protection module is not available or not in-
stalled, the customer must be informed about the increased
risk of direct and indirect lightning.
5SAFETYRULES
1. Disconnect L1 and N before work!
2. Secure or monitor against reengagement power!
3. Check there is no voltage present!
4. Protect from adjacent voltage-carrying parts!
5. Follow the general electrical safety rules
Danfoss District Energy DSA 1 MINI -
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Danfoss District Energy VM.HE.B3.02 DEN-SMT/PL
9.1Electricaldiagrams
9.1.1DanfossECL310ControllerwithapplicationkeyA337,A347,A367,A377
Electrical diagrams
Danfoss District Energy DSA 1 MINI -
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DEN-SMT/PL VM.HE.B3.02 Danfoss District Energy
Wiring diagram
9.1.2DanfossControllerOPR0020Wiringdiagram
OPR0020Factory-setting:
Circuit 1: Heating circuit, radiators or high temperatures (fans)
Circuit 2: Mixing circuit for radiators
Circuit 3: Mixing circuit for under oor heating
Circuit 4: Boiler
Pump 1 Heating
circuit 1 or boiler 2
N L
Motor 1 Mix Heating
A = Off
Z = On
Pump 2 heating
circuit 2
Pump 3 Heating
circuit 3
Pump 4 heating circuit 4
or boilerpump boiler 1
N LN Z AN LN LN L N Z AN Z AN Z A
Motor 2 Mix Heating
A = Off
Z = On
Motor 3 Mix Heating
A = Off
Z = On
Motor 3 Mix Heating
ZU = ON; Domestic hot water pump
Boiler 1 for chargingmodule
AUF = Off,
N LN L
Supply heat meter 230VAC
(Is NOT powered via the glass fuse)
Glass tube fuse 3.15A
Mains 230VAC
PE = Protecting earth
N = Null
L = phase
K3
K4
K5
K6
K7
K8
K9
K10
K3
Rel1Rel3Rel4Rel5Rel6Rel7Rel8Rel9Rel10Rel11Rel12 Rel2
F4
XL1
BAT1
Controller reset
Lon-reset
Lon-service
XL4
Connection for
Communication
LON, TCP/IP or GPRS
K3
K3
K3
K3
K3
K3
K3
K3
K3
K3
K3
K3
K3
AB LonBus IN
AB LonBus OUT
FB; Remote control - 2pole shielded
(max. 4 pc)
XL19
XL3
XL2
K1
K2
Seriel connector
BB AA
DISP; Display (max 2 pc/on FB)
MB; Mbus - Heat meter (2pole shielded)
AT; Outdoor temperature sensor
RL; Return temperature sensor
VL1; Secondary Supply temperature
sensor
VL2; Supply temperature sensor 2.
circuit
VL3; Supply temperature sensor 3.
circuit
BO1; Boiler sensor Boiler 1 top, or
supply temp. circuit 4
PE; Pe for cable shield
BO2; Boiler sensor Boiler 2 bottom,
or potintial free relay
Ok; OUT open collector output
Ok; OUT open collector output
OK4
OK3
12V
OK2
OK1
12V
TR1
1
2
Jumper
Reserve
3
4
Adress
Nopro Cemote control
4-20mA
0-10V jumper
4-20mA
0-10V
GND
Controller
B02 +
Controller
B02 -
Use Jumpers to address heating circuit
(Visible on circuit board)
Note:
Do not connect temperature sensors to other connectors than the intended.
Use only PT 1000 temperature sensors. Use only shielded wires for the communication
cabels. Ensure correct polarity + and - for the display and remote control.
Do not connect other secondary modules than Nopro modules
Nopro expansion
module
XL1
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Danfoss District Energy VM.HE.B3.02 DEN-SMT/PL
Maintenance plan
10.0 Maintenance
Maintenance work
Is only to be carried out by qualied and authorised
personnel.
Inspection
The operator or other authorised personnel is obliged to
perform inspections at regular intervals and if necessary
carry out maintenance work according to these and other
instructions. Within the scope of the above maintenance
work all strainers should be cleaned, all connections should
be tightened and the operation of the safety valves should be
checked by turning the valve head in the indicated direction.
Rinsing/cleaningofplateheatexchanger
Brazed heat exchangers can be rinsed. For optimum cleaning
the ow rate should be a min. of 1.5 times normal ow rate,
preferably in back-ush mode. This will remove any deposits
formed on the inside of the plate heat exchanger. In case of
more serious deposits, a cleaning liquid, approved by
Danfoss (f.ex. Kaloxi or Radiner FI) can be pumped through
the heat exchanger. Both are environmentally friendly
cleaning uids and can be disposed of through the usual
domesticseweragesystem.Afterwardsrinsethoroughly
with large amounts of water.
Deacidicationofplateheatexchanger
Afterlongoperation,becauseoftherelativelyhigh
temperatures in the plates or tubes, the heat exchangers are
expeciallysubjecttocalication.Anydeacidicationofthe
plate heat exchanger is done as shown on the drawing to the
right. For brazed plate heat exchangers weak inhibited acid
solutions (e.g. 5% formic, acetic or phosphoric acid) may
be used.
Measures after maintenance work
Aftermaintenanceworkandbeforeswitchingthesystem
on again:
– 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.
– Make sure that all tools, materials and other quipment that
were used, have been removed from the working area.
– Connect to energy supply and check for leaks.
– Vent the system.
– If necessary adjust the system again.
– Make sure that all safety features on the device and the
system work properly.
Forthejanitororothersupervisors
Meterreading
It is recommended to read the heat meter at regular
intervals, and to write down the meter readings.
Cooling/Returntemperaturereading
The cooling, i.e. the temperature dierence between district
heating supply and district heating return is of great impor-
tance for the total heat economy. It is therefore very impor-
tant to observe the supply and return temperatures. Normal
temperature dierence is 30-35 °C.
Pleasenote,that the lowest district heating return tempera-
ture is directly dependent on the return temperature from
the heating circuit and the cylinder circuit. Therefore, please
observe these return temperatures.
Tighteningofconnections
When reading the heat meter, all ttings and connections
should be checked for leaks. If leaks are detected, contact
qualied and authori-zed personnel immediately.
Please note that the connections may be supplied with
EPDM rubber gaskets - in general connection sizes
from ¾” to and incl. 1½” for Kompakt H stations.
Thereforetakecarenottooverstraintheunionnuts,
asthismayresultinleaks. The manufacturer accepts no
liability for leaks that result from overstrain of union nuts.
Danfoss District Energy DSA 1 MINI -
14
DEN-SMT/PL VM.HE.B3.02 Danfoss District Energy
11.0Troubleshooting
If operating disturbances occur, the following basic features
should be checked before carrying out actual troubleshooting:
- the substation is connected to electricity,
- the strainer on the district heating supply is clean,
- the district heating ow temperature is at normal level
(summer at least 60 °C, winter at least 70 °C),
- the dierential pressure is higher than or equal to the normal
(local) dierential pressure in the district heating network. -
If in doubt, ask the district heating plant,
- there is pressure on the system.
11.1Troubleshooting-Heating
Troubleshooting
Problem Possible cause Solution
No heat
Strainer clogged on DH og HE side
(radiator circuit).
Clean strainer.
Filter in district heating meter clogged.
Clean the lter (after consulting the
district heating plant).
Defective dierential pressure controller.
Check the functions of the dierential
pressure controller - clean valve seat if
required.
Defective sensor Replace sensor
Defective actuator. Check the functioning of the actuator.
Defective motor valve - or possibly dirt
in the valve housing.
Check the functions of the motor valve -
clean valve housing if required.
Automaticcontrolswronglysetor
defective - possibly power failure.
Check if the setting of the controller is
correct - see separate instructions.
Check the power supply.
Temporary setting of actuator to “manual”
control - see instruction on heating
circuit, manual control.
Pump out of operation.
Check that the pump is receiving power
and that it runs. Control that there is
no air in the pump housing - see pump
manual.
The pump is set at too low speed of
rotation.
Set the pump at higher speed of rotation
- see instructions on heating circuit.
Airpocketsinthesystem. Vent the installation thoroughly.
Uneven heat distribution Airpocketsinthesystem. Vent the installation thoroughly.
Supply temperature too high
Wrong setting of automatic controls.
Adjustautomaticcontrols,seeinstructions
for automatic controls.
Defective sensor. Replace sensor.
Defective controller. The controller does
not react as it is should in accordance
with the instructions.
Call in automatic controls manufacturer
or replace controller.
Danfoss District Energy DSA 1 MINI -
1515
Danfoss District Energy VM.HE.B3.02 DEN-SMT/PL
Troubleshooting
Problem Possible cause Solution
No domestic hot water
Defective or wrongly set dierential
pressure controller.
Check the functions of the dierential
pressure controller - clean valve seat and
capillary tubes if required - air and rinse
capillary tubes.
Strainer on DH supply clogged. Clean strainer.
Defective actuator - or possibly dirt in
the valve housing.
Check the functions of the actuator -
clean valve seat if required.
Automaticcontrolswronglysetor
defective - possibly power failure.
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.
Calied heating element.
Clean DHW cylinder with acid solution or
replace heating element.
Inadequate cylinder capacity.
Wait for heating / loading of the cylinder.
Youmaycheckthespecicationsofthe
manufacturer conc. cylinder capacity.
11.2Troubleshooting-Domestichotwater
Problem Possible cause Solution
Supply temperature too low
Wrong setting of automatic controls.
Adjustautomaticcontrols,seeinstructions
for automatic controls.
Defective controller. The controller does
not react as it is should in accordance
with the instructions.
Call in automatic controls manufacturer
or replace controller.
Outdoorsensormountedorplaced
incorrectly.
Mount/place outdoor sensor correctly.
Poor cooling
Strainer clogged. Clean strainer.
Too small heating surface / too small
radiators compared to the total heating
requirement of the building.
Increase total heating surface.
Poor utilization of existing
heating surface.
Make sure that the heat is distributed
evenly across the full heating surface -
open all radiators and keep the radiator
in the system from heating up at the
bottom. Higher temperature at the top
and lower temperature at the bottom
part of the radiators means that the
system operation is correct.
The system is single - pipe.
It is extremely important to keep the
supply temperature to the radiators as
low as ever possible, while maintaining
a reasonable level of comfort.
Danfoss District Energy DSA 1 MINI -
16
DEN-SMT/PL VM.HE.B3.02 Danfoss District Energy
Troubleshooting
Problem Possible cause Solution
Not enough pressure on the hot water Strainer in cold water meter clogged.
Clean strainer - possibly in consultation
with the water supply company.
Long waiting time Circulation pump out of operation
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.
Temperature too low
See “No domestic hot water”. See “No domestic hot water”.
Non - return valve on the circulation line
defective (leads to mixing - and the
circulation water pipes become cold
during tapping).
Replace non - return valve.
Temperature too high
Defective actuator - possibly dirt in the
valve housing.
Check the functions of the actuator -
clean valve seat if required.
Automaticcontrolswronglysetor
defective.
Check if the setting of the controller is
correct, - see separate instructions.
Defective immersion sensor. Replace immersion sensor.
Variations in temperature
Non - return valve on the circulation line
defective (leads to mixing - and the
circulation water pipes become cold
during tapping).
Replace non - return valve.
Delcining temperature during tapping
Defective or wrongly set dierential
pressure controller (set too low).
Check the functions of the dierential
pressure controller - clean valve seat and
capillary tubes if required, - air and rinse
capillary tubes.
Automaticcontrolswronglyset.
Check that the controller has been
correctly set - see separate instructions.
Immersion sensor placed incorrectly.
Place immersion sensor correctly in
accordance with the manufacturer
instructions for the cylinder.
YoumaycontactDanfossRedanA/Sfor
further information.
Calied heating element.
Clean DHW cylinder with acid solution or
replace heating element.
Poor cooling Calied heating element.
Clean DHW cylinder with acid solution or
replace heating element.
Youmaycheckthespecicationsofthe
manufacturer conc. cylinder capacity.
Danfoss District Energy DSA 1 MINI -
1717
Danfoss District Energy VM.HE.B3.02 DEN-SMT/PL
Declaration of conformity
12.0EC-Declarationofconformity
www.danfoss.com; www.termoficare.danfoss.com
EC - Declaration of Conformity
Danfoss District Heating SRL
Danfoss District Energy Division
208 Oltenitei Street, 077160 Popesti-Leordeni, County Ilfov, ROMANIA
Tel: +40 31 2222010; Fax: +40 31 2222299
Declares on our sole responsibility that the products mentioned below including all available
power and control option:
Small Substation – Type Unistat 2013C, Unistat 1016A, DSA 1 Mini
(Article 3§3 according to PED 97/23/EC)
Main components on primary side:
Heat exchangers, shut off valves, control valves and piping
to which declaration relates, are in conformity with the following directives, standards and other
normative documents, provided that they are used according to our instructions:
Machinery Directive 2006/42/EC
EN ISO 14121-1: Safety of machinery - Risk
assessment
LVD – Low Voltage directive - 2006/95/EC
EN 60204-1: Safety of machinery – Part 1- General
requirements
EN 60730-2-9:2010: Automatic electrical controls
for household and similar use
Year of affixed CE-mark: 2010
EMC – directive – 2004/108/EC
EN 61000-6-1:2007: Electromagnetic
compatibility – Generic standard: Immunity for
residential, commercial and light industry
EN 61000-6-3:2007: Electromagnetic
compatibility – Generic standard: Emission for
residential, commercial and light industry
Bucharest 6
th
of September, 2011
Place and date of issue
Constantin Cucu, Quality Manager
ProducedbyDanfossA/S©04/2012
The delivered station may vary from the pictures and diagrams in these instructions.
Danfoss District Energy DSA 1 MINI
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