2. Danfoss
  3. UNISTAT 1016 A/W and WR

Danfoss UNISTAT 1016 A/W and WR Operating instructions

  • Hello! I am an AI chatbot trained to assist you with the Danfoss UNISTAT 1016 A/W and WR Operating instructions. I’ve already reviewed the document and can help you find the information you need or explain it in simple terms. Just ask your questions, and providing more details will help me assist you more effectively!
Installation Guide
UNISTAT 1016 A/W and WR
1
Danfoss District Energy VM.IQ.A1.02 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 ...........................................................................................................................................................................................................................................................................8
7.0 Installation and Start-up ........................................................................................................................................................................................................................................9
7.1 Heat transfer medium treatment ........................................................................................................................................................................................................... 9
8.0 Commissioning .......................................................................................................................................................................................................................................................... 10
9.0 Electrical installation .............................................................................................................................................................................................................................................. 11
9.1 Electrical diagrams ........................................................................................................................................................................................................................................ 12
10.0 Maintenance ............................................................................................................................................................................................................................................................... 15
11.0 Troubleshooting ....................................................................................................................................................................................................................................................... 16
12.0 EC - Declaration of conformity .......................................................................................................................................................................................................................19
Contents
Unistat 1016 A/W Unistat 1016 WR
Danfoss District Energy UNISTAT 1016 –
2
DEN-SMT/PL VM.IQ.A1.02 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 there-
fore have read and understood the operating instructions be-
fore the work begins. The operator is recommended to have all
relevant personnel conrm the understanding of the operat-
ing instructions in writing.
Changes of any kind and additions to or conversions on the
unit are strictly forbidden, and all warranty and product re-
sponsibly 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 pro-
duced. The operator is obliged to determine the compliance
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 addi-
tion 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 respon-
sible for the fault-free operation of the unit, and for the
clear denition of responsibilities with the unit’s installa-
tion, 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 re-
newed immediately. Given setting values or ranges must
be observed.
Danfoss District Energy UNISTAT 1016 –
33
Danfoss District Energy VM.IQ.A1.02 DEN-SMT/PL
Proper use
The unit’s functional and operational safety is only guaranteed
when used properly in accordance with the information in
this instruction.
Proper use also includes correct compliance with installation,
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 peo-
ple 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
Danfoss District Energy UNISTAT 1016 –
4
DEN-SMT/PL VM.IQ.A1.02 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. 40 – 45 kg.
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 com-
ponents, for example.
Possibleharmcausedbyliquidsquirting
underhighpressure.
Wear personal protection equipment
with all work on the unit.
Danfoss District Energy UNISTAT 1016 –
55
Danfoss District Energy VM.IQ.A1.02 DEN-SMT/PL
3.0Storage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.
4.0Disposal
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.
6
Danfoss District Energy UNISTAT 1016 –
6
DEN-SMT/PL VM.IQ.A1.02 Danfoss District Energy
Diagrams
Technicalparameters:
Nominal pressure:
-1016A:PN16
- 1016W: PN25
 T: 35
o
C / 20
o
C
1)
Capacity: 16/30 kW
Weight: 40 - 45 kg
Cover: Steel sheet
Dimensions(mm):
With cover (incl. connections):
H 870 × W 490 × D 337
Connections:
Connectionsizes:
Primary: G ¾”
Secondary: Rp ¾”
Heat meter: G ¾” × 110 mm
Seen from above
RegulationpossibilitiesforECL310:
•Withdifferentapplicationkeys
Options*:
• Heatmeter
• Safetythermostat
• Actuatorwithemergencyofunction
The substation is delivered preassembled,
electrically wired internally and tested for
function and leak tightness.

primary side ⁄ secondary side
A
C
D
B
A
B
C
D
Primary supply
Primary return
Secondary supply
Secondary return
5.0DiagramUnistat1016W/A
A
C
D
B
1 External sensor
2 Thermometer
3 Manometer
4 Sensor
5 Air vent
6 Drainage
7 Strainer
8* Safety thermostat
9 Connection for expansion
vessel
10 Controller
11* Heat meter
12 Ball valve
13 Safety valve
14 Plate heat exchanger
15* Dierential pressure and ow
controller
Primary
return
Primary
supply
Secondary
return
Secondary
supply
*
11
43212 57
12 324
15
64
10
4
1
1358*
14
23 12
122967
Danfoss District Energy UNISTAT 1016 –
77
Danfoss District Energy VM.IQ.A1.02 DEN-SMT/PL
Diagrams
5.1DiagramUnistat1016WR
10*
14*
6 6
5 5
B A C D
1 External sensor
2 Thermometer
3 Manometer
4 Sensor
5 Air vent
6 Drainage
7 Strainer
8 Safety thermostat
9 Controller
10* Heat meter
11 Ball valve
12 Safety valve
13 Heat exchanger
14* Dierential pressure and ow
controller
Primary
return
Primary
supply
Secondary
return
Secondary
supply
11
11
11
11
3 2
3 2
3 2
2
4
7
4
7
44
13
9
12
1
8*
B A C D
Technicalparameters:
Nominal pressure: PN25
 T: 35
o
C / 20
o
C
1)
Capacity: 16/30 kW
Weight: 40 - 45 kg
Cover: Steel sheet
Dimensions(mm):
With cover (incl. connections):
H 870 × W 490 × D 337
Connections:
APrimarysupply
B Primary return
C Secondary return
D Secondary supply
Connectionsizes:
Primary: G ¾”
Secondary: Rp ¾”
Heat meter: G ¾” × 110 mm
Seen from above
RegulationpossibilitiesforECL310:
•Withdifferentapplicationkeys
Options*:
• Heatmeter
• Safetythermostat
• Actuatorwithemergencyofunction
The substation is delivered preassembled
electrically wired internally and tested for
function and leak tightness

primary side ⁄ secondary side
Danfoss District Energy UNISTAT 1016 –
8
DEN-SMT/PL VM.IQ.A1.02 Danfoss District Energy
6.0Mounting
Connections for 1016 A/W Connections for 1016 WR
46612 12 46612 12
100513
100513
125636074 125636074 114
A B D C B A C D
Mounting
Danfoss District Energy UNISTAT 1016 –
99
Danfoss District Energy VM.IQ.A1.02 DEN-SMT/PL
Installation and commisioning
7.0Installationandstart-up
The unit may only be installed and commissioned by skilled
personnel that are experienced in installation, commission and
operating of the Unistat 1016 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 trans-
fer 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 prep-
aration 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 reductions, 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 main-
tenance costs.
Yourinstallationengineerwillbehappytoadviseyou!
Danfoss District Energy UNISTAT 1016 –
10
DEN-SMT/PL VM.IQ.A1.02 Danfoss District Energy
Commissioning
8.0Commissioning
DanfossDistrictEnergyUnistat1016
The Danfos District Energy Unistat 1016 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 en-
sure 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 Unistat 1016 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 UNISTAT 1016 –
1111
Danfoss District Energy VM.IQ.A1.02 DEN-SMT/PL
Electrical instructions
9.0Electricalinstallation
When cabling and connecting the Unistat 1016 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 Unistat 1016 station is already
wired ready in the factory. The electrical connection is per-
formed in acc. with the terminals plan of the installed con-
troller.
OnlyusePT1000versionsensors.
The Danfoss District Energy Unistat 1016 mains connection
shall be performed via the earth leakage circuit breaker in-
stalled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 in-
stalled 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
Unistat 1016)
Lightningprotection:
It is recommended that an transient protection module
with coarse and ne protection is installed, especially in
the supply cable for the Unistat 1016s.
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 UNISTAT 1016 –
12
DEN-SMT/PL VM.IQ.A1.02 Danfoss District Energy
9.1Electricaldiagrams
9.1.1DanfossECL310ControllerwithapplicationkeyA337,A347,A367,A377
Electrical diagrams
Danfoss District Energy UNISTAT 1016 –
1313
Danfoss District Energy VM.IQ.A1.02 DEN-SMT/PL
9.1Electricaldiagrams
9.1.1DanfossECL310ControllerwithapplicationkeyP330
Note 2: for LT substations will be used AMV10/20 acctuators without
"L" connection.
Note 1: thermostat is used only for HT substations. For HT substations
will be used AMV13/23 acctuators with "L" connection.
Electrical diagrams
Danfoss District Energy UNISTAT 1016 –
14
DEN-SMT/PL VM.IQ.A1.02 Danfoss District Energy
Wiring diagram
9.1.2DanfossControllerOPR0020Wiringdiagram
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
Danfoss District Energy UNISTAT 1016 –
1515
Danfoss District Energy VM.IQ.A1.02 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 per-
form 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.
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 importance
for the total heat economy. It is therefore very important to ob-
serve the supply and return temperatures. Normal temperature
dierence is 30 – 35 °C.
Pleasenote,that the lowest district heating return temperature
is directly dependent on the return temperature from the heat-
ing 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 authorized personnel immediately.
Please note that the connections may be supplied with EPDM
rubber gaskets – in general connection sizes ½” and ¾”.
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 UNISTAT 1016 –
16
DEN-SMT/PL VM.IQ.A1.02 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 UNISTAT 1016 –
1717
Danfoss District Energy VM.IQ.A1.02 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 UNISTAT 1016 –
18
DEN-SMT/PL VM.IQ.A1.02 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 UNISTAT 1016 –
1919
Danfoss District Energy VM.IQ.A1.02 DEN-SMT/PL
Declaration of conformity
12.0EC–Declarationofconformity
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/W/WR, 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 23
rd
of April, 2013
Place and date of issue
Constantin Cucu, Quality Manager
ProducedbyDanfossA/S©05/2013
The delivered station may vary from the pictures and diagrams in these instructions.
Danfoss District Energy UNISTAT 1016
/