Alfalaval Mini ECO Manual

DOC-1392, 2018-02-01
Installation, service and operating instruction Alfa Laval Mini ECO
Heating & domestic hot water substation for apartments and single family houses

This manual is published by Alfa Laval.
Alfa Laval can without further notice make changes and improvements to the content in this manual if it is necessary due to printing
mistakes, wrong information or changes in the hardware or software.
All these types of changes will be included in future release of the manual.
For additional on-line information, latest version of this manual and an installation
movie:
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Alfa Laval Mini ECO
Installation, service and operating instruction
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Contents
1General information..............................................................................................................6
1.1 Comfort......................................................................................................................................................6
1.2 Installation .................................................................................................................................................6
1.3 Long-term security.....................................................................................................................................6
1.4 CE-marking................................................................................................................................................6
1.5 Information about the document................................................................................................................6
1.6 General warnings ......................................................................................................................................7
2Operating instructions..........................................................................................................8
2.1 General operation......................................................................................................................................8
2.2 Safety equipment/inspection.....................................................................................................................8
3Product overview..................................................................................................................9
3.1 Product overview Mini ECO F1.................................................................................................................9
3.2 Product overview Mini ECO F2.............................................................................................................. 10
3.3 Product overview Mini ECO F3.............................................................................................................. 11
3.4 Product overview Mini ECO F4.............................................................................................................. 12
3.5 Product overview Mini ECO F5.............................................................................................................. 13
4Installation...........................................................................................................................14
4.1 Unpacking............................................................................................................................................... 14
4.2 Preparation............................................................................................................................................. 14
4.3 Mounting the substation ......................................................................................................................... 14
4.4 Filling up the system............................................................................................................................... 14
4.4.1 Filling up the tap water circuit............................................................................................................ 15
4.5 Filling up and bleeding the heating circuit.............................................................................................. 15
4.5.1 Connect to heating network .............................................................................................................. 15
4.6 Connecting the electrical equipment...................................................................................................... 15
4.7 Mounting options.................................................................................................................................... 16
4.8 Commissioning advice Mini ECO........................................................................................................... 16
4.9 General adjustments and settings.......................................................................................................... 16
4.10 Dismantlement........................................................................................................................................ 16
4.11 Installing the room thermostat Round .................................................................................................... 17
4.12 Installing the control panel CM737......................................................................................................... 18
4.13 Installing the outdoor temperature sensor.............................................................................................. 20
4.14 Starting up sequence for Mini ECO with component check................................................................... 20
5CM737- settings to be done after start-up.........................................................................21
5.1 Configure the control panel after installation.......................................................................................... 21
5.2 Setting the day........................................................................................................................................ 21
5.3 Setting the time....................................................................................................................................... 21
6Room thermostat Round....................................................................................................22
6.1 General................................................................................................................................................... 22
6.2 Control modes........................................................................................................................................ 23
6.3 Changing control mode, OTC heating curve and max supply temperature........................................... 23
6.4 OTC control mode, default setting ......................................................................................................... 24
6.5 Viewing the room temperature............................................................................................................... 24
6.6 Viewing the set room temperature ......................................................................................................... 24
6.7 Changing temperature setting................................................................................................................ 24
6.8 Setback................................................................................................................................................... 24
6.9 Summer heating..................................................................................................................................... 24
6.10 Display symbols...................................................................................................................................... 25
6.11 Fault messages on the room thermostat................................................................................................ 25
6.12 Fault codes on room thermostat Round................................................................................................. 26
6.13 Factory settings, room thermostat.......................................................................................................... 26
7Control panel with room thermostat CM737.....................................................................27
7.1 General................................................................................................................................................... 27
7.2 Choosing the operating mode................................................................................................................ 28
7.3 Temperature Enquiry with the Info-button (7) ........................................................................................ 28
7.4 Holiday function...................................................................................................................................... 29

Alfa Laval Mini ECO
Installation, service and operating instruction
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7.5 OTC heating curve ................................................................................................................................. 29
7.6 Parallel adjustment of heating curve...................................................................................................... 29
7.7 Operating mode Auto ............................................................................................................................. 30
7.7.1 The Built-in Heating Program............................................................................................................ 30
7.7.2 Reviewing the Heating Program ....................................................................................................... 30
7.7.3 Temperature Override....................................................................................................................... 30
7.7.4 Disabling/enabling time periods ........................................................................................................ 30
7.7.5 Modifying the heating program.......................................................................................................... 31
8Activation of installer parameters CM737.........................................................................32
8.1 Entering the installer set-up mode ......................................................................................................... 32
8.2 Category 1 parameters: Control panel settings...................................................................................... 33
8.3 Category 2 parameters: ECO-functions................................................................................................. 33
8.4 Category 3 parameters: Setting and displaying sensor values.............................................................. 34
8.5 Category 4 parameters: Heating actuator settings................................................................................. 34
8.6 Category 5: Fault History........................................................................................................................ 34
9Troubleshooting the control panel CM737........................................................................35
9.1 Fault codes on the control panel CM737 ............................................................................................... 36
10 Pump settings and pump performance.............................................................................37
10.1 Performance view................................................................................................................................... 37
10.1.1 Operation status................................................................................................................................ 37
10.1.2 Alarm status ...................................................................................................................................... 37
10.2 Setting view............................................................................................................................................ 38
10.3 Toggling the settings of UPM3............................................................................................................... 38
10.4 Key lock function .................................................................................................................................... 38
10.5 Pump curve proportional pressure mode 2, PP2................................................................................... 39
10.6 Fault finding pump.................................................................................................................................. 40
11 Electrical connections........................................................................................................41
12 Schematic diagram, main components.............................................................................42
12.1 Mini ECO F1........................................................................................................................................... 42
12.2 Mini ECO F2........................................................................................................................................... 42
12.3 Mini ECO F3........................................................................................................................................... 43
12.4 Mini ECO F4........................................................................................................................................... 43
12.5 Mini ECO F5........................................................................................................................................... 44
13 Service instructions............................................................................................................45
13.1 Tap water service instructions................................................................................................................ 45
13.1.1 Tap water temperature too low ......................................................................................................... 45
13.1.2 Tap water temperature too high........................................................................................................ 46
13.1.3 Hot water temperature unstable or too low....................................................................................... 46
13.2 Heating system service instructions....................................................................................................... 46
13.2.1 Heating system temperature too high or too low .............................................................................. 46
13.2.2 No heating......................................................................................................................................... 48
13.2.3 Heating temperature unstable........................................................................................................... 49
13.2.4 Disturbing noise from the circulation pump or the radiator system................................................... 50
13.2.5 Heating system often needs topping up............................................................................................ 50
14 Service actions for the installer.........................................................................................51
14.1 Check the function of the valve for hot water......................................................................................... 51
14.2 Check the function of the heating actuator and valve............................................................................ 52
14.3 Check the volume take-up and pressure equalizing of the expansion vessel ....................................... 52
15 Maintenance and repairs....................................................................................................53
15.1 Cleaning the heating media filter............................................................................................................ 53
15.2 Cleaning the heating circuit filter............................................................................................................ 53
15.3 Change pump components or the complete pump................................................................................ 54
15.4 Change the hot water actuator and heat exchanger.............................................................................. 55
15.5 Change the hot water valve.................................................................................................................... 55
15.6 Change the heating actuator.................................................................................................................. 56
15.7 Change the heating valve....................................................................................................................... 56
15.8 Change the heating circuit supply temperature sensor.......................................................................... 57

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Installation, service and operating instruction
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15.9 Change the outdoor temperature sensor ............................................................................................... 57
15.10 Change the DHWC check valve............................................................................................................. 58
15.11 Change the expansion vessel................................................................................................................ 58
15.12 Change the differential pressure control valve....................................................................................... 59
16 Operating data and performance.......................................................................................60
16.1 Technical Data........................................................................................................................................ 61
16.2 Measure sketch...................................................................................................................................... 61
17 Options................................................................................................................................62
17.1 Differential pressure control valve, DPC ................................................................................................ 62
17.1.1 Setting the DPC valve....................................................................................................................... 62
17.1.2 Flow rate graph of the DPC............................................................................................................... 62
17.2 Safety thermostat ................................................................................................................................... 63
17.2.1 Parameters and recommended settings for under floor heating....................................................... 63
17.3 Service bypass....................................................................................................................................... 64

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1 General information
Alfa Laval Mini ECO is a complete, ready-to-install heating network substation for hot water and heating. It is
designed for buildings with a connection to a heating network.
Alfa Laval has years of experience in heating network technology and has developed Alfa Laval Mini ECO with
well-planned pipe work and with all components easily accessible for inspection and future servicing.
Comfort1.1
Alfa Laval Mini ECO has fully-automatic temperature control for heating and hot water. The hot water is
controlled and maintained at the desired temperature.
The heating circuit is controlled in relation to outdoor temperature and/or desired room temperature by means
of a controller and temperature sensor.
Installation1.2
Read this manual before installing the substation.
Compact dimensions, light weight, well arranged plumbing and factory-complete internal wiring – all make
installation very simple. A pre-programmed control unit and a power cable already fitted with a plug make
things even simpler to allow immediate start-up.
Mini ECO is designed for hanging on wall and is mounted on an insulated frame and includes an insulated
cover. Better insulation means less energy usage and better energy efficiency.
Long-term security1.3
The heat exchanger plates and all piping are manufactured in acid-resistant stainless steel. All components are
closely matched and carefully tested for function in accordance with Alfa Laval’s quality assurance system
ISO9001:2008.
For future servicing requirements, all components are accessible and individually replaceable.
CE-marking1.4
Alfa Laval Mini ECO follows the rules and legislation specified in the Declaration of Conformity.
To maintain the validity of the CE marking, only identical replacement parts must be used.
Information about the document1.5
All pictures in this document are general images.
Mini City is available in different models and levels of equipment.

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Installation, service and operating instruction
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General warnings1.6
The installation work must be carried out by an authorized installation contractor. Before the
system is taken into operation, it must be pressure tested in accordance with relevant
regulations.
The temperature and the pressure of the primary heating water are very high. Only qualified
technicians are allowed to work with the substation. Incorrect operation may cause serious
personal injury and result in damage to the building.
If the hot water temperature is set too high, people may be scalded. If the hot water temperature
is set too low, unwanted bacteriological growth may occur in the hot water system. This can
result in serious personal injury.
Parts of the substation may get very hot and should not be touched.
When starting up the substation: To avoid the risk of scalding, make sure that no-one draws any
hot water until the hot water temperature has been adjusted.
Start heating circulation by first opening the valves in the heating media supply and then return
lines, in order to avoid pollutions in the system. Open the valves slowly to avoid pressure surges.
Then open heat return and then supply.
Before the substation is connected to the electrical supply, make sure that the heating system is
topped up with water. Starting up the system without water will damage the circulation pump.
The substation comes prepared with an electrical plug to be connected to the main supply. If
necessary, the plug-and-socket connection can be replaced with a permanent installation with an
all-pole isolate switch. This must be carried out by a qualified electrician.

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Installation, service and operating instruction
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2 Operating instructions
General operation2.1
The temperature and pressure of the incoming heating network water are very high. The heat from the heating
network water is transferred to the heating and hot water systems of the building in the heat exchangers. The
heat is transferred through thin plates of acid-resistant stainless steel which keep the heating network water
separate from the systems in the building.
Mini ECO has automatic temperature control for hot water. This measures the temperature of the hot water in
the heat exchanger and automatically controls the primary flow.
The hot water temperature is controlled by a temperature control system which is set to about 50 ºC.
If the temperature is set too high, there is a risk of scalding. Setting the hot water temperature too low may
result in unwanted bacteriological growth in the hot water system.
The heating circuit is controlled in relation to outdoor temperature and/or desired room temperature by means
of a room thermostat or outdoor temperature sensor (option) or via a universal input.
When no heating flow is required, the heating circulation pump stops automatically, but is run occasionally to
prevent seizing up due to standing still for a long time.
After adjustment, the Mini ECO operates completely automatically. However, in hard water areas it is advisable
to be attentive and to remedy any faults in good time if the temperature of the hot water is too high; otherwise
the risk of lime deposits in the heat exchanger may increase.
The energy supplier registers the use of energy. Measurement is done by recording the flow of heating network
medium through the system, and by measuring the temperature difference between the medium’s supply and
return flow.
Safety equipment/inspection2.2
•Daily inspection to check for leaks from pipes or components.
•Weekly inspection to make sure that the operation of the heating and hot water control systems is
stable and that the temperature does not fluctuate. Temperature hunting causes unnecessary wear of
valves, thermostats and heat exchangers.
•Every three months check the safety valves and the pressure in the heating system.
To check the operation of a safety valve, turn its wheel/knob until water escapes from the waste pipe of the
valve, then close the wheel/knob quickly. Occasionally a safety valve may open automatically to release excess
pressure. After a safety valve has been open it is important that it closes properly and does not drip.

Alfa Laval Mini ECO
Installation, service and operating instruction
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3 Product overview
Product overview Mini ECO F13.1
Picture 1
3.
Heat exchanger for heating
24.
Connection box for electric power and
sensors, heating circuit
4.
Control valve, heating circuit
25.
Room thermostat/control panel
5.
Actuator, heating circuit
26.
Outdoor temperature sensor (option)
6. Temperature sensor connection,
heating media supply
27. Filter heating circuit
7.
Filter for heating media
28.
Pressure gauge for heating circuit
8.
Adapter for energy meter
29.
Filling valve
14.
Heating network media, supply
(primary inlet)
30.
Safety valve for heating circuit
15.
Heating network media, return
(primary return)
31.
Expansion vessel heating circuit
20.
Heating circuit, return
32.
Circulation pump, heating circuit
21.
Heating circuit, supply
33.
Supply temperature sensor, heating circuit
22.
Air vent valve
34.
Valve kit (option)

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Installation, service and operating instruction
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Product overview Mini ECO F23.2
Picture 2
1.
Heat exchanger and temperature controller
for hot water
17.
Cold water outlet (cw)
2.
Control valve for hot water
18.
Hot water (hw)
3.
Heat exchanger for heating
20.
Heating circuit, return
4.
Control valve, heating circuit
21.
Heating circuit, supply
5.
Actuator, heating circuit
22.
Air vent valve
6.
Temperature sensor connection, heating
media supply
24.
Connection box for electric power and
sensors, heating circuit
7.
Filter for heating media
25.
Room thermostat/control panel
8. Adapter for energy meter 26. Outdoor temperature sensor (option)
9.
Check valve for cold water
27.
Filter heating circuit
10.
Adapter for Cold water flow meter
28.
Pressure gauge for heating circuit
11. Safety valve for domestic hot water 29. Filling valve
12.
Adapter for Hot water flow meter
30.
Safety valve for heating circuit
13.
Safety temperature limiter hot water
31.
Expansion vessel heating circuit
14.
Heating network media, supply
(primary inlet)
32.
Circulation pump, heating circuit
15.
Heating network media, return
(primary return)
33.
Supply temperature sensor, heating circuit
16. Cold water (cw) 34. Valve kit

Alfa Laval Mini ECO
Installation, service and operating instruction
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Product overview Mini ECO F33.3
Picture 3
1.
Heat exchanger and temperature controller
for hot water
17.
Cold water outlet (cw)
2.
Control valve for hot water
18.
Hot water (hw)
3.
Heat exchanger for heating
20.
Heating circuit, return
4.
Control valve, heating circuit
21.
Heating circuit, supply
5.
Actuator, heating circuit
22.
Air vent valve
6.
Temperature sensor connection, heating
media supply
24.
Connection box for electric power and
sensors, heating circuit
7.
Filter for heating media
25.
Room thermostat/control panel
8. Adapter for energy meter 26. Outdoor temperature sensor (option)
9.
Check valve for cold water
27.
Filter heating circuit
10.
Adapter for Cold water flow meter
28.
Pressure gauge for heating circuit
11. Safety valve for domestic hot water 29. Filling valve
12.
Adapter for Hot water flow meter
30.
Safety valve for heating circuit
14.
Heating network media, supply
(primary inlet)
31.
Expansion vessel heating circuit
15.
Heating network media, return
(primary return)
32.
Circulation pump, heating circuit
16.
Cold water (cw)
33.
Supply temperature sensor, heating circuit
34. Valve kit

Alfa Laval Mini ECO
Installation, service and operating instruction
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Product overview Mini ECO F43.4
Picture 4
1.
Heat exchanger and temperature controller
for hot water
21.
Heating circuit, supply
2.
Control valve for hot water
22.
Air vent valve
3.
Heat exchanger for heating
24.
Connection box for electric power and
sensors, heating circuit
4.
Control valve, heating circuit
25.
Room thermostat/control panel
5. Actuator, heating circuit 26. Outdoor temperature sensor (option)
6.
Temperature sensor connection, heating
media supply
27.
Filter heating circuit
7.
Filter for heating media
28.
Pressure gauge for heating circuit
8.
Adapter for energy meter
29.
Filling valve
12.
Adapter for Hot water flow meter
30.
Safety valve for heating circuit
14. Heating network media, supply
(primary inlet)
31. Expansion vessel heating circuit
15.
Heating network media, return
(primary return)
32.
Circulation pump, heating circuit
16.
Cold water (cw)
33.
Supply temperature sensor, heating circuit
18.
Hot water (hw)
34.
Valve kit
20.
Heating circuit, return

Alfa Laval Mini ECO
Installation, service and operating instruction
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Product overview Mini ECO F53.5
Picture 5
1.
Heat exchanger and temperature controller
for hot water
18.
Hot water (hw)
2.
Control valve for hot water
19.
Differential pressure controller
3. Heat exchanger for heating 20. Heating circuit, return
4.
Control valve, heating circuit
21.
Heating circuit, supply
5.
Actuator, heating circuit
22.
Air vent valve
6.
Temperature sensor connection, heating
media supply
24.
Connection box for electric power and
sensors, heating circuit
7.
Filter for heating media
25.
Room thermostat/control panel
8. Adapter for energy meter 26. Outdoor temperature sensor (option)
9.
Check valve for cold water
27.
Filter heating circuit
10.
Adapter for Cold water flow meter
28.
Pressure gauge for heating circuit
11. Safety valve for domestic hot water 29. Filling valve
12.
Adapter for Hot water flow meter
30.
Safety valve for heating circuit
14.
Heating network media, supply
(primary inlet)
31.
Expansion vessel heating circuit
15.
Heating network media, return
(primary return)
32.
Circulation pump, heating circuit
16.
Cold water (cw)
33.
Supply temperature sensor, heating circuit
17. Cold water outlet (cw) 34. Valve kit

Alfa Laval Mini ECO
Installation, service and operating instruction
14
4 Installation
Unpacking4.1
•Remove the transport packaging and check that the product has not been damaged in transit and that
the consignment agrees with the specifications.
•When lifting the unit take care not to apply stress to pipes and heat exchanger as this may weaken
them. Avoid lifting the unit by holding the heat exchanger.
Note: Risk of injury lifting heavy objects.
Preparation4.2
•Mini ECO must be placed on a wall, in upright position. Mount the unit using screws or bolts suitable for
the material of the wall and for the weight of the unit.
•Choose a suitable installation area in accordance with official regulations.
The substation may generate sounds during operation caused by pumps, regulators systems, flows etc.
This should be taken in consideration during installation of the unit so that possible operational sounds
affect the surroundings as little as possible.
•Alfa Laval recommends that the substation is mounted on well-insulated walls, such as outer walls or
on concrete walls.
•Check the applicable regulations of the primary heating supplier. The available differential pressure
should be at least 50 kPa and at most 600 kPa.
•Where the differential pressure is higher, a differential pressure controller should be added to the
installation.
Mounting the substation4.3
•Before mounting the substation tighten the pipe connection Heating network media, supply and Heating
network media, return with 45 Nm.
•Mount the substation on the wall with four screws.
Alfa Laval recommends having 900 mm from floor to the substation.
•Place gaskets on the valves and use hand power and fasten the nuts to the pipes on the substation.
•Tighten with 45 Nm.
•Close all valves.
•Connect the pipe work to the valves.
The temperature and the pressure of the primary heating water are very high.
Only qualified technicians can work with the substation. Incorrect operation may cause serious
personal injury and result in damage to the building.
•Energy meters see 3 Product overview, must be installed at a prepared location, replacing a gauge
block, or following the instructions of the energy supplier.
•Mount the provided draining pipe to the safety valve on the cold water circuit.
•Connect a hose or a pipe from the safety valves to the floor gully.
Filling up the system4.4
•Fill up the system with water by opening the valves on the first fix-jig.
The valves must be opened in the correct order in order to avoid pollutions in the system.
Open the valves slowly to avoid pressure surges.

Alfa Laval Mini ECO
Installation, service and operating instruction
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Filling up the tap water circuit4.4.1
•Open the valves Cold water, Cold water outlet and Hot water.
•Open all water taps in the building to get rid of trapped air. Let them be open until all air is gone.
Filling up and bleeding the heating circuit4.5
•Attach the long, provided filing hose between the filling valves, to fill up the heating circuit.
•Open the valves Heating circuit return and Heating circuit supply.
•Open the filling valves.
•Fill up the system until the manometer shows 1,6 Bar.
•Close the filling valves.
•Bleed the heating system via the air vent valves and at the heating systems draining places e.g.
radiator valves.
•If the pressure is low after bleeding the system, open the filling valves and fill up to 1,6 Bar again.
•The first time the heating system is filled up, this procedure might have to be repeated several times.
•When the pressure is correct and the heating system is drained from air, remove the filling hose.
Connect to heating network4.5.1
•Open the valves Heating network media, supply and Heating network media, return.
Start with supply then return.
•When all connections are done and the all circuits are pressurized, look for leaks.
•If connections need retightening after the installation has been taken into service, the system must be
depressurised. If the system is not depressurised, gaskets will be damaged.
Connecting the electrical equipment4.6
•Remove the lid that covers the connection box and loosen the connection box from the insulation.
Picture 6
1
Universal input for connecting
e.g.. outdoor temperature
sensor, flow switch, relay
contact, strap
2 Room thermostat
3
Supply temperature sensor
4
Actuator, heating
5
Power cable adapter
•Install the room thermostat; see 4.11 Installing the room thermostat or 4.12 Using the control panel
CM737 as a room thermostat.
•Connect the non-polarity contact from the room thermostat to the connection box.
Carefully press the cable into the trail in the insulation.
•Mount the outdoor temperature sensor on the north side of the building, 2 metres above the ground, or
higher. See 4.13 Installing the outdoor temperature sensor.
•Connect the non-polarity contact from the outdoor temperature sensor to the connection box.
Carefully press the cable into the trail in the insulation.
•Connect the correct power cable to connection box and press the box and cable into the trail in the
insulation.
•Place the lid over the connection box.

Alfa Laval Mini ECO
Installation, service and operating instruction
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•Put the electrical cable into a wall outlet.
See 4.14 Starting up sequence for Mini ECO with component check.
•Mount the insulation cover. Always use the handles on the side when handling the cover
Mounting options4.7
•If the substation is connected to a system sensitive to high temperature or to a low temperature system,
for example floor heating, a safety thermostat must be mounted and activated before starting up.
For more information 17.2 Safety thermostat.
Commissioning advice Mini ECO4.8
•Adjust the hot water temperature by having a hot water tap open at normal flow rate.
Measure the temperature at the draw-off point with a thermometer. It takes about 20 seconds to get a
stable tap water temperature.
The temperature should be minimum 50°C.
Alfa Laval recommends that the primary inlet temperature is at least 10º higher than the tap water
temperature. NOTE: Make sure that no cold water is mixed with the hot water while making this
adjustment.
Seal the hot water actuator after setting.
•Set the control mode on the control panel.
Control panel Round has been pre-set at the factory to use control mode; Outside Temperature
Control (OTC control).
To change control mode see 6Room thermostat Round.
Control panel CM737 see 5 CM737- settings to be done after start-up.
The control panel has been pre-set at the factory to use Outdoor compensation
(parameter 14:rC set to 1 ).
To change see 5.1 Configure the control panel after installation.
General adjustments and settings4.9
The property owner must be instructed in the operation, setting and care of the unit.
It is particularly important to provide information about the safety systems and about hazards that may arise in
relation to the high pressure and temperature of the primary heating water.
Dismantlement4.10
When the time comes for the substation to be dismantled and scrapped it must be disposed of in the correct
manner in accordance with local or national regulations.

Alfa Laval Mini ECO
Installation, service and operating instruction
17
Installing the room thermostat Round4.11
1 Removing power supply
2 Placement
3 Removing the dial
4 Removing the thermostat
5a Mounting direct on the wall
5b Mounting in wall socket
6 Connecting the cable
7 Mounting the thermostat
8 Mounting the dial
Picture 7

Alfa Laval Mini ECO
Installation, service and operating instruction
18
Installing the control panel CM7374.12
The control panel CM737 can be used as a room thermostat.
Before installation make sure that the electrical power supply is disconnected.
Install the room thermostat at an appropriate location that is representative to the indoor temperature.
Picture 8
•A suitable installation is about 1.5 meters above floor and on an inner wall.
•The room thermostat must not be combined with other thermostats in the same control zone.
Use a suitable 2-conductor cable between the connection box and the operator control panel. With a conductor
area of 0.6 mm2, the maximum cable length is 50 metres. Maximum 5Ω/ conductor. Install the cable ends in
the terminal, marked A and B, located in the operator control panel. Connect the plug to the connection box
again. The unit can now be connected to the electrical power.
After starting up, choose configuration and operating mode, see 5.1 Configure the control panel after
installation.

Alfa Laval Mini ECO
Installation, service and operating instruction
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Picture 9

Alfa Laval Mini ECO
Installation, service and operating instruction
20
Installing the outdoor temperature sensor4.13
Connect the outdoor temperature sensor to the electric box.
With a conductor area of 0.6 mm2the maximum cable length is 50 metres, maximum 5 Ω/conductor.
If the outdoor temperature sensor is connected at a later time, for example in a construction period, the room
thermostat must be restarted.
Control panel Round: See 6.3 Changing control mode, OTC heating curve and max supply temperature.
Control panel CM737: Set parameter 14 according to requested compensation; see 5.1 Configure the control
panel after installation.
Starting up sequence for Mini ECO with component check4.14
The substation must be filled with water before starting the room thermostat, if not the pump can
be damage.
•Put the electrical cable from the control panel into a wall outlet.
•We recommend using an earth fault breaker.
•A check of the actuator and pump function starts.
During start-up sequence, the components manoeuvres by the following schedule:
o10s actuator closes
o10s actuator opens
o10s actuator closes
o10s pump runs
o150s actuator closes.
•The next five minutes, the pump starts running and control begins to regulate to 37°C.
Note: Under certain operating conditions, 37°C is not reached within 5 min. The Actuator knob should
however have moved counter clockwise.
When start-up sequence is completed the room thermostat returns to last set control mode.
Note: If there is no heat demand the pump stops after the start-up sequence.