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Cetetherm Mini Plus CM737

Installation, service and operating instruction

29

13.4 Heating circuit pump Grundfos UPML 25-95 180, settings and capacity

The heating pump is internally controlled via digital pulse-width modulation.
The user interface allows to select between six control curves in two control modes:

•

three proportional pressure curves (PP)

•

three constant pressure/power curves (CP).

The pump is factory preset to Proportional pressure curve, PP2.

Flashing fast

PP1

Flashing fast

PP2

Flashing fast

PP3

Flashing slow

CP1

Flashing slow

CP2

Flashing slow

CP3

Picture 15, LED indication of the curve setting

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Содержание Mini Plus CM737

Страница 1: ...01 Installation service and operating instruction Cetetherm Mini Plus CM737 DHWC och serviceinstruktion Mini Mini XL RVS46 District heating substation for single family houses and multi family buildin...

Страница 2: ...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...

Страница 3: ...er installation 13 7 5 Setting the day 14 7 6 Setting the time 14 8 Operating the room thermostat CM737 15 8 1 Choosing the operating mode 15 8 2 Temperature Enquiry with the Info button 7 15 8 3 Holi...

Страница 4: ...diator system 36 16 Service actions for the installer 37 16 1 Check the function of the valve for hot water 37 16 2 Check the heating actuator and valve function 38 16 3 Check the circulation pump Gru...

Страница 5: ...t the substation can be started without delay The Mini Plus is designed for hanging on the wall Mini Plus is supplied fully wired The wiring conforms to the applicable rules for CE marking and has und...

Страница 6: ...make sure that the secondary 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 c...

Страница 7: ...gh otherwise the risk of lime deposits in the heat exchanger may increase 2 2 Safety equipment inspection Daily inspection to check for leaks from pipes or components Weekly inspection to make sure th...

Страница 8: ...circuit 23 Pressure gauge for heating circuit 7 Outdoor temperature sensor not in picture 24 Circulation pump heating 8 Operator control panel with room thermostat 25 Safety thermostat option 9 Contr...

Страница 9: ...hot water systems 4 3 Mounting Mount the substation on the wall using four screws or bolts suitable for the material of the wall and for the weight of the unit The unit may be mounted at any height o...

Страница 10: ...Heating system service instructions After final bleeding the pressure should not be less than 1 0 bar in winter and not less than 0 6 bar in summer Set the pump capacity of the heating circulation pu...

Страница 11: ...Cetetherm Mini Plus CM737 Installation service and operating instruction 9 5 Measure sketch Mini Plus Picture 3...

Страница 12: ...to 35 C Built in Memory holds the user program indefinitely Holiday button saves energy by letting you reduce the temperature for 1 to 99 days 7 days heating program to match your lifestyle and maximi...

Страница 13: ...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 op...

Страница 14: ...Cetetherm Mini Plus CM737 Installation service and operating instruction 12 Picture 6...

Страница 15: ...schedule 10s actuator clockwise if not closed at start 10s actuator counter clockwise 10s actuator clockwise 10s pump runs 150s actuator closes After approximately another 4 minutes the room thermosta...

Страница 16: ...6 Setting the time 1 Press either of the or buttons once to enter timer setting mode The LCD screen flashes the time digits When the unit is powered for the first time the display shows 12 00 2 Use t...

Страница 17: ...on 7 Each value will be displayed for 3 second before returning to show the initial screen NOTE The initial screen shows different temperatures depending on if the outdoor temperature sensor is connec...

Страница 18: ...exit the function at any time press the button a second time 8 4 OTC heating curve The CM737 controls the indoor temperature as a function of the measured outside air temperature The heating curve is...

Страница 19: ...each day of the week so the complete 7 day heating program can be reviewed or edited 8 6 3 Temperature Override During AUTO mode the programmed temperature can be adjusted manually The target tempera...

Страница 20: ...firm the setting again by pressing the green button e The next time and temperature period will now be active Adjust this by repeating steps b d above until all four periods are set or press the AUTO...

Страница 21: ...lues Category 4 parameters Heating actuator settings Category 5 Fault History 9 1 Entering the installer set up mode 1 Press the OFF button 2 Press and hold the button and the two PROGRAM and buttons...

Страница 22: ...ment in 0 1 C steps Room control OTC 1 14 rC 0 Room temperature control thermostat 1 or 2 1 OTC control without room temperature compensation 2 OTC control with room temperature compensation OTC heat...

Страница 23: ...f day DHW storage during HOLIDAY 9 HH 0 DHW storage disabled during HOLIDAY 1 DHW storage enabled during HOLIDAY Low capacity control 10 LD 1 Not applicable 0 Not applicable 9 5 Category 4 parameters...

Страница 24: ...No power feed after the installation of the control panel Check that the power supply cable of the connection box is connected The control panel is not connected to the correct terminals of the conne...

Страница 25: ...ult code 2 Outside sensor out of operating range This fault code can only occur after the measured outside temperature has been in range 40 C to 60 C Cause Measured outside temperature is below 40 C o...

Страница 26: ...Cetetherm Mini Plus CM737 Installation service and operating instruction 24 11 Electrical circuit diagram Picture 11...

Страница 27: ...Cetetherm Mini Plus CM737 Installation service and operating instruction 25 12 Schematic diagram main components Picture 12...

Страница 28: ...one for the hot water circulation DHWC pump and one for the heating circuit The DHWC pump is a traditional three speed circulation pump The DHWC pump has a switch where the speed capacity can be set...

Страница 29: ...ng heat demand and increased at rising heat demand The duty point of the pump will move up or down on the selected proportional pressure curve depending on the heating demand PP2 PP3 CP1 Constant pres...

Страница 30: ...setting selection In this case unlock the key lock by pressing the button for more 10 seconds To select between the settings instantly press the button until you find the setting you want If you pass...

Страница 31: ...pulse width modulation The user interface allows to select between six control curves in two control modes three proportional pressure curves PP three constant pressure power curves CP The pump is fac...

Страница 32: ...ting mode LED starts flashing 2 With each push the setting changes LED 1 2 3 are permanently on and then the control curve and mode is changed 3 Flashing mode Fast Proportional pressure Slow Constant...

Страница 33: ...control box with a screwdriver Pump is defective Replace the pump Noise in the system Air in the system Vent the system Differential pressure is too high Reduce the pump performance at the pump or ex...

Страница 34: ...ncing valve Check that the balancing valve is open enough 15 1 2 Tap water temperature too high Reason Action Handle on control valve incorrectly positioned Adjust the handle on the control valve The...

Страница 35: ...ressure should not be below 1 0 Bar in winter time or below 0 6 Bar in summer The circuit should only be topped up with fresh water when necessary The water used for topping up contains oxygen which c...

Страница 36: ...eating parameters in operator control panel Summer reduction parameter 2 category 2 If measured outdoor temperature is higher than target temperature the pump should not be operating Economy function...

Страница 37: ...for leaks Leaks from the substation or the heating system cause pressure drop Contact your service technician if finding any leaks The heating system safety valve is leaking or does not work Check th...

Страница 38: ...y is set too high Reduce the pump capacity Reduce the level by choosing a lower output setting on the pump Air in the pump Vent the pump The pump is self venting Air in the pump may cause noise This n...

Страница 39: ...y and then the return line to avoid pollutions in the system Open the valves slowly to avoid pressure surges 1 Disconnect the power feed to the substation 2 Close the shut off valves 3 Unscrew the tap...

Страница 40: ...he valve s spindle with a tool and check the valve s travel and spring back NOTE The valve may be very hot Picture 21 16 3 Check the circulation pump Grundfos UPS If the pump fails to start after stop...

Страница 41: ...circulation pump 3 Open the heating valve manually by turning the actuator knob counter clockwise Open the control valve sufficiently to satisfy the heating needs 4 Connect the power feed to the subs...

Страница 42: ...valves Start with DH supply and then the return line to avoid pollutions in the system Open the valves slowly to avoid pressure surges 1 Disconnect the power feed to the substation 2 Close the shut o...

Страница 43: ...tting of the balancing valve then close it Release the pressure using the DHWC safety valve After finishing repair fill up the hot water circuit and vent Open the shutoff valves start with DH Supply a...

Страница 44: ...ump 2 Close the shut off valves 3 Choose alternative a or b c When changing the complete pump release the brass nuts with a wrench and replace the pump Connect the pump cable d Only changing the motor...

Страница 45: ...he control panel after 5 min Picture 28 17 7 Change the heating actuator Maintenance and repairs must be carried out by an authorized service technician 1 Disconnect the power feed to the substation 2...

Страница 46: ...by turning the knob clockwise to the closing position Fasten the actuator use only hand power 7 Open the shutoff valves and connect the power feed to the substation Picture 31 17 9 Change the hot wat...

Страница 47: ...he hot water circuit and vent Open the shutoff valves start with DH Supply and then DH return to avoid pollutions in the system Open the valves slowly to avoid pressure surges 8 Disconnect the power f...

Страница 48: ...valves cold and hot water 7 Open and adjust the balancing valve 8 Vent the circuit by opening a hot water tap 9 Connect the power feed to the substation Open the shutoff valves DH Supply and then DH r...

Страница 49: ...e for heating supply 6 Set the correct maximum temperature value for the thermostat 7 Attach all electrical wires with the necessary number of straps It is important not to attach electrical wires on...

Страница 50: ...Cetetherm Mini Plus CM737 Installation service and operating instruction 48 19 Operating data and performance 19 1 Operating data Mini Plus CB30 60H 19 2 Operating data Mini Plus CB18 54H...

Страница 51: ......

Страница 52: ...Cetetherm AB Fridhemsv gen 15 372 38 Ronneby Sweden www cetetherm com...

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