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26

Special functions

6.3. - Speed control

6.3.1. -  Modes

The following speed variants are available here:

Off:

 There is no speed control. The connected pump is only switched on or off with full 

speed.

Mode 1:

 After the purging time the controller switches to the set max. speed. If the 

temperature difference Set ∆T between the reference sensors (collector and storage 

tank) is less than the set value, then the speed is decreased by one stage after the 

control time elapses. If the temperature difference between the reference sensors is 

greater than the set value, then the speed is increased by one stage after the control 

time elapses. If the controller has adjusted the speed of the pump down to the smallest 

stage and the Set ∆T between the reference sensors is ∆T off, the pump is switched 

off.

Mode 2:

 After the purging time the controller switches to the set min. speed.  If the 

temperature difference Set ∆T between the reference sensors (collector and storage 

tank) is greater than the set value, then the speed is increased by one stage after the 

control time elapses. If the temperature difference Set ∆T between the reference sen-

sors is below the set value, then the speed is decreased by one stage after the control 

time elapses. If the controller has adjusted the speed of the pump down to the smallest 

stage and the ∆T between the reference sensors is T∆off, the pump is switched off.

Mode 3:

 After the purging time the controller switches to the set min. speed.  If the 

temperature at the reference sensor (collector) is greater than the setpoint to be set 

subsequently, then the speed is increased by one stage after the control time expires. 

If the temperature at the reference sensor (collector) is less than the setpoint to be set 

subsequently, then the speed is decreased by one stage after the control time expires.

Mode 4: 

When the primary storage is loaded, speed control works as in V3.

When the secondary storage is loaded, speed control works as in V2.

With speed control the MTDC

   makes it possible to vary the speed of connected 

pumps.

This function should only be activated by a specialist. Depending on the 

pump and pump stage used, the minimum speed should not be set too 

low, because otherwise the pump or the system may be damaged. The 

information provided by the relevant manufacturer must also be observed! 

If in doubt, the min. speed and the pump stage should generally be set to 

high rather than too low.

Caution

Summary of Contents for MTDC

Page 1: ...Read carefully before installation commissioning and operation Temperature Difference Controller MTDC Installation and operating instructions ...

Page 2: ...2 5 3 Recooling 23 5 4 Frost protection 23 5 5 Seizing protection 23 5 6 Col Alarm 23 6 Special functions 24 6 1 Program selections 24 6 2 Signal V1 24 6 2 1 Type of pump 24 6 2 2 Pump 24 6 2 3 Output Signal 24 6 2 4 0 10V PWM off 25 6 2 5 0 10V PWM on 25 6 2 6 0 10V PWM max 25 6 2 7 Show signal 25 6 3 Speed control 26 6 3 1 Modes 26 6 3 2 Purging time 27 6 3 3 Sweep time 27 6 3 4 max speed 27 6 3...

Page 3: ...n you are unsure which version you have check the type label on the side of the controller If the version is not readable here open the controller s Service values menu The version is shown in the first line of the service values M AC 100 240V 50 60Hz 460VA MTDC Version 5 ...

Page 4: ...he applicable DIN EN standards and the installation and operating instruction of the additional system components must also be observed The controller does not under any circumstances replace any safety devices to be provided by the customer Installation electrical connection commissioning and maintenance of the unit may only be carried out by specialists who possess the appropriate training For t...

Page 5: ...ries Use of the device for other than its intended purpose Operation above or below the limit values listed in the specifications Force majeure A 5 Warranty and liability Changes additions to or conversion of the unit are not permitted without the writ ten permission from the manufacturer It is likewise forbidden to install additional components that have not been tested together with the unit If ...

Page 6: ...sible cable length of sensors and appliances Collector and outdoor sensor 30m other PT1000 sensors 10m CAN 3m PWM 0 10V 3m mechanichal relay 10m Real Time Clock RTC with 24 hour power reserve Permissible ambient conditions Ambient temperature for controller operation 0 C 40 C for transport storage 0 C 60 C Air humidity for controller operation max 85 rel humidity at 25 C for transport storage no m...

Page 7: ...ting menus with explanations Menu block can be activated to prevent unintentional setting changes Resetting to factory settings B 3 About the controller Description of controller Temperature Difference Controller MTDC 3 screws 3 5 x 35 mm and 3 plugs 6 mm for wall installation 6 strain relief clips with 12 screws replacement fuse T2A 250V slow blow Installation and operating instructions MTDC Opti...

Page 8: ...uch the electronics when doing so 4 Hold the lower part of the housing up to the selected position and mark the 3 mounting holes Make sure that the wall surface is as even as possible so that the housing does not become distorted when it is screwed on 5 Using a drill and size 6 bit drill 3 holes at the points marked on the wall and push in the plugs 6 Insert the upper screw and screw it in slightl...

Page 9: ... visible damage Caution Low voltage cables such as temperature sensor cables must be routed separately from mains voltage cables Feed temperature sensor cables only into the left hand side of the unit and mains voltage cables only into the right hand side Caution The customer must provide an all pole disconnecting device e g a heating emergency switch Caution The cables being connected to the unit...

Page 10: ... the same cable duct The controller operates with Pt1000 temperature sensors which are accurate to the degree thus ensuring optimal control of system functions If desired the sensor cables can be extended to a maximum of 30 m using a cable with a cross section of at least 0 75 mm Make sure that there is no con tact resistance Position the sensor precisely in the area to be measured Only use immers...

Page 11: ...ture sensor 4 S4 Temperature sensor GND Mains voltage 230VAC 50 60Hz Terminal Connection for N Neutral conductor N R1 Relay R1 N Neutral conductor N L Mains phase conductor L N Neutral conductor N R2 Relay R2 The PE protective conductor must be con nected to the PE metal terminal block Low voltage max 12V Achtung Main voltage 230VAC Gefahr S4 VFS2 VFS1 CAN CAN V1 S4 S3 S3 S2 S2 S1 S1 PELV N R2 L N...

Page 12: ...as check valves non return valves safety temperature liwithers scalding protectors etc and must therefore be provided ΔT Storage transfer ΔT Universal Delta T Shutoff valve Thermostat S1 S1 S1 S1 S1 S1 S1 S1 S2 S2 S2 S2 S2 S4 S2 S2 S2 R1 V1 R1 V1 R1 V1 R1 V1 R2 R2 R2 R1 R1 V1 R1 V1 S1 S1 S2 S2 S3 S3 R2 R2 R1 V1 R1 V1 Solar with storage Solar with pool Solid fuel boiler with storage Solar with pool...

Page 13: ...S1 S4 S4 S2 S2 S2 S2 S2 S4 S3 S3 S2 S2 S2 S2 S2 S2 R2 S3 R2 S3 S3 S3 S4 R1 V1 R1 V1 R1 V1 R1 V1 R1 V1 R2 R1 V1 R1 V1 R1 V1 R1 V1 R2 R2 R2 R2 R2 R2 R2 R2 R1 V1 R1 V1 Solar with pool and heat exchanger Solar with bypass Solar with 2 storages and switching valve Solar with 2 collector surfaces and 2 pumps Solar with 2 storages and 2 pumps Solar with 2 collector surfaces and switching valve S1 S2 S4 R...

Page 14: ...ed to cancel an entry or to exit a menu If applicable there will be a request for confirmation as to whether the changes which have been made should be saved The function of each of the other three keys 4 is shown in the display line directly above the keys the right hand key is generally has a confirmation and selection function Examples of key functions enlarge shrink values scroll menu down up ...

Page 15: ...guage menu 2 Time Date and Operating Times menu 3 Heating Circuit Settings all values menu 5 Protection Functions if any adjustments necessary menu 6 Special Functions if any adjustments necessary NB The setup wizard can always be selected in Menu 6 8 Caution Consider the explanations for the individual parameters on the following pages and check if further settings are necessary for your applicat...

Page 16: ...es The menu is closed by pressing esc or selecting Exit measurement values If appears on the display instead of the measurement value then there may be a defective or incorrect temperature sensor If the cables are too long or the sensors are not placed optimally the result may be small deviations in the measurement values In this case the display values can be compensated for by making entries on ...

Page 17: ...acturer accepts no liabil ity for the recorded data Statistics 2 1 Operating hours Display of operating hours of the solar pump connected to the controller various time ranges day year are available 2 2 Heat output Display of the heat output of the system 2 3 Graphic overview This provides a clearly organised display of the data listed under 2 1 2 3 as a bar graph Various time ranges are available...

Page 18: ...d thus the connected consumer are switched on and off by pressing a key with no regard to the current temperatures and the parameters which have been set The measured temperatures are also shown to provide an overview and function control 3 3 Off When the operating mode Off is activated all controller functions are switched off This can lead for example to overheating on the solar collector or oth...

Page 19: ...tches the associated pump and or valve on If the temperature at sen sor 1 drops below this value by 5 C then the pump and or the valve are switched off again Caution Thisdoesnotunderanycircumstances replace the safety facilities to be provided by the customer The menu is closed by pressing esc or selecting Exit settings Settings Switch on switch off temperature difference for sensor X If this temp...

Page 20: ...ng the active storage is not possible anymore Danger Temperature values which are set too high can lead to scalding or dam age to the system Scalding protection must be provided by the cus tomer 4 7 ΔT Solar S3 4 8 Tmax S3 4 13 Tmax SB pool Settings see 4 4 ΔT Solar S X Settings see 4 5 Tmax S2 Danger Switch off temperature at pool sensor If this value is exceeded at the applicable sensor the cont...

Page 21: ... setting of the charging priorities for systems with multiple storage tanks the necessary temperature increase of the collector at which the interruption of the charging into the lower priority storage tank is extended by one minute is set here The interruption is extended because the temperature increase of the collector is expected to enable charging in the higher priority storage tank soon As s...

Page 22: ...ature drops below SProt TOff Caution When system protection is on the temperature in the idle collector will be very high thus the pressure in the system will rise and can damage your system Pay close attention to the instructions of the system manufacturer 5 2 Collector protection Collector protection prevents overheating of the collector The pump is switched on to transfer heat from the collecto...

Page 23: ...re then exceeds the value Frost stage 2 by 2 C then the pump switches off again 5 4 Frost protection Protective functions Protective functions In hydraulic systems with solar when the recooling function is activated excess energy from the storage tank is fed back into the collector This only takes place if the temperature in the storage tank is higher than the value Recool Tsetpoint and the collec...

Page 24: ...the program is changed the settings revert to factory settings This menu contains the settings for the speed controlled output V1 6 2 Signal V1 6 2 1 Type of pump The type of speed controlled pump must be entered here Standard Speed control for standard pumps 0 10V Speed control of e g High efficency pumps by 0 10V signal PWM Speed control of e g High efficency pumps by PWM signal In this menu pre...

Page 25: ...age is needed to turn the pump on at minimum speed This determines the output voltage for the highest speed of the pump that is used e g during purging or manual operation Displays the set signal in text and a graphical diagram Special functions 6 2 4 0 10V PWM off 6 2 5 0 10V PWM on 6 2 6 0 10V PWM max 6 2 7 Show signal ...

Page 26: ...he reference sen sors is below the set value then the speed is decreased by one stage after the control time elapses If the controller has adjusted the speed of the pump down to the smallest stage and the T between the reference sensors is T off the pump is switched off Mode 3 After the purging time the controller switches to the set min speed If the temperature at the reference sensor collector i...

Page 27: ...percentages are guide values that may vary to a greater or lesser extent depending on the system pump and pump stage 100 is the maximum possible voltage frequency of the controller 6 3 4 max speed 6 3 5 min speed 6 3 6 Setpoint 6 3 7 Set ΔT The maximum speed of the pump is specified here During the setting the pump runs at the specified speed and the flow rate can be determined The minimum speed o...

Page 28: ...l Boiler Solar with storage with additional function Solar Bypass Solar with heat exchanger with additi onal function Return Flow Increasee 6 5 Relay functions 6 5 1 Solar bypass Use the relay to switch a bypass valve or a bypass pump This can direct the flow pass the storage when the flow temperature at the bypass sensor is lower than the storage that has to be charged 6 5 1 2 Variant 6 5 1 3 Byp...

Page 29: ...tat sensor 2 is connected the relay switches on when T set is undershot at thermostat Sensor 1 and switches off when T set hysteresis at thermostat sensor 2 is exceeded 6 5 2 4 Thermostat Optional switch off sensor When T set hysteresis is exceeded at the optional thermostat sensor 2 the relay is switched off 6 5 2 5 Thermostat 2 For Energy saving mode When Energy saving mode is active During sola...

Page 30: ...t temperature at thermostat sensor 1 Cooling is on above this tempera ture till Co T set hysteresis is reached 6 5 3 3 Co hysteresis If the temperature at th drops below Co T set hysteresis the relay is switched off 6 5 3 4 Cooling sensor Reference sensor of the cooling function 6 5 3 5 Periods Cooling activity times Set the desired periods of time when the cooling should be active 3 periods can b...

Page 31: ...5 5 Field cooling This function controls an external coolig unit to cool down the collector If this temperature is exceeded at the reference sensor the relay is switched on 6 5 5 2 Tmax field When the temperature falls below Tmax field Hys min the relay is switched off 6 5 5 3 Hys min To protect the cooling unit itself from damage the relay is switched off as soon as the temperature at the referen...

Page 32: ...provide complete protection against Legionella because the controller is dependent on sufficient energy being fed in and it is not possible to monitor the temperatu res in the entire range of the storage tanks and the connected piping system To provide complete protection against Legionella bacteria it must be ensured that the temperature is raised to the necessary tem perature and at the same tim...

Page 33: ...drops to T Heat Transfer Off the relay is switched off again Setpointtemperature of the target storage When this temperature is detected in the target storage heat transfer is switched off 6 5 7 4 Setpoint This menu determines the sensor that is placed in the source storage 6 5 7 5 HT Source sensor This determines the sensor placed in the storage that is receiving energy from the source storage Re...

Page 34: ... Difference function This determines the sensor for the heat source 6 5 8 2 Diff Tmin Minimum temperature at source sensor to enable the difference relay When the temperature at the source sensor is below this level the difference function is disabled 6 5 8 6 DF Drain sensor 6 5 8 4 DF Tmax Drain sensor Target sensor for difference function This determines the sensor for the target storage Maximum...

Page 35: ...d off This determines the sensor that is used as boiler sensor 6 5 9 5 Boiler sensor This determines the sensor that is used as storage sensor 6 5 9 6 Storage sensor 6 5 10 Error message The relay is switched on when one or more protective funtion is active or a message is shown This function can be inverted so that the relay is alway on and switches off when a protective function or a message is ...

Page 36: ...f this temperature is exceeded at the room temperature sensor at the set times the relay is switched off 6 5 14 4 Room sensor This menu determines the sensor for the room temperature 6 5 14 5 Periods Set the desired periods of time when the heat circuit day mode should be active 3 periods can be set per day settings can also be copied to other days Outside the set times the heating function is wor...

Page 37: ...low rate is a calculated approximation for function control of the system This determines the sensor that is used to measure the flow temperature This determines the sensor that is used to measure the return temperature Set the type of anti freeze used If none is used please set to 0 The amount of anti freeze agent in the system Flow rate that is used to calculate the heat quantity This determines...

Page 38: ...ce is carried out If the temperature at the collector sen sor increases by the value specified under Increase within one minute then the solar pump is switched on for the set Purging time so that the medium to be measured can be moved to the collector sensor If this still does not result in a normal switch on condition then the start help function is subject to a 5 minute lockout time Caution This...

Page 39: ... set Activate oder deactivate the ethernetfunction 6 15 2 1 Ethernet 6 15 2 4 IP Adress 6 15 2 5 Subnet 6 15 2 6 Gateway 6 15 2 2 MAC Adress 6 15 2 7 DNS Server 6 15 2 3 Auto Configuration DHCP In this menu the settings of the ethernet connection of the data logger can be set Displays the individual MAC address of the data logger In this menu the IP of the gateway for the data logger can be set In...

Page 40: ... Display mode 6 11 Time date 7 Menu lock 8 Service values To lock the other menus select Menu lock on To enable the menus again select Menu lock off Setting range on off default setting off Menu lock Menu 7 Menu lock can be used to secure the controller against unintentional changing of the set values The menu is closed by pressing esc or selecting Exit menu lock 7 Menu lock ...

Page 41: ...sed for remote diagnosis byaspecialistorthemanufac turer in the event of an error etc The menu can be closed at any time by press ing esc Service values 8 Service values Caution Enterthevaluesatthetimewhenthe error occurs e g in the table ...

Page 42: ... select the language for the menu guidance This is queried automatically during initial commis sioning The choice of languages may differ how ever depending on the device design Language selection is not available in every device design Language ...

Page 43: ...the sensor input at the controller or the connecting cable is was defective Resistance table see B 2 Temperature resistance table for Pt1000 sensors Collector alarm Means that the collector has fallen fell below the temperature set under menu 5 6 Collector alarm Restart Means that the controller was restarted for example due to a power failure Check the date time Time Date This message appears aut...

Page 44: ... ror e g pump and exchange it Then first recommission the controller and check the function of the switch outputs in manual mode as described under 3 2 Fuse Malfunctions Danger Danger Repairs and maintenance may only be performed by a specialist Before working on the unit switch off the power supply and secure it against being switched on again Check for the absence of power Only use the supplied ...

Page 45: ...ve the settings optimised if necessary Performing maintenance Check the date and time see 6 11 Time and date Assess check plausibility of analyses see 2 Statistics Check the error memory see 2 4 Message log Verify check plausibility of the current measurement values see 1 Measurement values Check the switch outputs consumers in manual mode see 3 2 Manual Possibly optimise the parameter settings ...

Page 46: ...2 3 1 The controllers are connected in series with the CAN bus cable 1 2 The first and last controller data logger in this connection series must be fitted with a terminating resistor 2 The wiring of the two CAN sockets is optional 3 Optionally the data logger 3 can be integrated in a CAN bus The available CAN functions are subject to the controller type as well as the software version used and ca...

Page 47: ... down see 8 at the time that the suspected malfunction occurs Send the ser vice value table by fax or e mail with a brief description of the error to the specialist or manufacturer In programs 13 with pool the charging of the pool e g for winter operation can be switched off using a simple function To do this simply press and hold the esc key down for several seconds on the diagram overview screen...

Page 48: ...mplete information cannot be excluded Subject as a basic principle to errors and technical changes Hydraulic variant set Commissioned on Commissioned by MTDCv5_en indd 15258 Your specialist dealer Manufacturer SOREL GmbH Mikroelektronik Jahnstr 36 D 45549 Sprockhövel Tel 49 0 2339 60 24 Fax 49 0 2339 60 25 www sorel de info sorel de ...

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