Building Automation Knowledge Base

Issue DC2100 series Optimiser / Compensator Controller requires resetting to default values due to exposure to electrical corruption. Environment DC2100 series Optimiser / Compensator Controller installed to control Variable Temperature Mixing Valve, Boiler/s, Pumps etc. 2100H DC 2100 Cause DC2100 series Optimiser / Compensator Controller has been exposed to electrical corruption. Resolution DC2100 series Optimiser / Compensator Controller may be reset to default values as follows :-  Isolate power to Controller. Open Door of Controller. Locate PCB on rear of Controller Door. Locate pair of Steel Pins (marked PL1) on PCB. Link out pair of Steel Pins for 10 seconds approx. Remove Link. Close Door of Controller. Reinstate power to Controller. Re-programme Controller. Re-programming procedure for the DC2100 series Optimiser / Compensator Controller may be viewed here. Should the above reset to default values procedure fail to enable the DC2100 series Optimiser / Compensator Controller to be re-programmed then replacement of the Controller may need to be considered. POSSIBLE REPLACEMENT  The most common control application to which theDC2100 series Optimiser / Compensator Controller may be applied comprises the following combination of inputs and outputs.  Outside Air Temperature Sensor Inside Air Temperature Sensor Compensated Heating Temperature Sensor Variable Temperature Heating Circuit Valve Actuator Boiler/s (2 maximum) H W S On/Off output (independent) Should such inputs and outputs be confirmed then the DC1100 Optimiser / Compensator may be installed in place of the DC2100 series Optimiser / Compensator Controller. Details of the DC1100 Optimiser / Compensator Controller may be viewed here. Drayton A7xx series Sensors connected to the DC2100 Optimiser / Compensator Controller are compatible with the DC1100 Optimiser / Compensator Controller and may therefore be retained. N.B. It should be noted that where a DC2100 series Optimiser / Compensator Controller is included in an installation of a more complex nature then an alternative solution utilizing different products may need to be considered In such installations not only will the DC2100 series Optimiser / Compensator Controller need to be replaced but its associated Sensors will also need to be replaced. Resolutions to such installations may best be determined following a review of the control system installed by a member of the local Schneider Electric office.

Issue DC2100 series Optimiser / Compensator Controller requires replacement due to obsolescence. Environment DC2100 series Optimiser / Compensator Controller installed to control Variable Temperature Mixing Valve, Boiler/s, Pumps etc. Cause Obsolescence of DC2100 series Optimiser / Compensator Controller. Resolution OVERVIEW DC2100 series Optimiser / Compensator Controllers are flexible with regard to the number and type of electrical inputs and outputs to which they may be connected, enabling the Controller to be applied to a wide range of control applications.  Of the DC2100 series Optimiser / Compensator Controller models manufactured, the final version was the DC2100H Overview details of the DC2100H Optimiser / Compensator Controller may be viewed here. INSTALLATION AND COMMISSIONING In view of the numerous control applications to which the DC2100 series Optimiser / Compensator Controller may be applied, numerous wiring connection variations will also apply. Please therefore check the number of inputs and outputs connected to the DC2100 series Optimiser / Compensator Controller installed before proceeding, as this will assist in determining the suitability of the possible replacement Controller suggested below. Installation and Commissioning details of the DC2100H series Optimiser / Compensator Controller may be viewed here. POSSIBLE REPLACEMENT  The most common control application to which theDC2100 series Optimiser / Compensator Controller may be applied comprises the following combination of inputs and outputs.  Outside Air Temperature Sensor Inside Air Temperature Sensor Compensated Heating Temperature Sensor Variable Temperature Heating Circuit Valve Actuator Boiler/s (2 maximum) H W S On/Off output (independent) Should such inputs and outputs be confirmed then the DC1100 Optimiser / Compensator may be installed in place of the DC2100 series Optimiser / Compensator Controller. Details of the DC1100 Optimiser / Compensator Controller may be viewed here. Drayton A7xx series Sensors connected to the DC2100 Optimiser / Compensator Controller are compatible with the DC1100 Optimiser / Compensator Controller and may therefore be retained. N.B. It should be noted that where a DC2100 series Optimiser / Compensator Controller is included in an installation of a more complex nature then an alternative solution utilizing different products may need to be considered. In such installations not only will the DC2100 series Optimiser / Compensator Controller need to be replaced but its associated Sensors will also need to be replaced. Resolutions to such installations may best be determined following a review of the control system installed by a member of the local Schneider Electric office.

Issue Controlli S300 Actuator Environment Controlli S300 Actuator Cause Controlli S300 Actuator terminal details. Resolution L=Neutral L'=230Vac B=Close signal from thermostat or control device R=230V to thermostat or control device V=Open signal from thermostat or control device To test: Place a wire link between R and B, the valve actuator will close, place a wire link between R and V, the valve actuator will open. If a auxiliary switch kit D22 is fitted, this can be used to signal the boiler/pump to start if the installation was a domestic. For the actuator datasheet click here.

Issue Replacement controller for the KMC 3201. Product Line Field Devices Environment KMC 3201 application 4 Cause The KMC 3201 is no longer available. Resolution The KMC 3201 is a multi-application configurable controller, and this article only deals with replacing a controller running application 4, Two stage temperature control. For the KMC data sheet please click HERE. The replacement for the KMC 2301 using application 4, is the CZT5305, click HERE for the data sheet. Please note this is not a like for like change, installation and wiring changes will be necessary.

Issue Controller used in compensation mode from the outside temperature sensor. Environment MMC 2401 Controller Compensation Cause Explanation of codes used when in compensated mode. Resolution The compensation mode is selected by choosing code 17 and entering value 001 There are a number of codes which are relevant, the main codes are listed below. 6 = Outside Temperature Changeover 1 - default value = 20 7 = Outside Temperature Changeover 2 - default value = -5 10 = Compensator Set Value - default value = 30 11 = Ratio 1  - default value = -15 12 = Ratio 2  - default value = -25 13 = Ratio 3  - default value = 0 The screen shot below shows have the above settings are used. For the MMC data sheet please click HERE. and for the full details click HERE.

Issue Veris HW sensor part number for displaying both the temperature and humidity readings on the sensor's LCD Environment Veris HW Series deluxe wall humidity sensors Cause There is a need to display both the humidity and temperature readings on the sensor's LCD Resolution In order for unit to display both temperature and humidity, use the TA or D temp selection in the part number. Refer to the HW series sensors datasheet.

Issue Is there a replacement for the EM52L actuator? Environment EM52L actuator 8522221010 Cause The EM52L actuator is obsolete. Resolution Both the EM52L actuator and the V354/V355 valves that are associated with it are obsolete, so both will need replacing. The replacements would be the MZ20A (Selectable control signal) or the MZ20A-R (Fixed 0-10v control) actuator, with the VZ*19 range of valves. For a data sheet for the MZ20A actuator, please click HERE. For a data sheet for the VZ*19 valve range, please click HERE.  

Issue V241 / V341 valves do not automatically come complete with connections. Environment Valves V241 V341 Connections Pipework connections Cause The valve body is purchased separately to the connections. Resolution When purchasing a V241 / V341 valve it must be remembered that the valve body and the connections have separate specification numbers. Example to purchase a 32mm V341 valve. Valve body - 731-4141-000 Connection types available; Internal thread connection (Standard) - 911-2100-32 (*3) Soldering type connection (Standard) - 911-2101-32 (*3) Welded type connection (Standard) - 911-2102-32 (*3) Note:- you will require the same number of connections as there are ports on the valve. For the details of the V241 please click HERE. For the details of the V341 please click HERE. For the details of the connections please click HERE.

Issue Can old generation temperature sensors or new generation temperature sensors be used on CXR, CXT, CZT, CSC5252, CSC5352 ? Environment CXR CXT CZT CSC CSC5252 CSC5352 CSC 5252 CSC 5352 Cause Can old generation sensors or new generation sensors be used on CXR, CXT, CZT, CSC5252, CSC5352? Resolution Existing old generation sensors can be used on the current range of discrete controller, however they CANNOT be used/mixed with new generation sensors. Note, when replacing sensors or upgrading a controller to the current version, terminal numbers are different between old generation and new generation sensors, see the datasheet for terminal numbers. For the CXT datasheet click here. For the CXR datasheet click here. For the CZT datasheet click here. For the CSC5252 or 5352 datasheet click here.

Issue My computer has USB ports, but it does not have serial or com ports. Can I use USB ports? Environment For I/NET, Host computer that either Direct Connects (cable 072) or you need to connect to a controller such as a 7798C (cable 082) Continuum, Vista, Sigma, I/A Series, Pelco, DVR, DS, Com Port, Com, PTZ Control, Serial Port, Comm, Comm Port Cause USB to Com has issues downloading or communicating with system. Resolution The generic drivers which came with your USB to Com adapter do not allow two-way communication.  Prolific driver often helps resolve this issue. Download driver HERE or for the latest driver use link below: http://www.prolific.com.tw/US/CustomerLogin.aspx    you will need to logon as GUEST  

Issue CSMC 3805 Codes, CSMC User Guide. Environment CSMC3805 CSMC CSMC 3805 Cause There is a code displayed on the controller screen. What does this mean? Resolution The codes display the plant status under certain conditions. They are as follows: L05 = Return Water Temperature Low Limit. F = Water Frost Limit (Flow or Return). L01 = Inside Low Limit (Frost). H4 = Flow Water High Limit. A = Alarm (If alarm display is not required set code B61 to 1). 0 to 9 = Optimiser Status (only displayed if code B49 is set to 1). The User Guide can be downloaded from here.    

Issue In certain situations, LonWorks devices, such as Viconics thermostats, have the ability to display the current year/date/time on the display. The only way to ensure the time is correct to these time capable LonWorks devices is to send the year/date/time information to them via a time_stamp SNVT. Environment Lonworks Menta Viconics thermostats Cause Time stamp needed by LonWorks devices via SNVT binding. Resolution Please download and insert this SNVT_time_stamp Menta macro into the Menta application.

Issue What are CZT, CXT, CXR Controllers? Why are CZT, CXT, CXR Controllers used? What is Proportional, Integral Action and Derivative control. Why does a controller deliver different pulse lengths to the valve and not drive it fully open or closed? What is Pb, IA, PID? Environment CZT CXT CXR DC1100 DC1400 Proportional, Integral Action, Derivative, Pb, IA, PID Cause What do these controllers do and what are their applications? What is Proportional, Integral Action and Derivative control. Why does a controller deliver different pulse lengths to the valve and not drive it fully open or closed? What is Pb, IA, PID? Why is a 0-10V Signal used? Why is a 3 point control / Open Closed actuator used? Resolution Proportional Controllers are used in applications where there are long time lags e.g. room control, return air control, storage calorifier (HWS). Where the controlling sensor is a medium to long distance from the heat/cooling source. An example of a proportional controller is the Satchwell CZT. Integral action controllers are used in applications where there are short time lags e.g. supply air control, frost coil control, non-storage calorifiers. Where the controlling sensor is a short distance from the heat/cooling source. An example of a integral controller is the Satchwell CXT or the CXR. The CXR is a controller where the supply air is controlled, but the setpoint is reset by the return air or space temperature, therefore the time lag is short. Other controllers that fall into this category are the DC1100, DC1400 again the controlling sensor (mixed flow temp) is located a short distance from the heat source.  The term proportional band (Pb) is where the valve is moved to a position proportional to the deviation from setpoint. 0-10V modulating actuators are generally used on these controllers. The term integral action (Ia) is where the valve is moved at a rate according to the deviation from setpoint i.e. the valve is given longer pulses the further away from setpoint, shorter pulses as it gets closer. 3 point control/pulsed pair/open-close actuators are generally used on these controllers. Further to proportional controllers, inherent offset (the setpoint is never quite reached) can be an issue. Integral action can be applied to remove this offset. These controllers are primarily proportional, but integral action can be found on them and is applied. Hence the term PI or PI controller. Derivative control is generally only found on BMS controllers and is used occasionally with PI control, hence the term PID. Here the derivative action moves the valve proportionally to the change from setpoint. It is complex and is rarely used. Further detail about CSC controllers can be found here. Further detail about CXT controllers can be found here. Further detail about CXR controllers can be found here. Further detail about CZT controllers can be found here. Further detail about DC1100 and DC1400 controllers can be found here.

Issue Changes to the Set Space Temperature do not work. Environment DC1100 DC1400 Controller Compensator Optimiser Setpoint Cause The pump overrun is timing down and will not allow the controller to act normally until it is complete. Resolution If the "Set Space Temperature" value is modified, then after the rotary switch is returned to "Auto", the user must wait until the Pump Overrun function has timed out. Where adjustments are generally being made, it is recommended that the Pump Overrun setting is set to 1 minute until  testing has been completed, after which it should be return to its required setting. To change the Pump Overrun setting carry out the following: Turn the rotary switch to "Setup". Select "System Menus" then "Alter Settings", and then enter the password of 0112. Select "Compensator", then "Set-up Menu", and then "Pump Overrun". Note the current value then change it to 1. On completion of the tests return the setting to its correct value. For the DC1100 data sheet, click here. For the DC1400 data sheet, click here.

Issue Testing operation of a CSC1701 compensator. Environment CSC 1701 Compensator Climatronic Cause Help with testing controller operation. Resolution The controller operation can be tested as follows; 1 - Testing the actuator operation. This is achieved using the controller +/- settings. Select + and the actuator will drive fully open. Select - and the actuator will drive fully closed. 2 - Testing the sensors. Isolate the power to the controller, and detach the controller front from the base. For each of the sensors disconnect one sensor wire. Using a multi meter measure the resistance between the disconnected wire and the sensor terminal with the wire still connected, this should give you a resistance reading. Refer to the resistance chart to confirm the temperature reading. Because of age the accuracy may not be perfect. Repeat for all sensors. 3 - Controller operation. With the sensors reconnected and the controller powered again, set the controller to "Day mode and Auto". Confirm that for the current outside temperature, the compensated flow water temperature is correct. To download the controller data sheet please click HERE. To download the sensor resistance charts please click HERE.

Issue Boiler plant is not operating. Environment DC1100 DC1400 Compensator Plant Off Day Economy Cause Controller is in a Day Economy mode. Resolution The DC1100 / DC1400 has a mode known as "Day Economy, this will prevent the plant from working. The controller display will show "Day Economy", its operation is as follows. Day Economy Day economy will allow the system to turn the heating off during an occupation period if the space temperature is at or above the Space Setpoint and the outside temperature is within 4 degrees of the Space Setpoint. When the heating is switched off by day economy, pump run-on will commence. If during a day economy period the space temperature drops more than 1 degree below setpoint or the outside temperature is no longer within 4 degrees of the Space Setpoint then the heating will switch back on. The Day Economy function can be disabled though the controller menu system. For further details please select the data sheet HERE.

Issue RM3601 / XRM3201 Wiring connection details. Environment RM3601 3601 XRM3201 3201 Actuators Wiring connection details Cause Actuator wiring details. Resolution The RM3601 actuator is a 230 volt actuator, its connection details are as follows; Terminal 1 - Connection for open signal (230V live) Terminal 2 - Connection for close signal. (230V live) Terminal 3 - Connection for Neutral. Terminal 1T - Transfer connection, passes 230V to other devices when actuator is open. Terminal 2T - Transfer connection, passes 230V to other devices when actuator is closed. The XRM3201 actuator is a 24 volt actuator, its connection details are as follows; Terminal 1 - Connection for open signal (24 volts) Terminal 2 - Connection for close signal. (24 volts) Terminal 3 - Connection for zero volt. Terminal 1T - Transfer connection, passes 24V to other devices when actuator is open. Terminal 2T - Transfer connection, passes 24V to other devices when actuator is closed. To review the data sheet please select HERE.

Issue The Drayton Theta YBM3 Valve Body / Actuator assembly is to be replaced. Environment Replacement Drayton Actuator Valve YBM3 Cause The Drayton Theta YBM3 Valve Body / Actuator assembly is obsolete.> Resolution OVERVIEW The Drayton Theta YBM3 Valve Body / Actuator assembly is obsolete, and there is no purpose built replacement. The Valve Body was available in 1.1/4", 1.1/2" and 2" B.S.P. sizes and was normally installed as a mixing valve in variable temperature, constant volume, compensated heating circuits. No Valve Body / Actuator assemblies are currently available in these sizes. Details of the YB Valve Body may be viewed here.   VALVE BODY REPLACEMENT To replace the YBM3 Valve Body the following is required:- S-E Satchwell MB Valve Body of appropriate size - MB1552 (1.1/4"), MB1602 (1.1/2"), MB1652 (2") Details of the MB Valve Body may be viewed here.   ACTUATOR REPLACEMENT The YBM3 Actuator comprised a 3-wire electrical connection enabling it to be operated by a Mains Voltage changeover contact device as follows :-  Terminal M1 – Open signal Terminal M2 – Close signal Terminal M3 – Common  The YBM3 Actuator may be replaced by one or other of the following S-E Actuators :- MD10B-230 MD20B-230 (if MD10B-230 not available) Details of the MD10B-230 Actuator may be viewed here. Details of the MD20B-230 Actuator may be viewed here. N.B. The YBM3 Actuator may also have included an additional 2-wire electrical connection associated with integral Transfer Switches wired as follows :-  Terminal M4 – M1 made to M4 when YBM3 Fully Closed (230Vac) Terminal M5 – M2 made to M5 when YBM3 Fully Open (230Vac) Where external wiring is connected to YBM3 Transfer Switch Terminals M4 or M5 then an Auxiliary Switch Kit containing two S.P.C.O. Auxiliary Switches should be installed on the MD Actuator. Auxiliary Switch Kit MD-S2 (914-1061-000) Details of the MD-S2 Auxiliary Switch Kit may be viewed here. Where external wiring is connected to YBL3 Terminal M4 then the MD-S2 Auxiliary Switch Kit should be wired as follows :- Terminal S1 (Common) - connect to 230Vac power source Terminal S2 (Normally Closed) - connect to 230Vac device previously connected to YBL3 Terminal M4 Terminal S3 (Normally Open) - no connection necessary Where external wiring is connected to YBL3 Terminal M5 then the MD-S2 Auxiliary Switch Kit should be wired as follows :- Terminal S4 (Common) - connect to independent 230Vac supply Terminal S5 (Normally Closed) - no connection necessary Terminal S6 (Normally Open) - connect to 230Vac device previously connected to YBL3 Terminal M5   LINKAGE KIT A Linkage Kit will also be required in order to enable the MD Actuator to be mounted on the MB Valve Body. Linkage Kit LMD/AR-MB (914-1071-000) Details of the LMD/AR-MB Linkage Kit may be viewed here In such 3-wire installations the YBM3 Valve / Actuator assembly only will need to be replaced, while any associated Controller and Sensors may be retained.

Issue When changing an ARM/X/E type actuator that was mounted on an MB or MBF valve a new linkage kit is required. Environment Valve MB MBX MBF ARE ARX ARM Linkage Actuator MD Cause When fitting a new stype actuator to an MB/MF valve a new linkage kit is required. Resolution MD20a/b Linkage kits MB-914-1071-000 MBF-914-1070-000 (Use self tappers that came with the act to fix the linkage) If you have auxiliary switches you will also need to purchase the aux SW kit for the MD10/20 b = MD-S2 Click here to view the data sheet for the MD20 B actuator, where you will find further information.

Issue DC1100 / DC1400 Optimiser / Compensator Controller switched contact output compatibility with existing Boiler / Pump / Control Valve Actuator control circuits. Environment Stand alone Optimiser / Compensator Controller CMC1801 CMC1802 CMC1803 CMC1826 CMC3803 CSMC3804 CSMC3805 DC1100 DC1400 Contacts Output Cause DC1100 / DC1400 Optimiser / Compensator Controller is to be connected to existing Boiler / Pump / Control Valve Actuator control circuits previously connected to Satchwell CMC or CSMC Optimiser / Compensator Controller. Resolution IMPORTANT NOTE Satchwell CMC / CSMC Controller output contacts are VOLT FREE. S-E Satchwell DC1100 / DC1400 Controller output contacts are LIVE MAINS VOLTAGE. It may therefore be necessary to install Relays between the DC1100 / DC1400 outputs and any Plant Control Circuits / Control System Devices under control. For example, where a 24v Valve Actuator was originally controlled via volt free contact outputs of a CMC / CSMC Controller then the Actuator may now need to be controlled via live mains voltage contact outputs of a DC1400 Controller. A 230v coil Relay will therefore need to be connected to the Valve Open contact output of the DC1400 Controller while another 230v coil Relay is connected to the Valve Close contact output of the DC1400 Controller. The 24v power to drive the Valve Actuator Open and the 24v power to drive the Valve Actuator Close should then be connected to the Valve Actuator via the contacts of the appropriate Relays. Should the 24v power source originally have been provided by the CMC / CSMC Controller and no other 24v power source is available on the existing installation then this may be remedied by the installation of a S-E TR 230/24v Transformer. N. B. Normally a Satchwell CMC or CSMC Controller would be replaced by a S-E Satchwell DC1400 Controller in order that existing Satchwell Sensors may be retained for connection to the DC1400 Controller. In the event that a Satchwell CMC or CSMC Controller should be replaced by a S-E Satchwell DC1100 Controller then any existing Satchwell Sensors will also need to be replaced. DC1100 Overview details appear here. DC1100 Wiring and Commissioning details appear here. DC1400 Overview details appear here. DC1400 Wiring and Commissioning details appear here. TR Transformer details appear here