Building Automation Knowledge Base

Issue Replacement Environment Current replacement. Cause Obsoletion of device Resolution The is no direct replacement for the DRT 3801, DRT3851 Sensors with fan switches. The sensor and setpoint can be replaced using a New Part No. STR612/004604700 The fan switches would need to be replaced using a four position switch. Click here to view the DRT3801/DRT3851 data sheet.

Issue Replacement of obsolete actuator Environment Valve actuator replacement Cause Obsolete Valve actuator Resolution The current replacement for the AVUX 2-201 actuator is the AVUX 5-202 Click here to view the data sheet for the AVUX 2-202. Click here to view the data sheet for the AVUX 5-202. .

Issue End connection kits needs to be ordered separately, specified depending on application Environment VZ208E VZ308E VZ408E VZ208C VZ308C VZ408C Cause The end connection kits needs to be ordered separately.  Resolution 1 (one) kit / port  on valve is required, i.e. a VZ208 needs 2 kits, and VZ408 needs 4 kits. See data sheet for details. 

Issue The documentation only describes mounting on curved pipe. Environment STP100 STP101 STP120 STP200 STP201 STP300 STP501 STP600 Cause In some applications, mounting the sensor on a straight pipe is necessary Resolution A description drawing is available here. The installation should be beveled against flow direction and the diameter should not be bigger than half of the diameter of the pipe.

Issue CZU1201 replacement Environment CZU1201 Cause The CZU1201 requires replacement, but the controller had a exposed setpoint adjust dial on its fascia, the replacement CZU4201 does not. Resolution Replace the CZU1201 with the CZU4201 and a STR612 setpoint adjust unit, Wire to terminals 9 and 10 on the controller, set the internal setpoint on the controller to 10'C. CZU1201 datasheet click here. CZU4201 datasheet click here. STR612 datasheet click here.

Issue The TAC 200 OTP is obsolete, and the available documentation may be hard to find. Environment TAC 200 OTP 2001005000 Cause Documentation for obsolete products may be hard to find. Resolution All available documentation is available here

Issue M-AF230 is no longer available for ordering. Environment M-AF230 8750000010 MD20SR MD20SR-24/230T Cause Obsolete actuator needs replacement Resolution The M-AF230 is replaced by MD20SR-24/230T. Please see PA_00153 and other related documentation for more details. 

Issue Cannot order the VZ*8 valves, its no longer available.  Environment VZ*8 VZ*08C Cause A new line of VZ valves is now available. Resolution The old VZ series actuators have been replaced with a new. The old (VZ*8) is replaced by the VZ*18. for more information and details, please see PA_00156 and the related data sheets. Click here.  

Issue Which accessories and linkage kits are available? Environment MD5 MD10 MD20 MD40 AF LF Damper actuator Cause Accessories availability for damper actuators Resolution All available accessories are available in this document.

Issue TA 240 U Tour Andersson Controller Environment Site with a TA 240 U Tour Andersson Controller Cause Controller needs change in programming Resolution Attached Manual for the Tour Andersson 240 can be found HERE. 

Issue Need replacement for AVUM4601 valve actuator Environment VEU, MEU, FEU, VZX, MZX Cause Need replacement for AVUM4601, AVUE4304, AVUE4354 or AVUX4202 valve actuator Resolution Use AVUM5601 actuator, this is the replacement for AVUM4601 230Vac actuator  Also AVUE4304 is replaced by AVUE5304 AVUE4354 is replaced by AVUE5354 AVUX4202 is replaced by AVUX5202 Click HERE for the datasheet Click HERE for the Installation Instructions

Issue What are the Low and High level security default passwords for the SMT 1201 controller? Environment SMT 1201 Low security password High security password Cause Customer is unable to access the controller. Resolution The "Default" passwords for the SMT 1201 are as follows; Low level security is "0000" High level security is "12345678" For the controller data sheet please click HERE. If the passwords are not accepted, then please contact Product Support by selecting the "Contact" option.

Issue The .xif file for MZ09L and MZ18L is not available on the Extranet. Environment MZ09L 8455112000 MZ18L 8455102000 Cause The .xif file for MZ09L and MZ18L is sometimes necessary for use in projects. Resolution The current version (as of  Sept. 10 2012) is available for download here. Both actuators have the same Lonmark profile and the .xif file is common to both.

Issue Dimension comparison when replacing MZF valve with VG311 or V321 Environment MZF V321 VG311F Cause Replacing Satchwell MZF valves, the new valve is a different size, i.e. larger. Resolution The Satchwell MZF valve is a physically smaller valve when compared to other manufacturers valves of the same DN. The only solution is to modify the pipework. For the valve datasheets click on the relevant valve type MZF VG311F V321 The table below details the differences.

Issue Satchwell DuoFlow Information Environment DuoFlow DM5601 SA2452 TLX2259 Cause Drawing for a Satchwell DuoFlow System using a DM5601 valve and actuator. Resolution Download here drawing for a Satchwell DuoFlow system. DuoFlow Valve/Actuator cable colours are as follows: White = Central Heating Orange = Hot water Yellow = Mid Position (Central Heating and Hot Water) Blue = Neutral Note 1: The DuoFlow actuator wiring is different to a Mid-Position actuator, therefore conversion from a DuoFlow system is best done by replacing the wiring centre as well, The room and cylinder thermostat can be retained. Note 2: The domestic valve and actuator part of the business is now part of SUNVIC. Sunvic Controls Ltd. General Enquiries :- T: +44 (0) 1698 812 944 F: +44 (0) 1698 813 637 Email. enquiries@sunvic.co.uk Technical Helpline :- T: +44 (0) 1698 810 945 Email.  technical@sunvic.co.uk

Issue Replacing a Satchwell DR2252 sensor. Environment DR2252 Sensor Detector Replacement Cause The Satchwell DR2252 sensor is obsolete, and there is not a direct replacement. Resolution The Satchwell DR2252 sensor is obsolete and the nearest replacement is the Schneider Electric STR614, but this is not a direct replacement. The DR2252 sensor had a sensing element with a resistance of 1690 ohms at 20'C, and a concealed 10/35'C adjustable scale. The Schneider Electric STR614 sensor has a sensing element with a resistance of 1690 ohms at 20'C, it does not have a concealed adjustment scale. For the Schneider Electric STR600 series of sensors, please click HERE.

Issue Since the V392 is no longer available, a replacement valve is requested. Environment V392 Forta Cause Replacing old V392 valve. Resolution No direct replacement is available. Closest in application should be V311T with a Forta actuator, but it will require pipe work to fit.  To review the V392 data sheet, please click HERE.

Issue A displayed on main display. Environment CMC CSMC A Alarm Cause Showing A for alarm on the display Resolution Set code B61 to 1 Click here to download the data sheets.

Issue Unable to locate datasheet. Environment SHR100 SHR100 T Cause Details of the temperature and humidity connections are required. Resolution The connection details and thermistor types are shown below; To review the complete datasheet please click HERE.

Issue What is the replacement for the Drayton Autotherm? Environment Drayton Autotherm Cause The Drayton TA/L1 actuator is obsolete, and no like for like actuators are available, this makes the Autotherm controller unusable. Resolution The TA/L1 actuator provides positional feedback to the Autotherm controller, and actuators providing feedback are very few, and providing the correct feedback is not possible. The Autotherm controller provides considerable functionality, and in our current  ranges of controllers, these cannot be matched. To upload the Autotherm data sheet, please click HERE.     The most appropriate replacement controller is CSC5352. This device will provide a compensated heating system with a timed start, the output relay can be used to enable the hot water system. Please click HERE to upload the data sheet. If separate time periods are required for the heating system and how water system, then the DC1100/1400 should be considered. Please click HERE to upload the data sheet. Please note that in both of the above options, new sensors will be required and possibly actuators too.