Building Automation Knowledge Base

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 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

Issue What are the Drayton controller passwords? Environment Drayton DC2100 DC 2100 DC 3000 DC3000 Cause Password is not known. Resolution The password for the DC 2100 is 4012, for controller documentation please click HERE. The password for the DC 3000 is 012, for controller documentation please click HERE.

Issue Replace Invensys Actuator Model MA5-419-500-0-3 Environment Damper Control Actuator site Cause Replacement Specifications for Obsolete Invensys MA5-419-500 which is a Two Position Damper Actuator, SR, 240V, 50 Hz, 60 lb-in, w/SPDT Aux. Switch Resolution The closest replacement would be the MD5B-24(-S)/-230(-S) On/Off or 3-point 24 V AC/230 V AC Damper Actuator 5 Nm (45 in-lb). Note: This is a Rockford, Illinois offering, which we would not normally have offered this in Europe in the past. There is a range of Non-Spring Return Damper Actuators detailed in Pages 54 and 55 of the below Schneider Electric Catalogue. Similarly there is a range of Spring Return Damper Actuators detailed in Pages 56 through 58 of the below Schneider Electric Catalogue. Damper Actuator Accessories are shown on Page 59 of the below Schneider Electric Catalogue. Schneider Electric HVAC Valve and Actuator Catalogue  

Issue Satchwell CZU Mk 1 Zonemaster Controller requires replacement. Environment Stand alone Fan Coil Unit Temperature Controller. Satchwell CZU Mk 1 Zonemaster Controller. CZU 1201 CZU 1202 CZU 1203 Cause Obsolescence of Satchwell CZU Mk 1 Zonemaster Controller. Resolution OVERVIEW Replacement of Satchwell CZU Mk 1 Zonemaster Controller with S-E Satchwell CZU Mk 4 Zonemaster Controller. The CZU 4201 may be used to replace the following CZU Mk 1 Controllers :- CZU 1201, CZU 1202, CZU 1203 N. B. CZU 1201 Controllers provided an additional -9 to +9 V d.c. output enabling connection to peripherals such as the Satchwell NSU 1401 Night Set-back Override Unit, TSU 1402 Two Step Auxiliary Unit and SSU 1403 Signal Selector Unit. CZU 1202 and CZU 1203 Controllers provided an additional -0.5 to +9 or -9 to +0.5 V d.c. output enabling connection to the Satchwell NSU 1401 Night Set-back Override Unit. Additional outputs are not provided on the CZU 4201 Controller and in those applications where these are required then it will be necessary to consider an alternative Controller to the CZU 4201. Details of the CZU 4201 may be viewed here.   CZU Mk 1 CONTROLLER - INTEGRAL TEMPERATURE SENSOR APPLICATION CZU Mk 1 Controllers were manufactured with an integral Temperature Sensor. Adjustment of setpoint was undertaken by means of a dial mounted on the front of the Controller housing. This enabled the Controller to be installed in the controlled space. The CZU 4201 however is intended to be installed either in or on a Fan Coil Unit casing or in a ceiling void. No setpoint dial is mounted on the front of the CZU 4201 housing, thus precluding installation of the Controller in the controlled space. Where an existing CZU Mk 1 Controller is installed in the controlled space and is to be replaced, it will be necessary to install an Adjustable Room Temperature Sensor in the controlled space in order that a CZU 4201 may be utilised as a replacement. The S E STR 612 Adjustable Room Temperature Sensor may be utilised for this purpose. Details of the STR 612 may be viewed here. Any existing Actuator / Valve Body assemblies connected to the CZU Mk 1 Controller may be retained for connection to the CZU 4201.   CZU Mk 1 CONTROLLER - EXTERNAL TEMPERATURE SENSOR APPLICATION In some instances an existing CZU Mk 1 Controller may have been installed with its integral Temperature Sensor disabled. In such instances a remote Satchwell Adjustable Room Temperature Sensor such as the DRT 3451, or a remote Satchwell Duct Temperature Sensor from the DDU range of Sensors may have been installed and connected to the Controller.. Any existing remote Satchwell Temperature Sensors may be retained for connection to the CZU 4201. Should the remote Satchwell Adjustable Room Temperature Sensor require replacement then this may be replaced by an S E STR 612 Adjustable Room Temperature Sensor. Details of the STR 612 may be viewed here. Should the remote Satchwell Duct Temperature Sensor require replacement then this may be replaced by an S E STD 670 Duct Temperature Sensor. Details of the STD 670 may be viewed here.

Issue Satchwell ALi series Linear Actuator requires replacement. Environment Satchwell ALi series Linear Actuator installed on Satchwell MJF, MZ, MZF, VJF, VSF, VZ or VZF series Plug and Seat Valve Body. Actuator type :- ALi series. Cause Obsolescence of Satchwell ALi series Linear Actuator. Resolution Replace Satchwell ALi series Linear Actuator with S-E M800 Linear Actuator and Linkage Kit :- ALi = M800 + L2SV (880-0124-000) Linkage Kit. N.B. Should the Satchwell ALi series Actuator include a wired Auxiliary Switch then the following Accessory should also be installed on the S-E M800 Actuator as appropriate :- S2 - Two independent 24 volt 4amp AC-1 rated SPDT Auxiliary End Point Switches. (880-0104-000)   Particular care should be taken when selecting an S-E Forta M800 Actuator to replace an existing Satchwell ALi series Actuator. The S-E Forta M800 Actuator may be used to replace an existing Satchwell ALi series Actuator but it should be noted that where an existing Satchwell ALi series Actuator has been connected directly to a Satchwell Controller, an independent Transformer rated to provide the greater level of power required by a single S-E Forta M800 Actuator (50VA) will also be required. (e.g. S-E Transformer Type TR60) Where an existing Satchwell ALi series Actuator has been connected via an independent Transformer, it is possible that the Transformer may have been rated to provide the level of power required by a single ALi series Actuator (16VA) only. In such circumstances the existing independent Transformer will also require replacement by another independent Transformer, rated to provide the greater level of power required by a single S-E Forta M800 Actuator (50VA) (e.g. S-E Transformer Type TR60) Details of the Schneider Electric M800 Actuator may be viewed here Details of the Schneider Electric TR60 Transformer may be viewed here Details of the Schneider Electric L2SV Linkage Kit may be viewed here

Issue Satchwell CD2201 Compensator Controller–Actuator requires replacement. Environment Stand alone discreet Satchwell CD2201 Compensator Controller–Actuator Cause Obsolescence of Satchwell CD2201 Compensator Controller–Actuator Resolution Replace Satchwell CD2201 Compensator Controller–Actuator with Schneider Electric Satchwell CSC Compensator Controller, compatible Temperature Sensors and MD Series Actuator and Linkage Kit. Replace Satchwell CD2201 Compensator Controller–Actuator with Schneider Electric Satchwell CSC Compensator Controller. N.B. Two models of the Schneider Electric Satchwell CSC Compensator Controller are available :- CSC 5252 Compensator Controller without Time Clock CSC 5352 Compensator Controller with integral Time Clock  Details of the Schneider Electric Satchwell CSC Compensator Controllers may be viewed here. It should be noted however that the CD2201 Compensator Controller–Actuator had no integral Time Clock. Replacement of Air Temperature Sensors It should be noted that the existing Satchwell Outside Air Temperature Sensor associated with the CD2201 Compensator Controller–Actuator is obsolete and should be replaced. Similarly, it should be noted that the existing Satchwell Inside Air Temperature Sensor associated with the CD2201 Compensator Controller–Actuator is obsolete and should be replaced. Details of replacement Schneider Electric STO600 Outside Air Temperature Sensor may be viewed here. Details of replacement Schneider Electric STR600 series Inside Air Temperature Sensor may be viewed here. N.B. It should be noted that the CSC Compensator Controller will perform entirely satisfactorily without the connection of an Inside Air Temperature Sensor. Replacement of Water Temperature Sensor. It should be noted that the existing integral Satchwell Water Temperature Sensor associated with the CD2201 Compensator Controller – Actuator cannot be re-used and should therefore be replaced. In order to minimise mechanical work it is suggested that a Surface Mounting Temperature Sensor is installed on the pipework, rather than an Immersion Temperature Sensor installed in a Pocket in the pipework. Details of replacement Schneider Electric STC600 Surface Temperature Sensor may be viewed here. Replacement of Actuator. Whilst the existing Satchwell MB Valve Body may be retained, a new Schneider Electric Actuator and Linkage Kit will need to be installed on the MB Valve Body in order to permit control from the CSC Compensator Controller. Details of the Schneider Electric MD10B Actuator may be viewed here. Details of the Schneider Electric LMD/AR-MB Linkage Kit may be viewed here. Please be aware: since July 2016 the CSC compensator and other descrete controllers were withdrawn from service. To see "PA-00479 - Discrete Controllers - Notice of Withdrawal - Satchwell" click here.

Issue The controller displays dashes instead of showing the expected temperatures. Environment CSC CSC5252 CSC5352 Temperatures are not displayed. Dashes displayed Cause Controller has the incorrect sensor type selected, or has not correctly cold started. Resolution If none of the sensors display the correct temperature, then reloading the controller defaults, is the way forward. To reload the controller defaults and to re-initialise the controller, carry out the following; Switch off the power to the controller. Press and hold in the controller enter key. Switch on the power to the controller, whilst continuing to hold the enter key in. Release the enter key after 3-4 seconds. The sensor temperatures will now be displayed correctly. To access the controller data sheet, please click HERE.

Issue The V321 globe valve is described as a "Mixing valve", but  a diverting application is required. Environment Valves Actuators Diverting application. V321 VTRE Cause The incorrect positioning of the V321 globe valve in the flow pipe work will lead to water hammer. Water hammer can lead to bad vibration and potential damage to the valve and pipe work. Resolution The V321 is a globe valve, and this style of valve must be fitted so that the water flows proportionally across the valve seats. This is achieved when the valve is fitted into the system return pipe work. In the above drawing, it can be seen that the valve is fitted in the system return with its common port (AB) connected directly to the main system. Port A of the valve is connected to the heat load, and port B of the valve is connected to the bypass connection. This means that water will flow through ports A - AB if the valve is open, of ports B - AB if the valve is closed. I must fit my valve in the system flow, what can I do? If the valve must be located in the system flow, then this valve type is not suitable, and a different valve must be chosen. The most logical choice of valve suitable for location in either the flow or return is the VTRE It must be noted that this valve only has a rating of PN6 as opposed to the V321 which is rated PN16. For the VTRE data sheet please click HERE. Suitable actuators for the VTRE are either the M9B or EM9. For the data sheet for the 24 volt / 230 volt M9B click HERE. For the data sheet for the 0-10v DC EM9 click HERE.

Issue Drayton Theta Autotherm Controller requires replacement. Environment Stand alone discreet Drayton Theta Autotherm Controller applications. Cause Obsolescence of Drayton Theta Autotherm Controller. Resolution A.  Controller - Overview The Drayton Theta Autotherm Controller was manufactured primarily for use in domestic heating applications. The Drayton Theta Autotherm Controller combined the following functions in a single stand alone discreet Controller :- Heating System Compensator HWS Programmer.  There is no simple like for like replacement currently available but the two functions may be replicated as shown below. B.  Controller - Replacement 1.  Suggested replacements for Autotherm Heating System Compensator function and associated Sensors :-  Compensator Controller = CSC5252 or CSC5352, details of which may be viewed here. (The CSC5352 may be programmed to provide automatic Night Set Back) Outside Air Temperature Sensor = STO600, details of which may be viewed here. Clamp-On Temperature Sensor = STC600, details of which may be viewed here. (Use of a Clamp-On Temperature Sensor eliminates the need for any pipework modifications) N.B. The existing Drayton Theta Autotherm Heating System Actuator and Valve Body may be retained should these both be in working order. Alternatively, suggested replacements for the Drayton Theta Autotherm Heating System Actuator and Valve Body are :- Actuator = MD10B-24 or MD10B-230, details of which may be viewed here. Linkage Kit = LMD/AR-MB (914-1071-000), details of which may be viewed here. Valve Body = MB (select size from ½” to 2” size), details of which may be viewed here. 2.  Suggested replacement for Drayton Theta Autotherm HWS (Hot Water Service) Programmer function :- We do not offer an independent Programmer but such a product should be available from the Distributor supplying the S-E Satchwell CSC Compensator Controller and associated Temperature Sensors.  N.B. Any existing Relays that are currently installed may also be retained, in order to complete the replication of the Drayton Theta Autotherm control scheme.

Issue MD5B, MD10B, MD20B and MD40B Increase / Decrease Actuator is required to be controlled by means of ON/OFF CONTACT ( S.P.S.T.) Control Device instead of CHANGEOVER CONTACT ( S.P.D.T.) Control Device. Environment MD5B Increase / Decrease Actuator installed on a Damper and wired to a ON/OFF CONTACT ( S.P.S.T.) Control Device. MD10B Increase / Decrease Actuator installed on a Damper or Valve Body and wired to a ON/OFF CONTACT ( S.P.S.T.) Control Device. MD20B Increase / Decrease Actuator installed on a Damper or Valve Body and wired to a ON/OFF CONTACT ( S.P.S.T.) Control Device. MD40B Increase / Decrease Actuator in stalled on a Damper and wired to a ON/OFF CONTACT ( S.P.S.T.) Control Device. Cause MD5B, MD10B, MD20B and MD40B Increase / Decrease Actuator is required to be controlled by means of ON/OFF CONTACT ( S.P.S.T.)Control Device instead of CHANGEOVER CONTACT ( S.P.D.T.) Control Device. Resolution Wire MD5B, as indicated in On/Off control wiring diagrams on Data Sheet shown here. Wire MD10B as indicated in On/Off control wiring diagrams on Data Sheet shown here. Wire MD20B as indicated in On/Off control wiring diagrams on Data Sheet shown here. Wire MD40B as indicated in On/Off control wiring diagram on Data Sheet shown here.

Issue To order the correct version of this controller. Environment IAC600 Controller, IAC 600 Controller, MER207 Chip Eaton Williams BT Controller. Cause Ordering the incorrect version of controller will not allow the Eaton Williams scheme to operate correctly. Resolution To order the MER207 version of the IAC600 controller use the IAC600-S specification. To download the Visisat 2.1 MER207 stencils, please click here. Copy the downloaded file to your computer and unzip the file. The files will be unzipped to a folder "Satchwell" with the mer files in the correct folder structure underneath.The files will unzipped to a folder "Satchwell" with the mer files in the correct folder structure underneath. 1        Copy the folder Satchwell including its sub folders. 2        To your computers C: drive. 3        This will put the required MER files in the correct places ready for use. Now you can choose the stencil in VisiSat, when you need it, by selecting "open Stencil" and navigating to "C:\Satchwell\Binary\VisiSat\EN\Visio\Specials Products.vss.