+ Varifan MST-1
Contents
1. Page 30 HIGH TEMPERATURE ALARM This function establishes the temperature difference above the main set point that the room can reach before a high temperature alarm is signalled When a high temperature alarm occurs an alarm contact is activated and the alarm LED lights on the MST 1 The high temperature alarm is adjusted in 0 5 degree increments from a minimum setting of O F 0 C to a maximum setting of 32 0 F 18 0 C Adjusting the high temperature alarm e rotate the Selector dial to position 12 e rapidly rotate the Adjustor dial back and forth to enter secondary function mode e rotate the Selector dial to position 11 e rotate the Adjustor dial counterclockwise to decrease the setting clockwise to increase it The high temperature alarm setting is displayed on the MST 1 APPENDIX TROUBLESHOOTING SYMPTOM CAUSE and REMEDY Lo is Temperature is below minimum 13 5 F continually or 10 0 C displayed Probe is disconnected or defective Hi is Temperature is above maximum continually 105 0 F or 41 C displayed Probe is short circuited Fan s or Verify whether the fan LED is on H heater not LED is on yet fan or heater is not operating operating verify wiring fan and fuse Refer Figure 5 for fuse location If fuse is blown replace with fuse of same type Display is Verify that the line voltage selector blank switch is properly set Verify that the 10 pin flat cable between the main2. Averaging optional Four temperature probes are required if temperature averaging is desired in larger rooms Place the probes in appropriate locations to best average the ambient temperature Refer to Figure 4 Page 12 CHAPTER 2 INSTALLATION 2 6 ALARM The MST 1 provides a normally open and normally closed dry contact for alarming low or high temperature conditions In addition this same contact can be used to signal a power failure This contact may be connected to an alarm system or directly to a siren and or auto dialer Make normally open or normally closed connections as indicated in Figure 3 Momentary power interruptions may trigger false alarms To avoid false alarming when the MST 1 is connected to an alarm system install a time delay relay between the MST 1 and the alarm system 2 7 POWERING UP Before powering up the MST 1 attach the faceplate to the casing of the MST 1 using the four screws previously removed Set Selector knob to position 12 Upon power up the unit will test its display by briefly lighting all the segments of its LED Make certain that all segments light Following the LED display test the unit displays the ambient temperature of the room If the temperature is not displayed refer to the Trouble Shooting section in the appendix of this document Page 13 MST 1 CAUTION Set this line voltage to correct value before attempting to operate the MST 1 L2 N
3. L1 Fig 1 Wiring diagram for One Fan 5 6 CAUTION Set this line voltage to correct value before attempting to operate the MST 1 L2 N Li Fig 2 Wiring diagram for One heating unit Page 14 CHAPTER 2 INSTALLATION Note for figures 1 and 2 A Power cut and protection devices in case of overload Alarm system Temperature probe Fig 3 Temperature Probe and Alarm Wiring Page 15 MST 1 Terminal It is recommended to solder the jonctions of the probes Fig 4 Temperature Averaging Probe Connection Alarm Network mode mode PROBE NC C NO LINE VOLTAGE SELECTOR Fig 5 Main Board Terminal Blocks Switches and Fuses Page 16 CHAPTER 3 USER S GUIDE CHAPTER 3 USER S GUIDE ADJUST The MST 1 front panel shown above features a LED status window and two control dials which are respectively used to select a function and adjust a setting LED STATUS WINDOW The LED status window features a 3 digit LED readout for the display of temperature in Fahrenheit or Celsius and programmable settings In addition the LED status window displays the operational status of Stage 1 via one LED shown above in LED win dow When illuminated the LED indicates that the stage is operating The second LED lights to indicate a low or high temperature alarm condition CONTROL DIALS T
4. must be greater than the limit Adjusting ramping e rotate the Selector dial to position 9 e rotate the Adjustor dial counterclockwise to decrease the ramping rate clockwise to increase it The ramping setting is displayed on the MST 1 NOTE When ramping is activated or enabled the main set point temperature cannot be manually adjusted Ramping automatically turns OFF when the minimum temperature limit is reached Example The main set point temperature is set to 70 F and ramping is adjusted to 0 05 F The following day the main set point temperature drops to 69 95 F followed by 69 90 F on the next Although the main set point real value decreases the display will be changed after 10 days The main set point will then be 69 5 F Page 22 CHAPTER 3 USER S GUIDE RECORD LOW TEMPERATURE This function displays the lowest recorded temperature since the last clear The record low temperature is rounded to the nearest 0 5 degree from a minimum display of 13 5 F 10 0 C to a maximum display of 105 0 F 41 0 C If a temperature lower than 13 5 F is recorded Lo is displayed Viewing the lowest temperature recorded e rotate the Selector dial to position 10 Clearing the low temperature value e quickly rotate the Adjustor dial counterclockwise then clockwise CLr will be briefly displayed on the MST 1 Page 23 MST 1 RECORD HIGH TEMPERATURE This function displays
5. the highest recorded 19 temperature since the last clear The record high temperature is rounded to the HI nearest 0 5 degree from a minimum display of 13 5 F 10 0 C to a maximum display of 105 0 F 41 0 C If a temperature higher than 105 0 F is recorded Hi is displayed Displaying the highest temperature recorded e rotate the Selector dial to position 11 Clearing the high temperature value e quickly rotate the Adjustor dial counterclockwise then clockwise CLr will be briefly displayed on the MST 1 Page 24 CHAPTER 3 USER S GUIDE AMBIENT ROOM TEMPERATURE DISPLAY This function displays the ambient room 12 temperature The Selector dial should normally be left in this position The ambient temperature is displayed to the nearest 0 5 degree from a minimum display of 13 5 F 10 0 C to a maximum display of 105 0 F 41 0 C If the temperature is lower than 41 0 F Lo is displayed If the temperature is higher than 105 0 F Hi is displayed Viewing the ambient temperature e rotate the Selector dial to position 12 The ambient temperature is displayed on the MST 1 Page 25 MST 1 HEATING OR COOLING MODE Select if the MST 1 operates in heating mode or cooling mode The stage 1 heating or cooling mode is adjusted by selecting HE or COO HEA on the display if you want to use the stage 1 in heating mode or COO on the display if you want to use HEAT COOL the stage 1 in
6. MST 1 USER S MANUAL MST 1 Although the manufacturer has made every effort to ensure the accuracy of the information contained herein this document is subject to change without notice due to ongoing product development WARNINGS AND PRECAUTIONS Equipment probe failure blown fuses and or tripped breakers may prove harmful to the contents of the building Therefore it is strongly recommended to install backup devices and alarm or warning devices Spare equipment should also be available at the owner s site Equipment manufactured by the manufacturer is protected against normal line surges High surges caused by thunder storms or power supply equipment may damage this equipment For added security against line voltage surges it is recommended that surge and noise suppression devices be installed at the electrical distribution panel Use of shielded cable for probes is recommended for protection against lightning These devices are available from most electrical supply distributors RECOMMENDATIONS The manufacturer recommends that all installation procedures described herein be performed by a qualified electrician or installation technician Further more the manufacturer recommends to test all the functions and equipment connected to the MST including the alarm system and backup devices after installation after change to the installation and twice a year Fuse verification and replacement as well as the proper setting of con
7. MST 1 is in place use a screwdriver to remove the four screws holding the faceplate to the housing 2 3 SWITCH SETTINGS The MST 1 is configured for a variety of options via two switches as follows 2 3 1 Line Voltage Selector Switch This switch is located on the surface of the main bottom board and adapts the control panel for 115 VAC or 230 VAC line voltage Refer to Figures 1 and 2 Page 10 CHAPTER 2 INSTALLATION 2 3 2 Software Settings Switch This switch is located at the rear of the control panel faceplate and adjusts the following options A OFF ON EE Fahrenheit Celsius MC 2 Settings locked Setting unlocked MMC 3 SC Timer override active Timer override non active EE 4 Not used Not used Switch 1 Selects between a Fahrenheit or Celsius display on the front panel Switch 2 Locks unlocks user settings All settings except for main set point record low and record high are locked while this switch is off Switch 3 Non active Timer operates normally Active Timer operates at 100 when temperature reaches 4 F 2 C above the main set point In this case the temperature will decrease faster to the main set point Heat inverse logic 2 4 CONNECTION PROCEDURE For the connection procedures which follow refer to Figures 1 and 2 2 4 1 Input power Use a screwdriver to remove cable knock outs for the installation of cabling to the MST 1 Do not ap
8. TION The manufacturer recommends that the installation instructions which follow be adhered to as closely as possible and all work be performed by a certified electrician Failure to do so may void the warranty 2 1 UNPACKING Unpack the MST 1 from its box and inspect contents for damage Should the contents appear to be damaged contact your local distributor for return material procedures The package should contain the following standard items e 1MST 1 control e 1 installed temperature probe model number 2004 1KLT e 2 cable fasteners or fuses e 1 Users manual The following optional items may be included e 3 additional temperature probes for temperature averaging e 1 special temperature probe model number 2001 1KHT Page 9 MST 1 2 2 MOUNTING To limit the unit s exposure to noxious gases install the unit in a hallway Make certain that the unit is mounted right side up with the cable entry holes facing down The MST 1 will operate in a temperature range of 32 F 120 F 0 C 50 C The enclosure is watertight it is not splash proof or immersion proof DO NOT WATER the control Cover the control carefully with plastic when you are cleaning the room It is prohibited to use overhead cables outside the building Mounting hardware is not shipped with the unit Mount the MST 1 to the wall using the mounting holes located on the flange of the control housing Once the
9. board and the faceplate board is connected Page 31 MST 1 SPECIFICATIONS DESCRIPTION VALUE INPUT POWER i e VAC 50 60 Hz STAGE 1 dry relay 10 A 115V 230V contact 1 2 HP 115V Fuse 10A 1 HP 230V Min Rating 10mA at 115V 20mA at 230V ALARM dry relay contact 2 A 30V AC DC Relay will not function properly if load is smaller than the minimum value Storage temperature 20 to 55 C 4 to 130 F Operation temperature 0 to 50 C 32 to 122 F Weight 1 kg 2 2 Ibs Dimension 97 X 163 X 145mm 3 80 X 6 40 X 5 70 Page 32 APPENDIX RECORD FORM CE AA 2nd Function Page 33 MST 1 Page 34 WARRANTY Limited Warranty The manufacturered equipment and supplied components have gone through rigorous inspection to assure optimal quality of product and reliability Individual controls are factory tested under load however the possibility of equipment failure and or malfunction may still exist For service contact your local retailer or supplier The warranty period shall be for two years from manufacturing date Proof of purchase is required for warranty validation In all cases the warranty shall apply only to defects in workmanship and specifically exclude any damage caused by over voltage short circuit misuse acts of vandalism fortuitous events acts of God flood fire hail lightning or any other natural disaster Any unauthorized work mo
10. cooling mode Adjusting the stage 1 heating or cooling mode e rotate the Selector dial to position 12 e rapidly rotate the Adjustor dial back and forth to enter secondary function mode e rotate the Selector dial to position 2 e rotate the Adjustor dial counterclockwise to set the stage in heating mode clockwise to to set it in cooling mode The heating or cooling mode is displayed on the MST 1 Page 26 CHAPTER 3 USER S GUIDE STAGE 1 DUTY CYCLE PERIOD 2nd oi Period The Stage 1 duty cycle period is adjusted in conjunction with the Stage 1 duty cycle timer primary function 3 The Stage 1 duty cycle period is the total time in ON OFF fan cycle The period is adjusted in 1 minute increments from a setting of 1 minute to a maximum setting of 10 minutes Adjusting the Stage 1 duty cycle period rotate the Selector dial to position 12 rapidly rotate the Adjustor dial back and forth to enter secondary function mode rotate the Selector dial to position 3 rotate the Adjustor dial counterclockwise to decrease the period clockwise to increase it The Stage 1 period setting is displayed on the MST 1 Page 27 MST 1 Page 28 MINIMUM RAMPING Minimum ramping is the lowest that the ramping function can adjust the main set point to This is a security feature The minimum ramping setting is adjusted in 0 5 degree increments from a minimum setting of 13 5 F 9 5 C to a maximum sett
11. dification or repair on this product automatically voids the warranty and disclaims the manufacturer from all responsibility The manufacturer assumes only those obligations set forth herein excluding all other warranties or obligations This warranty stipulates that in all cases the manufacturer shall be liable only for the supply of replacement parts or goods and shall not be liable for any personal injury damages loss of profits interrupted operations fine contravention of the law or damages to the production of the PURCHASER and the PURCHASER shall take up the defense and hold the manufacturer faultless regarding any legal or extra legal proceedings notice or claim by the customer or by a third party and regarding any legal and extra legal expenses and fees brought forward on by such damages MAV MST 1M Ver 1 01 June 4 2001
12. erature Display 25 SECONDARY FUNCTIONS Heating or cooling mode asssessesssrreerrrrrrssrerrnnerrennseenena 26 Duty cycle period 27 Minimum Ramping anna 28 Low Temperature Alarm 29 High Temperature Alarm 30 APPENDIX TIGUDIGSHOOUNG cios ra 31 ele ee 32 Record FORM nee ere me nr eee 33 Page 4 CHAPTER 1 INTRODUCTION CHAPTER 1 INTRODUCTION 1 GENERAL This document provides a description of the MST 1 control panel This document is organized as follows Introduction Installation User s Guide Appendix 1 1 DESCRIPTION Congratulations on the purchase of your MST 1 environmental control system The MST 1 product line provides you with full control over temperature air flow and heat resulting in a good air quality The MST product line offers these features Heating or cooling mode Hi Lo temperature indication Automatic temperature reduction ramping Computer compatible with RCM 40 The MST 1 provides microprocessor control over a single stage output This stage controls a single speed fan or a heater To cool the room when the temperature is higher than the main set point use the MST 1 in cooling mode Or to heat the room when the temperature is lower than the main set point use the control in heating mode In addition the first stage may be programmed to cycle on and off Page 5 MST 1 DESCRIPTION CONTINUED The MST 1 provides you wi
13. he center dial is the Selector dial and is used to select one of the control panel s 7 primary or 5 secondary functions The dial located to the right of the Selector dial is the Adjustor dial and is used to enter secondary function mode and to adjust the setting of each function Page 17 MST 1 The 7 primary functions are e 1 Main set point temperature e 2 Stage 1 differential temperature e 3 Stage 1 duty cycle e 9 Ramping e 10 Record low temperature display e 11 Record high temperature display e 12 Ambient temperature display Any one of these functions is selected by rotating the Selector dial to the corresponding number and associated graphical image printed on the faceplate of the panel When primary functions 1 through 3 and 9 through 11 are selected the LED status window displays a blinking value Function 12 displays ambient temperature The 5 secondary functions are 2 Stage 1 Heating or cooling mode 3 Duty cycle period 9 Ramping minimum temperature limit 10 Low temperature alarm 11 High temperature alarm Select any one of these secondary mode functions by e rotating the Selector dial to 12 e rapidly rotating the Adjustor dial back and forth to enter secondary mode e rotating the Selector dial from function 12 to any other function When secondary functions 2 and 3 and 9 through 11 are selected the status window displays a blinking value along with a scrolling LED display Selection of funct
14. ing of 105 0 F 41 0 C Adjusting the minimum ramping setting e rotate the Selector dial to position 12 e rapidly rotate the Adjustor dial back and forth to enter secondary function mode e rotate the Selector dial to position 9 e rotate the Adjustor dial counterclockwise to decrease the minimum ramping setting clockwise to increase it The minimum ramping setting is displayed on the MST 1 NOTE When the main set point temperature reaches the minimum ramping limit the ramping setting primary function 9 automatically shuts off CHAPTER 3 USER S GUIDE LOW TEMPERATURE ALARM This function establishes the temperature 2nd difference below the main set point that the room can reach before a low temperature alarm rs is signalled When a low temperature alarm occurs an alarm contact is activated and the alarm LED lights on the MST 1 Alarm The low temperature alarm is adjusted in 0 5 degree increments from a minimum setting of 32 0 F 18 0 C to a maximum setting of 0 0 F 0 0 C Adjusting the low temperature alarm setting e rotate the Selector dial to position 12 e rapidly rotate the Adjustor dial back and forth to enter secondary function mode e rotate the Selector dial to position 10 e rotate the Adjustor dial counterclockwise to decrease the setting clockwise to increase it The low temperature alarm setting is displayed on the MST 1 Page 29 MST 1 2nd Alarm
15. ion 12 removes the MST 1 from the secondary function mode Page 18 CHAPTER 3 USER S GUIDE PRIMARY FUNCTIONS MAIN SET POINT The main set point establishes the target temperature in the building This value is used as the reference point for other settings The main set point temperature is adjusted in 0 5 degree increments from a minimum setting of 13 5 F 9 5 C to a maximum setting of 105 0 F 41 0 C Adjusting the main set point temperature e rotate the Selector dial to position 1 e rotate the Adjustor dial counterclockwise to decrease the temperature setting clockwise to increase it The main set point temperature is displayed on the MST 1 Note The ramping feature primary function 9 must be OFF to adjust the main set point Page 19 MST 1 DIFF Page 20 STAGE 1 DIFFERENTIAL In order to minimize erratic behavior of Heater Fan 1 when ambient room temperature is exactly at the relative set point the differential setting separates this ON OFF threshold into two one ON threshold and one OFF This feature greatly reduces equipment wear The temperature difference between the two thresholds is the differential The differential is adjusted in 0 5 degree increments from a minimum setting of 0 5 F 0 5 C to a maximum setting of 10 F 5 C degrees Adjusting the differential setting e rotate the Selector dial to position 2 e rotate the Adjustor dial counterclockwise
16. ply power to the MST 1 until all connections have been completed 2 4 1 1 115 VAC Make certain that the line voltage selector switch is set to 115 VAC Connect the power cable to terminals 3 and 4 on the main bottom board Page 11 MST 1 2 4 1 2 230 VAC Make certain that the line voltage selector switch is set to 230 VAC Connect the power cable to terminals 3 and 4 on the main bottom board 2 4 2 Stage 1 terminals 5 and 6 Connect the two leads from Stage 1 to terminals 5 and 6 on the main bottom board 2 5 TEMPERATURE PROBES Temperature probes use a Class 2 low voltage circuit These cables 18AWG can extend up to a distance of 500 feet 150 meters For probe longer than 10 feet 3 meters install shielded wire 18AWG min With the shield grounded to ground of power source Single probe connections Single temperature probe connections are illustrated in Figure 3 while temperature averaging connections are illustrated in Figure 4 Use shielded cabling for probes when their cable paths run parallel to high voltage wires Connect the shields to the ground of power source Failure to do so may result in inaccurate readings 2 5 1 Single Temperature Probe Install a single temperature probe in an area that best reflects the overall temperature of the room Connect the two leads and the shield of the temperature probe to the MST 1 terminals labelled Probe as indicated in Figure 3 2 5 2
17. th full control over one stage via the use of an easy to follow display panel All programmable features can be customized to meet your requirements The MST 1 keeps you constantly informed by displaying the status of all of its outputs as well as the ambient temperature Air quality is ensured by the continuous control of climate and timely alarm notification should environmental conditions exceed alarm set points Further security may be obtained by connecting all MST series controls in a network configuration to a computer via the use of an optional RCM 40 remote monitoring unit This provides remote control monitoring of each room The control panel output is fused and all programmable settings are maintained whether or not the MST 1 is powered The MST 1 provides an automatic constant temperature reduction ramping feature for your maturing livestock A built in low temperature safety factor prevents temperatures reaching dangerous limits With MST 1 in control of your climate you are assured of good air quality Page 6 CHAPTER 1 INTRODUCTION MAIN SET POINT The desired room temperature Other temperature settings on the MST 1 are relative to the main set point temperature AMBIENT TEMPERATURE The actual temperature of the room RAMPING An automatic daily reduction in the main set point and all temperature settings relative to this Page 7 MST 1 Page 8 CHAPTER 2 INSTALLATION CHAPTER 2 INSTALLA
18. to decrease the differential setting clockwise to increase it The differential setting is displayed on the MST 1 CHAPTER 3 USER S GUIDE STAGE 1 DUTY CYCLE As long as the actual temperature is below the 3 main set point the timer unit will not operate When the ambient temperature rises above the main set point the stage 1 begins to operate in y a duty cycle mode The duty cycle sets the percentage of time the stage 1 unit is ON versus the percentage of time the unit is OFF TIMER i S The Stage 1 duty cycle is adjusted in 5 increments from a minimum setting of 5 up to a maximum setting of 100 corresponding to continuous operation Adjusting the duty cycle setting e rotate the Selector dial to position 3 e rotate the Adjustor dial counterclockwise to decrease the duty cycle setting clockwise to increase it The duty cycle setting is displayed on the MST 1 Example The period of Stage 1 is set to 8 min utes by secondary function 3 while the duty cycle is set to 75 When the temperature reaches the main set point the stage 1 begins to operates for 6 minutes and shuts OFF for 2 minutes Page 21 MST 1 RAMPING The ramping function automatically reduces the main set point by the set amount every 24 hours The ramping setting is adjusted in 0 01 degree decrements from a minimum setting of OFF 0 01 F 0 01 C to a maximum setting of 0 99 F 0 50 C The main set point
19. trol values shall be the responsibility of the owner of this equipment Page 2 TABLE OF CONTENTS CHAPTER 1 INTRODUCTION 1 General ruina it ented N al 5 1 1 Description sien ee tin la rata a Bt te a vb aia 5 D finition of tefms 2 cc a tt ca ca a ade ee a nt dai 7 CHAPTER 2 INSTALLATION 2 4 2 2 5 2 5 1 2 5 2 2 6 2 7 npacKing eege EE nur aa a ata 9 MOUNTING cc ea oi ai a cn e ao e A ad le ca la E 10 Switch SONO aia idas 10 Line Voltage Selector Switch 10 Software Settings Switch A 11 Connection Procedure nnee neam nnaaee 11 Input Power aaa ca ee aa 11 ITS VACA ans a ee ca dota d a een TL nn see e cdo ae do 11 230 VAG sion ete een ata Ducati a atatia Dar 12 Stage Ticks i initia A 12 Temperature Probes essssoesessesrrenneensteertertrrnnrnnnerenee es 12 Single Temperature Probe 12 AVGIAGING ciutat taie mate 12 ALGE OTE nn AI en Oua e nt st tates 13 Powering Up ant aid 13 CHAPTER 3 USER S GUIDE LED Status Window 17 ControliDialS 03h faite aa aaa e dd 17 PRIMARY FUNCTIONS Main Set Point Temperature ooocccccccccncnncononccnncnnnnnnnininnnnns 19 Stage 1 Differential 20 Stage 1 Duty Cycle timer 21 Page 3 MST 1 CONTENTS CONTINUED E Tue in Te DEE 22 Record Low Temperature eeeceeeeeeeceeeeeeeeeeeeeeeteees 23 Record High Temperature men eee 24 Ambient Room Temp
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