Installation Manual
Contents
1. Fan Purge 5 Min 4 Fan Purge 10 Min 5 Heat Only Fan Purge 1 Min 6 Heat Only Fan Purge 3 Min 7 Heat Only Fan Purge 5 Min 8 Heat Only Fan Purge 10 Min 9 Cool Only Fan Purge 1 Min 10 Cool Only Fan Purge 3 Min 11 Cool Only Fan Purge 5 Min 12 Cool Only Fan Purge 10 Min 19 Read Write 0 10V Heat Span 0 5 C to 10 C in 0 5 C Steps 1 F to 20 F in 1 F Steps Value 10 e g Heat Span of 1 C 10 20 Read Write 0 10V Cool Span 0 5 C to 10 C in 0 5 C Steps 1 F to 20 F in 1 F Steps Value 10 e g Cool Span of 1 C 10 21 Read Write Auto Off Timer 0 Off 1 to 10 Hours 0 5 hour steps Value 10 e g 3 Hour Auto Off Timer 30 22 Read Write Unoccupied Heat Set Point 0 Off 5 C to 30 C in 1 0 C Steps 41 F to 86 F in 1 F Steps 23 Read write Unoccupied Cool Set Point 0 Off 5 C to 30 C in 1 0 C Steps 41 F to 86 F in 1 F Steps 24 Read Write Unoccupied Fan Mode 3 Fan Speed Mode 1 Low Fan Auto 2 Med Fan Auto 3 High Fan Auto 4 Low Fan On 5 Med Fan On 6 High Fan On 1 Fan Speed Mode 0 Fan Auto 4 Fan On 25 Read Write Backlight 0 On with Button Press only 1 Always On High 2 Always On Low High With Button Press 26 Read Write Remote SI amp Com 0 V Temperature Input Function 0 Replace On Board Sensor with Remot2. A1 Cool This output is used to control a cooling valve T pical 24V Heat Valve A2 Heat This output is used to control a heating valve A3 Fan This output is used to control a variable speed fan or a variable capacity AC system If the fan mode is set to Auto speed the 0 10V output will Power Supply vary between these two values based on calculated demand If the user selects LOW speed the 0 10V output will be fixed at 3 3VDC when Medium speed is selected the 0 10V output will be fixed at 6 6VDC High speed is set to 1OVDC The installer menu provides the following settings for the control of the three 0 10V outputs Span This is the value where the output is at maximum value It sets how aggressive the 0 10V will move for a given temperature change Range is 0 5C Time Interval Time interval sets the running average calculation time The smaller the number the faster the 0 10V output will respond to room temperature changes Range is 10 300 seconds Direction Forward action OV 0 open and 10V 100 open reverse action sets OV 100 open and 10V 0 open Minimum Value Rather than start the output at OV when the output is called it will immediately jump to this value It will then vary the output to maximum When approaching set point the value will drop from the Page 7 minimum value to Ov in 1 step This setting is particularly useful for fan control as it will not permit t
3. un occupied mode it will continue to use the PIR input to determine room occupancy For example a couple may be staying in the room and one leaves the room leaving the other asleep in bed As the door closes the SMT 131 will seek movement and when none is found it will enter un occupied mode As the sleeper wakes and then moves the SMT 131 will automatically re enter Occupied Mode even though it may have been some time since the door was closed Installer option PIR Input Delay page 16 sets the PIR mode On or Off and the seek time value 1 to 15 minutes Using the SMT 131 in automatic occupancy Mode School Room Mode Wiring a PIR directly to the door switch input of the SMT 131 permits you to use the 131 to automatically turn the Air conditioning on when a person enters the space if seen by the movement detector and automatically turn if off again after a set period of time after they leave the space Such as may be useful in training rooms that are rarely occupied Steps to use the SMT 131 in automatic occupancy detection mode 1 Wire the PIR movement detector into the DOOR SWITCH input 2 Set the PIR input delay period to the number of minutes that you wish the Airconditioning to run after the last movement has detected in the space 3 Place a link permanently shorting the PIR input Page 11 Manual Occupancy Input The DI Digital Input amp Com 0 10 terminals within the SMT 131 can be used to instantly fo
4. 0F 20 F 1F steps speed relays Data format Fan span 10 49 Read Write 0 10 Fan Interval 10 300 seconds in 10 second steps 60 seconds default 50 Read Write 0 10 Fan Direction 0 10V is 100 open forward acting 1 OV is 100 open reverse acting 51 Read Write 0 10 Fan Minimum 0 10v Fan value x 10 Voltage 52 Read Write 0 10 Heat Interval 10 300 seconds in 10 second steps 60 seconds default 53 Read Write 0 10 Heat Direction 0 10V is 100 open forward acting 1 OV is 100 open n reverse acting Page 21 54 Read Write 0 10 Heat 0 10v Heat value x 10 Minimum Voltage 55 Read Write 0 10 Cool Interval 10 300 seconds in 10 second steps 60 seconds default 56 Read Write 0 10 Cool Direction 0 10V is 100 open forward acting 1 OV is 100 open n reverse acting 57 Read Write 0 10 Cool Minimum 0 10v Cool value x 10 Voltage 58 Read Write Window input logic 0 Normally Open 1 Normally closed 2 Off input disabled 3 Shows FLT FAULT shown on LCD alternating with temperature dispay 59 Read Write Window input 0 300 seconds in 30 second steps Delay 60 Read Write Door input logic 0 Off 1 Normally Open 2 Normally closed 61 Read Write Door input Delay 0 300 seconds in 30 second steps 62 Read Write PIR input Delay 0 Off Seek Time 1 60 minutes in 1 minute steps 63 Read Write Unit run time log 0 9999 9
5. relay The mode must be Heat Cool Sw2 OFF The 3 x 0 10V 40040 Heat 41 Cool amp 68 Fan outputs can be controlled by Modbus at any time without restriction To permit Modbus to control the output first enter 1000 in the register you wish to override it is then unlocked from SMT 131 control and you are then permitted to enter the value you wish the selected output to be such as O relay OFF and 1 1 relay ON or 63 should you wish the 0 10v to output 6 3v To return the output to SMT 131 control simply enter 1001 into the register Please Note Writing to the relays or 0 10V output via Modbus bypasses the SMT 131 internal memory protection logic Changing these values regularly via Modbus may reduce the thermostats memory life to only a few years Using this function will void the SMT 131 warranty for the memory chip within the thermostat 35 Read Only W relay status 0 Off under thermostat control Read Write 1 Energised under thermostat control 3 09 1000 Held OFF by Modbus 1001 Held ON by Modbus 36 Read Only Y Relay Status 0 Off under thermostat control Read Write 1 Energised under thermostat control 3 09 1000 Held OFF by Modbus 1001 Held ON by Modbus Page 20 37 Read Only High Fan Relay 0 Off under thermostat control Read Write Status 1 Energised under thermostat control 3 09 1000 Held OFF by Modbus 1001 Held ON by Modbus 38 Read
6. 0 10V slow to fast 1 10 to OV slow to fast 12 0 10V Fan minimum value 0 10V minimum fan voltage Data format 0 10V Fan minimum value 10 when running 13 0 10V Fan Maximum value 0 10V Maximum fan voltage Data format 0 10V Fan minimum value 10 when running 14 Heat span 0 5C 3 0C 1 0F 6 0F 0 1C 0 1F steps Data format Fan span 10 15 0 10V Heat interval PI 10 300 seconds 10 seconds steps 60 seconds default 16 0 10V Heat direction 0 10V is 100 open forward acting 1 OV is 100 open n reverse acting 17 0 10V Heat minimum 0 10V Voltage Data format 0 10V Heat minimum value 10 18 Cool span 0 5C 3 0C 1 0F 6 0F 0 1C 0 1F steps Data format Fan span 10 19 0 10V Cool interval PI 10 300 seconds 10 seconds steps 60 seconds default 20 0 10V Cool direction 0 10V is 100 open forward acting 1 OV is 100 open n reverse acting 21 0 10V Cool minimum 0 10V Voltage Data format 0 10V Cool minimum value 10 22 Auto Off Timer 0 No auto off timer 1 10hours 0 5 hour increments Data format hour 10 23 Un occupied heat 0 OFF Set point 5C 30C 41F 86F 0 5C 1F steps 24 Un occupied cool 0 OFF Set point 5C 30C 41F 86F 0 5C 1F steps Page 15 25 Un Occupied fan mode Fan 3 Speed mode 1 Low Auto default 2 Med Auto 3 High Auto 4 Low ON 5 Med ON 6 High ON 26 Backlight 0 On with button press Only Def
7. 200 in most cases Page 12 Modbus and other communication protocol rely on the quality of cable and good installation practises to ensure reliable communications Modbus requires the use of screen cable with the drain grounded in a single location When using a common power supply or when using a modbus master that also powers the SMT 131 ensure the R 24v active C 24v common Data A amp B wires are not crossed Hint When the SMT 131 is connected to a working Modbus Network and receiving valid data the decimal point in the temperature display will blink If there is no communication or the SMT 131 is receiving corrupted data this decimal point will remain on steady The Modbus data is provided in Addendum 1 at the back of this manual page 17 To Additional Thermostats Modbus relies on a series connection and will normally not tolerate Star wiring or T branches SMT 131 SMT 131 Remote Temperature sensors Occasionally the room thermostat cannot be installed in the ideal location to measure the room temperature accurately In these circumstances the SMT 131 can use optional remote temperature sensors These are a two wire device not polarity dependent and simply wired into the SMT 131 sensor p X RS 2 inputs terminals SI and Com 0 V Depending on Sensor installer menu sensor settings shown on page 16 remote sensor s will either override the SMT 131 onboard sensor or average w
8. If the mode button is hidden the service and maintenance staff can turn the SMT 131 on or off by pressing and holding the lower left of the LCD for 15 seconds 2 chirps indicates the SMT 131 has turned ON 1 chirp indicates the SMT 131 has turned off ver 3 03 1 Permitted Modes 0 Off Auto 1 Off Auto Heat Cool 2 Off Heat Cool 3 Off Heat 4 Off Cool 5 Off Auto Display current heating or cooling mode 2 Room Set display 0 Show room and set temp default 1 Show set temp only Native display format 0 C default 1 F C F button shown on LCD 0 Off default 1 On High temp set limit 5C 30C 41F 86F Low temp set limit 5C 30C 41F 86F ND U BR w Dead band OC 5 0C OF 10 0F 0 1C 0 1F steps Data format Dead band 10 Page 14 8 Fan Purge Period 0 OFF 1 Fan purge 1 min 2 Fan purge 3 min 3 Fan purge 5 min 4 Fan purge 10 min 5 Heat only fan purge 1 min 6 Heat only fan purge 3 min 7 Heat only fan purge 5 min 8 Heat only fan purge 10 min 9 Cool only fan purge 1 min 10 Cool only fan purge 3 min 11 Cool only fan purge 5 min 12 Cool only fan purge 10 min 9 Fan span 3 speed relays 0 5C 3 0C 1 0F 6 0F 0 1C 0 1F steps Data format Fan span 10 10 0 10V Fan Interval PI 10 300 seconds 10 seconds steps 60 seconds default 11 0 10V Fan direction 0
9. Neutral i SW7 Fan Vent Customer Preference 0 10 Cool Valve t SW8 Door Station Customer Preference 0 10 Heat Valve 0 10 Valve Common Page 6 Note When the SMT 131 calls heating or cooling the SMT 131 will drive both the relays and the 0 10V outputs simultaneously This way the SMT 131 can call a circulating water pump via the relays as it controls room temperature with valves if needed 0 10v Outputs To permit the control of modulating heating and cooling valves as well as variable speed DC fan motors or variable capacity HVAC systems the SMT 131 has been fitted with 3 x 0 10V outputs The 0 10V outputs in the SMT 131 are PI Proportional Integral controlled This control method provides the most accurate and cost effective way to control heating and cooling valves by ensuring set temperate are reached as quickly and efficiently as possible while reducing temperature overshoot As the SMT 131 is fitted with both relays as well as 0 10V outputs to control HVAC systems there may be some slight disparity between the thermostat display and the 0 10V outputs actions The SMT 131 displays the relay actions more than the actions of the 0 10V outputs on the LCD In most cases these are very closely matched however as the 0 10v outputs have the capability of providing finer control than do the ON OFF relays the heating and cooling calls may have started slightly before indicated on the thermostat display This is true of the fan also
10. Only Medium Fan Relay 0 Off under thermostat control Read Write Status 1 Energised under thermostat control 3 09 1000 Held OFF by Modbus 1001 Held ON by Modbus 39 Read Only Low Fan Relay 0 Off under thermostat control Read Write Status 1 Energised under thermostat control 3 09 1000 Held OFF by Modbus 1001 Held ON by Modbus 40 Read Only 0 10V Heat Value Value 10 e g 7 3V 73 Read Write To write add 10 e g to write 7 3v send 1073 3 09 41 Read Only 0 10V Cool Value Value 10 e g 2 1V 21 Read Write To write add 10 e g to write2 1v send 1021 3 09 42 Read Only Permitted Modes 0 Auto Heating and cooling called ver 2 1 only 1 Heat Only Mode 2 Cool Only Mode Values below only apply to version 2 hardware only Firmware version 3 43 Read Write 2 pipe mode 0 Heat changeover 1 Cool 44 Read Write Thermostat 0 Deg C Displaying 1 Deg F 45 Read Write Buttons shown on 0 Both mode and fan buttons show default display 1 Show mode but hide fan button 2 Show fan but hide mode button 3 Hide both mode and fan buttons 46 Read Write Permitted Modes 0 Off Auto 1 Off Heat Cool Auto 2 Off Heat Cool 3 Off Heat 4 Off Cool 5 Off Auto display current mode in LCD 47 Read Write Swap C F display 0 C F Button hidden shown on display 1 C F button shown 48 Read Write Fan Span for 3 0 5C 10 C 0 5C step 1
11. Ort Za SMT 131 Manual 1 11 15 Revision History Version 1 Original Document Version 1 1 Added Mode select in Modbus Version 2 0 Based on version 2 Hardware firmware 3 0 Version 2 1 Added temperature calibration DI logic and High fan limit Version 2 2 Added default daily start temperature firmware 3 03 Version 2 3 Corrected manual for register 40022 amp 40023 Added service O ride on off Version 2 4 Added enhancements found in version 3 3 Firmware Index 2 Introduction 3 Thermostat operation 3 Installation HVAC Control 4 DIP Switch Settings 5 Wiring HVAC Control 5 Terminal Designations 5 0 10v Outputs 7 Belimo 6 Way Valve 8 2 Pipe Mode 8 Ancillary Functions 9 Occupancy Detection 9 Fault Indication 10 Doorbell 12 Outside Door Station 12 Automatic Day Set Temperature 12 Modbus Wiring 12 Remote Temperature sensors 13 Installer Options Menu 14 Modbus Data Addendum 1 17 Specifications 23 Page 2 Introduction The Smart Temp SMT 131 thermostat has been designed for use in hotel rooms guest accommodation and locations where the user will require a thermostat that is simple to understand and that functions in a logical manner Further given the nature of the hospitality industry in general it is important that the thermostat be robust flexible in function and attractive The SMT 131 thermostat has been designed with these important goals is mind The SMT 131 also offers advanced energy cons
12. ault gt ver 3 1 1 Always On high 2 Low when standby high when active Default lt ver 3 1 27 TT sensor SI amp Com 0 Remote Use this sensor in place of the fitted sensor 1 Average Use both remote and fitted sensor and control to the average temperature of both sensors 2 Data Sensor value used for Modbus only 3 Duct Used for 2 pipe mode 28 Temperature Calibration 10 deg C or F Adjust to show correct room temp 29 Digital Input 0 Force Room to Unoccupied Mode 1 Chime Door Bell 30 Digital Input Logic 0 Normally Open 1 Normally Closed 31 Window Input Logic 0 Normally Open 1 Normally closed 2 OFF Input function disabled 3 Ver 3 3 Show FLt Fault on LCD Toggles between temperature display and FLt 32 Window Input Delay 0 300 seconds 30 seconds steps 30 seconds default 33 Door Input Logic 0 Off default 1 Normally open 2 Normally close 34 Door Input Delay 0 300 seconds 30 seconds steps 180 seconds default 35 PIR Input Delay 0 Off default 1 15 minutes 1 minute steps ver 3 3 changed 0 60min 36 Reset Fan 0 Off 1 On resets indoor fan to auto every time mode is set to off 37 Belimo Mode 0 Off 1 On 38 Modbus Address 1 255 39 Baud rate 1 4800bps 2 9600bps default 3 19200bps 40 Default Start Temp O OFF default 15 35C or 59 86F Version 3 3 41 Beeper 0 Off Version 3 9 1 On default 42 Factory Reset 0 NO 1 Yes Exit t
13. e 1 Average On board Sensor with Remote 2 Modbus Use Only e g Coil Temp Monitor 3 2 pipe monitor 27 Read Write Digital Input Function 0 Occupancy Initiate 1 Chime Door Bell 2 Input Disabled Ver 3 09 28 Read Write Reset Fan Mode 0 Leave fan mode unchanged 1 Reset fan to Auto at switch off Page 19 29 Read Write Belimo Mode 0 Standard 0 10V Valve Logic 1 Belimo 6V Off 3 Way Valve Logic 30 Read Write Modbus Address 1to 255 31 Read Write Baud Rate 1 4 8Kbs 2 9 6kbs 3 19 2Kbs 32 Read Only Digital Input Status 0 Open 1 Closed 33 Read Only Internal Sensor Value 10 e g 23 3 C 233 Value 34 Read Only Remote Sensor Value 10 e g 21 8 C 218 Value Version 3 09 firmware provides the ability for Modbus to override all the SMT 131 outputs 5 x relays amp 3 x 0 10v Note To protect equipment functions the following rules apply To override register 35 W relay The anticycle timer must be OFF SW 5 Off To override register 36 Y relay The mode must be Heat Cool Sw2 OFF and the anticycle timer must be OFF SW 5 Off To override register 37 High fan relay Single fan speed Sw1 OFF must be selected and the mode must be Heat Cool Sw2 OFF To override register 38 Med fan relay Single fan speed Sw1 OFF must be selected and the mode must be Heat Cool Sw2 OFF To override register 39 Low fan
14. eed Mode 0 Fan Auto 4 Fan On 9 Read Write User Set Point Deg C 0 5 C Steps Deg F 1 F Steps Value 10 e g 23 5 C 235 10 Read Write Contact Reception Notification 0 Off 1 Show Contact Reception on LCD SMT 131 LCD will flash Contact Reception on LCD and sound chime User may accept alert by touching any button on SMT 131 11 Read Write Room Temperature Value 10 e g 21 7c 217 Writing to the room temp register to calibrate this value 12 Read Write Temperature Display 0 Show Room and Set Temperature 1 Show Set Temperature Only 13 Read Write Native C F Display 0 Deg C format 1 Deg F format 14 Read Write User Set Point High 5 C to 30 C Range 41 F 86 F in 1 C F Steps Limit 1 1 15 Read Write User Set Point Low 5 C to 30 C Range 41 f 86 F in 1 C F Steps Limit 1 1 16 Read Write Dead Band 0 5 C to 5 0 C in 0 5 C Steps 1 0 F to 10 0 F in 1 F Steps Value 10 e g 1 5 C Dead Band 15 17 Read Write Relay Span 0 5 C to 3 0 C in 0 5 C Steps 1 F to 10 F in 1 F Steps Value 10 e g 1 0 C Span 10 Version 3 code has this function Inactive Modbus will return valid data however this function is internally disabled Register provided for backwards compatibility only Page 18 18 Read Write Fan Purge Period 0 Off 1 Fan Purge 1 Min 2 Fan Purge 3 Min 3
15. ent can be limited with the installer setting heat and cool limit setting See page 14 Fan Single fan speed mode Sw1 Off See Dip switch settings page 5 Tap the fan button to cycle between auto fan and continuous fan mode Three fan speed mode Sw1 On See Dip switch settings page 5 Tap the fan button to cycle between low medium high and auto fan speeds Press and hold the fan button to turn the fan on continuously Page 3 Note Option 16 in the installer menu See page 15 permits you to set the SMT 131 to automatically reset the indoor fan to Automatic Mode cycle on and off with heating and cooling every time the thermostat is turned off and then back on if desired If Auto Fan mode is selected then when the heating and cooling stops so will the fan after any purge periods have expired if set see page 15 If Fan On mode is selected then the fan will continue to run after the heating and cooling stops to maintain ventilation Ventilation Mode If permitted by DIP Sw7 See page 5 the user can run the indoor fan only Ventilation Mode when the SMT 131 is off by tapping the fan button Each tap of the fan button will cycle between all available fan speeds Make up Room amp Do Not Disturb Buttons When enabled by DIP Sw8 See page 5 pressing these buttons will activate relevant LCD segments and backlight colour on the optional outside door station as well as write data to Modbus for monitorin
16. ervation features such as set point limit control automatic un occupied heating and cooling settings as well as Modbus RTU communications for integration with the Building Automation System BAS or Hotel Check In system Additionally the SMT 131 seamlessly interfaces with the Smart Temp OC 3D occupancy detection system and HOT 242 Door Station system for added functionality Thermostat operation The SMT 131 is an extremely simple Make up Room Do Not Disturb thermostat to operate and has been designed to not require a user manual e Ron t ten desired temperature glee pelle The diagram to the left shows all LCD elements and the 7 buttons Up Down p E 1 7 8 Ee q GD LJ Make Up Room Do Not Disturb On Off Set point tf limit mode Fan Mode Deg C F Select GD GB reached v Contact Reception winne Depending on switch and installer menu OFF ON AUTO 4 jy Fan ON ventilation settings not all LCD segments maybe shown HEAT coo OO hon Medium High Aute On Off Mode Tap the On Off button to turn the thermostat On or Off and If permitted to select heat only or cool only mode To ensure the simplest user operation on off only Mode is set as default Note for simplicity If the thermostat is OFF by simply touching the thermostat display will turn it on Set Temperature Adjust the target temperature with the Up or Down button The range of temperature adjustm
17. estart once the door is closed PIR input A PIR passive infra red movement detector can be directly wired to the SMT 131 PIR input As movement is detected by the PIR it will send multiple On Off pulses to the SMT 131 every time it detects movement The SMT 131 using this data along with door switch data will determine the occupancy status of the room and behave accordingly Note the PIR must be separately powered typically from a 12VDC supply Automatic Occupancy Detection Logic Automatic occupancy detection requires the door switch and PIR input to be wired and working When the door is first opened the SMT 131 instantly enters Occupied Mode where the SMT 131 will permit the guest to set their desired temperature and mode of operation Once the door is closed the SMT 131 will look for movement as detected by the PIR sensor wired to the PIR input If no movement is seen within the installer pre set seek time installer adjustable 1 to 15 minutes the SMT 131 will enter Un occupied mode where the guest s temperature and mode will be replaced with installer pre set values Should movement be detected within the installer pre set seek time the SMT 131 will LOCK into Occupied Mode and no longer rely on continued movement within the room to remain in Occupied Mode Next time the door is opened and then closed again the SMT 131 will again begin its occupancy detection process Note even when the SMT 131 is in
18. g by a BAS system Note you do not need the outside door stations to be fitted if you simply wish this data to be presented to Modbus Installation HVAC Control System Design Great effort has been taken to make the SMT 131 system intuitive reliable and easy to install Using a common sense approach to the installation will ensure this product is installed easily and to the customer s satisfaction Please read and understand this instruction manual so that installation testing and commissioning process is undertaken in an effective and efficient manner Opening Wall Controller Open the SMT 131 wall controller by placing a flat blade screwdriver or coin in the slot on the bottom of the thermostat case 1 and gently 1 twist 2 to release the case locking clip Gently pry the two case halves apart at the base taking care not to twist the case as this may crack the LCD Mounting wall Controller The SMT 131 should be mounted in a convenient location at approximately 1 2 to 1 5 meters from the ground It should be located in a typical location where it will sense the accurate room temperature and not be effected by direct sunlight or drafts It is highly recommended that any penetrations in the wall where wiring may pass for example be sealed to prevent drafts entering the rear of the thermostat and effecting the room temperature sensor Page 4 Take care to ensure excess wiring is not trapped between the cases half
19. he fan to run too slowly when close to set point Maximum Value Fan A3 output only When controlling 0 10V fans sometimes it is necessary to limit the fan speed to reduce noise or to protect ducting The fan output has a high voltage limit setting so regardless of the user selected speed High Medium or Low or thermostat selected auto speed the 0 10V output will not exceed this pre set high limit These settings can be found in the installer menu starting on page 15 Belimo 6 Way Valve Belimo manufactures an actuator that is in full cooling at 2V off at 6V and full heating at 10V To use this type of actuator with the Smart Temp SMT 131 you must enter the installer menu and set valve type to Belimo Mode The heating 0 10v output only is used in this mode Cool Span eat Span Information on the installer menu can be found on page 14 of this manual As with normal valves the 0 10V Set point heating and cooling span settings in 2v 4T 7 3v Ov the installer menu scale the heating and cooling outputs Factory default is full heating and full cooling 1 C from set point The heating and cooling span can be adjusted independently to a maximum of full heating and full cooling 3 C from set point The output is linear 0 30 30 60 60 90 Note When using Belimo mode both the A1 cool and the A2 Heat 0 10 output are used Both will provide the same output to the value The A3 fan output will re
20. hours 64 Register 63 amp 64 are to be used together to determine the total Heat amp Cool run time in 0 1 hours For example for a total run time of 15643 4 hours register 64 will show 434 and register 63 will show 156 65 Read Only Window Input 0 Open Status 1 Closed 66 Read Only Door Input Status 0 Open 1 Closed 67 Read Only PIR Status 0 No Movement detected 1 Movement detected 68 Read Only 0 10V Fan Value Value 10 e g 2 1V 21 Read Write To write add 10 e g to write2 1v send 1021 3 09 69 Read Only 0 10V Fan Max 0 10v 10 Value 70 Read Write Digital Input logic 0 Normally Open 1 Normally Closed 71 Read Write Default Start Temp 0 Off Ver 3 3 firmware 15 35c or 59 86F Page 22 Input Voltage Operating Temperature Operating RH Storage Temperature Size Display Size Backlight Display Type Relay Rating 0 10V Output Load Control Range Memory Type Communications Plastic Warranty 24VAC 50 60 Htz 15 0 C to 50 C 32 F to 122 F 0 95 Non Condensing 0 Cto 65 C 32 F to 150 F 113 x 103 x 25mm 69 5 x 46 3mm White LED Other Colours Available Upon Request STN Touch Panel 30V 1Amp Max 10mA Max 5 C to 30 C 41 F to 86 F Non Volatile Settings Do Not Require Battery Backup Modbus RTU 4 8K 9 6K 19 2 K 1 Stop Bit 8 Data Bits 1 Start Bit No Parity ABS Poly Blend UV Stabilised and Fire Rated 3 Year RTB Great care has been taken in the preparatio
21. ith the onboard sensor Multiple sensors can be used for averaging over larger areas if necessary Wireless RF remote sensors are also available if fixed wiring cannot be installed economically P N RS W Page 13 Installer Options Menu The SMT 131 has an impressive list of options that can be installer selected These options tune the thermostat s performance as well as set energy conservation settings This menu is deliberately hidden and difficult to enter to discourage unauthorised tampering The information card provided in the SMT 131 box provides details on how to enter the SMT 131 menu If this is lost please contact Smart Temp or an authorised distributor for support Navigating Through the Installer Mode Settings The bottom right button steps forward through the menu options the bottom left button steps you backwards Adjust your options with the up down buttons Exit the menu saving changes by pressing and holding the bottom right or wait 3 minutes and the SMT 131 will automatically exit the installer menu The current menu option is shown between the left and right buttons The example to the right shows option 3 select deg C option 0 or F display option 1 Option List Table Option Setting 0 Buttons Shown 0 Both mode and fan buttons show default 1 Show mode but fan button hidden 2 Show fan but mode button hidden 3 Both mode and fan buttons Hidden Note
22. main unchanged and can be used to control a DC fan or other devices 2 Pipe Mode The SMT 131 can measure water temperature via a sensor strapped to the water pipe and wired into the SMT 131 Sensor input terminals Sl and Com 0 10 input Based on the pipe temperature the room temperature and the set point the SMT 131 will control either the heating or the cooling outputs to maintain guest comfort When 2 pipe is mode is used the SMT 131 will occasionally open the water valve to allow water flow within the pipe so the SMT 131 can sample pipe temperature to determine confirm operation mode If mode selection is permitted the SMT 131 will only permit the appropriate mode to be selected based on the pipe temperature To use the SMT 131 in 2 pipe mode set DIP 2 OFF and DIP 4 to the ON position Set Installer menu option 26 Si amp Com 0 V to option 3 2 Pipe Mode See page 16 The pipe sensor needed for 2 pipe mode is the RS 1d sensor available as an optional part from Smart Temp or an authorised distributor Page 8 Ancillary Functions The SMT 131 has a number of additional capabilities such as communications with Building Automation systems via its Modbus communications port The SMT 131 will automatically control temperature set points based on occupancy of the room when a suitable door switch and movement sensor is fitted The SMT 131 can even automatically shut down the air conditioning system if balcony door
23. n of this manual Smart Temp Australia P L takes no responsibility for errors or omissions contained in this document It is the responsibility of the user to ensure this controller or equipment connected to it is operating to their respective specifications and in a safe manner Due to ongoing product improvement Smart Temp Australia P L reserves the right to change the specifications of the SMT 131 thermostat or its components without notice All rights reserved Smart Temp Australia P L 2011 Page 23 Intellectual rights apply
24. ntact The window contact input WC is used to automatically disable the HVAC system if a window is left open This is done to prevent energy waste by trying to heat or cool an open room The SMT 131 window input can be set for a Normally Open switch open when window is closed or normally closed logic switch closed when window is closed When the window is left open for longer than the pre set time 0 to 300 seconds the SMT 131 will automatically turn OFF The text OFF will flash in the LCD to indicate that the remote window or door switch is holding the SMT 131 in off mode The wall controller will prohibit all changes The SMT 131 will automatically restart once the window is closed The Installer menu option 28 Window Input Logic and option 29 Window Input Delay page16 sets the window detection logic in the SMT 131 Fault Indication The SMT 131 can display the text FLt alternating with the temperature should you wish to alert the user of an external fault with the heating or cooling system To enable this function enter the installer menu and set the Window contact input setting 31 to option 3 See page 16 for this setting When the WC terminal and the Com OV terminal are joined the SMT 131 will alternate FLt with the current room temperature Register 32 will permit a time delay to be set after the fault signal is received if necessary to reduce false trips The fault indication has NO effect on
25. o initiate Page 16 Modbus Data Addendum 1 The SMT 131 has integrated Modbus RTU communications Using a Modbus master controller such as the Smart Temp 770 HMI many of the SMT 131 thermostat features can be centrally controlled and monitored Modbus is a simple protocol that is extremely popular due to its robustness and simple implementation It is also a forgiving protocol and will tolerate many installation errors This being stated however correct wiring practices should be used to achieve maximum reliability See page 10 for details on wiring Modbus networks The SMT 131 Modbus data is within the 40XXX range this being holding registers Depending on your choice of Modbus Master you may need to enter the address using the full address such as 40012 or by selecting Holding Registers and entering the address simply as 12 These modbus registers are shown as Base 1 PLC addressing format Depending on your modbus master addressing format you may need to subtract 1 from these values to convert to base 0 protocol addressing format Note The Modbus data layout may seem unorganised in this document for example 0 10v for heat and cool is at register 40040 amp 40041 while the 0 10V output for the fan is at register 40068 This is done to maintain backwards compatibility with the SMT 131 version 1 All the new functions added to version 2 of the SMT 131 have their Modbus registers a
26. ode Sw 1 OFF Med Indoor Fan Medium Speed NOT Used in Single fan speed mode Sw 1 OFF Low Indoor Fan Low Speed Used in single amp three fan speed mode Y Compressor or Cool Based on Sw 2 setting W O B Reversing Valve or Heat Based on Sw 2 setting A1 Cool 0 10V Output for Cooling Typically used to control modulating valves A2 Heat 0 10V Output for Heating Typically used to control modulating valves A3 Fan 0 10V Modulating Output for Indoor DC Fan Com OV OV terminal Used for 0 10V sensor or digital inputs ground reference A Modbus Data A B Modbus Data B SI Remote temperature sensor input Remote average Modbus data use DI Digital Switched input for forced un occupied or initiate doorbell function WC Window Contact Forces SMT 131 OFF if window open gt 5 min Adjustable DS Door Switch Monitors room door status for occupancy detection see page 11 PIR PIR Movement sensor input for occupancy detection see page 11 Page 5 The SMT 131 is powered by 24VAC and requires the 24VAC active and neutral to be connected to the R active and C Neutral terminals for the SMT 131 to function The 24VAC applied to the SMT 131 R terminal is switch back through the 2A relays to the equipment Note the drawing provided here W O B C R jol Y Hi ed Low Caution Although the SMT 131 is a robust device wiring e
27. or station backlight colours Connection between the SMT 131 and the hotel door station is cable fitted with RJ12 plugs Cables can be provided at additional cost at up to 15 metres maximum Alternatively custom cables can be produced They are direct wired not cross over When fitting the door station the SMT 131 DIP Sw8 must be ON The outside door station will flash all LCD segments if DIP Sw8 is in the wrong position Automatic Day Set Temperature The SMT 131 can optionally reset the user set point and replace with an installer defined set point after the SMT 131 has been off for more than 6 hours This will typically happen after one guest has checked and before the next guest checks in but will not generally effect a guest who may turn the thermostat off for a few hours or so or who may go out for the afternoon Option 40 in the installer menu defines this Function Off or a value between 15 and 30c or 59 86F Modbus Wiring Modbus communications unlock many additional functions within the SMT 131 thermostat It also permits all modes functions and controls to be remotely supervised and adjusted from a central location if needed Modbus object data can be found on page 14 of this manual The SMT 131 uses a high powered Maxim chipset that will theoretically permit the connection of up to 255 devices on a single Modbus node RF noises and other interferences will reduce the real world permitted connections to a maximum of 150
28. rce the SMT 131 into Un occupied Mode This input can be wired to a simple card reader or other 3 party system that may be pre installed for room occupancy detection When the SMT 131 is in Un occupied Mode the display will go completely blank except for the words Unoccupied in the top left If the optional HOT 243 hall way panel is installed its display backlight will go out to let housekeeping know the room is empty Modbus register 40004 also indicates occupancy status Doorbell A built in doorbell feature is included with the SMT 131 thermostat This is normally activated by the optional outside door station as described above or via Modbus data link In circumstances where this is not convenient the Digital Input DI terminals can be reassigned as a doorbell activation switch with the digital input options detailed in the installer menu see page 16 Simply place a momentary volt free switch across DI and Com O V terminals to activate the doorbell Once pressed the doorbell will chime for about 10 seconds Normally Open Momentary Switch ee Outside Door Station When coupled with the optional Smart Temp door station the guest has the ability to set the room as Do Not Disturb call for housekeeping or be alerted to visiting guests with a pleasant doorbell chime Hotel staff are informed about the room status or guest s needs by text information displayed on the door station LCD or the do
29. rrors can potentially damage the thermostat This damage is NOT covered by warranty Take care when wiring 24V near sensor inputs or the Modbus communications terminals Heat Pump 3 Fan Speed OO Equipment Low Low Fan i Dip Switch Settings Med Med Fan i SW1 Fan ON 3 Speed SMT 131 io SW2 Mode ON HP mode en m High Fan i SW3 RiValve ON Heat OFF Cool ic i SW4 2 4 Pipe ON 4 Pipe T ompressor i SW5 Anticycle ON Timer ON H i H SW6 Not Used Not Applicable pom Ai ign ny c R KA H Reversing Valve i SW7 Fan Vent Customer Preference 24 V Active H SW 8 Door Station Customer Preference 24 C Neutral Heat Cool 1 Fan Speed OO Equipment Low Fan i Dip Switch Settings Med Cool H SW1 Fan OFF 1 Speed SMT 131 i SW2 Mode OFF HC mode Hi Heat SW3 RiValve ON HE OFF HG i n i SW4 2 4 Pipe ON 4 Pipe Y 24 V Active i SW5 Anticycle ON Timer ON H i SW6 Not Used Not Applicable had Eee Feel IEEE 24 C Neutral SW7 FanVent Customer Preference SW8 Door Station Customer Preference Equipment Low Low Fan Dip Switch Settings Med Med Fan SW1 Fan ON 3 Speed SMT 131 i k SW2 Mode OFF HC mode Hi High Fan SW3 RiValve ON HE H n i SW4 2 4 Pipe ON 4 Pipe y m 24 V Active SW5 Anticycle OFF Timer OFF i SW6 Not Used Not Applicable el Ped ia Fey R ae 24 C
30. s or windows are left open when the optional door window switch are fitted When you wish indication of the room status and an integrated doorbell from the hall way outside the room the SMT 131 can be fitted with the optional HOT 243 hall panel Complete System Overview The SMT 131 is the hub of a PIR compressive room comfort and Sensor energy control system As shown in SS the picture the SMT 131 accepts Door Switch HOT 243 door window and PIR contact inputs Co to automatically control temperature set points The HOT Window Switch 243 wall controller mounted in the mt hallway outside of the room provides feedback of the guests needs to housekeeping plus provides a convenient button to activate the SMT 131 internal door bell Regardless of the need to control conferential HVAC systems 2 or 4 pipe fan coils with modulating valves the SMT 131 has the necessary outputs to achieve your control needs Occupancy Detection The SMT 131 has sophisticated logic that when connected to your choice of movement sensors door and window switches will automatically Door Switch control the set point and mode of the Window Switch SMT 131 Using part or all of the functions described below are completely optional The SMT 131 will function perfectly as a HVAC controller without the door window or occupancy detection logic enabled DO NOT APPLY EXTERNAL VOLTAGES TO THESE INPUTS Page 9 Window Co
31. s when closing push excess wires into the wall cavity Never press on the LCD when closing the SMT 131 as it may crack Always press on the SMT 131 plastic case only DIP Switch Settings Switch Function On Off Swi Indoor Fan Mode 3 Fan Speed 1 Fan Speed Sw2 Equipment Type Heat Pump Heat Cool Sw3 HP Mode Sw2 ON Rev Valve Heat B Rev Valve Cool O HC Mode Sw2 OFF HE Fan With Heat HG No Fan In Heat Sw4 2 4 pipe mode 2 pipe mode 4 pipe Mode Sw5 Comp Protection Delay 5 Min Anti Cycle Immediate Comp start Sw6 Klixon Mode On off Sw7 Ventilation Mode Permitted Not Permitted Sw8 Door Station Optional Fitted Door Station Not Used Note The SMT 131 reads the switch settings on power up only If you change any DIP switch settings you must cycle power or press the reset button before these changes will take effect It is expected that only qualified people will make adjustment to these dip switch settings Knowledge of the HVAC system under the control of the SMT 131 is essential prior to making adjustment to these DIP switch settings Caution Incorrect adjustment of these DIP switch settings could cause HVAC equipment damage This would NOT be covered by warranty Wiring HVAC Control Terminal Designations Terminal Function C 24V Neutral R 24V Active This voltage is switched back through the relays Hi Indoor Fan High Speed NOT Used in Single fan speed m
32. t the end of the version 1 SMT 131 Modbus register list Data Format Protocol Modbus RTU Byte Format 1 Start Bit 8 Data Bits 1 Stop Bit No Parity Address 1to 255 Baud 4800 9600 19200 BPS Holding Type Value Comments Register 1 Read Only Device ID Always Returns 131 Use As A Sentinel Point 2 Read Only Firmware Version Divide By 100 e g Version 2 36 236 3 Read Only DIP Switch State Binary Count Sw 1 1 Sw2 2 Sw3 4 Sw 4 8 etc 4 Read Write Occupancy Status 0 Room is Unoccupied 1 Room is Occupied Note Modbus can write 0 holding the room unoccupied regardless of the occupancy input Modbus cannot override the occupancy input and hold the SMT 131 in occupied mode Page 17 5 Read Only Bell Status 0 Bell Is Silent 1 Bell Is Chiming 6 Read Write Door Station Status 0 Normal No Activity 1 Make Up Room Active 2 Do Not Disturb Active 7 Read Write HVAC Status 0 Air Conditioning Off 1 or 3 Fan Speed 1 Low Speed Ventilation 1 or 3 Fan Speed 2 Med Speed Ventilation 3 Fan Speed Only 3 High Speed Ventilation 3 Fan Speed only 4 Air Conditioning ON 1 or 3 Fan Speed 8 Read Write Fan Status 3 Fan Speed Mode 0 Low Fan Auto 1 Med Fan Auto 2 High Fan Auto 3 Auto Fan Speed Fan Auto 4 Low Fan On 5 Med Fan On 6 High Fan On 7 Auto Fan Speed Fan On 1 Fan Sp
33. thermostat function Door Switch The Door switch input DS is used by the SMT 131 for 3 functions 1 To detect that the door has been opened and then closed to let somebody into or out of the room 2 To detect if the door has been left open 3 To use as an occupancy or Auto Off timer in training rooms or similar The SMT door switch input can be set for a Normally Open switch open when door is closed or normally closed logic switch closed when door is closed or OFF input not used The Installer menu 30 Door Input Logic and option 31 Door Input Delay page 16 sets the door detection logic in the SMT 131 Entering or exiting the room Once the door is opened and then closed the SMT 131 will begin its occupancy detection process using the PIR input described below Based on the outcome of this process the SMT 131 will remain on and permit guest interaction with the SMT 131 adjust mode and set point for example or switch to un occupied mode where the SMT 131 will substitute the guest set point and mode for the installer pre set values Page 10 Door Left Open When the door is left open for longer than the pre set time O to 300 seconds the SMT 131 will automatically turn OFF The text OFF will flash in the display to indicate that the remote door or window switch is holding the SMT 131 in off mode This is done to prevent energy waste by trying to heat or cool an open room The SMT 131 will automatically r
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