SMART TEMP SMT-131 Hotel Touchscreen Thermostat User Manual

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SMT - 131  

Manual  

Ver 2.7  

30/3/23  

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General	Details
Name	SMART TEMP SMT-131 Hotel Touchscreen Thermostat User Manual
Make	SMART TEMP
Language	English
Filetype	PDF (Download)
File size	0.34 MB

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• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• SMART TEMP

SMART TEMP SMT-131 Hotel Touchscreen Thermostat User Manual Overview

Summary of Contents

• Page 1: Page 1
• Page 2: Revision history includes updates and enhancements made to the document. The original document was revised to include mode select in Modbus and temperature calibration. Enhancements in firmware versions 3.0+ and 40.2+ were added, including fan relay lock and sensor calibration. The introduction section outlines thermostat operation and installation for HVAC control. DIP switch settings and wiring for HVAC control are detailed. Terminal designations and 0-10v outputs are specified. Belimo™ 6 way valve and 2 pipe mode are discussed. Occupancy detection and fault indication features are included. Additional topics cover automatic day set temperature and remote temperature sensors. The installer options menu and Modbus data addendum are provided, along with specifications.
• Page 3: Introduction The Smart Temp SMT-131 thermostat is designed for hotel rooms and guest accommodations, focusing on simplicity and user-friendliness. It is robust, flexible in function, and attractive, catering to the hospitality industry's needs. The SMT-131 includes advanced energy conservation features like set point limit control and automatic unoccupied heating and cooling settings. It supports Modbus RTU communications for integration with building automation systems or hotel check-in systems. The thermostat interfaces with the Smart Temp OC-3D occupancy detection system and HOT-242 Door Station system for enhanced functionality. Thermostat operation The SMT-131 is designed to be simple to operate, not requiring a user manual. The thermostat features an LCD display with seven buttons for various functions. The On/Off button allows users to turn the thermostat on or off and select heating or cooling modes. Users can adjust the target temperature using the Up or Down button, with adjustable limits set by the installer. The fan button allows cycling between auto fan and continuous fan modes, with options for single or three fan speed settings.
• Page 4: Option 16 in the installer menu permits you to set the SMT-131 to automatically reset the indoor fan to Automatic Mode 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. If Fan On mode is selected, then the fan will continue to run after the heating and cooling stops to maintain ventilation. If permitted by DIP Sw7, the user can run the indoor fan only (Ventilation Mode) when the SMT-131 is off by tapping the fan button. When enabled by DIP Sw8, pressing the Make up Room & Do Not Disturb buttons will activate relevant LCD segments and backlight colour on the optional outside door station. 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. Open the SMT-131 wall controller by placing a flat blade screwdriver or coin in the slot on the bottom of the thermostat case and gently twist to release the case locking clip. The SMT-131 should be mounted in a convenient location at approximately 1.2 to 1.5 meters from the ground. It is highly recommended that any penetrations in the wall where wiring may pass be sealed to prevent drafts from entering the rear of the thermostat.
• Page 5: Take care to ensure excess wiring is not trapped between the cases when closing. Never press on the LCD when closing the SMT-131 as it may crack. DIP switch settings are crucial for the operation of the SMT-131. The SMT-131 reads the switch settings on power up only. If you change any DIP switch settings, you must power cycle before these changes will take effect. Incorrect adjustment of these DIP switch settings could cause HVAC equipment damage. Wiring terminal designations include 24V Neutral and 24V Active. Indoor fan speeds are affected by the DIP switch settings. The SMT-131 includes inputs for remote temperature sensors and occupancy detection. Knowledge of the HVAC system is essential prior to making adjustments to DIP switch settings.
• Page 6: The SMT-131 is powered by 24VAC and requires the active and neutral to be connected to the “R” and “C” terminals for proper function. The 24VAC applied to the SMT-131 “R” terminal is switched back through the 2A relays to the equipment. Caution: Wiring errors can potentially damage the thermostat. Warranty does not cover this damage. Take care when wiring 24V near sensor inputs or the Modbus communications terminals.
• Page 7: Note - When the SMT-131 calls heating or cooling, it will drive both the relays and the 0-10V outputs simultaneously. The SMT-131 has been fitted with 3 x 0-10V outputs for controlling modulating heating and cooling valves as well as variable speed DC fan motors or variable capacity HVAC systems. The 0-10V outputs in the SMT-131 are PI (Proportional Integral) controlled, providing accurate and cost-effective control of heating and cooling valves. There may be slight disparity between the thermostat display and the 0-10V outputs actions, as the 0-10V outputs can provide finer control than the ON/OFF relays. A1 – Cool: This output is used to control a cooling 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. The installer menu provides settings for the control of the three 0-10V outputs, including span, time interval, direction, and minimum value. Span sets how aggressive the 0-10V will move for a given temperature change, with a range of 0-5C. Time interval sets the running average calculation time, with a range of 10-300 seconds.
• Page 8: Maximum value output only When controlling 0-10V fans, it is necessary to limit the fan speed to reduce noise or protect ducting. The fan output has a high voltage limit setting that will not exceed the pre-set high limit. These settings can be found in the installer menu. Belimo™ manufactures an actuator that is in full cooling at 2V, off at 6V, and full heating at 10V. To use this actuator with the Smart Temp SMT-131, set valve type to “Belimo™ Mode” in the installer menu. The heating 0-10V output only is used in this mode. The SMT-131 can measure water temperature via a sensor strapped to the water pipe. If the pipe temperature is above 30°C, the SMT-131 is in heating mode; if below 20°C, cooling mode is used. When 2 pipe mode is used, the SMT-131 will open the water valve for 30 seconds every 10 minutes. To use the SMT-131 in 2 pipe mode, set DIP 2 OFF and DIP 4 ON, and set Installer menu option 27 to “3” – 2 Pipe Mode.
• Page 9: The pipe sensor needed for 2 pipe mode is the RS-1d sensor, available as an optional part. The SMT-131 Heat and Cool mode can be changed by a remote manual mechanical switch or an automatic Klixon switch if required. A Klixon switch is a mechanical temperature switch typically placed on a water pipe to detect water temperature. To activate Klixon mode, place a Klixon switch between the DI and Com input and turn on DIP switches 4 and 6. The SMT-131 will automatically change Installer Option 1 to function 2, allowing the user to turn the thermostat on or off and adjust set temperature and fan modes. By default, heating mode will be selected if the switch is closed, and cooling mode will be selected if the switch is open. The SMT-131 has several additional capabilities such as communications with Building Automation systems via its Modbus communications port. The SMT-131 can automatically control temperature set points based on occupancy when a suitable door switch and movement sensor are fitted. The SMT-131 can shut down the air conditioning system if balcony doors or windows are left open when optional switches are fitted. The SMT-131 is the hub of a comprehensive room comfort and energy control system, accepting various inputs to automatically control temperature set points.
• Page 10: Activate the SMT-131 internal door bell. The SMT-131 has the necessary outputs to control conferential HVAC systems. Occupancy detection is facilitated by connecting movement sensors, door, and window switches. The SMT-131 will function as an HVAC controller without occupancy detection logic enabled. There are two types of occupancy detection modes provided by the SMT-131. The window contact input automatically disables the HVAC system if a window is left open. The SMT-131 window input can be set for normally open or normally closed logic. The SMT-131 will automatically turn off if a window is left open for longer than the pre-set time. The SMT-131 can display a fault indication to alert the user of an external fault with the heating or cooling system. The fault indication has no effect on thermostat function.
• Page 11: Door switch input (DS) is used by the SMT-131 for three functions: detecting door status, detecting if the door is left open, and functioning as an occupancy or Auto-Off timer. The SMT door switch input can be set for Normally Open, Normally Closed, or OFF logic. Once the door is opened and closed, the SMT-131 begins its occupancy detection process using the PIR input. If the door is left open for longer than the pre-set time, the SMT-131 will automatically turn OFF to prevent energy waste. The SMT-131 will restart automatically once the door is closed. A PIR movement detector can be wired to the SMT-131 to determine the occupancy status of the room. Latched occupancy detection requires both a door switch and PIR input to function. When the door is opened, the SMT-131 enters Occupied Mode allowing the occupant to set their desired temperature. If no movement is detected within the pre-set seek time, the SMT-131 will return to Un-occupied mode. If movement is detected within the seek time, the SMT-131 will latch into Occupied Mode.
• Page 12: The room remains in Occupied Mode to ensure it stays conditioned even if the occupant stops moving or sleeps. The SMT-131 will begin its occupancy detection process when the door is opened and closed again. Even in Un-occupied Mode, the SMT-131 uses the PIR input to determine room occupancy. For example, if one person leaves a hotel room while the other sleeps, the SMT-131 will enter Un-occupied Mode but will re-enter Occupied Mode when the sleeper moves. The installer option PIR Input Delay sets the PIR mode and the seek time value. When using a PIR only for occupancy detection, wire the PIR directly to the door switch input of the SMT-131. The SMT-131 will turn the air conditioning on when movement is detected and switch to Un-Occupied Mode after the last person leaves. Steps to use the SMT-131 in automatic occupancy detection mode include wiring the PIR movement detector, setting the PIR input delay period, and placing a link shorting the PIR input to Com 0V. The digital input and Com 0-10 terminals can force the SMT-131 into Un-occupied Mode. The display will show Unoccupied in the top left corner when in this mode. A built-in doorbell feature is included with the SMT-131 thermostat, activated by the optional outside door station or via Modbus data link. The digital input terminals can also be reassigned as a doorbell.
• Page 13: Activation switch with digital input options is detailed in the installer menu. A momentary volt free switch can be placed across “DI” and Com “0-V” terminals to activate the doorbell. The doorbell will chime for about 10 seconds once pressed. The optional Smart Temp door station allows guests to set the room as “Do Not Disturb” and call for housekeeping. Hotel staff are informed about room status or guest needs via text displayed on the door station LCD. Connection between the SMT-131 and the hotel door station is cable fitted with RJ12 plugs. The SMT-131 can optionally reset the user set point after being off for more than 6 hours. Modbus communications unlock additional functions within the SMT-131 thermostat. The SMT-131 uses a high-powered Maxim chipset that permits connection of up to 255 devices on a single Modbus node. Reliable Modbus communication relies on quality cable and good installation practices.
• Page 14: Modbus data is provided in Addendum 1 at the back of this manual. Modbus relies on a series connection and will normally not tolerate “Star” wiring or “T” branches. 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 resistive device (10K Type II NTC) not polarity dependent and simply wired into the SMT-131 sensor input terminals. Depending on installer menu sensor settings, remote sensor(s) will either override the SMT-131 onboard sensor or average with 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.
• Page 15: Installer options menu provides a list of options that can be selected by the installer to tune the thermostat's performance and energy conservation settings. The menu is deliberately hidden to discourage unauthorized tampering. Details on how to enter the SMT-131 menu are provided on the information card included in the box. The bottom right button steps forward through menu options, while the bottom left button steps backward. Options can be adjusted using the up/down buttons. Changes can be saved by pressing and holding the bottom right button or by waiting three minutes for automatic exit. The current menu option is displayed between the left and right buttons. Option 3 sets the native temperature display format as degrees Celsius or Fahrenheit. The option list table outlines various settings for mode and fan button visibility. 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.
• Page 16: High temp set limit Low temp set limit Dead band Fan purge / run on period Fan span Fan direction Heat span Cool span Auto off timer Un-occupied heat set point
• Page 17: - Unoccupied fan mode - Fan speed modes: Low (Auto), Med (Auto), High (Auto), Low (ON), Med (ON), High (ON) - Backlight settings: On with button press, Always On high, Low when standby/high when active - Sensor options: Remote, Average, Data, Duct - Temperature calibration adjustments - Digital input settings: Klixon Mode, Normally Open, Normally Closed - Window and door input logic and delays - PIR input delay settings - Fan reset options - Modbus address and baud rate settings
• Page 18: Thermostat response to changes in room temperature includes settings for very fast, fast, normal, slow (default), and very slow responses. Temperature calibration allows for an offset correction factor from -9.9°C to +10°C, with a default of 0.0°C. The SMT-131 has integrated Modbus RTU communications for central control and monitoring of thermostat features. Modbus is a robust and simple protocol that tolerates many installation errors, but correct wiring practices are essential for reliability. The SMT-131 Modbus data is within the 40XXX range, specifically holding registers. Depending on the Modbus Master, addresses may need to be entered in full or as holding registers. Modbus registers are shown in Base 1 format, and adjustments may be necessary for Base 0 format. The Modbus data layout may appear unorganized, but this is to maintain backwards compatibility with previous versions. New functions added in version 2 of the SMT-131 have their Modbus registers located at the end of the version 1 register list.
• Page 19: Data format Protocol Modbus RTU (Slave) 1 Start Bit, 8 Data Bits, 1 Stop Bit, No Parity Baud 4800 / 9600 / 19200 BPS Device ID Always Returns “131” Occupancy Status Modbus cannot override the occupancy input and hold the SMT-131 in occupied mode. Bell Status HVAC Status User Set Point
• Page 20: Read/Write room temperature values for calibration. Temperature display options include room and set temperature or set temperature only. Temperature format can be set to Celsius or Fahrenheit. User set point high and low limits can be configured. Dead band settings range from 0.5°C to 5.0°C in specified steps. Relay span function is inactive in version 3 code for backwards compatibility. Fan purge periods can be set for various durations. Heat and cool span values are adjustable in specified steps. Auto off timer can be set from 1 to 10 hours in 0.5-hour steps. Unoccupied heat and cool set points are adjustable within specified ranges.
• Page 21: Read and write functions for fan speed modes are defined, including low, medium, and high settings for both auto and on modes. Backlight settings include options for on with button press only, always on high, and always on low with button press. Digital input functions can be disabled or set to leave fan mode unchanged or reset fan to auto at switch off. Modbus address and baud rate settings are specified, with options for different communication speeds. Version 3.09+ firmware allows Modbus to override all SMT-131 outputs, including relays and 0-10V outputs. Rules for overriding specific registers are outlined, including conditions related to the anticycle timer and fan speed settings. The anticycle timer must be off to override certain relay registers. Specific mode settings must be configured to override other relay registers. Single fan speed selection is required for certain relay overrides. The document provides detailed instructions for configuring and managing fan and sensor settings.
• Page 22: The 3 x 0-10V 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. To return the output to SMT-131 control, simply enter 1001 into the register. 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 thermostat's memory life to only a few years. Using this function will void the SMT-131 warranty for the memory chip within the thermostat. 0-10V Heat Value is read/write with a value of the output divided by 10. 0-10V Cool Value is read/write with a value of the output divided by 10. Permitted modes include Auto, Heat Only Mode, and Cool Only Mode. Thermostat displaying options include temperature unit settings and button visibility settings.
• Page 23: Hide both mode and fan buttons.
• Page 24: Permitted modes include Off/Auto, Off/Heat/Cool/Auto, Off/Heat/Cool, Off/Heat, and Off/Cool. Fan span can be adjusted in 0.5C steps or 1F steps. Data format for fan span is multiplied by 10. Fan intervals range from 10 to 300 seconds, with a default of 60 seconds. Heat and cool intervals also range from 10 to 300 seconds, with a default of 60 seconds. Window input logic options include normally open, normally closed, and off. Door input logic options include off, normally open, and normally closed. PIR input delay can be set from 1 to 60 minutes. Unit run time log measures total heat and cool run time in 0.1 hours. Window input status indicates whether it is open or closed.
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• Page 26: Specifications Input voltage: 24VAC 50/60 Hz +/- 15% Operating temperature: 0°C to 50°C (32°F to 122°F) Operating RH: 0-95% (Non-Condensing) Storage temperature: 0°C to 65°C (32°F to 150°F) Size: 113 x 103 x 25mm Display size: 69.5 x 46.3mm Display type: STN Touch Panel Memory type: Non-Volatile - Settings do not require battery backup Warranty: 3 Year RTB Smart Temp Australia P/L takes no responsibility for errors or omissions contained in this document.