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Summary of Contents for Smart temp SMT-131
- Page 1 SMT - 131 Manual Ver 2.1...
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Page 2: Table Of Contents
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. Index Index Introduction Thermostat operation Installation - HVAC Control DIP Switch Settings Wiring –... -
Page 3: Introduction
Introduction The Smart Temp SMT-131 thermostat has been designed for use in hotel rooms and other locations where the user will require a thermostat that is simple to understand and functions in a logical manner. Further, given the nature of the hospitality industry in general it is important that the thermostat be very intuitive, robust and attractive. -
Page 4: Installation - Hvac Control
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. -
Page 5: Dip Switch Settings
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. - Page 6 24V near sensor inputs or the Modbus communications terminals. 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 the valves if needed.
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Page 7: 0-10V Outputs
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. -
Page 8: Belimo ™ 6 Way Valve
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 & Com 0-V” to option “3” – 2 Pipe Mode. (See page 15) 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 9: Ancillary Functions
The SMT-131 can even automatically shut down the air conditioning system if balcony doors or windows are left open when the optional door / window switch are fitted. - Page 10 Door Left Open When the door 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 display to indicate that the remote door (or window switch) is holding the SMT-131 in off mode.
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Page 11: Doorbell
SMT-131 will again begin its occupancy detection process. Note - even when the SMT-131 is in “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. -
Page 12: Modbus Wiring
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. -
Page 13: Remote Temperature Sensors
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. - Page 14 Option List Table Option Setting 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 Permitted Modes 0: Off / Auto 1: Off / Auto / Heat / Cool 2: Off / Heat /Cool 3: Off / Heat...
- Page 15 0-10V Heat minimum 0 -10V Voltage Data format : 0-10V Heat minimum value * 10 Cool span 0.5C-3.0C/1.0F-6.0F 0.5C/1F steps Data format : Fan span * 10 0-10V Cool interval (PI) 10-300 seconds 10 seconds steps (60 seconds default) 0-10V Cool direction 0: 10V is 100% open (forward acting) 1: 0V is 100% open n(reverse acting) 0-10V...
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Page 16: Modbus Data - Addendum 1
The reason for this is that the SMT-131 version II has been made 100% backwards compatible with the SMT-131 version 1. All the functions added to version 2 of the SMT-131 have their Modbus registers at the end of the version 1 SMT-131 Modbus list. - Page 17 Modbus cannot override the occupancy input and hold the SMT-131 in occupied mode. 40005 Read Only Bell Status 0 = Bell Is Silent 1 = Bell Is Chiming 40006 Read / Write Door Station Status 0 = Normal - No Activity 1 = “Make Up Room”...
- Page 18 40018 Read / Write 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...
- Page 19 40024 Read / Write Unoccupied Fan 3 Fan Speed Mode 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...
- Page 20 Values below only apply to version 2 hardware only, Firmware version 3+ 40043 Read / Write 2 pipe mode 0 = Heat changeover 1 = Cool 40044 Read / Write Thermostat 0 = Deg C Displaying 1 = Deg F 40045 Read / Write Buttons shown on...
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Page 21: Specifications
Warranty 3 Year RTB Great care has been taken in the preparation 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.