SMT - 131
Manual
Ver 2.1
Page 1: ...SMT 131 Manual Ver 2 1...
Page 2: ...ic and High fan limit Index Index 2 Introduction 3 Thermostat operation 3 Installation HVAC Control 4 DIP Switch Settings 5 Wiring HVAC Control 5 0 10v Outputs 7 Belimo 6 Way Valve 8 2 Pipe Mode 8 Anc...
Page 3: ...e thermostat to operate and has been designed to not require a user manual The diagram to the left shows all LCD elements and the 7 buttons Up Down Make Up Room Do Not Disturb On Off mode Fan Mode Deg...
Page 4: ...sfaction 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 S...
Page 5: ...4V Neutral R 24V Active This voltage is switched back through the relays Hi Indoor Fan High Speed NOT Used in Single fan speed mode Sw 1 OFF Med Indoor Fan Medium Speed NOT Used in Single fan speed mo...
Page 6: ...is damage is NOT covered by warranty Take care when wiring 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...
Page 7: ...tput 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 vary betw...
Page 8: ...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 No...
Page 9: ...system As shown in the picture the SMT 131 accepts door window and PIR contact inputs to automatically control temperature set points The HOT 243 wall controller mounted in the hallway outside of the...
Page 10: ...closed The Installer menu 30 Door Input Logic and option 31 Door Input Delay pageError Bookmark not defined sets the door detection logic in the SMT 131 Entering or exiting the room Once the door is o...
Page 11: ...ay have been some time since the door was closed Installer option PIR Input Delay page Error Bookmark not defined sets the PIR mode On or Off and the seek time value 1 to 15 minutes Manual Occupancy I...
Page 12: ...ipset 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...
Page 13: ...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 d...
Page 14: ...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...
Page 15: ...nly 1 Always On high 2 Low when standby high when active Default 27 TT sensor SI Com 0 Remote Use this sensor in place of the fitted sensor 1 Average Use both remote and fitted sensor and control to t...
Page 16: ...s 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 Not...
Page 17: ...Point Deg C 0 5 C Steps Deg F 1 F Steps Value 10 e g 23 5 C 235 40010 Read Write Contact Reception Notification 0 Off 1 Show Contact Reception on LCD SMT 131 LCD will flash Contact Reception on LCD an...
Page 18: ...C to 3 C in 0 5 C Steps 1 F to 6 F in 1 F Steps Value 10 e g Heat Span of 1 C 10 40020 Read Write 0 10V Cool Span 0 5 C to 3 C in 0 5 C Steps 1 F to 6 F in 1 F Steps Value 10 e g Cool Span of 1 C 10...
Page 19: ...40029 Read Write Belimo Mode 0 Standard 0 10V Valve Logic 1 Belimo 6V Off 3 Way Valve Logic 40030 Read Write Modbus Address 1 to 255 40031 Read Write Baud Rate 1 4 8Kbs 2 9 6kbs 3 19 2Kbs 40032 Read...
Page 20: ...Minimum Voltage 0 10v Fan value x 10 40052 Read Write 0 10 Heat Interval 10 300 seconds in 10 second steps 60 seconds default 40053 Read Write 0 10 Heat Direction 0 10V is 100 open forward acting 1 0V...
Page 21: ...Range 5 C to 30 C 41 F to 86 F Memory Type Non Volatile Settings Do Not Require Battery Backup Communications Modbus RTU 4 8K 9 6K 19 2 K 1 Stop Bit 8 Data Bits 1 Start Bit No Parity Plastic ABS Poly...
