VAV Thermostat Controller Specification and Installation Instructions TROB24T4XYZ1-BACnet-180301-ESA.docx Page | 1 Model TROB24T4XYZ1 with BACnet Communication Description The TROB24T4XYZ1 is a combination controller and thermostat with support for networked communications via the BACnet MS/TP protocol. The VAV Thermostat Controller is designed for simple and accurate control of any variable air volume box in a number of zone control configurations. Its field configurable algorithms enable versatile implementation of required control sequences. Applications Cooling only with or without terminal reheat Heating/cooling with or without auto-changeover and terminal reheat Pressure dependent or pressure independent Single duct or dual duct Serial or parallel fan power boxes (on/off or ECM) Supply and exhaust applications Auxiliary heating sources, such as electric baseboards, can also be applied Features Backlit LCD with simple icon and text driven menus Configurable inputs and outputs Precise temperature control with programmable PI function Selectable Fahrenheit or Celsius scale Manual night setback override Multi level lockable access menu and setpoint Selectable internal or external temperature sensor (10 KΩ) Changeover by contact or external temperature sensor Pressure sensor input with air flow program Selectable proportional control band and dead band Anti-freeze protection BACnet ® MS/TP @ 9.6k, 19.2k, 38.4k, 76.8k bps o Selectable MAC address o Automatic or manual device instance assignment o Automatic baud rate detection o Copy and broadcast configuration to other networked TROB24T4XYZ1 modules TROB24T4XYZ1 Typical Application VAV applications incorporate a central unit that delivers a controlled volume of air, which can be cooled or heated, to multiple zones. Each zone incorporates a VAV control box with a motorized damper to adjust the flow of air to the controlled zone based on the demand. Some configurations include one or more of the following: air flow pressure sensor, fan, duct heater, duct temperature sensor, and auxiliary heat (e.g. baseboard). * Consult www.neptronic.com for details on these Neptronic products. Technical Specifications Description TROB24T4XYZ1 Inputs 3 Universal analog inputs: 0-10Vdc, Thermistor (10k Type 3), or digital input (dry contact) Available for sensors: external temperature, changeover, night setback or pressure Outputs 2 Analog outputs: 0-10Vdc or 2-10Vdc selectable (2mA max.) 4 TRIAC outputs: on/off, pulse 0 or 24Vac (250 mA max.), or 2 floating outputs Power supply 22 to 26Vac 50/60Hz Power consumption 1VA Setpoint range 10ºC to 40ºC [50ºF to 104ºF] External sensor range -40ºC to 100ºC [-40ºF to 212ºF] Control accuracy Temperature: ±0.4ºC [0.8ºF] Proportional band 0.5ºC to 5ºC [1ºF to 10ºF] adjustable Electrical connection 0.8 mm 2 [18 AWG] minimum Operating temperature 0ºC to 50ºC [32ºF to 122ºF] Storage temperature -30ºC to 50ºC [-22ºF to 122ºF] Relative Humidity 5 to 95% non condensing Degree of protection of housing IP 30 (EN 60529) Weight 160 g. [0.36 lb] VAV Thermostat Controller Specification and Installation Instructions www.neptronic.com Page | 2 Description TROB24T4XYZ1 Dimensions A = 2.85” | 73mm B = 4.85” | 123mm C = 1.00” | 24mm D = 2.36” | 60mm E = 3.27” | 83mm Wiring We strongly recommend that all Neptronic products be wired to a separate grounded transformer and that transformer shall service only Neptronic products. This precaution will prevent interference with, and/or possible damage to incompatible equipment. Terminal Description Details 1 Common 2 Common 3 Common 4 24 Vac 5 24 Vac 6 TRIAC output 1 (TO1) Floating 1 (applies to pins 6-8 if set to “Flt” at step 8) TO1 = close TO2= open 7 ⃰ External 24 Vac for TO1 & TO2 (if JP2 set to B&C) (see Warning) 8 TRIAC output 2 (TO2) 9 TRIAC output 3 (TO3) Floating 2 (applies to pins 9-11 if set to “Flt” at step 16) TO3 = close TO4= open 10 ⃰ External 24 Vac for TO3 & TO4 (if JP1 set to B&C) (see Warning) ⃰ WARNING: Place the jumper on B&C if using external 24Vac. 11 TRIAC output 4 (TO4) 12 Analog input 1 (AI1) see step 32 and DIP switch (DS2 – 1&2) 13 Analog input 2 (AI2) see step 33 and DIP switch (DS2 – 3&4) 14 Analog input 3 (AI3) see step 34 and DIP switch (DS2 – 5&6) 15 Analog output 1 (AO1) see step 24 16 Analog output 2 (AO2) see step 25 17 A+ BACnet communications RS-485 (see JP6) 18 B- BACnet communications RS-485 (see JP6) Jumpers Jumpers Description JP1 Output Signal Selector TO3 and TO4 A&B = Internal: TRIAC output signal is linked to internal 24 Vac (same as thermostat) WARNING: Place the jumper on B&C if using external 24Vac. JP2 Output Signal Selector TO1 and TO2 B&C = External: TRIAC output signal is linked to external 24 Vac (different than thermostat) JP6 End of line A&B = No end of line B&C = 120 Ohm end of line (on the last TROB24T4XYZ1 of the RS-485 communication bus) DS1 - Mode Selector DIP Switches ON OFF 1 Mode Programming Mode Operation Mode 2 Not used - - 3 Not used - - DS2 – Analog Input Type Description AI1 (step 32) AI2 (step 33) AI3 (step 34) 1 2 3 4 5 6 Thermistor 10kΩ / dry contact ON OFF ON OFF ON OFF Analog 0-10Vdc (only if input set to “PrSd” or “PrSa” ) OFF ON OFF ON OFF ON O N 1 2 3 DS2 O N 1 2 3 4 5 6 J P 1 J P 2 JP6 ABCABC TRIAC Output Signal Selector A B C TO3 & TO4 (JP1)(JP2) TO1 & TO VAV Thermostat Controller Specification and Installation Instructions www.neptronic.com Page | 3 Mounting Instructions CAUTION: Remove power to avoid a risk of malfunction. A. Remove the captive screw that’s holding the base and the front cover of the unit together. B. Lift the front cover of the unit to separate it from the base. C. Pull all wires through the holes in the base. D. Secure the base to the wall using wall anchors and screws (supplied). Make the appropriate connections. E. Mount the control module on the base and secure using the screw. Programming Mode The Mode Selector DIP switch (DS1) must be set to the “ON” position (Programming Mode). Refer to Wiring on page 2. To exit, set DIP switch back to the “OFF” position (Operation Mode). All changes will be saved. Symbols used in this Manual Single Duct Temperature Heating Cooling TRIAC Output 1 TRIAC Output 2 TRIAC Output 3 TRIAC Output 4 Analog Output 1 Analog Output 2 Analog Input 1 Analog Input 2 Analog Input 3 Air Flow Night Set Back BACnet Communication Timer/Clock A E D C B C VAV Thermostat Controller Specification and Installation Instructions www.neptronic.com Page | 4 Setpoint and User Control Range: Offset: Increment: 10 to 40ºC [50 to 104ºF] Max. ± 5ºC 0.1ºC [0.2ºF] Compare the displayed temperature reading with a known value from a thermometer. To offset or calibrate the sensor, use the arrows key to set the desired temperature reading. This is useful for thermostats installed in areas where the temperature read is slightly different than the room’s actual temperature. For example, a thermostat placed right under the air diffuser. If the thermostat is set to use an external temperature sensor (EtS at Step 32, 33 or 34), the thermostat displays “OFF”. Default: Range: Increment: 15ºC [59ºF] 10 to 40ºC [50 to 104ºF] 0.5ºC [1.0ºF] In Operation mode, you cannot decrease the setpoint to less than the value set as the minimum user point. The minimum value is restricted by the maximum value set in Step 3. In other words, the value that is set as the minimum cannot be greater than the maximum value. Default: Range: Increment: 30ºC [86ºF] 10 to 40ºC [50 to 104ºF] 0.5ºC [1.0ºF] In Operation mode, you cannot increase the setpoint to more than the value set as the maximum user point. The maximum value is restricted by the minimum value set in Step 2. In other words, the value that is set as the maximum cannot be less than the minimum value. Default: Range: No (Unlocked) Yes / No If set to No, the user setpoint option is not locked and the user can adjust the desired setpoint temperature. If set to Yes, the user setpoint option is locked and the user cannot set the desired setpoint temperature. A lock symbol appears, to indicate that the setpoint is locked. Default: Range: Increment: 22ºC [72ºF] 10 to 40ºC [50 to 104ºF] 0.5ºC [1.0ºF] Set the desired temperature setpoint within the defined range. If the setpoint option was locked in Step 4, a lock symbol is displayed. The setpoint value is restricted by the minimum (Step 2) and maximum (Step 3) values. In other words, the setpoint should be within the minimum and maximum setpoint range. Default: Range: Auto (Automatic) Auto (Automatic), On (Cooling or Heating), Heat (Heating Only), Cool (Cooling Only) Select the control mode that you want to authorize to the user. To authorize all the available modes, select Auto (Automatic Mode). Default: Range: Yes (Enable) Yes / No If you select Yes, the user can set the unit to “Off” via the Control Mode (see page 16). If you select No, the “Off” selection does not appear in the Control Mode. VAV Thermostat Controller Specification and Installation Instructions www.neptronic.com Page | 5 TRIAC Output 1 (TO1) Default: Range: FLt (floating) FLt (floating), OnOf (on/off), PULs (pulsed) Select the desired signal from the available options. If you select FLt, ramp TO1 will be used for TO2. TO1 ramp will be set to close and TO2 will be set to open. If you select PULs, only the Heating 1 and Heating 2 ramps will be available at Step 9. Default: Range: Cr1 (Cooling ramp 1) Cr1, Cr2, Hr1, Hr2, COr, OFF Select the desired ramp from the available options. If you selected FLt at Step 8, ramp TO1 will be used for TO2. TO1 ramp will be set to close and TO2 will be set to open. If you selected PULs at Step 8, only Heating Ramp 1 and Heating Ramp 2 will be available. If you selected OnOf at Step 8, go to Step 12. If you selected PULs at Step 8, or OFF at this step, go to Step 13. Cooling Ramp 1 Cooling Ramp 2 Heating Ramp 1 Heating Ramp 2 Changeover Ramp Off Default: Range: Increment: 100 seconds 15 to 250 seconds 5 seconds This option appears only if you selected FLt (Floating) at Step 8. Set the desired value for floating time signal. Default: Range: Dir (Direct) Dir (Direct) or Rev (Reverse) Set the motor direction to either Direct (clockwise, 0 to 90°), or Reverse (counter clockwise, 90 to 0°). Go to Step 16. Default: Range: 40% of demand 20%, 40%, 60%, 80% This option appears if you selected OnOf at Step 8. Select the percentage at which you want TO1 to close (at % of demand of the ramp selected at Step 9). Contact automatically opens at 0% of the demand. VAV Thermostat Controller Specification and Installation Instructions www.neptronic.com Page | 6 TRIAC Output 2 (TO2) Default: Range: OnOf (on/off) OnOf (on/off), PULs (pulsed) Select the desired signal from the available options. If you select PULs, only the Heating 1 and Heating 2 ramps will be available at Step 14. Default: Range: Cr1 (Cooling ramp 1) Cr1, Cr2, Hr1, Hr2, COr, OFF Select the desired ramp from the available options. If you selected PULs at Step 13, only Heating Ramp 1 and Heating Ramp 2 will be available. If you selected PULs at Step 13, or OFF at this step, go to Step 16. Cooling Ramp 1 Cooling Ramp 2 Heating Ramp 1 Heating Ramp 2 Changeover Ramp Off Default: Range: 40% of demand 20%, 40%, 60%, 80% This option appears if you selected OnOf at Step 13. Select the percentage at which you want TO2 to close (at % of demand of the ramp selected at Step 14). Contact automatically opens at 0% of the demand. TRIAC Output 3 (TO3) Default: Range: OnOf (on/off) FLt (floating), OnOf (on/off), PULs (pulsed) Select the desired signal from the available options. If you select FLt, ramp TO3 will be used for TO4. TO3 ramp will be set to close and TO4 will be set to open. If you select PULs, only the Heating 1 and Heating 2 ramps will be available at Step 9. Default: Range: Hr1 (Heating ramp 1) Cr1, Cr2, Hr1, Hr2, COr, OFF Select the desired ramp from the available options. If you selected FLt at Step 16, ramp TO1 will be used for TO2. TO1 ramp will be set to close and TO2 will be set to open. If you selected PULs at Step 16, only Heating Ramp 1 and Heating Ramp 2 will be available. If you selected OnOf at Step 16, go to Step 20. If you selected PULs at Step 16, or OFF at this step, go to Step 21. Cooling Ramp 1 Cooling Ramp 2 Heating Ramp 1 Heating Ramp 2 Changeover Ramp Off VAV Thermostat Controller Specification and Installation Instructions www.neptronic.com Page | 7 Default: Range: Increment: 100 seconds 15 to 250 seconds 5 seconds This option appears only if you selected FLt (Floating) at Step 16. Set the desired value for floating time signal. Default: Range: Dir (Direct) Dir (Direct) or Rev (Reverse) Set the motor direction to either Direct (clockwise, 0 to 90°), or Reverse (counter clockwise, 90 to 0°). Go to Step 24. Default: Range: 40% of demand 20%, 40%, 60%, 80% This option appears if you selected OnOf at Step 16. Select the percentage at which you want TO3 to close (at % of demand of the ramp selected at Step 17). Contact automatically opens at 0% of the demand. TRIAC Output 4 (TO4) Default: Range: OnOf (on/off) OnOf (on/off), PULs (pulsed) Select the desired signal from the available options. If you select PULs, only the Heating 1 and Heating 2 ramps will be available at Step 22. Default: Range: Hr2 (Heating ramp 2) Cr1, Cr2, Hr1, Hr2, COr, OFF Select the desired ramp from the available options. If you selected PULs at Step 21, only Heating Ramp 1 and Heating Ramp 2 will be available. If you selected PULs at Step 13, or OFF at this step, go to Step 24. Cooling Ramp 1 Cooling Ramp 2 Heating Ramp 1 Heating Ramp 2 Changeover Ramp Off Default: Range: 40% of demand 20%, 40%, 60%, 80% This option appears if you selected OnOf at Step 21. Select the percentage at which you want TO2 to close (at % of demand of the ramp selected at Step 22). Contact automatically opens at 0% of the demand. VAV Thermostat Controller Specification and Installation Instructions www.neptronic.com Page | 8 Analog Outputs (AO1 and AO2) Default: Range: Cr1 (Cooling ramp 1) Cr1, Cr2, Hr1, Hr2, COr, OFF Select the desired ramp from the available options. Cooling Ramp 1 Cooling Ramp 2 Heating Ramp 1 Heating Ramp 2 Changeover Ramp Off Default: Range: Hr1 (Heating ramp 1) Cr1, Cr2, Hr1, Hr2, COr, OFF Select the desired ramp from the available options. If you selected OFF for AO1, go to Step 29. If you selected OFF for both AO1 and AO2, go to Step 32. Cooling Ramp 1 Cooling Ramp 2 Heating Ramp 1 Heating Ramp 2 Changeover Ramp Off Default: Range: Increment: 0.0 Volt 0.0 to 10.0 Volts 0.1 Volt This option does not appear if the signal ramp for AO1 is set to OFF (Step 24). Select the desired minimum voltage (“zero” value) for the AO1 ramp. The minimum value is restricted by the maximum value (Step 27). In other words, the minimum value should be less than the maximum value. Default: Range: Increment: 10.0 Volts 0.0 to 10.0 Volts 0.1 Volt This option does not appear if the signal ramp for AO1 is set to OFF (Step 24). Select the desired maximum voltage (“span” value) for the AO1 ramp. The maximum value is restricted by the minimum value (Step 26). In other words, the maximum value should not be less than the minimum value. Default: Range: Increment: 0% 0 to 100% 5% This option does not appear if the signal ramp for AO1 is set to OFF (Step 24). Select the desired minimum position of the AO1 analog output. Default: Range: Increment: 0.0 Volt 0.0 to 10.0 Volts 0.1 Volt This option does not appear if the signal ramp for AO2 is set to OFF (Step 25). Select the desired minimum voltage (“zero” value) for the AO2 ramp. The minimum value is restricted by the maximum value (Step 30). In other words, the minimum value should be less than the maximum value. VAV Thermostat Controller Specification and Installation Instructions www.neptronic.com Page | 9 Default: Range: Increment: 10.0 Volts 0.0 to 10.0 Volts 0.1 Volt This option does not appear if the signal ramp for AO2 is set to OFF (Step 25). Select the desired maximum voltage (“span” value) for the AO2 ramp. The maximum value is restricted by the minimum value (Step 29). In other words, the maximum value should not be less than the minimum value. Default: Range: Increment: 0% 0 to 100% 5% This option does not appear if the signal ramp for AO2 is set to OFF (Step 25). Select the desired minimum position of the AO2 analog output. Analog Inputs (AI1 to AI3) Default: Range: OFF OFF, SENs, NoCl, NoHt, EtS, nSb, PrSd, PrSa Select the input signal type for AI1 (analog input 1). If NoCL is selected: heating mode activates when the contact is closed and cooling mode activates when the contact is opened. If NoHt is selected: cooling mode activates when the contact is closed and heating mode activates when the contact is opened. If SENs is selected: heating mode activates when the temperature read by the external sensor is above the Changeover Setpoint and cooling mode activates when the temperature read by the external sensor is below the Changeover Setpoint (see Step 36). If PrSd or PrSa is selected in a pressure independent VAV system, you must perform a calibration by using the Air Flow Program Mode (Operation Mode) on page 16. Off External Changeover Sensor 10kΩ Changeover Contact Normally Cool Changeover Contact Normally Heat External Temperature Sensor 10kΩ Differential Pressure Sensor (0-10Vdc, PrSd=1-V if P=1) Velocity Pressure Sensor (0-10Vdc, PrSa 10V=Vnom) Night Setback Contact Default: Range: OFF OFF, SENs, NoCl, NoHt, EtS, nSb, PrSd, PrSa Select the input signal type for AI2 (analog input 2). Same options as in Step 32. The AI1 input signal has priority over AI2. If you select the same input signal type as AI1, AI2 will not be functional. Default: Range: OFF OFF, SENs, NoCl, NoHt, EtS, nSb, PrSd, PrSa Select the input signal type for AI3 (analog input 3). Same options as in Step 32. The AI1and AI2 input signals have priority over AI3. If you select the same input signal type as AI1 or AI2, AI3 will not be functional. Next >