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Networkable Fan Coil Controller 

Specification and Installation Instructions 

 

www.neptronic.com 

 

Page | 19

 

Temperature and Humidity (Thermostats with Temperature and Humidity Sensors) 

The thermostat displays the temperature reading for 8 seconds and then displays the humidity reading for 2 seconds. If the sensor 
is disconnected or short circuited, the unit displays the sensor's limits. To toggle the temperature scale between ºC and ºF,  press 
both the 

 and 

 keys for 3 seconds. 

 

To access the Humidity setpoint, press the [

 /

] button for 5 seconds. The humidity setpoint will be displayed for 5 seconds. 

To adjust the setpoint, press the 

 and 

 keys while the setpoint is displayed. The unit will return to normal mode  if you do not 

press any key for 3 seconds. The changed values will be saved automatically.  

Control Mode 

To access the Control Mode, press the [

 /

 

] key. The Control Mode  appears for 5 seconds. Press the [

 /

 

] key to 

scroll through the following control modes. These options can vary depending on the options selected. 
 

 

Auto (Automatic Cooling or Heating)  

 

OFF (if it is not disabled in Programming Mode) 

 

Cooling only (on, with cooling symbol) 

 

Heating only (on, with heating symbol) 

 

Fan only (on, with fan symbol) 

Fan Speed Selection Mode 

To  access  the  Fan  Speed  selection  mode,  press  the  [

 /

]  key.  The  mode  appears  for  5  seconds.  These  options  can  vary 

depending  on  the  fan speed signal  and auto  mode settings.  If  in  No  Occupancy  mode,  the  [

 /

]  button  now  serves  as  the 

override button.  
 

 

Automatic speed. Available only if enabled in Programming Mode. 

 

Low speed 

 

Medium speed 

 

High speed 

 

Off. Off is not selectable by the user, it appears only if the "Control Mode" is "Off" and it indicates that the user can not change 
the speed of the fan.  

Night Setback (NSB) 

This function is only available if you’ve set DI3 to 

nSb

 (Night setback contact). If the DI3 contact is triggered, the thermostat enters 

NSB Mode (the   symbol appears) and uses the NSB setpoints defined in Programming Mode.

 

Press any key to override NSB for 

the delay defined in Programming Mode (default: 120 minutes). The   symbol flashes to indicate that the NSB mode is overridden 
(during this time the standard setpoints are used).  
 
If the NSB Mode was set to OFF, all outputs will be off for the duration of the period and cannot be overridden. 

 

Occupancy Mode 

This  function  is  only  available  if  you’ve  set  DI3  to 

Occ

  (occupancy  mode).  If  the  DI3  contact  is  triggered,  the  thermostat  enters 

Occupancy Mode (the   symbol appears) and uses the NoOcc setpoints defined in Programming Mode.

 

If  not  locked,  no  occupancy  mode  can  be  overridden  for  a  period  by  pressing  the  [

 /

]  button.  Each  time  you  press  the 

[

 /

] button, 15 minutes are added to the override (up to a maximum defined in program mode).  

Press the fan [

 /

button until “0” is displayed to disable the override. The   icon will flash and the remaining override time 

will be displayed in minutes

.

 

Set Time and Date 

1.  Ensure that JP1 on the thermostat is set to run. 
2.  Press and hold the [

 /

 

] button for 5 seconds. 

3.  Use the arrow keys to set the desired value. Press the [

 /

] button to save and go to the next step. Press the  

[

 /

 

] button to go to the previous step without saving. 

 

Summary of Contents for TFL24

Page 1: ...floating pulse or modulating 0 10 Vdc Cool Heat Reheat Reheat with fan Changeover Fan Humidify and Dehumidify by cooling Features Built in configurable fan coil algorithms Up to 10 inputs and 15 outputs configurable Select direction on digital inputs and all outputs Selectable proportional control band and dead band Selectable fan speed contacts No occupancy and NSB override Independent cool heat ...

Page 2: ...ature 0ºC to 50ºC 32ºF to 122ºF Storage temperature 30ºC to 50ºC 22ºF to 122ºF Relative Humidity 5 to 95 non condensing Enclosure protection IP 30 EN 60529 Weight 635 g 1 4 lb Dimensions A 6 30 160mm B 5 00 126mm C 2 25 57mm Thermostat Specifications Description TFL24 and TDU Series Temperature Sensor TFL24 and TDU Setpoint Range 10ºC to 40ºC 50ºF to 104ºF Control Accuracy 0 5ºC 0 9ºF 22ºC 71 6ºF ...

Page 3: ... Temp RH CO2 PIR Color TDU10 100 grey LCD white enclosure TDU10 101 TDU10 102 TDU10 103 TDU10 104 TDU10 105 TDU10 106 TDU10 107 TDU10 Series Model Temp RH CO2 PIR Color TDU40 100 black LCD black enclosure TDU40 101 TDU40 102 TDU40 103 TDU40 104 TDU40 105 TDU40 106 TDU40 107 TDU40 Series Model Temp RH CO2 PIR Color TDU70 100 black LCD white enclosure TDU70 101 TDU70 102 TDU70 103 TDU70 104 TDU70 10...

Page 4: ...Saving Mode NSB OCC Schedule Time ppm Parts Per Million C F RH ºC Celsius Scale ºF Fahrenheit Scale RH Humidity A Automatic Mode Cooling Heating Fan Humidify De humidify Mounting Instructions TFL24 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...

Page 5: ...ostat using the screw supplied BACnet or Modbus Address DIP Switch DS2 MAC address for communication are selectable by DIP switch using binary logic If you do not change device instance in program mode it will be automatically modified according to the MAC address Note Avoid using addresses above 246 when selecting Modbus MAC address MAC Address DS 1 1 DS 2 2 DS 3 4 DS 4 8 DS 5 16 DS 6 32 DS 7 64 ...

Page 6: ... 10Vdc configurable min max Direct or reverse 4 analog inputs config 0 10Vdc or 10kOhms via DIP switch NSB or OCC Sensor Power Input 24 or 240Vac Applies to all relays and digital outputs 3 speed fan 4 3 2 1 RET DO4 3A 4 digital outputs config Cool heat reheat changeover humidify dehumidify by cooling Configurable close open percent Direct or reverse LD3 TX LD4 RX 4 TRIAC outputs config Cool heat ...

Page 7: ...r the action button or the button used to access the menus and save changes is different in the thermostats Use the following menu overviews with the appropriate action button as per your thermostat Action Buttons on Thermostat Action Button Task TFL24 TDU Press to access the programming menus and save any changes Press to return to the previous step without saving Mode Selector Jumper RUN Operati...

Page 8: ...Networkable Fan Coil Controller Specification and Installation Instructions www neptronic com Page 8 Analog Inputs Menu Overview 1 of 8 AI1 and AI3 ...

Page 9: ...Networkable Fan Coil Controller Specification and Installation Instructions www neptronic com Page 9 Digital Inputs Menu Overview 2 of 8 DI1 to DI4 ...

Page 10: ...Networkable Fan Coil Controller Specification and Installation Instructions www neptronic com Page 10 TRIAC Outputs Menu Overview 3 of 8 TO1 to TO4 ...

Page 11: ...Networkable Fan Coil Controller Specification and Installation Instructions www neptronic com Page 11 Analog Outputs Menu Overview 4 of 8 AO1 to AO4 ...

Page 12: ...Networkable Fan Coil Controller Specification and Installation Instructions www neptronic com Page 12 Digital Outputs Menu Overview 5 of 8 DO1 to DO4 ...

Page 13: ...Networkable Fan Coil Controller Specification and Installation Instructions www neptronic com Page 13 Settings Menu Overview 6 of 8 Temp Fan Settings and Ramps ...

Page 14: ...Networkable Fan Coil Controller Specification and Installation Instructions www neptronic com Page 14 Network and Calendar Menu Overview 7 of 8 Network Time and Options ...

Page 15: ...le Fan Coil Controller Specification and Installation Instructions www neptronic com Page 15 Humidity Menu Overview 8 of 8 Humidity Only available when a humidity sensor thermostat is connected to the controller ...

Page 16: ...nd Fan speed Low Low Fan speed Low Fan speed Low Medium Fan speed Medium Fan speed Medium High Fan speed High Fan speed High Cool Auto Speed Fan speed cool demand Fan speed Low Low Fan speed Low Fan speed Low Medium Fan speed Medium Fan speed Medium High Fan speed High Fan speed High Auto H C Auto Speed Fan speed heat cool demand Fan speed Low Low Fan speed Low Fan speed Low Medium Fan speed Mediu...

Page 17: ...Menu b Password 637 Network Settings Menu 4 If you enter the wrong password the thermostat displays Eror and returns to Operation Mode The thermostat will return to normal mode if you navigate through the entire menu and do not make any selection or if you do not press any key for 5 minutes The changed values will be saved automatically Menu 372 Sensor Offset Menu 637 Network Settings Reset to Fac...

Page 18: ... press both the and keys for 3 seconds To display the setpoint press the or key twice The setpoint appears for 5 seconds To adjust the setpoint press the arrow keys while the temperature is displayed If the setpoint adjustment has been locked the lock symbol appears C Actual demand Room temperature Appears if in Night Setback NSB or Occupancy OCC mode Flashes if overridden by user RH Alternates be...

Page 19: ...n Automatic speed Available only if enabled in Programming Mode Low speed Medium speed High speed Off Off is not selectable by the user it appears only if the Control Mode is Off and it indicates that the user can not change the speed of the fan Night Setback NSB This function is only available if you ve set DI3 to nSb Night setback contact If the DI3 contact is triggered the thermostat enters NSB...

Page 20: ... need to find the nearest Neptronic authorized distributor please consult www neptronic com 400 Lebeau blvd Montreal Qc H4N 1R6 Canada www neptronic com Toll free in North America 1 800 361 2308 Tel 514 333 1433 Fax 514 333 3163 Customer service fax 514 333 1091 Monday to Friday 8 00am to 5 00pm Eastern time ...

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