
Networkable Dual Duct VAV Controller
Specification and Installation Instructions
www.neptronic.com EVCBM –Dual Duct Page | 16
Power Up
Upon power up, the LCD illuminates and all segments appear for 2 seconds. The thermostat then displays its current version of the
thermostat for 2 seconds followed by the current version of the controller for 2 seconds. Pressing any key on the thermostat illuminates
the LCD for 4 seconds.
CO2(Thermostats with CO2 Sensors)
If enabled via the configuration menu, the thermostat displays the CO2reading on the first line above the temperature reading. If CO2
display is enabled, the time will not be displayed.
Temperature Display and Setpoint
If enabled in the "Display Info" menu (see Settings –Menu (3 of 4) | Temp, Motor, Settings and Ramps on page 10), the thermostat
displays the temperature reading. If the sensor is disconnected or short circuited, then the unit displays the sensor's limit. To toggle the
temperature scale between ºC and ºF, press the key. 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 “Setpnt Locked”, the lock symbol appears.
Humidity
If enabled in the "Options" menu (see Settings –Menu (4 of 4) | Network, Time and Options on page 11), 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,
then the unit displays the sensor's limit.
Airflow and Air Supply Temperature
Press and hold the [ / ] key for 5 seconds and use the arrow keys to view the “airflow 1”(master), “airflow 2”(slave), “airflow
Setpnt 1" (master), “airflow Setpnt 2" (slave), and “air Supply Temp”. After 5 seconds without any action, the thermostat returns to
operation mode. The air supply temperature appears only if analog input AI1 or AI2 are configured with the AST option.
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 in "Temp Control Mode" and "Enable
OnOff Control Mode".
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)
Night Setback (NSB) or Occupancy Mode
This function is only available if you set DI1 to nSb (Night setback contact) or Occ (occupancy mode). If the DI1 contact is triggered, the
thermostat enters NSB or No Occupancy Mode (the symbol appears) and uses the NSB or OCC heating and cooling setpoints.
If not locked, you can override the night setback or no occupancy mode for a predetermined period by pressing any of the 4 keys.
During the override period the symbol will flash. If the symbol does not flash, the override period is finished or the night setback or
no occupancy override has been locked in programming mode.
Set Time and Date
1. Ensure that JP1 on the thermostat is set to Run.
2. Press and hold the key for 5 seconds
3. Use the arrow keys to set the desired value. Press the [ / ] key to save and got to the next step. Press the key to go
to the previous step without saving.