Neptronic TRO24-EXT1 User manual

VAV Thermostat Controller
Specification and Installation Instructions
TRO24-EXT1-Ext Setpnt-140922-ESA Page | 1
Model
TRO24-EXT1
Extended Setpoint Range
Description
The TRO24-EXT1 is a combination controller and thermostat .
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
•Extended setpoint range
•Manual night set back 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
TRO24-EXT1
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
TRO24-EXT1
Inputs
3 Universal analog inputs: 0-10Vdc, Thermistor (10k Type 3), or digital input (dry contact)
Available for sensors: external temperature, changeover, night set back 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
-30ºC to 90ºC [-22ºF to 194ºF] with external sensor
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 mm2 [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
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Description
TRO24-EXT1
Dimensions
A = 2.85” | 73mm
B = 4.85” | 123mm
C = 1.00” | 24mm
D = 2.36” | 60mm
E = 3.27” | 83mm
A
B
C
D
E
ºF / º C
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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
TB1
ON
1 2 3
DS1
DS2
ON
1 2 3 4 5 6
JP1 JP2
A B C A B C
TRIAC Output Signal Selector
Connector strip
(TB1)
Mode Selector
(DS1)
Temperature
Sensor
Analog Input Type
(DS2)
TO3 & TO4 (JP1) (JP2) TO1 & TO2
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)
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)
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
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)
B&C = External: TRIAC output signal is linked to external 24 Vac (different than thermostat)
JP2
Output Signal Selector
TO1 and TO2
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

VAV Thermostat Controller
Specification and Installation Instructions
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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.
A
E
D
C
B
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
Timer/Clock

VAV Thermostat Controller
Specification and Installation Instructions
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Setpoint and User Control
1. “Inside Temp Sensor Offset”
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”.
2. “Adjust Minimum User Setpnt”
0ºC [32ºF]
-30 to 90ºC [-22ºF to 194ºF]
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.
3. “Adjust Maximum User Setpnt”
Default:
Range:
Increment:
45ºC [113ºF]
-30 to 90ºC [-22ºF to 194ºF]
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.
4. “User Setpnt Locked”
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.
5. “Adjust Intern Setpnt”
Default:
Range:
Increment:
22ºC [72ºF]
-30 to 90ºC [-22ºF to 194ºF]
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 in the minimum and maximum setpoint range.
6. “Adjust Temper Control Mode”
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).
7. “Enable On Off Control 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 14). If you select No, the “Off” selection does
not appear in the Control Mode.

VAV Thermostat Controller
Specification and Installation Instructions
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TRIAC Output 1 (TO1)
8. “Select TO1 Output Signal”
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.
9. “Select TO1 Signal Ramp”
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
10. “Set Floating Time in Seconds”
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.
11. “Select Motor Direct Reverse”
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.
12. “Select TO1 Close Percent”
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.
TRIAC Output 2 (TO2)
13. “Select TO2 Output Signal”
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.

VAV Thermostat Controller
Specification and Installation Instructions
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14. “Select TO2 Signal Ramp”
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
15. “Select TO2 Close Percent”
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)
16. “Select TO3 Output Signal”
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.
17. “Select TO3 Signal Ramp”
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
18. “Set Floating Time in Seconds”
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.
19. “Select Motor Direct Reverse”
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.

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Specification and Installation Instructions
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20. “Select TO3 Close Percent”
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)
21. “Select TO4 Output Signal”
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.
22. “Select TO4 Signal Ramp”
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
23. “Select TO4 Close Percent”
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.
Analog Outputs (AO1 and AO2)
24. "Select AO1 Analog Ramp”
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

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Specification and Installation Instructions
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25. "Select AO2 Analog Ramp”
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
26. “Min Vdc Analog AO1 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 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.
27. “Max Vdc Analog AO1 Output”
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.
28. “Min Pos AO1 Output Percent”
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.
29. Min Vdc Analog AO2 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.
30. “Max Vdc Analog AO2 Output”
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.
31. “Min Pos AO2 Output Percent”
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.

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Analog Inputs (AI1 to AI3)
32. “Select AI1 Input Signal”
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 12.
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 Set Back
Contact
33. “Select AI2 Input Signal”
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.
34. “Select AI3 Input Signal”
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.
35. “Extern Temper Sensor Offset”
Range:
Offset:
Increment:
-30 to 90ºC [-22 to 194ºF]
Max. ± 5ºC
0.1ºC [0.2ºF]
This option appears if you’ve set one of the analog inputs to EtS (External temperature sensor) in Step 32, 33 or 34. When the
thermostat is connected to the appropriate analog input (AI1, AI2, or AI3), the display shows the temperature read by the
external temperature sensor. Adjust the offset by comparing it with a known value (e.g. thermometer). If the sensor is not
connected or short circuited, the display is blank “Error“.

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36. “CH Over SetPnt Temper”
Default:
Range:
Increment:
24ºC [82ºF]
-30 to 90ºC [-22 to 194ºF]
0.5ºC [1ºF]
This option appears if you’ve set one of the analog inputs to SENs (External changeover sensor) in Step 32, 33 or 34. Set the
desired changeover temperature setpoint. Please note that the 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.
37. “NSB Delay Overide Minutes”
Default:
Range:
Increment:
120 minutes
0 to 180 minutes
15 minutes
This option appears if you’ve set one of the analog inputs to nSb (Night set back contact) in Step 32, 33 or 34. When in Night
Set Back mode, the end user can override the Night Set Back setpoints for the duration of this delay (refer to Operation Mode
on page 14). To disable Night Set Back override, set the delay to 0. The moon symbol is displayed to indicate “Night Set
Back” mode.
38. “Night Setback Heating Setpnt”
Default:
Range:
Increment:
16ºC [61ºF]
-30 to 90ºC [-22 to 194ºF]
0.5ºC [1ºF]
This option appears if you’ve set one of the analog inputs to nSb (Night set back contact) in Step 32, 33 or 34. Set the heating
setpoint that will be used when the system is “Night Set Back” Mode. The setpoint value is restricted by the “Night Setback
Cooling Setpnt” value (Step 39). The moon and heating symbols are also displayed.
39. “Night Setback Cooling Setpnt”
Default:
Range:
Increment:
28ºC [82ºF]
-30 to 90ºC [-22 to 194ºF]
0.5ºC [1ºF]
This option appears if you’ve set one of the analog inputs to nSb (Night set back contact) in Step 32, 33 or 34. Set the cooling
setpoint that will be used when the system is “Night Set Back” Mode. The setpoint value is restricted by the “Night Setback
Heating Setpnt” value (Step 38). The moon and heating symbols are also displayed.
40. “Pressur Indepen Output”
Default:
Range:
FLt.1 (floating 1)
FLt.1, FLt.2, ANL.1, ANL.2
This option appears if you’ve set one of the analog inputs to either PrSd or PrSa (pressure sensor) in Step 32, 33 or 34. Select
which output is affected by pressure (connected to the actuator). These selections may vary based on options selected at Step
8 and 16.
Floating 1
(TO1 & TO2)
Floating 2
(TO3 & TO4)
Analog 1
(AO1)
Analog 2
(AO2)
41. “Control Ramp CH Over”
Default:
Range:
Increment:
2.0ºC [4ºF]
0.5 to 5.0ºC [1 to 10ºF]
0.5ºC [1ºF]
Select the desired proportional band value of the changeover ramp. The cooling and heating symbols are also displayed.
42. “Control Ramp 1 Heating”
Default:
Range:
Increment:
2.0ºC [4ºF]
0.5 to 5.0ºC [1 to 10ºF]
0.5ºC [1ºF]
Select the desired proportional band value of the heating ramp 1. The heating symbol is also displayed.

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43. “Control Ramp 2 Heating”
Default:
Range:
Increment:
2.0ºC [4ºF]
0.5 to 5.0ºC [1 to 10ºF]
0.5ºC [1ºF]
Select the desired proportional band value of the heating ramp 2. The heating symbol is also displayed.
44. “Control Ramp 1 Cooling”
Default:
Range:
Increment:
2.0ºC [4ºF]
0.5 to 5.0ºC [1 to 10ºF]
0.5ºC [1ºF]
Select the desired proportional band value of the cooling ramp 1. The cooling symbol is also displayed.
45. “Control Ramp 2 Cooling”
Default:
Range:
Increment:
2.0ºC [4ºF]
0.5 to 5.0ºC [1 to 10ºF]
0.5ºC [1ºF]
Select the desired proportional band value of the cooling ramp 2. The cooling symbol is also displayed.
46. “Control Dead Band CH Over”
Default:
Range:
Increment:
0.3ºC [0.6ºF]
0 to 5.0ºC [0 to 10ºF]
0.1ºC [0.2ºF]
Select the desired dead band value of the changeover ramp. The cooling and heating symbols are also displayed.
47. “Control Dead Band 1 Heating”
Default:
Range:
Increment:
0.3ºC [0.6ºF]
0 to 5.0ºC [0 to 10ºF]
0.1ºC [0.2ºF]
Select the desired dead band value of the heating ramp 1. The heating symbol is also displayed.
48. “Control Dead Band 2 Heating”
Default:
Range:
Increment:
0.3ºC [0.6ºF]
0 to 5.0ºC [0 to 10ºF]
0.1ºC [0.2ºF]
Select the desired dead band value of the heating ramp 2. The heating symbol is also displayed.
49. “Control Dead Band 1 Cooling”
Default:
Range:
Increment:
0.3ºC [0.6ºF]
0 to 5.0ºC [0 to 10ºF]
0.1ºC [0.2ºF]
Select the desired dead band value of the cooling ramp 1. The cooling symbol is also displayed.
50. “Control Dead Band 2 Cooling”
Default:
Range:
Increment:
0.3ºC [0.6ºF]
0 to 5.0ºC [0 to 10ºF]
0.1ºC [0.2ºF]
Select the desired dead band value of the cooling ramp 2. The cooling symbol is also displayed.
51. “Cooling Anti Cycle Minutes”
Default:
Range:
Increment:
2 minutes
0 to 15 minutes
1 minute
To protect the compressor, set the delay in minutes before activating or reactivating the cooling contact.
52. “Adjust Intgral Time in Seconds”
Default:
Range:
Increment:
0 seconds
0 to 250 seconds
5 seconds
Set the desired value for the integration factor compensation.

VAV Thermostat Controller
Specification and Installation Instructions
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Air Flow Program Mode (Operation Mode)
This menu is accessible through normal operation mode.
1. The Mode Selector DIP switch (DS1) must be set to the “OFF” position (Operation Mode). Refer to Wiring on page 2.
2. Press the and
ºF / º C
keys for 5 seconds. The “Enter Password” screen appears.
3. Enter the password (637) within 1 minute. Use the and arrow keys to increase or decrease the value and the
buttons to toggle between the digits. If you enter the wrong password, the thermostat displays “Eror” and returns to Operation
Mode.
4. Use the same menu operations as described in Programming Mode on page 3.
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.
53. “Inside Temp Sensor Offset”
Range:
Offset:
Increment:
-30 to 90ºC [-22 to 194ºF]
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 of programming mode on page 9), the
thermostat displays “OFF”.
54. “Extern Temper Sensor Offset”
Range:
Offset:
Increment:
-30 to 90ºC [-22 to 194ºF]
Max ± 5ºC
0.1ºC [0.2ºF]
This option appears if you’ve set one of the analog inputs to EtS (External temperature sensor) in Step 32, 33 or 34 of
programming mode on page 9. When the thermostat is connected to the appropriate analog input (AI1, AI2, or AI3), the display
shows the temperature read by the external temperature sensor. Adjust the offset by comparing it with a known value (e.g.
thermometer). If the sensor is not connected or short circuited, the display is blank “Error“.
55. “Pressure Filter Time in Seconds”
Default:
Range:
Increment:
2 seconds
1 to 10 seconds
1 second
This option appears if you have set one of the analog inputs to PrSd or PrSa in Step 32, 33, or 34. Set the time in seconds of
the numeric filter applied to the pressure analog input. The numeric filter stabilizes the reading and slows down the answer of
the system.
56. “air flow Intgral time in Seconds”
Default:
Range:
Increment:
0 minutes
0 to 60 minutes
1 minute
Set the time in minutes for the integration factor compensation.
57. “Adjust Airflow KFactor Vnom”
Default:
Range:
Increment:
1200
100 to 9995
5
Set the value of the K-Factor or the V nominal according to your pressure sensor selection (PrSd or PrSa in Step 32, 33 or 34
or programming mode on page 9).
•If Differential Pressure Sensor (PrSd): V = k√∆P when ∆P=1 (10.00V)
•If Velocity Pressure Snesor (PrSa): Vnom =10.00V
58. “Minimum Cooling Airflow”
Default:
Range:
Increment:
100
0 to “maximum cooling airflow”
5
Select the desired value of the minimum airflow in cooling. The minimum value is restricted by the maximum value (Step 59).

VAV Thermostat Controller
Specification and Installation Instructions
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59. “Maximum Cooling Airflow”
Default:
Range:
Increment:
1000
“minimum cooling airflow” to “K-Factor or V nominal”
5
Select the desired value of the maximum airflow in cooling. The maximum value is restricted by the minimum value (Step 58).
60. “Minimum Heating Airflow”
Default:
Range:
Increment:
100
0 to “maximum heating airflow”
5
Select the desired value of the minimum airflow in heating. The minimum value is restricted by the maximum value (Step 61).
61. “Maximum Heating Airflow”
Default:
Range:
Increment:
1000
“minimum heating airflow” to “K-Factor or V nominal”
5
Select the desired value of the maximum airflow in heating. The maximum value is restricted by the minimum value (Step 60).
62. “Enable Airflow Balance”
Default:
Range:
No
No, Yes
If you do not need to balance system, select No. This will exit the Air Flow and BACnet Setup menu and return to operation
mode. If you want to balance system, select Yes. In this case, continue to the next step and if no action occurs for 30 minutes,
changed values will be saved and the thermostat will exit the Air Flow Setup menu and return to operation mode.
63. “Minimum Airflow”
Range:
Offset:
Increment:
0 to “K-Factor or V nominal”
Max. ± ½ value
1
The thermostat displays the minimum airflow detected by the pressure sensor. The thermostat will send a signal to the actuator
to close the VAV box at minimum airflow. When the value on thermostat is stable, adjust the calibration of the sensor by
comparing it with the reading on a manometer or a balometer. If you can’t stabilize the system, you may need to increase the
filter time value (Step 55).
64. “Maximum Airflow”
Range:
Offset:
Increment:
0 to “K-Factor or V nominal”
Max. ± ½ value
1
The thermostat displays the maximum airflow detected by the pressure sensor. The thermostat will send a signal to the
actuator to open the VAV box at maximum airflow. When the value on thermostat is stable, adjust the calibration of the sensor
by comparing it with the reading on a manometer or a balometer. If you can’t stabilize the system, you may need to increase
the filter time value (Step 55). Return to Step 62. To exit the Air Flow Setup mode, set the Mode Selector DIP switch (DS1)
must be set to "ON" position (Programming Mode).

VAV Thermostat Controller
Specification and Installation Instructions
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Operation Mode
The Mode Selector DIP switch (DS1) must be set to the “OFF” position (Operation Mode). Refer to Wiring on page 2.
Press to toggle
between °C and °F
Actual
temperature
Actual
demand
C
/
°F/°C
Appears if setpoint
adjustment is locked
Change setpoint value
Operation Mode
C
/
°F/°C
/
°F/°C
/
°F/°C
Press once to
display control mode
Press for 5 sec.
to display air flow
(if using pressure sensors)
Exits after 5 sec.Exits after 5 sec.Exits after 3 sec.
Press twice to
display setpoint
Setpoint value
Press to change mode:
- Auto
-Off
- Cool only
- Heat only
Appears if in Night Set Back (NSB) mode.
Flashes if NSB was overridden by user.
Power Up
Upon power up, the LCD illuminates and all segments appear for 2 seconds. The thermostat then displays its current version for 2
seconds.
LCD Backlight
Pressing any key on the thermostat illuminates the LCD for 4 seconds.
Temperature
The thermostat always displays the temperature reading. If the sensor is disconnected or short circuited, then “OFF” and “- - -” are
displayed. To toggle the temperature scale between ºC and ºF, press the
ºF / º C
key.
Setpoint
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 (Step 4 on page 4), , the lock symbol
appears.
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 at Steps 6 and 7 on page 4.
•Auto (Automatic Cooling or Heating)
•Cooling only (on)
•Heating only (on)
•OFF
Night Set Back (NSB)
This function is only available if you’ve set one of the analog inputs to nSb (Night set back contact) in Step 32, 33 or 34 on page 9.
If the NSB contact is triggered, the thermostat enters NSB Mode (the symbol appears) and uses the NSB setpoints defined in
Steps 38 and 39 on page 10. The user can press any key to override NSB for the delay defined at Step 37 on page 10. The
symbol flashes to indicate that the NSB mode is overridden (during this time the standard setpoints are used.
Air Flow
This function is only available if you’ve set one of the analog inputs to either PrSd or PrSa (pressure sensor) in Step 32, 33 or 34 on
page 9. Press and hold the key for 5 seconds to display the airflow value.

VAV Thermostat Controller
Specification and Installation Instructions
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Notes
Recycling at end of life: please return this product to your Neptronic local distributor for recycling. If you 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.: [phone]
Fax: [phone]
Customer service fax: [phone]
Monday to Friday: 8:00am to 5:00pm (Eastern time)