VAV Thermostat Controller
Specification and Installation Instructions
TRO24-EXT1-Ext Setpnt-140922-ESA
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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 intern
al 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 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]
