Neptronic TRO24-EXT1 Installation Instructions Manual

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

Technical Specifications

Description
Inputs
Outputs
Power supply
Power consumption
Setpoint range
External sensor range
Control accuracy
Proportional band
Electrical connection
Operating temperature
Storage temperature
Relative Humidity
Degree of protection of housing
Weight
TRO24-EXT1-Ext Setpnt-140922-ESA

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.
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
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
22 to 26Vac 50/60Hz
1VA
-30ºC to 90ºC [-22ºF to 194ºF] with external sensor
-40ºC to 100ºC [-40ºF to 212ºF]
Temperature: ±0.4ºC [0.8ºF]
0.5ºC to 5ºC [1ºF to 10ºF] adjustable
2
0.8 mm [18 AWG] minimum
0ºC to 50ºC [32ºF to 122ºF]
-30ºC to 50ºC [-22ºF to 122ºF]
5 to 95% non condensing
IP 30 (EN 60529)
160 g. [0.36 lb]
VAV Thermostat Controller
Specification and Installation Instructions
TRO24-EXT1
TRO24-EXT1
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