XCSpec Air Quality Display

Demand Control Ventilation (DCV) controllers integrate with the building ventilation system to modulate the amount of outdoor air based on input from a CO2 sensor. They can be used to save energy during low occupancy and improve indoor air quality during high occupancy.

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XCSpec Air Quality Display

Ventilation system controller with economizer and CO2-based demand control ventilation capabilities. The device may be configured and monitored wirelessly with XCSpec’s Mini Access Point.

Hub Highlights:

LED status indicators, information and commissioning available through integrated WiFi.
WiFi connection but no supported building management system (BMS) protocols.
Poor performance under Hub simulated occupancy profiles.

Last Edited on: Jul 26, 2022

Model Number	Air Quality Display
Power Supply	24 VAC, 50/60 Hz
CO2 Sensor Compatibility	Only compatible with XCSpec sensors
Controller CO2 Sensor Input Signal Types	Wifi to cloud-based interface (requires gateway)
Actuator Signal Output Types	0-10 VDC
Nominal Power Consumption	Not specified. Independent testing showed average consumption of 15VA.
Economizer Control Options	None
Other Inputs	None
Other Outputs	None
Controller Configuration Method	Wifi with proprietary software
Controller Response to CO2 Sensor Failure/Power Loss	The control logic stops running. DCV settings are maintained in memory and restored when power is restored.
Manufacturer Reported Control Algorithm Details	None found
Supported Communication Protocols	Wi-Fi communication (requires gateway)

Last Edited on: Jul 26, 2022

Date of Test	September 2021
Number of Tests	6
Setting	N/A
Average Fraction of Time Underventilated	0%
Average Elevated CO2 During Underventilation (ppm)	N/A
Average Fraction of Time Overventilated	79%
Average Lowered CO2 During Overventilation (ppm)	-261
Average Fraction of Time At Target Ventilation Rate	21%
DCVC Full Results	See Table

Last Edited on: Jul 26, 2022

User interface

Describe interface for commissioning.

Web interface

User interface

Describe the settings for the device.

Minimum damper position, maximum damper position, setpoint

User interface

Does the controller have alarm capability to notify facilities of a problem? If yes, describe.

Yes - Alarm information is stored on the device. Alarm flashes LED on device.

Installation

Does the controller require specialized software for installation? If yes, describe

Yes - Requires logging into a local WiFi portal to configure

Installation

Does the controller require specialized training for installation? If yes, describe

Installation

What is the resolution for CO2 setpoint?

Any interval

Installation

How is damper position specified?

Percentage

Installation

Can the CO2 sensor be universal or manufacturer specific?

Manufacturer specific

Installation

Can you specify sensor calibration to correct for sensor error in the DCV system controller?

The sensor can be forced to calibrate, auto-calibration can be turned on and off

Integration capabilities

Can the controller interface (beyond dry contacts) with a building automation system (BAS)? If yes, describe if integration capabilities are vendor specific.

Yes - Through a 0-10V output or via the XC Spec DCV Pro controller

Integration capabilities

If the controller can interface with a BAS, is additional hardware required? If yes, describe.

Operation

Does the controller require on-going maintenance? If yes, describe?

Operation

Does the controller require service contracts for ongoing data access? If yes, describe

Integration capabilities, Reporting capabilities

How can the controller data logged? If proprietary software, describe (what type of account is needed, what logging intervals are available, what does it look like, and describe its capabilities including data download capabilities).

Wifi with proprietary software. Data logging interval is 30 seconds. The phone app allows viewing limited historical data in a table. Max CO2 concentration for the past five occupied periods is available. A Wifi portal allows viewing of live data and downloading the data through to a CSV file. Sensor must be connected to the internet. XCSpec partners, EnerAllies and Environsense, also have a web portal that supports CO2 (and other parameters) logging and report generation.