ActronAir CO2 Sensor Installation and Commissioning Guide

Introduction

Congratulations on your purchase of an ActronAir CO2 sensor. This sensor is designed to control the amount of fresh air introduced into compatible ActronAir air conditioning units with outside air dampers for Demand Control Ventilation (DCV). DCV modulates outdoor airflow based on space occupancy, potentially reducing energy consumption and operating costs.

Important Note: CO2-based DCV should not be applied in zones with indoor CO2 sources other than occupants. Failure to follow installation procedures may result in personal injury, damage to the air conditioner or sensor, or void the warranty.

Installation

02.01. Dimensions

The ActronAir CO2 sensor (CCO2-S and CCO2-MOD) has specific dimensions detailed in the diagrams. The CCO2-S measures 114.30mm in height and 71.12mm in width. The CCO2-MOD also has similar dimensions. Mounting involves a rear plate and cover, with screw and tab mechanisms for secure attachment.

CCO2-S Dimensions: Height: 114.30mm, Width: 71.12mm. Mounting holes are indicated.

CCO2-MOD Dimensions: Similar to CCO2-S, with specific mounting hole details provided.

02.02. Cable Specifications and Mounting Location

The recommended cable is 0.50mm² shielded data cable. The sensor should be mounted 1.0 to 1.8 meters above the floor, away from direct airflow from diffusers, doorways, and other external influences to ensure accurate CO2 concentration readings.

Remove the bottom screw.
Press tabs and lift the cover.
Mount the rear plate in the chosen location.
Pull wires through the base hole and make connections, ensuring cable entry gaps are sealed.
Secure the cover.

02.03. DIP Switch Settings

DIP switches are used to configure the CO2 sensor's output and other settings. Access is gained by removing the sensor cover.

02.03.01. Tri-Capacity and Hercules

For Tri-Capacity and Hercules models, DIP switch settings determine the output type (Voltage or Current) and range. Switch Position 1 controls CO2 output selection (Voltage/Current). Switch Position 2 is not used and should be OFF. Switch Positions 3 and 4 configure the output range (e.g., 0-10V, 4-20mA).

Example Settings:

4-20mA Output: Switches 1, 3, and 4 are typically set to OFF, ON, OFF respectively for Hercules/Tri-Capacity.
0-10VDC Output: Switches 1, 3, and 4 are typically set to ON, OFF, OFF respectively for CG10K.

02.03.02. Variable Capacity Commercial and Genesis (PKV/CRV and PRV/CRV)

The CCO2-MOD features two DIP switches: SW2 (8-position) for RS-485 address configuration and SW1 (4-position) for hardware/software options. The factory default RS-485 address is 127. SW1 settings, including Auto Serial Configuration (AUT), are used for communication protocols.

SW2 RS-485 Address: To set the MAC address to 127, all DIP switches (SW2) must be ON, except for position 1. The address is determined by summing the values of the ON switches (e.g., 64+32+16+8+4+2+1 = 127).

SW1 Settings: Positions 1 and 2 are used for communication with the ActronAir Board. Position 1 and 2 ON is the default. Auto Serial Configuration (AUT) can be enabled (ON) or disabled (OFF).

Wiring Diagrams

Detailed wiring diagrams are provided for different ActronAir models:

02.04.01. Hercules Models: Illustrates connections for Hercules units, including power, ground, 4-20mA output, and temperature sensor inputs. It specifies cable types and recommended wire sizes.
02.04.02. Tri-Capacity Models - CM100: Shows the connection of the CO2 sensor to the Multi Input 2 terminal block for Tri-Capacity models with a CM100 controller.
02.04.03. Tri-Capacity Models - uPC: Details the connection for Tri-Capacity models with a uPC controller, requiring voltage divider terminal blocks for 0-10V analogue input.
02.04.04. Tri-Cap 0-10VDC Voltage Divider Terminal Block - uPC: Provides step-by-step instructions for installing voltage divider terminal blocks for uPC controllers.
02.04.05. Variable Capacity Commercial and Genesis (PKV/CRV and PRV/CRV): Shows optional humidity sensor and CO2 sensor connections for these models.

Controller Setup

The optional CO2 sensor function requires enabling and configuration. For third-party control, contact the respective supplier.

03.01. CO2 Sensor Setup

The CO2 levels and corresponding damper positions are adjusted according to application requirements. The setup involves configuring the unit's control mode and input type.

03.01.01. Tri-Capacity and Hercules

The unit control mode should be set to INTERNAL SENSOR. The input type is typically 4-20mA for CM100 controllers or 0-5V for uPC controllers. The sensor connects to specific ports (e.g., Hercules - U12, Tri-Capacity - Multi Input 1 or 2).

Compatibility Notes:

Hercules with CM100: Software 2021-136-1030 onwards.
Tri-Capacity with CM100: Software 2021-136-2008 onwards.
Tri-Capacity with uPC: Software 2021-136-3000 onwards.

Configuration Steps (Tri-Capacity Example):

Navigate to Service page Gfc8 to assign the CO2 sensor to Multi Input 2.
Set Multi Input 2 to YES and select the appropriate probe type (4-20mA for CM100, 0-5V for uPC). Ensure Multi Input 1 configuration is not changed.
Navigate to Economy Setting page Gfd1.
Change 'Enable CO2' to YES to activate the sensor.
Adjust CO2 levels and damper positions as per application requirements and relevant standards. The diagram shows damper position relative to CO2 levels (Min ppm to Max ppm).

03.01.02. Variable Capacity Commercial and Genesis (PKV/CRV and PRV/CRV)

The CO2 sensor is enabled using an RJ485 connector via the Outdoor Board, Bluetooth Commissioning Tool, or Unit Installation Guide. Refer to the unit's Installation and Commissioning Guide for detailed instructions on enabling the CO2 sensor using NEO.

03.02. Minimum Outside Air Setup (Demand Controlled Ventilation)

03.02.01. Tri-Capacity and Hercules

Select service page Gfc31 to check the CO2 sensor operating range, enable/disable fault alarms, and set alarm levels. If the sensor is not operating or is out of range, the outside air operates at the minimum setting.

Gfc31 Settings:

For Tri-Capacity: CO2 Control settings are configured via Gfc8.
For Hercules: U12 Input is set to 4-20mA. Start/End CO2 levels and Alarm Output/Sensor Fault levels are configured here.

03.02.02. Variable Capacity Commercial and Genesis (PKV/CRV and PRV/CRV)

Refer to the Variable Commercial Capacity Installation and Commissioning Guide for CO2 setting enablement. Menus for setting minimum/maximum damper positions and CO2 scale include oAdC, oAdo, ECEO, ECOE, EHCO, EHCS, CCE, Etd, EoLt, EoHt, EoLd, EoHd, EoHn, EodP, EoHE, EEd, ELPL, EHPL, ELdP, EHdP.

CO2 Status

03.03.01. Tri-Capacity and Hercules

To view current CO2 concentration levels, go to Status Screen Page E1. The 'CO2 Sensor' field displays the concentration. Screenshots for Tri-Capacity and Hercules are provided, showing example readings.

03.03.02. Variable Capacity Commercial and Genesis (PKV/CRV and PRV/CRV)

CO2 setup can be done via the outdoor board. Refer to section 03.02.02 for required parameters.

Specifications

Model	CCO2-S	CCO2-MOD
CO2 Sensor	Single beam, dual wavelength NDIR	Capacitive Polymer
Humidity Type	Capacitive Polymer
Humidity Range / Limits	0 to 100% RH / 10 to 95% RH (non-condensing)
Temperature State	Solid state band gap
Temperature Range / Limits	0 to 50°C
PPM Range	0 to 2000
Accuracy	±40 ppm ±3% of reading
Relative Humidity	±2% (10 to 90% RH)
Temperature	±1°C @25°C
Temperature Dependence	±8 ppm/°C at 1100 ppm
Non-Linearity	16 ppm
Pressure Dependence	0.13% of reading per mm Hg
Response Time	2 min for 99% step change
Power Requirements	16 to 35 VDC or 19 to 28 VAC	10 to 42 VDC or 10 to 30 VAC
Power Consumption	Average: 2 W Peak: 3.75 W	Average: 0.5 W Peak: 1.2 W
Communication Protocol	N/A	2-Wire RS-485, Modbus RTU
Output	4 to 20 mA (max. 500 Ω)	Modbus
Weight	125 g
CM100 Software
Hercules	2021-136-1030 onwards	N/A
Tri-Capacity	2021-136-2008 onwards	N/A
VCC/Genesis 70-100	N/A	CMI 4.18
Connecting Cable
Maximum Cable Length	50 metres	100m
Recommended Cable	VCC - 0.50mm² - 0.65mm² twisted pair cable

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