iJETCON

Car Park Ventilation Application:

The iJETCON can monitor Carbon Monoxide (CO) in a car park and control the ventilation system per AS1668.2:2012 contaminant monitoring and ventilation control requirements. It is suited to any car park application including conventional ducted car park systems or a car park utilising iJETFANs.

Default System Configuration:

• The main screen of the controller displays the maximum current level of CO in the car park.
• If CO levels are below 15ppm, the ventilation system will be in standby (off).
• If CO levels exceed 15ppm, the ventilation system will be turned on (25% of ventilation rate)
• The controller will proportionally control the ventilation rate between 25-100% as CO levels vary between 15 & 45ppm.
• A purge function will operate at least once in a 24hour system to provide one air change.
• Under any fault condition the controller will run the ventilation system at 100%.
• Nitrogen oxides (NOx) and temperature sensors can be monitored with additional demand levels set up if required by the application.
• The ventilation system fans can be controlled by the iJETCON’s digital & analogue output signals, its fieldbus (Modbus) output signal, or a combination both. Fans can be allocated to 6 separate zones/car park levels. Programmable time schedules are also available.
• The controller provides Mechanical Service Switch Board control (On/Auto/Off) for all fans of the same type in all zones, or if expansion boards are added fan types in individual zones can be controlled.
• Fire Mode & Smoke Mode: AS1668.1:2015 specifies the operation requirements of car park ventilation systems in fire mode. On receipt of the General Fire Alarm (GFA) signal the Jetcon will operate the exhaust fans at 100% ventilation rate, the supply fans at 100% ventilation rate, and stop the iJETFANs (0% ventilation rate) per clause 5.5.5. If smoke is detected in the supply air ductwork the supply fan shall shut down, and on clearance of smoke restart (detection by others). These levels are configurable to your specific requirements.
• The Jetcon also provides the Fire Panel (FIP/FDCIE/FFCP) with the required (Clause 5.5.3) manual override control for iJETFANs. Please note, according to AS1668, only one common switch is required for all iJETFANs within a fire compartment. While the standard does not require the FIP to receive run/fault indication for iJETFANs, the Jetcon can be configured to provide this.
• iJETFANs have the option of an integrated smoke detection system to provide early shutdown of the iJETFANs in the event of a fire. If smoke is detected, the controller will operate fans as per the AS1668.1:2015 fire mode requirements independently from the FIP for 10 minutes. If after 10 minutes the dedicated fire detection/suppressant system has not detected a fire and therefore a GFA signal has not been received by the iJETCON, it will recheck for the presence of smoke. The iJETFANs will operate at minimum speed to resample the air. If no smoke is detected the iJETCON will return to its Automatic mode. If smoke is detected, it will remain in smoke mode for a further 10 minutes. If during this time a GFA signal is received the iJETCON will enter Fire Mode.
• Fire and smoke mode fan responses and speeds are adjustable as are the smoke delay times. The iJETCON is complimented with a Touch Screen Graphic User Interface that yields an easy-to-use graphic display that shows the status of the car park and all of the connected fans, drives and sensors.