During a loss of power on an offshore platform the critical HVAC equipment such as fans will stop working and HVAC dampers will go to the closed position. Once the emergency generators start to produce the emergency power the fans will be one of the first HVAC components to start working again, this is important especially where pressure critical areas are necessary for safety. However, the HVAC dampers pneumatic supply to the actuator may not be reinstated for some minutes, this is a big problem because the fans will be running against closed HVAC dampers. Traditionally operators would manually open the dampers using a temporary pneumatic air supply from a portable compressed air bottle carried by the operator. This is known as HVAC damper black-start.
The Halton Smart Override (HSO) feature is a patented alternative method to manually open the HVAC damper for black-start without the need to carry a cumbersome portable compressed air bottle. By pulling the locking knob and rotating the handle the damper can be opened in seconds (this procedure disconnects the actuator from the damper drive shaft). Once the power and/or pneumatic air supply is reinstated the auto-reset functionality of the Halton Smart Override tool will then automatically reset the damper back to normal operation. This auto-reset feature is critical to ensure the HVAC damper cannot inadvertently be left open or disengaged in error.
This feature also helps during the construction phase when power is not available for the dampers and ventilation ducts need to be opened.
Halton Smart Override function is available for all Halton Marine electrically or pneumatically operated dampers.