Hi, does a damper actuator qualify as an active control?
Per CIR#10242, "Active control is the control capable of sensing space occupancy and adjusting the HVAC system demand based on the changes in space occupancy, which does not equal a thermostat or a separate thermal zone for each space. For VAV systems and non-VAV systems, active controls typically regulate the required outdoor air flow for ventilation, such as using demand controlled ventilation with CO2 sensors in each private office and specialty occupancy space, or regulate temperature set point based on occupancy by adjusting the HVAC system to operate under the unoccupied set back when occupant sensors indicate that the space is unoccupied."
We have a VRF system and installed actuators with temperature sensors connected to BMS. The way it works is that the damper actuator operates air control dampers in ventilation and air-conditioning systems. These are connected to temperature sensors that automatically triggers the BMS to adjust the HVAC system according to the temperature readings. When there is no people in the space, the temperature sensor connected to the BMS adjust the air conditioning system. Will this suffice as an active control?
Thank you in advance.
Dylan Connelly
Mechanical EngineerIntegral Group
LEEDuser Expert
472 thumbs up
August 13, 2013 - 6:40 pm
Does the damper control the total air to the room or just the ventilation supply to the back of the VRF unit?
Katherine Ann Resurreccion
Arcadis Philippines, Inc.159 thumbs up
August 28, 2013 - 11:51 pm
Hi Dylan, the motorized damper control the ventilation supply back to the VRF unit. Will this suffice?
Dylan Connelly
Mechanical EngineerIntegral Group
LEEDuser Expert
472 thumbs up
September 3, 2013 - 5:42 pm
That is good. You can use the motorized damper to reduce the outside air to the spaces when a sensor says there is no one in the space. Or use a CO2 sensor. You would need to have a motorized damper for each space.
Katherine Ann Resurreccion
Arcadis Philippines, Inc.159 thumbs up
September 4, 2013 - 2:03 am
Many thanks!