In this video, Slipstream presenter Ryan Hoger provides an overview of the key features and functionality of refrigerant leak detection systems for HVAC units, focusing on split systems, rooftop units, and fan coils. The systems involve sensors and control boards designed to detect refrigerant leaks and implement safety protocols.
The refrigerant leak detection sensors are factory-installed within the evaporator coil section of the equipment, such as in split systems, air handlers, and rooftop units. These sensors feature a four-wire connection and are linked to a dissipation control board. The primary function of the control board is to manage airflow and power during a refrigerant leak by activating specific components and deactivating others.
For example, when a leak is detected, the main blower is turned on to prevent refrigerant pooling in one area, the compressor is turned off to halt refrigerant circulation, and any auxiliary heating sources, like electric heaters or gas furnaces, are deactivated to eliminate potential ignition sources.
In split systems, unlike package systems, these components require field wiring. Each wire is labeled for easy installation, connecting thermostat signals to the control board instead of the HVAC equipment. The control board regulates which thermostat signals are relayed to the equipment based on the leak status.
Further information is presented on the functions of the sensors and control boards.
Watch other videos from Slipstream:
An Overview of Newer A2L Refrigerants
Choosing a Heat Pump for Commercial Facilities
Watch videos from our Facilities In Focus Series:
Making Networked Lighting Controls Work
Smart Boilers Keep Gaylord Property Running Efficiently
Ryan Hoger is a contributor with Slipstream.
