Patent ID: 11920805
Assignee: GOODMAN MANUFACTURING COMPANY LP
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 10:
11. A method of installing an air temperature controller in a building, the method comprising:
disposing an outdoor unit outside the building;
disposing an indoor unit inside the building, the indoor unit having a heat exchanger that uses A2L refrigerant;
disposing a blower within the indoor unit;
disposing an indoor control board within the indoor unit;
electrically coupling the indoor control board to the blower and the outdoor unit;
disposing one or more A2L sensors within the indoor unit, the one or more A2L sensors configured to detect an amount of the A2L refrigerant within the indoor unit; and
disposing a transformer within the indoor unit; and
electrically coupling an A2L control board to the transformer, the one or more A2L sensors, the indoor control board and the blower, wherein the A2L control board is configured to receive power from the transformer;
wherein:
the A2L control board includes a first relay disposed between the transformer and the indoor control board, wherein the blower and the outdoor unit receive power from the A2L control board via the indoor control board when the first relay is closed,
the A2L control board includes a second relay disposed between the transformer and the blower, wherein the blower receives power from the A2L control board when the second relay is closed, and
each of the one or more A2L sensors comprises a bus connector input, a bus connector output, a sensor relay electrically disposed between the bus connector input and the bus connector output, and a sensor feedback port electrically disposed between the sensor relay and the bus connector output.