York 66386-YUM-C-1011 - Manuals

66386-YUM-C-1011 2 Johnson Controls Unitary Products SAFETY INFORMATION FOR YOUR SAFETY • Make sure that the furnace area is clear and free of combustible materials, gasoline and other flamma-ble vapors and liquids. • Be sure the furnace is clear and free of insulating material. Examine the furnace ...

66386-YUM-C-1011 Johnson Controls Unitary Products 3 INPUT The correct heat capacity of the furnace is regulated by theburner orifices and the gas pressure. The proper orifices arefurnished but the gas pressure regulator must be adjusted bythe installer or gas utility service technician. OPERATING I...

66386-YUM-C-1011 4 Johnson Controls Unitary Products EXPLAIN UNIT FUNCTION When the system is functioning properly, show the owner thelocation of all disconnect switches and the thermostat.Explain how to start and stop the unit and how to adjust tem-perature settings within the limitations of the sy...