Residential Central Air-Conditioning Systems Flashcards
Connections that can be made without losing refrigerant or getting air into a precharged system are ____
quick-connect couplings
A cooling system with an evaporator and condenser that are oversized for an application will result in a system that cycles off before it has provided adequate ____.
dehumidification
The primary control of a building’s split a/c system is the ____.
thermostate
The primary device that turns on a compressor is the ____.
contactor
A condensing unit is usually installed about ____ away from a building.
12” to 24”
The sheet metal plates that support the evaporator coil and direct all plenum air through the evaporator coil are the ____.
blank-off plates
The most important measurement to check and compare to manufacturer specifications on electric resistance heating elements is ____.
current draw
What should the temperature differential be between the evaporator inlet and outlet.
16 F to 20 F
VRF systems typically use a(n) ____ as the refrigerant metering device.
EEV
The average ac motor’s speed is primarily based on ____.
frequency of voltage and number of poles
