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what should you do when refrigerant leaks and sprays
let it go, don't put yourself in harms way
what tool should you use to check power in a furnace
multimeter
What is the most common metering device in a high efficiency system
Thermal Expansion Valve (TXV)
What is one HCFC refrigerant?
R-22, R-123, R-124, R-124B
safest refrigerant catergory
hfo
tool that is used to create straight bends and folds in sheet metal
hand brake
How many Volts does the thermostat send to the control board
24 VAC
What must be done before disposing of any appliance containing a refrigerant?
The refrigerant must be recovered
what causes refrigerant slugging
oil entering the compressor
tool used to light a brazing torch
striker
What is the connection between the ductwork and the furnace
The Plenum
Which gas(es) cause the LEAST environmental damage during a leak check?
nitrogen (dry)
what should be the desired sub cooling value in most systems (hint - in Fahrenheit)
10-20 degrees within range
tool used to take rubber off of copper wire
wire strippers
What is the function of the Inducer Motor
Pulls in flue gases from the heat exchanger and pushes it out through the flue pipe
Q: Which chlorine-containing refrigerants are most likely to reach the stratosphere?
CFC's
most common residential refrigerant
r410-a
what tool should you use to thread pipe
piper threader
What component do Heat Pumps have (besides a reversing valve) that is different than a regular split system
A defrost board for the outdoor coil
What is the maximum fill percentage for a refillable cylinder?
80%