Core
What certification would you need to work on a heat pump
type 2
what is a small appliance
fully charged, hermetically sealed at the factory, charge of 5lbs or less
if you smell an odor what has likely occurred
compressor burnout
what is the max pressure for leak testing on a chiller
10 psi
what type of refigerant is r-12
CFC
what does the EPA 608 certication give the ability to do
purchase and handle refrigerants
max charge for a small appliance
5lbs
before recovering refrigerant in a recovery tank what should you do
evacuate the cylinder
leak rate for comfort cooling applications
10%
what is used to pinpoint leaks in a system
soap bubbles
what type of refrigerant has the most ODP
CFC
why piercing valves should never be permanent
leak over time
leak rate for industrial cooling application
30%
best way to leak test chillers
controlled hot water and heated blankets
after you finish installation what do you do
pressurize and leak test the system
what chemicals are in an HFO
Hydrogen, fluoride, and carbon
with an operating compressor what is the required vaccuum
90% of the remaining charge
what will speed up recovery
heat system, ice tank, short hoses
what is the psi the rupture disc relieves at
15 psi
fastest way to recover rerigerant
liquid
what organization determines safety classifications for refrigerants
ASHRAE
what do CFC and HCFC refrigerants decompose into
why does a compressor overheat in a vaccuum
it needs refrigerant to cool it
what should the temperature of the room the chiller is in before starting recovery
stable
when each refrigerant in a blend leaks individually
fractionation