HVAC EPA Certification Type 3 Q&A
What type of appliance can a technician work on with a type 3 certification? - =Low pressure
appliances such as chillers
What do CFC-11, HCFC-123, HFC-245fa, and HFO-1233zd have in common? - =They are low
pressure refrigerants that have high boiling points
Low pressure appliances operate - =In a vacuum or below atmospheric pressure
Where does the purge unit take its suction from? - =The top of the condenser
What is the pressure relief device on a low-pressure chiller called? - =A rupture disc
What is the boiling point of R-123 refrigerant at atmospheric pressure? - =83 degrees F
When charging a low pressure water chiller with R-123, charging begins with vapor, until what
pressure is reached in the system? - =18.9 "hg
If the condensing temperature of a low pressure chiller is 100 degrees F, that means the high side
pressure is: - =6.1 psig
What can happen when a low pressure appliance has a leak at a fitting or gasket? - =Air and
moisture can enter the system
What do low pressure appliances require since they operate below atmospheric pressure? - =A
purge unit
What is the most effective way to leak test a charged low pressure chiller? - =Use controlled hot
water or electric heating blankets to increase system pressure
What type of appliance can a technician work on with a type 3 certification? - =Low pressure
appliances such as chillers
What do CFC-11, HCFC-123, HFC-245fa, and HFO-1233zd have in common? - =They are low
pressure refrigerants that have high boiling points
Low pressure appliances operate - =In a vacuum or below atmospheric pressure
Where does the purge unit take its suction from? - =The top of the condenser
What is the pressure relief device on a low-pressure chiller called? - =A rupture disc
What is the boiling point of R-123 refrigerant at atmospheric pressure? - =83 degrees F
When charging a low pressure water chiller with R-123, charging begins with vapor, until what
pressure is reached in the system? - =18.9 "hg
If the condensing temperature of a low pressure chiller is 100 degrees F, that means the high side
pressure is: - =6.1 psig
What can happen when a low pressure appliance has a leak at a fitting or gasket? - =Air and
moisture can enter the system
What do low pressure appliances require since they operate below atmospheric pressure? - =A
purge unit
What is the most effective way to leak test a charged low pressure chiller? - =Use controlled hot
water or electric heating blankets to increase system pressure
