To vacuum pump, from refrigerant container, to recovery machine
What is the typical uses of the center port of a gauge set?
100
High Pressure Liquid
What is the state of the refrigerant leaving the condenser?
100
An appliance typically charged at the factory with five pounds or less of refrigerant
What is a Small Appliance?
100
To permit a check of moisture content in the system
What is the purpose of a sight glass?
100
Used to clean ice from a sight glass
What is alcohol spray
200
Blue (Low Side) and Red (High Side)
What is the color of a manifold gauge set?
200
3 oxygen atoms
What is Ozone
200
DOT (Department of Transportation)
What is the Federal agency that set standards for portable refillable tanks or containers used to ship refrigerants?
200
It can cause moisture to freeze in the system
What is oversized vacuum pump?
200
Minium saturation temperature neede to achieve before liquid is charged into a chiller
What is 36 degrees F.
300
Unit has a leak or major component failure (compressor burnout)
What is System Failures that require taking a oil sample
300
The ability of any chemical to deplete the Ozone Layer
What is Ozone Depletion Potential
300
Must be able to recover 80% of the refrigerant if the compressor is not operative or 90% of the refrigerant if the compressor is operative
What is the requirements placed on recovery machines built after November 15, 1993?
300
The receiver is installed o this side of the system
What is High side
300
The maximum pressure used when leak checking a low pressure chiller
What is 10 PSIG
400
pressure-verses-temperature curve
What is "Temperature Glide"?
400
A mixture of two or more compounds (refrigerants) where the mixture behaves like a single chemical (new refrigerant)
What is an Azeotrope Refrigerant?
400
Hydrochloric acid, hydrofluoric acids and phosgene gas
What is the acids formed when refrigerants touches a source of high heat?
400
Recovering in a vapor state reduces unwanted loss of this.
What is Oil and unwanted contaminants from the system to the recovery machine and recovery drum?
400
The rise permitted by ASHRE 3-1990 in vacuum levels during a standing vacuum test
What is Starting at 1mm of Hg., after 12 hours the vacuum reading should not increase to more than 2.5mm of Hg
500
A1 (no flammability and low toxicity)
What is the most safe safety classification within the ASHRAE standard?
500
forms Hydrofluoric and Hydrochloric acids
What is "what happens to the oil in a compressor if moisture is left in an operating system"?
500
Self-contained breathing apparatus
What is the apparatus used when entering an area of a large refrigerant leak?
500
The requirements placed on a recovery machine built after November 15, 1993
What is must be able to recover 80% of the refrigerant if the compressor is inoperative or 90% if the compressors operative. Must be EPA certified
500
The final vacuum level required for recovering refrigerant from a low pressure system if the recovery equipment was manufactured before November 15, 1993