System Classification
This is how you identify a rooftops refrigerant charge
Equipment Data Plate
If a cylinder is 70 degrees containing 1 oz or 10lbs of R22 the pressure would be
121 PSIG
First step after repairing a leak is to
Add nitrogen to check your repair
When inspecting for potential leak the technician should look for this first
Oil
What should you do to speed recovery process
Cool your tank and heat the system
Owners and operators are responsible for
Keeping records for up to 3 years
High superheat is a symptom for
Low refrigerant charge
Use the charge stated on the units data plate to determine
Factory charge and annual leak rate
What leak search method does a technician use when a system is void of charge
Nitrogen with trace refrigerant for electronic
When filling a charged recovery cylinder with a regulated refrigerant, the vapor refrigerant must be
Recovered after liquid is completed
What is the main difference between Section 608 and 609 of the clean air act
608 is for stationary equipment 609 is for MVAC
If you are charging a system that uses a TXV what charging method is required
Subcooling
What % of annual leak rate is allow for comfort cooling
10% or more annually
Where should a technician look for nitrogen test pressures
Low side test pressures on data plate
System dependent or passive recovery technique can be used on appliances up to
a charge of 15 pounds or less
All HVAC systems must be protected by a
Pressure Relief Valve
Non Condensables will cause
High discharge pressure
Maximum leak rate allowed for Commercial Refrigeration
20% annually
When leak searching a system with a standing charge you would use what method
Electronic or Ultrasonic leak detector
High pressure appliances under 200 pounds of charge must be evacuated to
0 inches or atmospheric pressure
Pressure relief Valves can not be installed in
Series
More than 500 lbs of full charge for commercial refrigeration or industrial process equipment it is required to be inspected _______ after the repair
Every 3 months after the repair
When requesting to extend a leak repair deadline, not having a ____ is not an excuse
Technician available
Leak inspection , initial verifications, and follow up test records must be kept on file for
3 years
When recovering a medium pressure appliance with over 200 pounds of charge what is the required level
15 inches of mercury