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EPA Section 608 Refrigerant Handling Part 2
This deck covers key concepts and regulations related to refrigerant handling, including the three 'R's, appliance types, and EPA requirements.
What MUST be placed on a refrigerant cylinder being returned for reclaiming?
A refrigerant label.
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Key Terms
Term
Definition
What MUST be placed on a refrigerant cylinder being returned for reclaiming?
A refrigerant label.
After completing the transfer of liquid refrigerant between a recovery unit and a refrigeration system, you should guard against what?
Trapping liquid refrigerant between the service valves.
When pressurizing a system with nitrogen, you should always?
Charge through a pressure regulator.
What are the three 'R's'?
Recover, Recycle, and Reclaim.
In relation to the three 'R's' what is Recover?
To remove refrigerant in any condition from a system and store it in an external approved container.
In relation to the three 'R's' what is Recycle?
To clean refrigerant for reuse by separating the oil from the refrigerant and removing moisture from the refrigerant by passing it through one or more...
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| Term | Definition |
|---|---|
What MUST be placed on a refrigerant cylinder being returned for reclaiming? | A refrigerant label. |
After completing the transfer of liquid refrigerant between a recovery unit and a refrigeration system, you should guard against what? | Trapping liquid refrigerant between the service valves. |
When pressurizing a system with nitrogen, you should always? | Charge through a pressure regulator. |
What are the three 'R's'? | Recover, Recycle, and Reclaim. |
In relation to the three 'R's' what is Recover? | To remove refrigerant in any condition from a system and store it in an external approved container. |
In relation to the three 'R's' what is Recycle? | To clean refrigerant for reuse by separating the oil from the refrigerant and removing moisture from the refrigerant by passing it through one or more filter dryers. |
Can Recycled refrigerant be resold? | It cannot be re-sold but it can be re-used. |
In relation to the three 'R's' what is Reclaim? | To process refrigerant to a level equal to new (virgin) product specifications as determined by chemical analysis. |
Can Reclaimed refrigerant be resold? | Yes, but must meet the standard set forth in ARI 700 before it can be resold. |
What chemical has been found in the stratosphere indicating ozone depletion? | Chlorine Monoxide (CLO) |
What are 5 Type I appliances? | 1.Household refrigerators 2.Household freezers 3.Room air conditioners 4.Water Coolers 5.Drinking fountains |
What are 6 Type II appliances? | 1.Walk-in coolers 2.Walk-in freezers 3.Reach-in refrigerators 4.Reach-in freezers 5.Residential & Commercial comfort cooling systems 6.Ice machines |
What is an example of a Type III appliance? | Low pressure chiller. |
When is 'Dew Point' used? | When calculating Superheat. |
When is 'Bubble Point' used? | When calculating Sub-cooling. |
What does the EPA require on all Type I equipment that uses Class I or Class II refrigerants? | EPA requires a service aperture (process stub). |
TXV | Thermostatic Expansion Valve |
The EPA considers a major repair to be the replacement of what 4 items? | 1.Evaporator 2.Condenser 3.Compressor 4.Auxiliary Heat Exchanger |
When the refrigerant is put back into a Type III chiller, following recovery and system repair, where is it added? | The charging valve on the evaporator. |
What method is used to find suspected water tube leaks in chillers? | Hydrostatic (tube) test |
What temperature should be attained when removing oil from a low pressure system to ensure a lower level of refrigerants in the oil? | 130-Degrees F |
The typical design burst pressure for a rupture disc is what? | 15 PSIG |
Excessive moisture collection in the purge unit can indicate what? | Tube Leakage |
Vacuum pumps need to be capable of pulling what level of vacuum? | 500 microns |
All refrigeration systems containing more than 50 lbs. of refrigerant must be repaired when the annual leak rate exceeds___? | 35% |
The most efficient method of leak checking a charged low-pressure system is to use? | Controlled hot water or heater blankets. |
Systems with open drive compressors are prone to leak where? | At the shaft seal. |
What does ASHRAE standard 15 require? | A refrigerant monitor that will sound an alarm and automatically start a ventilation system in equipment rooms before the refrigerant concentration reaches the TLV-TWA. |
TLV-TWA | Threshold Limit Value, Time Weighted Average |
A-1 Group Refrigerants only require what? | Oxygen Deprivation Sensor |
All 'B' rated refrigerants require what? | 'Refrigerant Specific' Mechanical Room Sensor. |
What are Cooling Towers? | They are heat removal devices used to transfer process waste heat to the atmosphere. |
What is the maximum test pressure to use for pressurizing Type III centrifugal systems with nitrogen? | 10 psig |
Enough vapor has entered the system and you may begin charging liquid refrigerant when the refrigerant saturation temperature increases to? | 36F |