The system should be evacuated to approximately 200/250 microns. Then perform a 5 minute holding test. You may expect a low grade loss of the vacuum as normal. However, a rapid rise to normal atmospheric pressure would signal a system leak is present and must be located and repaired before recharging the product. A slower pressure rise to approximately 1500 microns would signal moisture still present in the refrigeration system.
On a “WET”system, it would be beneficial to use heat lamps to raise the temperature of the compressor dome and evaporator surface area during the evacuation.
To assure a properly recharged product, the refrigerant charge must be weighed into the product using an elec- tronic charging scale or
| MANIFOLD SET |
OPEN | OPEN |
| OPEN |
| HIGH SIDE |
| SERVICE |
| VALVE |
| LOW SIDE |
| SERVICE |
| VALVE |
| MANIFOLD SET |
OPEN | CLOSED |
| CLOSED |
| HIGH SIDE |
| SERVICE |
| VALVE |
| LOW SIDE |
| SERVICE |
| VALVE |
CLOSED |
CHARGING |
CYLINDER |
OPEN |
VACUUM
PUMP
CLOSED
ELECTRONIC
SCALE
CLOSED
VACUUM
PUMP
OPEN
CHARGING
CYLINDER
OPEN
ELECTRONIC
SCALE
IMPORTANT: Service personnel are held responsible for ALL ASPECTS OF THE CLEAN AIR ACT OF JULY, 1992.
REFRIGERANT DEFINITIONS (ASHRAE 3-1990)
RECOVERY
To remove refrigerant in any condition from a system and store it in an external container without necessarily testing or processing it in any way.
RECYCLING
To clean refrigerant for reuse by oil separation and single or multiple passes through devices, such as replace- able core
RECLAIM
To reprocess refrigerant to new product specifications by means which may include distillation. Will require chemical analysis of the refrigerant to determine that appropriate product specifications are met. This term usu- ally implies the use of processes or procedures available only at a reprocessing or manufacturing facility.
NOTES REGARDING RECLAIM:
“New product specifications”currently means ARI standard
166240008 | 26 | 3/17/95 |
