- Journal
- Année
- 2019
- Pages
- 60-61
Abstract
Pump-down is a process of storing refrigerant in the outdoor unit. In normal practice, pump down was done manually before any service or repair. This experimental project focused on developing an automatic pump-down system attached to split-unit as part of leak prevention effort. A 1 hp split-unit was connected with two set of pressure switches and solenoid valves work as stopper to shut of both lines in the event of leakage. Compressor continue running until all refrigerant were pumped into the outdoor unit. Few leakage case were constructed to examine the capability of the new automatic pump down system. The results show that 99.98% refrigerant were able to recovered.