Daikin RZP100DVAL [114/255] Cautions in working with the new refrigerant

Daikin RZP125DV1 [114/255] Cautions in working with the new refrigerant
SiE25-110 Maintenance Inspections
Troubleshooting 105
Cautions in
working with the
new refrigerant
Brazing
The new refrigerant required very stringent cares to prevent the intrusion of impurities.
Therefore, a nitrogen gas must be supplied into the pipe during brazing.
Ensure to carry out proper protection covering work for refrigerant pipes and vacuum drying,
and also exercise more thorough process control on the new refrigerant than on the previous
refrigerant to prevent the intrusion of impurities into pipes even in other processes than
brazing.
Flaring
Carry out thorough deburring (filing) on the cut sections. Pay utmost care to prevent chips
from remaining in the pipes.
Apply an appropriate amount of oil on the inside and outside of the flared section. Be sure to
use refrigerant oil or synthetic oil (ether-base oil, ester-base oil, alkylbenzene-base oil, or
mixed oil of these oils).
Refrigerant charge
Charge the new refrigerant in the liquid state through the service port of stop valve on the
liquid side (outdoor unit). Conduct vacuum drying using vacuum pump, and never conduct
flushing during refrigerant charging.
Air tight test
An air tight test for equipment must be conducted.
Caution Be sure to conduct service work strictly following the contents mentioned above.
Conducting service work in improper methods can cause equipment trouble.

Содержание

Скачать