↓
Indoor unit connection check
↓
Address setting
↓
Refrigerant piping connection
(Outdoor unit)
↓
Leak pressure test
• Seal with nitrogen up to 4.2 MPa.
• After 24 hours, check whether the pressure in piping
has not descended.
↓
Vacuum evacuation and drying
• Do not purge system with refrigerant.
• Use a vacuum pump with check valve to prevent the
back flow of vacuum pump oil into the refrigerant
system.
↓
Additional refrigerant charge
Calculate additional refrigerant charge. Add additional re-
frigerant with R410A gage manifold and hose.
↓
Gas leakage check
↓
Outside panel installation
↓
Test run and adjustment
End of work
↓
Hand over
↓
Customer training
2-1. Important items when using refrigerant (R410A) - (06-16) - 2. Piping design
SYSTEM
DESIGN
SYSTEM
DESIGN
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