6. SYSTEM DESIGN
WORK FLOW (EXAMPLE)
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Prepare schedule of works
Refrigerant check
Refrigerant piping work
Drain piping work
Duct work
Insulation work
Electric wiring work
Outdoor unit foundation work
Outdoor unit installation
Leak pressure test
Vacuum evacuation and drying
Refrigerant additional charging
Gas leakage check
Check run
Test run and adjustment
Hand over
Customer guidance
Refrigerant piping connection (Outdoor unit)
Remote controller installation
Operation chart preparation
Indoor unit installation
Always check the refrigerant to be used.îž”
Always use the specified refrigerant.îž”
Prepare materials / tools matched to the refrigerant.îž”
Air purging by refrigerant gas is strictly prohibited.îž”
Use a special vacuum pump with reverse check mechanism.îž”
Seal with nitrogen up to 4.2 MPa.îž”
After 24 hours, check wether the pressure in piping has not îž”
descended.
Calculate the refrigerant additional charging amount, and îž”
charge a suitable amount. (Using a special R410A gauge
manifold and charging hose.)
Do not connect to the power source.îž”
Use copper tube matching the specified material and îž”
thickness to meet endurance pressure of the pipe. (4.2 MPa)
Do not use pipes contaminated with dust and dirt during îž”
piping connection work.
Preparations
Start of work
- (06 - 12) -
SYSTEM
DESIGN
SYSTEM
DESIGN
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