Remove Dirt Or Water In The Pipe; Airtight Test; Air Purge With Vacuum Pump - Vivax HPS-42HM84AERI/I1s User Manual

ENG
Connection method
2)
4‐16 kW outdoor unit
Indoor unit
Max.piping length (H+L1)
Max difference in height (H)
Remove Dirt or Water in the Pipes
1)
Make sure there is no any dirt or water before connectiong the piping to the outdoor
and indoor units.
2)
Wash the pipes with high pressure nitrogen, never use refrigerant of outdoor unit.
Airtight Testing
Charge pressured nitrogen after connecting indoor/outdoor unit pipes to do airtight
testing
Pressured nitrogen [4.3MPa (44kg/cm
Tighten high/low pressure valves before charging pressured nitrogen. Charge pressure
nitrogen from the connector on the pressure valves.
The airtight testing should never use any oxygen, flammable gas or poisonous gas.
Air Purge with Vacuum Pump
1)
Using vacuum pump to do the vacuum, never using refrigerant to expel the air.
2)
Vacuuming should be done from liquid side
Gas side
Flaring
Flaring
MODELS
2
) for R32] should be used in the airtight testing.
Liquid side
Flaring
Flaring
4‐16 kW
30m
20m
CAUTION
21
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VIVAX