Hitachi UTOPIA R32 Series - 9.3 RAS-(2-3)HVRC3 Vacuum Pumping Example

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PMEN0654 rev.0 - 12/2023
9
RAS-(2-3)HVRC3 VACUUM PUMPING EXAMPLE
VACUUM PUMPING
9.3 RAS-(2-3)HVRC3 vacuum pumping example
Outdoor unit
Liquid line stop valve
Manifold
gauge
Gas line stop valve
Vacuum pump
Nitrogen tank
(for air ght test and
nitrogen blow during brazing)
Gas line
Liquid line
Mul-Kit
Indoor unit
Cover the are nut and union of the piping
connecon securely with thermal insulaon
Indoor unit thermal insulaon nishing.
Wind a tape from outside of thermal insulaon of gas piping and liquid piping.