Haier AU282FHERA [29/69] Utilized tool comparison for mrviii r22 and r410a

8.9 Utilized tool comparison for MRVIII R22 and R410A

TOOL PURPO8E R22 R410A REA8ON

Knife Cut the pipe Ο Ο

Expander Enlarge the pipe Ο Χ For R410A, must enlarge the projecting pipe.

Spanner Fasten the are nut Ο Χ Standard torque of 1/2, 5/8 pipe is larger.

Flare tool Flare the pipe Ο Ο

Pipe bender Bend the pipe Ο Ο

Pressure gauge Used in leakage test Ο Χ Leakage test pressure is higher.

Welding torch Brazing the pipe Ο Ο

Gauge manifold Evacuation device Ο Χ

Different pressure from R22: max.: HP5.3Mpa

min.: 3.5Mpa.

Charging hose Charging refrigerant Ο Χ

Vacuum pump with

one-way stop valve

Evacuation device Ο Χ

Must ensure oil in vacuum pump can not ow

into the unit when pump stops.

Charging cylinder Charging refrigerant Ο Χ R410A can not be charged as gas state.

Electronic charging

scale

Charging refrigerant Ο Ο

Leakage detector Leakage detecting Ο Χ

Can not use freon detector (CFCs or

HCFCs), R410A excludes Cl. Use the

hydrogen detector (or R134a detector).

Note:

The pipes of R410A connection with the same diameter can not be welded with the ared joints. You must expand

the diameter of pipe joint, then weld the connecting pipe.