Removing 4-Way Valve - Hitachi mini-HNRQ1 Series Service Manual

MAINTENANCE

1.12 Removing 4-Way Valve

(1) Remove the service cover, the upper cover, the side cover, and the rear cover.
(2) Recover the refrigerant from check joints.
(3) Remove the 4-Way valve coil.
(4) Remove the 4-Way valve assemblies from the secured positions (four brazed parts).
(a) Remove the 4-Way valve and the gas stop valve while cooling the valve bodies with a wet cloth.
(b) Perform the brazing work while keeping the flame away from electrical wiring and piping insulation.
(5) Remove the 4-Way valve from the assemblies (four parts). Remove/Attach the 4-Way valve while cooling
the valve bodies with a wet cloth.
(6) To attach the new 4-Way valve after replacement, reverse the removal procedure.
Model：3~3.5HP
Model：4~6.5HP
Model：7~12HP
Phillips Screwdriver, Charging Hose, Torch, Wet
Tool
138
Cloth, Adjustable Wrench