Haier BD-478A Service Manual page 39

(2) Please keep the pliers, pipe cutting unit and Hansen valve clean, and
keep them away from grease dirt.
12.5.3 Procedure for filling equipment
(1) Preparation before use
① Visually inspect recovery machine for abnormalities, etc.
② Keep all valves closed to equipment until really to proceed.
(2) Evacuation
① Connect recovery machine hoses to system fittings
② Switch on power.
③ Switch on motor.
④ Open all related valves.
⑤ Observe the pointer of vacuum meter when it is accessing the mark –1.
⑥ Evacuation time shall not be less than 45 min.
⑦ After evacuation close valves.
MAINTENANCE SERVICE AND TROUBLE SHOOTING
Maintenance Service and Trouble Shooting
⑧ Switch off motor.
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