Outdoor Ball Valve Operation - McQuay MDS Series Service Manual

2.5 Outdoor Ball Valve Operation

Other than installer, service personnel are often required to operate the ball valve during service and
maintenance work. Ball valves operation steps are as follow:
1. Operate the gas side ball valve

Uninstall the flange connector: remove the flange connector from the piping

Stick the seal material to cover the inlet of the ball valve flange to avoid the dirt entry

Change the hollow seal pad

Fix the flange connector and hollow seal pad and fixed ball valve of gas side with screw bolt.
2. Liquid side ball valve connecting: expand the copper tube outlet and connect the ball valve connector
3. Vacuum and charge in refrigerant, ensure to open the valve completely
4. Calculate the additional refrigerant and charge into units accordingly
5. Check the looseness to avoid leakage of refrigerant
Service Manual SM-MDS_(ii)
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