Refrigerant Recovery, Service on Outdoor Unit

13-2. Refrigerant Recovery

13-2-1.Open service valve to recover refrigerant into refrigerant recovery unit.

CAUTION

Refrigerant released into the air contributes to destruction of our planet’s ozone layer. You should always use the refrigerant recovery unit to help protect the environment.

13-3. Service on Outdoor Unit

13-3-1.After making sure that the refrigerant in the circuit has been completely discharged, perform required servicing, such as replacing the compressor or repairing refrigerant leaks.

13-3-2.Before going on to the next step, leak test all joints where welding has been done.

NOTE

Nitrogen gas is best when pressurizing the system for a leak test. However, if it is necessary to instead test with refrigerant gas, be sure to recover all gas into the refriger- ant recovery unit after completing the leak test.

Outdoor unit

	Manifold valve
Pressure	Lo	Hi
gauge	Lo	Hi
gauge

13-4. Evacuation Using Vacuum Pump

13-4-1.Using a hex wrench, set the valve stems of the narrow and wide tube service valves as indicated in the table below.

Service Valve

Valve Position

Narrow

Position – a –

Wide

Vacuum pump

Fig. 2

NOTE

Refer to Service Valve Construction shown in Fig. 3.

Action	Narrow Tube Service	Wide Tube Service
Action	Valve (2-Way)	Valve (3-way)
	Valve (2-Way)	Valve (3-way)
	Fully OPEN
Position – a –		*

CLOSED

Position – b –

Fig. 3

* Hose

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