13-2. Refrigerant Recovery
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
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 | |||
|
|
13-4. Evacuation Using Vacuum Pump
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 | |
Valve | Valve | ||
| |||
| Fully OPEN |
| |
Position – a – |
| * |
CLOSED
Position – b –
*
Fig. 3 | * Hose |
66