Friedrich ZoneAire Select PZH12K3SC handleiding

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Handleiding

R-32 SEALED SYSTEM REPAIRS

Refrigerant Charging

BURN HAZARD

Proper safety procedures must be followed,

and proper protective clothing must be worn

when working with a torch.

Failure to follow these procedures could

result in moderate or serious injury.

WARNING

FREEZE HAZARD

Proper safety procedures must be followed,

and proper protective clothing must be worn

when working with liquid refrigerant.

Failure to follow these procedures could

result in minor to moderate injury.

CAUTION

• Warning: Ensure sufﬁcient ventilation at the repair place.

Warning: Ensure there are no open ﬂame sources or hot surfaces that exceed 1200˚F in the work area.

1. Install a piercing valve to remove refrigerant from the sealed system. (Piercing valve must be removed from the system before recharging.)

2. Recover Refrigerant in accordance with EPA regulations. (Refer to Refrigerant Removal, Recovery, and Evacuation Section.)

3. Install a process tube to sealed system.

NOTE: Access valves must be removed after charging is complete to return this unit to a sealed system.

4. Evacuate the system to 1500 microns.

5. Repressurize to 50 PSI with nitrogen.

6. Evacuate the system to 1000 microns.

7. Repressurize to 50 PSI with nitrogen.

8. Evacuate the system to below 500 microns.

9. Turn off vacuum pump and conﬁrm microns do not rise above 1000.

10. Weigh in the refrigerant charge with the property quantity of R-32 refrigerant per model nameplate.

11. Start unit, and verify performance.

12. Crimp the process tube and solder the end shut.

NOTE: EPA Section 608 regulations require that if a system is charged with ﬂammable refrigerant it must have red markings on the access ports.

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