Johnson Controls A-4400 Series User Manual

18 Air Dryers—A-4400 Series Technical Bulletin
4. Using a vacuum pump, evacuate any remaining air and moisture.
5. Charge the unit with R-134a refrigerant to within 1/4 ounce of the
amount specified on the air dryer nameplate.
6. Remove the charging manifold and replace the cap securely on the
service valve.
7. Reinstall the A-4400 cover and reconnect the power supply to the air
dryer.
8. If the evaporator pressure (gauge reading plus correction) does not
return to normal as illustrated in Figure 5, adjust the expansion valve
as described in the Refrigeration Service section.
Cap
Figure 8: Service Valve Detail for Access to Evaporator

Johnson Controls A-4400 Series Specifications

General

Brand	Johnson Controls
Model	A-4400 Series
Category	Dehumidifier
Language	English