TB-9-2320-279-13-1

TECHNICAL BULLETIN; AIR CONDITIONING SYSTEM

OPERATOR’S, UNIT AND DIRECT SUPPORT MAINTENANCE MANUAL, INSTALLATION INSTRUCTIONS, AND REPAIR PARTS AND SPECIAL TOOLS LISTS

DECEMBER 2005

TB-9-2320-279-13-1 - Page 370 of 524

TB 9-2320-279-13-1

0050-4

AC SYSTEM REFRIGERANT (R-134a) MAINTENANCE - Continued

DRAFT

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8. Select RECOVER and press ENTER on LCD screen (14).

9. Turn panel low side valve (15) and panel high side valve (16) to 3 o’clock position, then press START.

NOTE

As refrigerant is recovered, the panel gages will show increasing vacuum.

10. Recover refrigerant until the low side pressure gage (17) indicates 15 inHG, then press PAUSE.

11. Monitor low side pressure gage (17) for five minutes.

NOTE

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If pressure increases above vacuum (0 psi), perform Step 12, more recovery time is

required.

•

If there is no change in pressure after five minutes, proceed to Step 13, recovery is

complete.

12. Repeat Steps 8 through 11 until system pressure remains stable for 2 minutes, then press START to

continue recovering refrigerant.

13. Press EXIT, turn panel low side valve (15) and panel high side valve (16) to 12 o’clock position, then

press NEXT.

HEMAC193