Carrier 19FA Instrukcje Operacyjne Pobierz pdf (Strona 39)

HVAC Training

Page : 39 of 42

Title:

Chiller Maintenance

Lesson Plan

NMH30C000105

OE 11587 - Failure of Control Room Ventilation System Chillers

1) What happened?

On 9/20/04, Operations personnel at Hope Creek identified a refrigerant leak after noticing the

formation of ice on a skid mounted CUNO filter. Immediate actions performed included securing

the chiller, evacuating the area for personal safety issues due to the presence of R-114 refrigerant,

and pumping down the chiller refrigerant charge to the storage vessel.

2) Why did it happen?

1) The leak occurred due to improper installation of the CUNO filter, 2) That the existing

maintenance procedure contained insufficient guidance for proper removal/installation of the filter

sump and for the replacement of CUNO filter elements, and 3) That the missing band clamp

probably did not contribute to the formation of the leak, although it does provide additional support

to the filter and copper refrigerant line.

3) Could this type event happen at PV? Are there any known equipment problems the can group

identify that may be applicable?

4) What could you do to prevent this from happening?

De mo

Demonstrate how the filters are disassembled and reassembled.

Be sure to point out the correct items including the o-rings.

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Carrier 19FA Instrukcje Operacyjne Strona 39