Carrier 19FA Instrukcje Operacyjne Pobierz pdf (Strona 13)

HVAC Training

Page : 13 of 42

Title:

Chiller Maintenance

Lesson Plan

NMH30C000105

A total volume of 8 gallons of oil in the chiller seems a little low for a chiller with the oil level in the

upper portions of the upper site glass. It may be possible that the oil volume accounting for this

chiller may not be correct. A contributing factor may have been the condition of the chiller bull’s

eye type site glasses to prevent identifying a problem before it caused a problem. It has also been

reported that the upper and lower oil sump site glasses are scratched, cloudy, and difficult to read.

CMWO 2686282 was issued to replace the oil sump site glasses and the work was scheduled to

start on July 19, 2004. The refrigerant will be transferred to the storage tanks and the oil in the

sump removed under this work order. C MWO 2686282 will reset the chiller oil inventory on chiller

2MWCNE02 so the total oil volume in the chiller needs to be documented in the weekly chiller log

for the future.

A note has been added to the cover page on the work order that this work order is a disposition

document for CRDR 2707508.

Another issue concerning chiller oil was documented in CRDR# 2631597. The oil used to trim the level of the

normal chillers was contaminated with water. The oil is stored in the five gallon buckets on the aux roof of each

unit. Once the five gallon containers are opened the oil starts to get contaminated with moisture.

CRAI #2632787 documents that the shop took an action to purchased and dedicate oil

addition equipment for each type of oil used for the Normal Chillers (ie pumps, hoses).

Additional flame cabinets were purchased for each aux roof to store the oil and equipment in. The

plan was to use one gallon containers to transport and store the chiller oil.

Ask the students to provide feedback on the success of this CRAI.

Logging the chiller readings should be more than just looking at the temperature and pressure

indicators and recording a value. This is a performance check of the chiller when it is operating and

a verification of it's readiness when it is shutdown.

What could cause the oil te mperature/level to be out of spec?

CRDR # 2550482 documents an occurrence of the oil sump te mperature high on 1MECBE01

Chiller.

The description of the event:

The Area 4 Operator found the essential chiller 1MECBE01 oil sump temperature high outside the

normal band at 159 °F (normal band is 130 - 150 °F) on August 27,2002.

Unit 1 was in an "A" Train work week with A train aux feedwater INOPERABLE. The EC chiller lube

oil pump was started manually and oil temperature decreased to within spec.

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Carrier 19FA Instrukcje Operacyjne Strona 13