| Tweet |
Custom Search
|
|
|
||
 TM 55-1905-220-14-8
4-29. AIR CONDITIONING SYSTEM - MAINTENANCE INSTRUCTIONS (Continued).
(d) If liquid R-12 accidentally comes in contact with the eyes, take person suffering the injury to the
medical officer at once. Do not rub or irritate the eyes and give the following first aid treatment immediately:
1 Introduce drops of sterile mineral oil into the eyes as an irrigant.
2 If irritation continues at all, wash the eyes with a weak boric acid solution, or a sterile salt solution not
to exceed 2% sodium chloride.
(e) Should liquid R-12 come in contact with the skin, treat the injury the same as though the skin had
been frost bitten or frozen.
(f) Do not work in a closed space where R-12 may be leaking unless adequate ventilation is provided.
(g) Should a person be overcome in a space which lacks oxygen because of high concentrations of R-12
being present, treat such person the same as for suffocation, i.e., through artificial respiration.
e. Operating Procedures.
(1) Starting.
Proceed as outlined below to start the condensing unit:
CAUTION
When starting the compressor, avoid rapid pumping down of the low pressure side.
Rapid evacuation may pull the oil from the compressor crankcase. A variable
percentage of refrigerant is always mixed with the oil in the crankcase and is
subject to evaporation at lowering pressures. Rapid boiling of the refrigerant and
consequent high velocity gas will carry large percentages of oil. The crankcase oil
may leave with the evaporating refrigerant and circulate through the system with
perhaps consider- able delay in returning to the crankcase. If the oil is pulled from
the crankcase as described, do not run the compressor without lubricant. Stop the
compressor and add oil temporarily. The added oil, may later be removed on
evidence of an excess in the crankcase.
4-864
|
||
|
||
