TM 9-4120-385-14
9. If the superheat is within the specified limits:
(a) Disconnect the power supply.
(b) Remove thermometer.
(c) Slowly close the low pressure service valve.
(d) Remove the low pressure hose from the service valve after first slowly
releasing the hose pressure.
(e) Reinstall the access cover and secure with two screws.
c. REMOVAL.
WARNING
Use great care to avoid contact with liquid refrigerant or refrigerant
gas being discharged from any container under pressure. Sudden
and irreversible tissue damage can result from freezing. Wear
thermal protective gloves and a face protector or safety glasses in
any situation where skin or eye contact is possible.
Prevent contact of refrigerant gas with flame or hot metal surfaces.
Heat causes the refrigerant to break down and form carbonyl
chloride (phosgene), a highly toxic and corrosive gas. In case of
refrigerant leaks, ventilate area immediately.
1. Release refrigerant. Refer to Paragraph 5-5.
2. Cut tie straps securing excess sensing line.
3. Wrap expansion valve with wet rags to act as a heat sink during debrazing.
4. Nitrogen purge. Refer to Paragraph 5-6.
WARNING
The burning of polyurethane foam is dangerous. Due to the
chemical composition of a polyurethane foam, toxic fumes are
released when it is burned or heated.
If it is burned or heated indoors, such as during a brazing operation
in its proximity, precautions should be taken to adequately
ventilate the area.
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