gForce Ultra IOM
109
Refrigerant Filter Drier
Factory installed refrigerant filter driers do not normally require maintenance. When replacing
compressors or other repairs that open the refrigeration system to atmosphere, it is advisable to replace
the filter drier. The equivalent type and size should be used.
Check the color code of the moisture indicator on the sight glass. A positive indication means the filter-
drier should be replaced. If the drier is frosted or if there is a perceptible temperature change between
the liquid line entering and leaving the drier, an excessive pressure drop in the drier is indicated, and
the drier should be replaced.
Electrical Control Enclosure
DANGER: The inside of the electrical control enclosure contains high
voltage components and wiring. Access should be limited to authorized
personnel.
Arc flash and electric shock hazard. Risk of electrical shock could result in
injury or death. Disconnect local and remote facility power source before
working within this equipment.
Wear appropriate personal protective equipment per NFPA 70E before
working within unit.
Use voltmeter to make sure facility electrical power is turned OFF before
making any electrical connections. Failure to comply can cause injury or
death.
• Inspect electrical control panel box each year or after a short circuit occurrence.
• If there is an accumulation of dust and dirt, clean out the panelboard by using a brush,
vacuum cleaner, or clean lint-free rags. Avoid blowing dust into circuit breakers or other
components. Do not use a blower or compressed air.
• Visually check all conductors and connections to be certain that they are clean and secure.
Loose and/or contaminated connections increase electrical resistance which can cause
overheating. Such overheating is indicated by discoloration or flaking of insulation and/or
metal parts. Pitting or melting of connecting surfaces is a sign of arcing due to a loose or
otherwise poor connection. Parts which show evidence of overheating or looseness should
be replaced if damaged. Tighten screws or bolts and nuts to component manufacturer’s
torque specifications.
• Contactors should be kept clean and free from dust and other accumulated deposits. Dust
can be removed from the contactor by blowing with dry air that is free from lubricants.
• Check for hairline cracks in contactors, transformer, auxiliary contact mounting bracket, etc.
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