Chapter 1: Introduction
CAUTION 
Never work on electrical equipment unless another person who is familiar with the operation and hazards of the equipment and is competent in administering first aid is nearby.
CAUTION 
All personnel working on or near equipment should be familiar with hazards associated with electrical maintenance. Safety placards/stickers are placed on the unit to call attention to all personal and equipment damage hazard areas.
WARNING 
Refrigerant (R410A) is used with this equipment. Death or serious injury may result if personnel fail to observe proper safety precautions. Great care must be exercised to prevent contact of liquid refrigerant or refrigerant gas, discharged under pressure, with any part of the body. The extremely low temperature resulting from the rapid expansion of liquid refrigerant or pressurized gas can cause sudden and irreversible tissue damage.
As a minimum, all personnel should wear thermal protective gloves and
Exposure of refrigerant to an open flame or a very hot surface will cause a chemical reaction that will form carbonyl chloride (hydrochloric/hydrofluoric acid); a highly poisonous and corrosive gas commonly referred to as PHOSGENE. In its natural state, refrigerant is a colorless, odorless vapor with no toxic characteristics. It is heavier than air and will disperse rapidly in a
Always refer to the manufacturer’s Material Safety Data Sheet (MSDS) provided with the unit.
CAUTION 
Certain maintenance or cleaning procedures may call for the use and handling of chemicals, solvents, or cleansers. Always refer to the manufacturer’s MSDS prior to using these materials. Clean parts in a
CAUTION 
Do not use cleaning solvents near open flame or excessive heat. Wear eye protection when blowing solvent from parts. The
WARNING 
When performing brazing or
CAUTION 
The
CAUTION 
Cooling coils (and associated piping circuits) are pressurized and sealed when they leave the factory. Before installing the interconnecting piping, observe appropriate safety precautions and release the pressure via an available stem valve or Schrader® valve before uncapping the pipes.
CAUTION 
After interconnecting piping is installed, you must clean the piping system. If you use solvents/cleaning solutions, be sure they are completely flushed from the piping before connecting it to the unit. Failure to do so will result in equipment problems.
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