Mueller E-Star OESE 3.5 and 5 HP HFC Condensing Unit
Installation and Operation Manual, Part No. 8828747
Effective April 13, 2020
NOTE: SEE ALL SAFETY, WARNING, AND CAUTION LABELS SHOWN IN SECTION 12.0.
13.1 SAFETY ALERT
Improper handling or service of equipment containing refrigerant and/or powered by electricity can
create a health hazard. All installation, service, and/or maintenance must be performed by service
technicians who are trained and knowledgeable in proper refrigeration and electrical procedures.
This equipment can start automatically. Use extreme caution when servicing.
All guards and covers must be in place during operation to prevent mechanical and electrical hazards.
13.2 REFRIGERANT HEALTH HAZARDS
Although the toxicity and flammability of HFC refrigerant is low, the possibility of injury or death exists
in unusual situations or if it is deliberately misused. These refrigerant vapors are several times heavier
than air. Good ventilation must be provided in areas where high concentration of refrigerant vapors might
accumulate and displace oxygen.
Most halogenated compounds will decompose at high temperatures, such as those associated with
gas flames or electric heaters. The chemicals that result under these circumstances always include
hydrofluoric acid.
These dangerous vapors have a sharp, stinging effect on the nose and can be detected by odor at
concentrations below its toxic level. These odors serve as a warning that decomposition has occurred. If
detected, evacuate the area until ventilation has cleared the area of the decomposed vapors.
Skin or eye contact can result in irritation and frostbite.
13.3 FIRST AID
If refrigerant vapors are inhaled, remove victim to fresh air. If not breathing, give artificial respiration.
If breathing is difficult, give oxygen. Avoid stimulants. Do not give adrenaline (epinephrine), as this can
complicate possible effects on the heart. Call a physician.
In case of eye contact, flush eyes promptly with cool water for at least 15 minutes. Call a physician.
Soak exposed skin in lukewarm water, not cold or hot. Do not use dressings or ointments. Call a physician.
13.4 PERSONAL PROTECTIVE EQUIPMENT
Technicians handling refrigerants should wear side-shielded safety glasses, impervious (preferably
butyl-lined) gloves, and other protective equipment or clothing as required by the situation.
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Section 13.0 – Safety
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