© 2023 Emerson Climate Technologies, Inc.
IMPORTANT SAFETY INFORMATION
Those involved in the design, manufacture, and installation of a system, system purchasers, and service personnel
may need to be aware of hazards and precautions discussed in this section and throughout this document. OEMs
(Original Equipment Manufacturers) integrating a condensing unit into a system should ensure that their own
employees follow this bulletin and provide any necessary safety information to those involved in manufacturing,
installing, purchasing, and servicing the system.
Responsibilities, Qualifications and Training
OEMs are responsible for system design, selection of appropriate components, integration of this component into
the system, and testing the system. OEMs must ensure that staff involved in these activities are competent and
qualified.
OEMs are also responsible for ensuring that all product, service, and cautionary labels remain visible or are
appropriately added in a conspicuous location on the system to ensure they are clear to any personnel involved in
the installation, commissioning, troubleshooting or maintenance of this equipment.
Only qualified and authorized HVAC or refrigeration personnel are permitted to install, commission, troubleshoot and
maintain this equipment. Electrical connections must be made by qualified electrical personnel.
Observe all applicable standards and codes for installing, servicing, and maintaining electrical and refrigeration
equipment.
Terminal Venting and Other Pressurized System Hazards
If a compressor’s electrical terminal pin loses its seal, pressurized oil, refrigerant, and debris may spray out. This is
called “terminal venting”.
The ejected debris, oil, and refrigerant can injure people or damage property. The oil and
refrigerant spray can be ignited by electrical arcing at the terminal or any nearby ignition
source, producing flames that may project a significant distance from the compressor.
The distance depends on the pressure and the amount of refrigerant and oil mixture in
the system. The flames can cause serious or fatal burns and ignite nearby materials.
Each compressor has a terminal cover or molded plug that covers electrical connections.
The cover or plug helps to protect against electric shock and the risks of terminal venting. If terminal venting occurs,
the cover or plug helps contain the spray of refrigerant and oil and reduces the risk of ignition. If ignition occurs, the
plug or cover helps contain the flames. However, neither the terminal cover nor the molded plug can completely
eliminate the risk of venting, ignition, or electric shock.
See http://www.Climate.Emerson.com/terminal
for more details about terminal venting.
Additionally, a compressor’s refrigerant lines keep refrigerant and oil under pressure. When removing or recharging
refrigerant from this component during service, this can pose a pressurized fluid hazard.
POE Oil Hazards This equipment contains polyolester (POE) oils. Certain polymers (e.g., PVC/CPVC and
polycarbonate) can be harmed if they come into contact with POE oils. If POE oil contacts bare skin, it may cause
an allergic skin reaction.
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