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Safety Information
This manual includes warnings, cautions and notes.
DANGER conveys serious hazards for injury or death.
WARNING indicates risk of injury or death.
CAUTION warns of possible injury or damage.
NOTE calls out work practices that can result in optimal operations.
Warnings, cautions and notes include:
DANGER:To avoid the risk of electrical shock, personal injury or death, disconnect all electrical power to the unit before performing any maintenance
or service.The unit may have more than one electrical power supply. Assume all electrical wires are live, energized wires. Use lockout/tag outs.
DANGER: Use extreme caution when working around electrical components, wiring and connections to avoid injury or death by electric shock.
DANGER: Never remove a lockout from equipment unless you placed it there. Each person shall place his/her own lock/tag when required to isolate
an energy source. Do not start any adjustment, service or repair without verifying that the tag/lock out switch or control cannot be by-passed or over-
ridden. Verify that the locked-out switch or control cannot be overridden.Test the equipment to be certain that the locked-out switch is de-energized
and not simply malfunctioning. Press all start buttons to conrm that the equipmentWILL NOT start. Conrm that the system being serviced or
repaired is the system that has been locked out. Before restarting equipment, verify all tools and other items have been removed, all machine guards
are in place, all electric systems are reconnected, and personnel are clear of equipment.
DANGER: During installation, testing, servicing and troubleshooting this product, it may be necessary to work with live electrical components. Only
qualied licensed electricians or other properly trained persons may perform these tasks. Failure to follow all electrical safety precautions can result in
death or serious injury. All HVAC equipment must be installed per the National Electric Code (NEC) and/or all applicable state/local codes.
DANGER: Incorrect handling of HVAC equipment can result in explosions, electrical shock or re, causing property damage, injury and/or fatality.
DANGER: HVAC liquids and chemicals can be dangerous if used incorrectly or if spills or accidents occur. Handle detergents and solvents with care to
avoid spills and burns.
DANGER: Danger of explosion. Refrigerant cylinders can explode causing serious injury and/or death if not handled and stored properly.
WARNING: Only qualied, licensed electricians with proper personal protection equipment should wire Multistack chillers. Injury or death my result
if not properly wired due to electric shock hazard
WARNING: Danger of electrical shock. Many types of HVAC equipment have switches and regulators with electrical current on even when other parts
of the equipment appear to be turned o. Main circuit breakers must be turned o before servicing equipment to avoid injury, fatality.
WARNING: Be sure to use lifting slings with lifting capacity to safely handle unit weight. Consult the unit’s as-built submittal drawings for unit
weight data.
WARNING: If welding on chiller water connections, use proper electrical grounding to avoid damaging the compressors or chiller controls. Never
weld directly on the heat exchanger shells. Only an authorized ASME-certied repair agency may weld directly on ASME-certied shells. After weld-
ing, an“R”stamp is required.
CAUTION: Working with HVAC equipment can be hazardous due to electricity, moving parts, chemicals, combustion and other hazards. Use safe work
habits including proper tools and personal protective equipment. Understand and heed all safety information, installation guidelines and operation
and maintenance procedures.
CAUTION: Pressurized application of cleaning substances or refrigerants must be done with the correct procedures to ensure the safety of technicians
and others, and avoid property damage.
NOTE: Use correct tools for HVAC equipment installation, maintenance and adjustment. Use the correct tools to make tight connections without strip-
ping threads or breaking screws and bolts. Use accurate refrigerant and electrical meters to properly maintain and diagnose HVAC equipment.
