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T -298
Safety-- i
SAFETY SUMMARY
GENERAL SAFETY NOTICES
The following general safety notices s upplement the specific warnings and cautions appearing e lsewhere in
this manual. They are recommended precautions that must be understood and applied during operation and
maintenance of theequipment c overed herein. The general s afety notices are presented in the following three
sections labeled: First Aid, Operating Precautions and Maintenance Precautions. A listing of the specific
warnings and cautions appearing elsewhere in the manual follows the general safety notices.
FIRST AID
An injury, no matter how slight, should never go unattended. Always obtain first aid or medical attention
immediately.
OPERATING PRECAUTIONS
Always wear safety glasses.
Keep hands clear of the evaporator blower and condenser fan.
No work should be performed on the unit until all circuit breakers and s tart--stop switches are turned off, and
power supply is d isconnected.
Always work in pairs. Never work alone.
In case of severe vibration or unusual noise, stop the unit and investigate.
MAINTENANCE PRECAUTIONS
Beware of unannounced starting of the evaporator blower & condenser fan. Do not remove the ceiling grill
assembly or the upper unit cover assembly before turning the power off, and disconnecting the power supply.
Before disconnecting, discharge capacitors by shorting across the capacitors terminals. (See Paragraph
3.5.8)
When disassembling wiring, use numbered stickers to identify wire leads and t erminals. This aids in quick,
accurate reassembly.
Be sure power is turned off before working onmotors, controllers, or electrical c ontrol switches. Taganycircuit
breakers and power supply to prevent accidental energizing of circuits.
Do not bypass any electrical safety devices, e.g. bridging an overload, or using any sort of jumper wires.
Problems with the system should be diagnosed and any necessary repairs must be performed by qualified
service personnel.
In case of electrical fire, open circuit switch and extinguish with CO
2
(never use water).
Use dry nitrogento pressurize thesystem for leak checking. Be careful not to exceed150 psig te st pressurein
the hermetic compressor .
Coil fins are sharp. Use care when removing the cover form the base pan to avoid personal injury.
Oil vapor in piping stubs can ignite from torch flame and c ause serious injury. Exercise extreme care when
brazing, and keep brazing cloth and fire extinguisher handy for emergency u se.
Disconnect power to the AirV unit before checking the capacitor.