Carrier 68G5-105 Series Operation & Service Manual page 4

SPECIFIC WARNINGS AND CAUTIONS
BE SURE TO OBSERVE WARNINGS LISTED IN THE SAFETY SUMMARY IN THE FRONT OF
THIS MANUAL BEFORE PERFORMING MAINTENANCE ON THE HVAC SYSTEM
DO NOT USE A NITROGEN CYLINDER WITHOUT A PRESSURE REGULATOR
DO NOT USE OXYGEN IN OR NEAR A REFRIGERATION SYSTEM AS AN EXPLOSION MAY
OCCUR.
EXTREME CARE MUST BE TAKEN TO ENSURE THAT ALL THE REFRIGERANT HAS BEEN
REMOVED FROM THE COMPRESSOR CRANKCASE OR THE RESULTANT PRESSURE WILL
FORCIBLY DISCHARGE COMPRESSOR OIL.
WHEN MOVING THE COIL CARE MUST BE TAKEN TO AVOID PERSONAL INJURY BE-
CAUSE OF THE WEIGHT OF THE COIL.
Do not under any circumstances attempt to service the microprocessor. Should a problem
develop with the microprocessor, replace it.
Care Must Be Taken To Ensure That The Manifold Common Connection Remains Immersed
In Oil At All Times Or Air And Moisture Will Be Drawn Into The System.
To prevent trapping liquid refrigerant in the manifold gauge set be sure set is brought to
suction pressure before disconnecting.
T-312
WARNING
WARNING
WARNING
WARNING
WARNING
CAUTION
CAUTION
CAUTION
Safety - 2