Carrier 50TCM Series Installation, Operation And Maintenance Manual page 4

WARNING
ELECTRICALSHOCK HAZARD
Failure to follow this warning could cause personal injury, death
and/or equipment damage.
Before performing service or maintenance operations on unit,
always turn off main power switch to unit and install lockout tag.
Unit may have more than one power switch.
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal injury, death
and/or equipment damage.
Puron® (R-410A) refrigerant systems operate at higher pressures
than standard R-22 systems. Do not use R-22 service equipment
or components on Puron refrigerant equipment.
WARNING
PERSONAL INJURY AND ENVIRONMENTAL HAZARD
Failure to follow this warning could cause personal injury, death
and/or equipment damage.
Relieve pressure and recover all refrigerant before system repair
or final unit disposal.
Wear safety glasses and gloves when handling refrigerants. Keep
torches and other ignition sources away from refrigerants and oils.
CAUTION
Failure to follow this warning could cause personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing, safety glasses and gloves
when handling parts and servicing furnaces.
CUT HAZARD
Page 4