Safety--2
T--304 04/08
SPECIFIC WARNINGS AND CAUTIONS
WARNING
Be sure to observe warnings listed in the safety summary in the front of this manual before per-
forming maintenance on the hvac system
WARNING
Read the entire procedure before beginning work. Park the vehicle on a level surface, with park-
ing brake applied. Turn main electrical disconnect switch to the off position.
WARNING
Do Not Use A Nitrogen Cylinder Without A Pressure Regulator
WARNING
Do Not Use Oxygen In Or Near A Refrigeration System As An Explosion May Occur.
WARNING
The Filter-drier May Contain Liquid Refrigerant. Slowly Loosen The Connecting Nuts And Avoid
Contact With Exposed Skin Or Eyes.
CAUTION
The AC310 & AC350 Rooftop Systems have R134a service port couplings installed on the compres-
sor and 1/4 inch flare (Acme) fittings installed on the unit piping.
CAUTION
To prevent trapping liquid refrigerant in the manifold gauge set be sure set is brought to suction
pressure before disconnecting.
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