GMC 1976 ZEO 6083 Maintenance Manual page 744

INSIDE CONTROL PANEL
A-4778
Figure 8-Duo-Therm Air Conditioner Exploded View
Under some circumstances R-22 can be danger-
ous. The following warnings describe those circum-
stances . Careful attention must be paid to these
WARNINGS during servicing and testing.
WARNING : ALWAYS WEAR GOGGLES WHEN
OPENING THE REFRIGERATION SYSTEM. RE-
FRIGERANT LIQUID OR GAS CAN PERMA-
NENTLY DAMAGE THE EYES.
WARNING :
NEVER APPLY HEAT FROM A
TORCH TO A SEALED REFRIGERATION SYS-
TEM . REFRIGERANT WILL EXPAND RAPIDLY
WITH HEAT AND COULD CAUSE AN EXPLO-
SION . (THE PROCESS TUBE MAY BE SILVER
SOLDERED AFTER BEING CRIMPED NEAR THE
END) .
SAFETY WARNINGS
ROOF MOUNTED AIR CONDITIONER
24E- 5
1
1a
t
Figure 9-Mark IV Air Conditioner Exploded View
WARNING: REFRIGERANT 22 IN THE PRES-
ENCE OF AN OPEN FLAME PRODUCES PHOS-
GENE GAS-A TOXIC LUNG IRRITANT-DO
NOT BREATH IT. VENTILATE SERVICE AREA
IMMEDIATELY WHEN R-22 IS DISCHARGED.
WARNING : DO NOT USE REFRIGERANTS
OTHER THAN R-22, NEVER USE METHYL CHLO-
RIDE REFRIGERANTS, WHICH
CAUSE A
CHEMICAL REACTION WITH ANY ALUMINUM
PART OF THE SYSTEM, RESULTING IN THE
FORMATION OF PRODUCTS WHICH BURN
SPONTANEOUSLY ON EXPOSURE TO AIR OR
DECOMPOSE WITH VIOLENCE IN THE PRES-
ENCE OF MOISTURE .