MANIFOLD GAUGE SET
R-12 and R-134a require separate and non-interchangeable service tools and equipment because the refrigerants and lubricants are not compatible and cannot be mixed even in the smallest amounts.
In addition, the quick joint design has been adopted for better serviceability.
Do not attempt to use same set of equipment and tools for both R-12 and R-134a because all equipment contains residual amounts of refrigerant and lubricant. This may cause contamination of A/C system circuit.
The use of incorrect equipment will result in refrigerant and/ or lubricant contamination when may cause A/C system or equipment failure.
Close both hand valves of manifold gauge set.
Install charging hoses of gauge set to service ports. Connect the low pressure hose to the low pressure service port in the suction pipe and the high pressure hose to the high pressure service port in the discharge hose.
Tighten the hose nuts by hand.