R134a manifold gauge set instructions

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1. Open the HIGH and LOW manifold valves using the Red and Blue hand valves and start the vacuum pump. 2. Connect red adapter to high side service port (4). • Start engine. Turn A/C mode selector to HIGH and fan to HIGH. • Observe pressure on the manifold gauges and How to Set Up Manifold Gauge Set · Start by setting the reading. If using analog gauges, that means rotating the screw on the face of the manifold until theMANIFOLD OPERATING INSTRUCTIONS. ATD-3691. R134A BRASS MANIFOLD GAUGE SET. WARNING: Always wear safety goggles when working with refrigerants. PRE-SERVICE INSTRUCTIONS. 1. Close both valves on the manifold gauge set by turning the high and low knobs clockwise. 2. The gauges are correctly calibrated