- Connect the high-pressure side of the cooling line to the red port on the gauge. ...
- Connect the low-pressure side to the blue port of the gauge. ...
- Attach a waste hose or vent hose to the center of the manifold set up. ...
- Attach micron meters or other gauges to the additional ports.
How do I recharge my AC with a manifold gauge?
Open valve on the refrigerant source. Open the low side valve on the manifold gauge set. Charge system until gauges read over 50 pounds of pressure. Close low side valve on the manifold gauge set.2019-07-23