Purpose: To properly install gauges with low loss fittings.
1. Remove both the discharge and suction service valve stem caps. Save and re-use the caps and sealing washers or gaskets.
2. Make sure both service valves are back seated.
3. Remove the service port caps for both the suction and discharge service valves. Save and re-use the caps and sealing washers or gaskets.
4. Attach the high pressure gauge line to the discharge service port and secure the line fitting finger tight.
5. Turn the discharge service valve stem 1/4 turn (CW) to open the service port.
6. Open both manifold hand valves.
7. Slowly screw a 1/4 inch flare fitting into the center service line low loss fitting to purge the service line. Remove the flare fitting after purging. Secure line to manifold hose anchor.
8. Slowly screw a 1/4 inch flare fitting into the manifolds low pressure line low loss fitting to purge the line. Remove the flare fitting after purging.
9. Mid seat the suction service valve stem.
10. Close both gauge manifold hand valves.
NOTE: These gauges may be removed and re-installed on the same unit without additional purging if a slight positive pressure remains in the manifold and lines.
