Fill the Piping
Purpose: The piping must be full of fluid and all air must be removed from the piping. Filling the
piping separately from the reservoir will help ensure a smooth startup.
To fill the piping, follow procedure below.
1. Verify supply and return ball valves are closed.
2. Remove cap from supply flush port and connect fill hose. Connect the other end of the hose to
external fill pump.
3. Remove cap from return flush port and connect hose. Place the other end of hose in a bucket.
4. Open the supply and return side flush valves and energize external fill pump to fill piping with
glycol mix.
5. When glycol mix begins to drain from return flush port, close the return side flush valve and
replace cap.
6. Use air purge valves at high points in the piping to allow air to escape while fluid continues to
fill the piping.
a. Open one purge point at a time.
b. When glycol mix comes out of the purge point, close air purge valves or isolation valve
to seal the piping from atmospheric pressure.
7. After all purge points are sealed, close the supply side flush valve, deenergize external fill
pump, and replace caps.
8. Open both supply and return ball valves.
To Next Page
Loading...
