5
Secondary System Purging
Typically boiler manufacturers want to make sure that any foreign
matter (dirt, shavings, PTFE thread tape, etc.) is fl ushed out of the
Hydronic Piping System before fl uid begins to fl ow between the
boiler and the piping system.
To purge the secondary system the following is needed:
•
A hose w/ 3⁄4” hose thread connection
•
A water source
•
Power to the circulator pump in the secondary loop
1.
Turn the lever handles on both Hydro-
Core ball valves so that they are
parallel to the fl ange and the main
valves are in the closed position.
This will prevent any debris from
entering the near boiler loop during
fl ushing. If multiple circuits are
present, repeat for each circuit.
8.
Close the purging valve on the
drain in the secondary loop.
9.
Remove the hose and replace the cap.
10.
Open the main valve on the drain
valve in the secondary loop.
6.
Turn on the circulator pump in the
secondary system to purge the
entire loop with fresh water.
7.
Once the debris has been purged
out and the drainage from the hose
runs clear, turn off the circulator.
2.
Close the main valve and
remove the cap from the drain
valve in the secondary loop.
3.
Connect the hose to the
purging port on the drain valve
in the secondary loop.
4.
Direct the other end of the
hose into a bucket or drain.
5.
With the main water supply on
and fl owing into the system,
open the purging valve on the
drain in the secondary loop.
11.
Return the lever handled ball
valves on the Hydro-Core manifold
to their normal operating position
(handles perpendicular to the
fl ange). Repeat for each circuit.
