ICE AIR FCHC Installation manual - page 12
Precautions and preparations listed are for general knowledge and to define basic guidelines. Local codes and existing practices should be observed and preformed by a professional.
Due to ICE AIRs ongoing product development programs, the information in this document is subject to change without notice.
System Cleaning and Flushing
Cleaning and flushing the unit is the most important step to ensure
proper start-up and continued efficient operation of the system.
Follow the instructions below to properly clean and flush the system:
1. Verify that electrical power to the unit is OFF.
2. Verify that supply and return riser service valves are closed at
each unit.
3. Fill the system with water, leaving the air vents open. Bleed all air
from the system, but do not allow the system to over flow. Check
the system for leaks and make any required repairs.
4. Adjust the water and air level in the expansion tank.
5. With strainers in place, start the pumps. Systematically check
each vent to ensure that all of the air is bled from the system.
6. Verify that make-up water is available and adjusted to properly
replace any space remaining when all air is purged. Check the
system for leaks and make any additional repairs if needed.
7. Set the boiler to raise the loop temperature to approximately
85°F (29.4°C). Open the drain at the lowest point in the system.
Verify that make-up water replacement rate equals rate of bleed.
Continue to bleed the system until the water appears clean or for
at least three hours, whichever is longer.
8. Completely drain the system.
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