Rinnai I Series, Installation And Operation Manual

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112 Rinnai I - Series Condensing Boiler Combi Manual
When replacing an existing boiler, the
heating system shall be flushed with an
approved system cleaner before the new
boiler is added to the system. If the old
boiler has already been removed, a bypass
must be piped in when the new boiler is
installed to facilitate the flushing of the
system.
The Rinnai boiler must be isolated from the
system while the system is flushed. No
system cleaner should ever enter the boiler
heat exchanger due to its caustic nature
which could damage the heat exchanger.
Reference section “ 14.1 Approved
Cleaners, Inhibitors and Antifreezes ” in the
Appendix for an approved list of system
cleaners, inhibitors, and antifreezes.
Instructions
1. Flush the CH system with water.
2. Isolate the boiler from the CH system.
3. Fill the CH system with an approved
cleaner and circulate through the system.
4. If the installation is a zone system (utilizes
multiple zones), flush out each zone
individually.
5. Flush the CH system with water again,
ensuring all zones have been flushed.
6. Clean out the dirt trap per manufacture ’ s
instructions.
7. The boiler and system may now be filled
through the fill valves.
8. If using glycol, ensure it is an approved
glycol and ratio.
9. Verify water quality is within the stated
values in section
“4.4.1 Water Quality
Guidelines. ”
IMPORTANT
•
Water should be within guidelines for
water quality listed in section
“ 4.4.1
Water Quality Guidelines. ”
•
Use the proper water treatment to
ensure the pH and water hardness are
within the Rinnai boiler water quality
guidelines listed in section
“ 4.4.1 Water
Quality Guidelines. ”
•
Test the pH of the water that will be
used for filling the system.