Rinnai M Series Installation And Operation Manual page 87

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Snow
Accumulation
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Freeze
Protection
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Coast Area Installations located in or near coastal areas may require additional maintenance
Installations due to corrosive airborne ocean salt. If corrosion is observed on the body of the
boiler, the boiler shall be inspected to ensure proper operation and repaired or
replaced, if necessary.
It is imperative that control compartments, burners, and circulating air
Cleaning
passageways of the boiler be kept clean. Check burner flame for proper color.
Once ignited, the flame must cover the surface of the burner. The flame must
burn with a clear, blue, stable flame. If the flame does not have this appearance,
complete the following steps:
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Condensate Trap Cleaning:
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AFTER SERVICING: VISUAL INSPECTION OF FLAME
Verify proper operation after servicing. The burner must flame evenly over the entire surface when
operating correctly. The flame must burn with a clear, blue, stable flame. See the parts breakdown
of the burner for the location of the view ports. The flame pattern should be as shown in the
images below:
SATISFACTORY
FRONT VIEW
FLAME ROD
BLUE FLAME
Rinnai M-Series Condensing Boiler Solo Manual
Verify the area around the flue terminal is free of snow and ice. The boiler will
not function properly if the combustion air or exhaust vent pipes are impeded
(blocked or partially blocked) by obstructions.
Verify the condensate drain line is free of snow and ice. Ensure the line is not
blocked or clogged and that condensate is flowing freely.
Freeze protection for new or existing systems must use glycol that is specially
formulated for this purpose. This includes inhibitors, which prevent the glycol
from attacking the metallic components. The glycol should be for multi-
metallic components. Reference section "14.1 Approved Cleaners, Inhibitors
and Antifreezes" in the Appendix for an approved list of system cleaners,
inhibitors, and antifreezes.
Check that the system fluid is correct for the glycol concentration and inhibitor
level. The system should be tested at least once a year and as recommended
by the producer of the glycol solution. The allowed maximum concentration is
50 percent.
Turn off and disconnect electrical power. Allow to cool.
Remove the front panel.
Use a vacuum to remove dust from the main burner and fan blades. Do not
use a wet cloth or spray cleaners on the burner. Do not use volatile
substances such as benzene and thinners; they may ignite or fade the paint.
Do not open the burner cabinet and touch the burner surface.
Inspect the condensate drain assembly inside the boiler and your external
drain system.
Remove any debris that may be present in the condensate removal system.
UNSATISFACTORY
FRONT VIEW
FLAME ROD
YELLOW OR GREEN FLAME
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