Full Product Manual

28 Rinnai I-Series Condensing Combi Boiler User’s Informaon Manual
20
PSI
When freeze protecon is acve, the icon
shown below will illuminate.
Freeze Protecon Operaon
When the boiler detects low outdoor
ambient temperatures, the boiler will begin
its freeze protecon operaon. The freeze
protecon operaon can protect the boiler
from freezing down to as low as –22°F (-30°
C) outdoor temperature.
When freeze protecon is in operaon, the
pump may circulate water and/or the boiler
may operate to prevent the boiler from
freezing.
Ensure power and gas are supplied to the
boiler for freeze protecon to funcon.
The internal freeze protecon will not
necessarily prevent the system piping from
freezing.
During freeze protecon operaon, the
pressure and supply temperature will
alternately display on the controller.
The icon for CH and DHW may alternate
depending on the operaon of the freeze
protecon sequence.
When the system needs to be shutdown
for extended periods of me, the boiler
and all system piping should be drained.
The power and gas supply should then
be disconnected from the boiler.
Freezing damage may occur if there is
water remaining in the boiler or system
piping. The plumbing lines should also be
blown out via compressed air.