Rinnai RHFE-309FT Operation And Installation Manual page 9

SAFETY
During peak operating periods the filters
should be cleaned weekly, however if the
"FILTER" warning indicator flashes in the
control panel display, turn off the appliance
immediately and clean filters before further
use.
When the heater is operated for the first time
or after long periods of non use a slight odour
may be emitted, this is normal.
However if odours persist switch 'OFF' the
appliance and contact Rinnai.
Keep flammable materials, trees shrubs etc.
away from the flue terminal.
Snow Areas - in areas subject to heavy
snowfall, keep snow clear of flue terminal at all
times.
Rinnai Australia 6 Energysaver® - Operation & Installation Manual