Earth Klear Sky 400, Owner'S Manual, Page: 38 / 57

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correct.
The firmware is written in a State Machine format wherein
the inputs from the various sensors are read and processed.
Based on the data from these sensors as well as the
currently active State Machine state and also based on
elapsed time, the various machine states are activated and
deactivated.
PLEASE NOTE:
The Model 150 Catalytic Control System (CCS) is performing
properly when only moisture is visible from the stack.
PCD and IBC Maintenance
The person(s) operating the hydronic heater is/are
responsible for operation and warranty will be voided if
preventative procedures are inconsistent with the
ClearStak or Earth Outdoor Klear Sky manual.
Preventative
Catalyst
The catalyst (in the clean-burn catalyst housing) should be
inspected at the beginning of the burning season, and at
the end to ensure that it is working properly. During the
burning season, the catalyst should be inspected monthly,
or every 2 cords of wood burned. This is done by visual
inspection. If the catalyst appears to contain fly ash, it
should be cleaned out. This is usually caused when the
furnace ash levels have risen higher than bottom of the
door.
CAUTION: DO NOT REMOVE THE CATALYST IF IT IS
HOT.
Let it cool completely first. Removing the catalyst
while hot will ruin the seal around the catalyst and may
cause the individual removing it to be burned.