Specifications

19
EKO BOILER MANUAL
Example:
The EKO 25 is an 85K Btu boiler burning wood at 25% moisture content with 0.04iwc draft in the
chimney. By this calculation, the secondary air setting should be 3.5 turns out.
Blower inlets (top) and secondary air adjustment
on an EKO 60.
View behind the blower plate of the primary air in-
lets (top) and the secondary air tubes and valves.
What the Air Controls Do
The sliders on the blower (or blowers, depending on the model) determine how much air is available
to both primary and secondary combustion chambers. These openings are the sole source of air for
all combustion in the EKO boiler.
The primary air inlets determine how much air is available in the upper (primary) combustion cham-
ber, where the fuel undergoes pyrolysis.
The secondary air inlets reulate how much air goes into the steel tubes (shown in the photograph),
where it is superheated before being used by the nozzle (or nozzles) to achieve secondary combus-
tion (gasication).
Proper adjustment is critical to optimum boiler peformance. Smoke coming out of the chimney (if dry
wood is being burned and the fuel is properly positioned over the nozzle), usually indicates that not
enough air is reaching the secondary air tubes.
Note:
The steel plate upon which the fan (or fans) is mounted can be removed with 12 sheet metal screws
to gain access to the primary air inlet sliders (right photograph). When replacing the plate, be sure to
apply even pressure to all the screws to insure that the gasket forms a consistent seal. Failure to do
so will allow smoke to leak around the gasket and into the boiler room.