for the HONEYWELL Braukmann FR 124 type regulator. The overheat protection function can be
monitored by checking the regulator’s functionality at temperature of 90 °C. At this temperature, the
control valve /8/ must be almost closed. It is necessary to seek and discover the best setting. You can
visually inspect the control valve’s /8/ position by looking from the rear side of the ventilator. The ven
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tilator is controlled by a control thermostat situated on the boiler’s panel. The regulation is based on the
pre-set outgoing temperature value. The temperature set on the thermostat should be 5 °C lower than the
temperature set on the FR 124 draught regulator. (Indicated by dots on the thermostat scale). The con
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trol panel also comprises of a waste gas thermostat which is used to switch the ventilator off when the
fuel has been combusted. When igniting, position to the “firing-up” position (minimum value). When
the fuel has sufficiently flared up, set it to the operating position in which the ventilator runs until the
fuel has completely burnt out. It is necessary to seek and discover an optimal position of the thermostat;
which depends on type of fuel, chimney draught and other conditions. The outgoing water temperature
should be monitored on the thermometer /18/ situated on the control panel. There is also an irreversible
safety thermostat on the panel. Wood supply gasification boiler DC50SE is not equipped with Honey
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well draught regulator FR 124 and typical regulation valve (aperture for FR 124 on the water outlet
from the boiler must be blinded). It is equipped with regulation valve with a servo-drive and spring
placed in the combustion air inlet. This valve is controlled with regulation and waste gas thermostat in
accordance with outlet water temperature; like the draught ventilator. When the thermostat is switched
off, it switches off automatically. Regulation valve is set by the manufacturer to a maximum opening of
30 mm. Maximum valve opening can be altered as necessary. This can change the boiler output and its
combustion. Boiler DC15E is not equipped with a ventilator, regulation, waste gas and safety thermo
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stat. Output regulation is carried out only with Honeywell FR 124 draught regulator, which controls the
regulation air valve. Panel on DC15E type is equipped with a switch and thermostat for a pump.
Draught regulator - HONEYWELL Braukmann FR 124 – Assembly instructions
Disassemble the lever /1/ and coupler /2/ and screw the regulator into
the boiler.
Setting
Heat the boiler to approx. 80 °C. Set the setting handle to the tem-
perature read on the boiler thermometer. Tension the air flap valve
chain in a way that provides the required boiler output; the gap at
the air (control) flap valve may range between 3 - 50 mm. The valve
minimum gap is set by a setscrew to 3 - 8 mm; boiler service-life pro-
longing feature, do not decrease. Otherwise, the boiler and ventilator
may get covered in tar and their service life would be reduced. In
cases where there are insufficient general draught conditions, slightly
increase the permissible minimum gap.
Draught regulator functional check
Set the setting handle to the required temperature of water exiting the
boiler (80 - 90 °C). When the water temperature reaches its maximum
of 95 °C, the control flap valve must be fully closed (only providing
the setscrew gap). It is always necessary to fine-tune the specified op
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erating temperature (80 - 90 °C) utilising the mixing valves behind the
boiler either manually or by electronic regulation with electric actuator.
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