Bonus Plus Instructions Tarm Biomass 1-800-782-9927 Version 11/14 Page 10
2.2.3 Safety Systems
The Bonus Plus comes with safety systems to prevent the following:
Pressure in the boiler exceeding 30 psi (2 bars) (over pressure)
Boiler water temperature exceeding 212 ºF (100 ºC)
To prevent an
over-pressure
condition, an ASME stamped pressure relief valve (provided) must be
installed on the boiler which opens at 30 psi to relieve the boiler pressure
(See Section 3.5.1). Normal
pressure in the boiler should be 12-15 psi.
On the control panel there is an overheat thermostat. If the boiler exceeds (212 ºF) 100 ºC it will shut
off the fan to the boiler.
A gravity over-heat dump loop is also required. In the event of a power failure this loop should provide
dissipation for at least 10% of the boiler’s maximum rated output, assuming an ambient temperature of
65 ºF. in the area heated by the loop, and a mean water temperature of 180 ºF (82 ºC)
(See Section
3.4.2).
2.2.4 Accessories
The boiler is shipped with loose and installing parts. See
Section 3.3.2
for a complete listing of these
parts. Cleaning tools are provided with the boiler.
A
barometric damper
(draft stabilizer) is available for regulating chimney draft.
Plumbing around the boiler must include a three-port mixing valve in the orientation shown on instal-
lation drawing. The valve must be a
Termovar Model 4440A-3, Lk810
or equivalent with a 72 ºC
element. Tarm Biomass provides this valve at an extra cost.
A
flue thermometer
(Part #339N)
is highly recommended to help monitor the performance of the
Bonus Plus. This part is available from Tarm Biomass .
A
Thermal Storage System
is available from Tarm Biomass.
.
Product Description and Requirements for Safe Operation > Safety Systems