IMPORTANT:
Any plastic or rubber tubing used with a Tarm Biomass boiler must have
an oxygen barrier, or boiler corrosion will occur. If radiant tubing
without an oxygen barrier is installed, water in the tubing part of the
heating system must be separated from the boiler. Separation of system
components is typically done by using a heat exchanger. Use of radiant
tubing without an oxygen barrier will void the boiler warranty.
All safety devices have to be installed in accordance with relevant
national and local codes and regulations and have to ensure that the
maximum water temperature and the maximum system pressure are
not exceeded. These conditions refer to pressurized heating systems.
Related safety devices to be installed are Pressure Relief Valves, a
closed and pressurized expansion tank and a proper gravity circuit at
least. In addition the Central Heating Boiler is equipped with an
Overheat Thermostat.
A circulator (Size and brand to be determined by the installer (not
provided)) should be installed as C3 per drawings suggested by Tarm
Biomass.
An aquastat (Honeywell L4008B (provided)) must be installed to protect
the boiler from overtemperature conditions by energizing a chosen
heating zone.
A tankless hot water coil is not available for the Froling FHG boiler.
Tarm Biomass recommends the use of the BLTCONTROL (available
through Tarm Biomass) when burning the wood boiler in conjunction
with a back up boiler. The BLTCONTROL is a three position control that
allows switching between wood only, wood with automatic back up, or
back up only, by controlling the operation of the back up auxiliary boiler.
BLTCONTROL takes input from a zone relay control and determines,
based on thermal storage system temperature, or second stage
thermostat reading, whether to pull heat from the thermal storage
system or the back up auxiliary boiler. The BLTCONTROL easily
integrates the wood boiler and thermal storage system with an existing
fossil fuel heating system.
A permanent pressurized domestic water supply must be provided with
proper automatic filling and pressure reduction valves.
• The boiler is not suitable for outdoor installation. It must be located in
a weather-tight, protected space.
If there is a risk of freezing for parts of the heating system all water
within these heating zones has to be frost-proof!
Minimum Return water temperature
If the return water temperature is below the minimum, a part of the
heated water output flow shall be mixed in.
A thermostatic mixing valve, set to open at 142°F (61°C), is required to
temper return water to prevent cold return water from reaching the
boiler. This valve helps prevent boiler corrosion. Tarm Biomass can
provide this valve or a loading unit, at an additional cost.
Installing the boiler without proper unit providing a minimum return
water temperature (e.g. Termovar loading valve or loading unit) can
cause condensation water and fuel residue combine to form an
aggressive condensate, leading to damage to the boiler!
Minimum return water temperature is 142°F (61°C)
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