THERMITAL THE/TG 3S
steel boilers are high efficiency
triple flue pass boilers for central heating systems. When
combined with a storage cylinder, they can also be used
to produce domestic hot water.
THERMITAL THE/TG 3S
boilers are monobloc boilers
with pressurised combustion. The flame from the burner
first enters the furnace (1
st
flue pass). Via an opening at
the other end of the furnace, the combustion gases then
enter a duct that takes them back towards the front of the
boiler (2
nd
flue pass).
This separation between the combustion gas return duct
and the furnace makes a major contribution to reducing
Nox emissions. Combustion gases remaining in the high
temperatures of the furnace is one of the main reasons
for the formation of NOx emissions.
At the front of the boiler, the combustion gases pass
through a recess in the door insulation and exit through
the tube bundle (3
rd
flue pass).
In the tube bundle, turbulators force the combus-
tion gases into a vortex-like path that improves the
efficiency of convection heat exchange. This system
achieves maximum heat absorption without risking dam-
age through thermal stress.
Once out of the tube bundle, the flue gases pas through
a chamber at the rear of the boiler, and into the vent flue.
Their special design (with tube bundle over the combus-
tion chamber) makes these boilers far narrower than
conventional pressurised boilers and therefore easier to
install in boiler rooms with narrow doors or where space
is limited.
The burner is installed in a hinged door to permit the
adjustment and servicing of both boiler and burner with-
out having to remove the burner.
The boiler body is thermally insulated by high efficiency
mineral wool insulation that reduces heat loss to an
extremely low level.
The boiler casing is made from pre-painted panels lined
with mineral wool insulation.
Max. permissible return temperature with a gas burner:
50°C
Max. permissible return temperature with a fuel oil
burner: 37°C
1
2
3
4
5
6
7
8
9
10
13
11
12
1 - Door hinge
2 - Central heating return
3 - Central heating flow
4 - Safety device fitting
5 - Flue gas box
6 - Flue gas exhaust
7 - Access door for cleaning the flue gas box
8 - Condensate drain
9 - Boiler drain
10 - Door
11 - Flame inspection window
12 - Burner plate
13 - Control panel
MODELS UP TO 400 KW USED WITH FUEL OIL BURNERS CONFORM TO THE ENERGY-RELATED PRODUCTS
DIRECTIVE 2009/125/EC AND TO THE EU DELEGATED REGULATION 813/2013
6
ENGLISH
GENERAL
PRODUCT DESCRIPTION
