GENERAL
6
These
TAU UNIT OIL
boilers are high efficiency, fuel oil
burning condensing boilers for heating. They can also
produce domestic hot water if an optional remote storage
cylinder is installed.
These boilers may be used as type “C” boilers if the com-
burent air inlet is extended to draw in air from outside the
room where they are installed.
Used in conjunction with suitable optional water circuit
and electrical kits, these boilers can be used to serve up
to two central heating circuits (zones).
The most important technical features of these boilers are:
- The combustion chamber and heat exchange system
are specially designed and shaped to achieve the best
possible volume ratio.
- The primary heat exchanger features vitrified steel pi-
pes and wave turbulators to recover and transfer a large
proportion of the thermal energy carried by the combu-
stion fumes.
- The secondary heat exchanger is made from AISI 904L
stainless steel and recovers latent heat from the fumes,
boosting efficiency to up to 100.7% (50°C-30°C).
The exclusively designed heat exchange unit and se-
condary exchanger are insulated by ultra-efficient high
density glass wool. The controls and safety devices in the
electronic control panel conform to all applicable techni-
cal and safety standards.
A highly flexible controller permits an additional zone to
be served directly and also permits integration with
r
solar heating systems without additional controllers.
TAU UNIT OIL
r
boilers are equipped with the following safety devices:
-
A safety valve
that opens if pressure in the heating
circuit rises above the 3 bar threshold.
-
A safety thermostat
that forces the boiler to perform
a safety shutdown if temperature exceeds the safety
threshold (110°C).
-
A flue gas thermostat
in the bottom of the secondary
heat exchanger that triggers a fault condition if flue gas
temperature exceeds 90°C.
-
Burner safety device:
The fuel oil burner is equipped
with an electronic device to monitor correct implemen-
tation of the selected program. In the event of a fault,
this device sends the control panel a burner lockout
signal and displays a precise diagnostic signal.
b
The intervention of a safety device indicates a
potentially dangerous malfunction in the system,
and means that you must contact
r
’s Technical
Assistance Service immediately.
You may attempt to restart the boiler after a short delay
(see Preparing for initial start-up).
a
Never start the boiler up even for a short period if
the safety devices are not functioning correctly or
have been tampered with.
b
Safety devices must only be replaced by
r
’s
Technical Assistance Service using original spare
parts. Refer to the spare parts catalogue supplied
with the boiler.
Always check that the boiler is functioning correctly after
any repairs.
Safety devices
SAFETY DEVICES
Product description
PRODUCT DESCRIPTION
