Product Description; Safety Devices; Identification - Riello TAU 55 UNIT Installation And Maintenance Manual

PRODUCT DESCRIPTION

This TAU UNIT condensing boiler is designed to pro-
duce hot water for central heating systems. If used in
conjunction with a remote storage cylinder, it can also
produce domestic hot water. The innovative boiler body
uses the condensation of steam from the combustion
gases to recover up to 15% extra energy, with obvious
benefits in terms of running costs. The boiler body is
made from highly corrosion resistant stainless steel to
guarantee an extended working life and excellent reli-
ability. The boiler body conforms to the strictest Italian
and European standards governing the migration of
heavy metals to condensate. A premixed micro-flame
burner guarantees extremely low emissions.

SAFETY DEVICES

This TAU UNIT condensing boiler is equipped with the following safety devices:
An automatic safety thermostat that trips at 100° and
shuts down the burner.
An electronic safety system that monitors flow rate
through the central heating system using two sensors,
one on the flow pipe and the other on the return pipe.
This safety system forces the boiler to perform a safety
shutdown if flow rate is insufficient or not detected.
Flue gas safety thermostat.
A flue gas thermostat in the bottom of the heat exchanger
that triggers an error condition if flue gas temperature
exceeds 75°C. A flue gas temperature sensor in the
bottom of the heat exchanger that triggers a transient
(temporary) error if flue gas temperature exceeds 85°C
and a permanent error if it exceeds 90°C.
A fan safety system that uses a Hall effect speed sensor
to continuously monitor fan speed.

IDENTIFICATION

The boiler is identified by the following plates and labels:
- G20 label
RIELLO S.p.A.
Via Ing.Pilade Riello
737045 Legnago (VR) - ITALY
Caldaia a condensazione - Chaudière à condensation
Brennwertkessel - Condenserende verwarmingsketel - Kondenskjel
Cod.
230 V ~ 50Hz
Max. flue gas loss: 7 %
T067697GE
- Serial number plate
This specifies the
serial number,
model, and furnace
power.
6
GENERAL
- Data label
This lists the boiler's technical
specifications and performance.
Categoria:
Combustibile: Combustible:
Categorie:
Brandstof: Brennstoff:
Kategorie:
Drivstoff:
Kategori:
/
T067697GE
G25 BE
IP
P.min.G20= mbar
European Directive
92/42/EEC:
N°
η = η = η = η =
NOx:
Qn(min) =
kW kW
W
Pn(min) =
kW kW
Qn(max =
kW kW
> -
Pn(max) =
kW kW
Pms= bar T = °C
C63,C63x verboden in België - C63,C63x défendu en Belgique
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
Mod.
Cod. N°
Pms bar
Qn(max)
kW
The control system applies compensated control logic to
maximise energy recovery in all seasons. The combus-
tion gases are cooled to a temperature near that of the
central heating return before they leave the boiler body.
This makes it possible to use plastic flue pipes instead of
metal ones, with significant savings in overall installation
costs. Special accessories are available to increase the
number of central heating circuits served, to cascade a
number of TAU UNIT boilers and to connect single or
double return lines to suit the needs of the installation,
improving heat stratification in the water inside the body
and optimising performance.
b
The activation of a safety device indicates a poten-
tially dangerous malfunction in the modulation sys-
tem. 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.
Gas label
This is applied at the rear
of the boiler and specifies
the type of gas used by
the boiler, and the coun-
try in which the boiler is
destined for use.
Paese di destinazione:
B23P
Tipo di apparecchio :
II
Caldaia categoria : 2H3P
Pressioni di alimentazione gas:
G20 20 mbar
G31 37 mbar
Regolazione effettuata dal costruttore:
G20 - 20 mbar
ATTENZIONE
Questo apparecchio può essere installato e
funzionare solo in locali permanentemente
ventilati, in conformità alle normative vigenti.
Leggere attentamente il libretto istruzioni
prima di installare e mettere in servizio
l'apparecchio.
(Laterale DX)
068786_1_E4