Riello TAU 115 N Owner's manual

INSTALLATION, OPERATION, MAINTENANCE
AND SYSTEM MANAGEMENT MANUAL
STAINLESS STEEL
CONDENSING
BOILER
115 N ÷ 1450 N
150 NC ÷ 1450 NC
TAU

2
TAU boilers conform to the Efficiency Directive 92/42/EEC,
to Gas Directive 2009/142/EEC and applicable sections of the Electromagnetic
Compatibility Directive 2014/30/UE and Low Voltage Directive 2014/35/UE.
Models up to 400 kW conform to the Energy-Related Products Directive 2009/125/EC and to the EU
Delegated Regulation 813/2013.
CONFORMITY
RANGE
MODEL CODE
TAU 115 N 20120144
TAU 150 N 4031860.0
TAU 210 N 4031861.0
TAU 270 N 4031862.0
TAU 350 N 4031863.0
TAU 450 N 4031864.0
TAU 600 N 4031865.0
TAU 800 N 4031866.0
TAU 1000 N 4031867.0
TAU 1250 N 4031868.0
TAU 1450 N 4031869.0
TAU 150 NC 4031835.0
TAU 210 NC 4031836.0
TAU 270 NC 4031837.0
TAU 350 NC 4031838.0
TAU 450 NC 4031839.0
TAU 600 NC 4031849.0
TAU 1450 NC 20043757
i.

3
Dear Customer,
Thank you for choosing a rTAU stainless steel condensing boiler. You have purchased a
quality, high efficiency boiler that will give you dependable and safe service and provide comfort
in the home for many years to come. Arrange for your boiler to be serviced regularly by an autho-
rised rTechnical Assistance Centre. Their personnel are specially trained to keep your boiler
efficient and cheap to run. Technical Assistance Centres also stock any original spare parts that
might be required.
This instruction manual contains important instructions and precautions that must be observed to
ensure the trouble-free installation and efficient functioning of your rTAU boiler.
Please accept our renewed thanks for your purchase.
Riello S.p.A.

4
CONTENTS
This manual, Code Doc-0053772 - Rev. 33 (05/16) is
made up of 44 pages.
The following symbols are used in this manual:
b CAUTION! = Indicates actions that require cau-
tion and adequate preparation
aSTOP! = Identifies actions that you MUST NOT do
GENERAL Page
General safety information 5
Safety precautions 5
Product description 6
Control panels 7
Recommended burners and technical specifications 8
Product identification 15
Accessories 18
SYSTEM MANAGER
Initial start-up 16
Preparing for extended periods of disuse 17
Cleaning 18
Maintenance 18
Useful information 19
INSTALLER
Unpacking the product 20
Overall dimensions and weights 21
Handling 21
Place of installation 22
Water in the central heating circuit 23
Water connections 25
Condensate drain 29
Condensate neutralisation 29
Combustion gas exhaust 31
Installation in B23P configuration 31
Door hinges 32
Changing the direction of door opening 32
Removing the hinge assembly “B” 33
Earth connection 34
Fitting the panelling 35
TECHNICAL ASSISTANCE SERVICE
Preparing for initial start-up 36
Initial start-up 37
Checks during and after initial start-up 38
Maintenance 39
- Opening the door 39
- Adjusting the door 39
Cleaning the boiler 40
Troubleshooting 41
CONTENTS

5
GENERAL
TAU boilers are delivered in separate crates.
Check that the appliance is complete and unda-
maged as soon as you receive it. Report any
discrepancies or damage to the rdealer who
sold it.
This rTAU boiler must be installed by a legally
qualified installer. On completion of the installation,
the installer must issue the owner with a declara-
tion of conformity confirming that the installation
has been completed to the highest standards in
compliance with the instructions provided by r
in this instruction manual, and that it conforms to all
applicable laws and standards.
This boiler must only be used for the purpose spe-
cified by rand for which it is designed. r
declines all responsibility, contractual or other, for
damage to property or injury to persons or animals
caused by improper installation, adjustment, main-
tenance or use.
If you notice any water leaking from the boiler, imme-
diately disconnect it from the mains electricity supply,
shut off the water supply, and notify r’s Technical
Assistance Service or a qualified technician.
Periodically check that operating pressure in the
heating circuit is over 1 bar but below the maxi-
mum limit specified for the appliance. If this is
not the case, contact r’s Technical Assistance
Service or a professionally qualified technician.
If the boiler is not going to be used for an extended
period of time, contact r’s Technical Assistance
Service or a qualified technician to have the fol-
lowing minimum preparation carried out.
- Switch the appliance OFF at the control panel and
mains power switches
- Close the gas cock and heating water cock
- Drain the central heating circuit if there is any risk
of freezing.
The boiler must be serviced at least once a year.
This instruction manual is an integral part of the
boiler. It must be kept safe and must ALWAYS
accompany the boiler, even if it is sold to another
owner or transferred to another user or to another
installation.
If you damage or lose this manual, order a
replacement immediately from r’s Technical
Assistance Service.
Do not allow children or infirm persons to operate
this rTAU boiler unsupervised.
Do not operate any electrical devices or
equipment, including switches or domestic
appliances, etc., if you can smell gas or fumes. If
you detect any suspicious smells:
- Ventilate the room by opening all doors and win-
dows.
- Close the gas shut-off cock
- Report the fault immediately to r’s Technical
Assistance Service or a professionally qualified
technician.
Do not touch the boiler while barefoot or wet.
Never clean or service the boiler without first
disconnecting it from the mains electricity supply
by turning the main power switch and the control
panel switch OFF.
Do not tamper with or adjust the safety or control
devices without prior authorisation and instruc-
tions from the boiler’s manufacturer.
Never pull, disconnect, or twist the electrical
cables coming from the boiler even if it is discon-
nected from the mains electricity supply.
Do no obstruct or restrict the vents in the room
where the appliance is installed. Adequate venti-
lation is essential for correct combustion.
Do not expose the boiler to the elements. It is not
designed for outdoor use.
Do not switch the boiler off if outdoor temperature
drops below ZERO (risk of freezing).
Do not leave flammable substances in the room
where the boiler is installed, even inside proper
containers.
Do not dispose of packaging material into the
environment, or leave it within the reach of
children, since it can become a potential hazard.
Dispose of packaging material in compliance
with applicable legislation.
The operation of any appliance that uses electrical power demands that a number of fundamental safety precautions
be respected. In particular:
GENERAL SAFETY INFORMATION
PRECAUTIONS

6
GENERAL
Le caldaie in acciaio r TAU steel boilers are triple flue
pass, condensing boilers for installation in a boiler room.
While they are designed primarily for central heating
purposes, in conjunction with a suitable storage cylinder
they can also be used to produce domestic hot water.
All parts that come into contact with the combustion
gases are made from titanium stabilised stainless steel
to ensure maximum resistance to the corrosive action of
acid condensation.
The boiler has been designed with the combustion cham-
ber at the top and the smooth pipe tube bundle at the
bottom to optimise heat exchange and energy efficiency
and to maximise the condensing effect.
The boiler has a high total water content which is diffe-
rentially distributed between its top and bottom sections.
This allows outgoing water to reach the set temperature
quickly while maintaining the condensing effect and the
water heating time around the tube bundle for as long as
possible.
TAU boilers feature lightly pressurised combustion cham-
bers for a smoother burner action, and high tempera-
ture resistant, stainless steel turbulators inside the tube
bundle for maximum burner efficiency.
The boiler body is thoroughly insulated with a layer of
high density glass wool.
The paint finished external panelling is also internally
insulated with a layer of high density glass wool.
The boiler’s front door and the flue gas chamber can be
opened completely to facilitate the inspection, mainte-
nance and cleaning of internal parts and to speed up
servicing in general.
The front door can open in either direction and can be
opened without removing the burner. The door is factory
fitted with hinges on the left, but these can be reversed if
necessary to suit individual installations.
1
17
19
18
2
3
45 6 7 8 (*)(*)
9
10
11
12
14
15
16
13
1 - Burner
2 - Flame inspection window with
pressure measurement point
3 - Door
4 - Panelling
5 - Outlet
6 - Safety device fitting
7 - Heating return (high temperature)
8 - Heating return (low temperature)
9 - Blind plug
10 - Instrument bulb/probe socket
11 - Combustion chamber
12 - Flue connection
13 - Flue gas box
14 - Inspection door
15 - Condensate drain
16 - Boiler drain
17 - Turbulators
18 - Flue pipes
19 - Second flue pass
PRODUCT DESCRIPTION
(*) On the TAU 1450 N-NC, the low temperature heating return (8) is located at the rear of the boiler, and
the safety fitting (6) is flanged.

7
GENERAL
The rcontrol panels that can be used with rTAU steel boilers are listed below. These control panels cater for
all the needs of the heating system and of all the devices installed in it.
CONTROL PANELS
TECH CLIMA TOP for central
heating (1 direct zone and 2
mixed zones) and domestic hot
water production with a single
stage, two stage, or modulating
burner. Also for controlling solar
heating system and cascaded
boiler systems.
TECH CLIMA COMFORT for
central heating (1 direct zone
and 1 mixed zone) and dome-
stic hot water production with a
single stage burner. Also for con-
trolling solar heating system and
cascaded boiler systems.
TECH CLIMA MIX for controlling
1 additional mixed zone.

8
GENERAL
RECOMMENDED BURNERS AND TECHNICAL SPECIFICATIONS
TAU N NB with power <400 kW
Burners recommended
MODEL CODE 115 NB
3M
150 NB
3M
210 NB
25M
270 NB
25M
350 NB
35M
210 NB
25E
270 NB
25E
350 NB
35E
350 NB
45E
GAS
BS 3/M 3762350 • •
RS 25/M BLU TC FS1 3910510 •
RS 25/M BLU TC FS1 3910510 •
RS 35/M BLU TC FS1 3910610 •
RS 25/E BLU TC FS1 3910710 •
RS 25/E BLU TC FS1 3910710 •
RS 35/E BLU TC FS1 3910810 •
RS 45/E BLU TC FS1 3897332 •
NOTE: Burners must be fitted with a gas ramp device.
See the instruction manual provided with the burner:
- burner installation
- electrical connections
- burner adjustments

9
GENERAL
Technical specications
DESCRIPTION
BOILER TAU NB M/E
115 NB
3M-E
150 NB
3M-E
210 NB
25M-E
270 NB
25M-E
350 NB
25M-E
Device type Condensing boiler for central heating
B23
Fuel All gas fuels
Device category See Burner
Rated heat input (Qmax) HCV (LCV) 127,6 (115) 166,5 (150) 233,1 (210) 299,7 (270) 388,5 (350) kW
Rated heat input (Qmin) HCV (LCV) 88,8 (80) 123,2 (111) 167,6 (151) 234,2 (211) 300,8 (271) kW
Useful (rated) heat output 112 146 205 265 344
Rated maximum useful heat output (80/60°C)
P4 112,1 146,3 205,2 265,1 344,1 kW
Rated min. useful heat output (80/60°C) (Pn
min) 78 108,2 147,5 207,3 266,5 kW
30% heat output with return at 30°C (P1) 33,6 43,9 61,6 79,5 103,2 kW
Seasonal energy efficiency ηs 92 92 93 93 93 %
Efficiency at rated heat input in high tempe-
rature mode η4 (80-60°C) HCV 87,8 (97,5) 87,8 (97,5) 88,0 (97,7) 88,5 (98,2) 88,6 (98,3) %
Useful efficiency at Pn min (80/60°C) HCV 88,3 (98) 87,8 (97,5) 88,0 (97,7) 88,5 (98,2) 88,6 (98,3) %
Efficiency at 30% rated heat input in low tem-
perature mode η1 with return at 30°C (HCV) 97,3 (108,0) 97,8 (108,5) 98,5 (109,3) 98,4 (109,2) 97,8 (108,5) %
Losses from stack for sensible heat (Qmax) 1,7 1,7 1,7 1,5 1,5 %
Losses from casing with burner on 0,3 0,3 0,3 0,5 1,0 %
Constant pressure drop 300 300 420 540 700 W
Flue gas temperature (∆T) < 45÷75 (*) °C
Emissions at max. heat input Nox (0% O2)< 80 mg/kWh
Flue gas mass flow rate (Qmax) (**) 0,05 0,07 0,09 0,12 0,15 kg/sec
Furnace pressure 2,4 2,0 2,7 3,2 4,6 mbar
Furnace volume 172 172 172 241 279 dm³
Total volume of flue gas side 246 272 292 413 482 dm³
Heat exchanger surface area 7,0 8,2 10,4 13,0 16,3 m²
Volumetric heat load (Qmax) 669 872 1.221 1.120 1.254 kW/m³
Specific heat load 16,2 18 19,9 20,4 20,9 kW/m²
Maximum condensate production 11,0 18,4 27,4 31,9 40,9 l/h
Maximum working pressure 6 bar
Maximum admissible temperature 110 °C
Maximum working temperature 95 °C
Pressure drop ∆T 10°C 50 43,2 36,0 54,0 46,4 mbar
Pressure drop ∆T 20°C 12,5 11,3 10,2 16,3 13,4 mbar
Water capacity 375 323 360 495 555 l
Consumption at full load (Elmax) 440 650 650 800 800 W
Consumption at part load (Elmin) 120 195 195 240 240 W
Electrical consumption in standby mode
(PSB) 20 20 20 20 20 W
(*) Depends on return temperature (30-60°C)
(**) At Pn max and Tm = 80°C, Tr = 60°C e CO2= 10,3%
The stack must guarantee the minimum draught specified by applicable technical standards, assuming zero pres-
sure at the connection to the flue.

10
GENERAL
TAU N PREMIX with power <400 kW
Burners recommended
BURNER TAU N PREMIX
ACCESSORIES
KIT
MODEL CODE 115 150 210 270 270 GPL 350 BURNER PLATE
RX 150 P/SV 20037457 •
GAS
PREMIX
RX 180 S/PV 3790330 • 4031894
RX 250 S/PV 3790320 • 4031894
RX 360 S/PV 20067700 • 20029111
RX 360 S/PV GPL 20104208 • 20029111
RX 500 S/PV 20077444 • 20029111
NOTE: Burners must be fitted with a gas ramp device.
See the instruction manual provided with the burner:
- burner installation
- electrical connections
- burner adjustments

11
GENERAL
Technical specications
DESCRIPTION
BOILER TAU N PREMIX
115 150 210 270 350
Device type Condensing boiler for central heating
B23- B23P(*)
Fuel All gas fuels
Device category See Burner
Rated heat input (Qmax) HCV (LCV) 127,6 (115) 166,5 (150) 233,1 (210) 299,7 (270) 388,5 (350) kW
Rated heat input (Qmin) HCV (LCV) 88,8 (80) 123,2 (111) 167,6 (151) 234,2 (211) 300,8 (271) kW
Useful (rated) heat output 112 146 205 265 344
Rated maximum useful heat output (80/60°C)
P4 112,1 146,3 205,2 265,1 344,1 kW
Rated min. useful heat output (80/60°C) (Pn
min) 78 108,2 147,5 207,3 266,5 kW
30% heat output with return at 30°C (P1) 33,6 43,9 61,6 79,5 103,2 kW
Seasonal energy efficiency ηs 92 92 93 93 93 %
Efficiency at rated heat input in high tempe-
rature mode η4 (80-60°C) HCV 87,8 (97,5) 87,8 (97,5) 88,0 (97,7) 88,5 (98,2) 88,6 (98,3) %
Useful efficiency at Pn min (80/60°C) HCV 88,3 (98) 87,8 (97,5) 88,0 (97,7) 88,5 (98,2) 88,6 (98,3) %
Efficiency at 30% rated heat input in low tem-
perature mode η1 with return at 30°C (HCV) 97,3 (108,0) 97,8 (108,5) 98,5 (109,3) 98,4 (109,2) 97,8 (108,5) %
Losses from stack for sensible heat (Qmax) 1,7 1,7 1,7 1,5 1,5 %
Losses from casing with burner on 0,3 0,3 0,3 0,5 1,0 %
Constant pressure drop 300 300 420 540 700 W
Flue gas temperature (∆T) < 45÷75 (**) °C
Emissions at max. heat input Nox (0% O2) 68 60 60 59 48 mg/kWh
Emissions at max. heat input CO 0 0 0 0 0 mg/kWh
Flue gas mass flow rate (Qmax) (***) 0,05 0,07 0,09 0,12 0,15 kg/sec
Furnace pressure 1,9 2,0 2,7 3,2 4,6 mbar
Furnace volume 172 172 172 241 279 dm³
Total volume of flue gas side 246 272 292 413 482 dm³
Heat exchanger surface area 7,0 8,2 10,4 13,0 16,3 m²
Volumetric heat load (Qmax) 669 872 1.221 1.120 1.254 kW/m³
Specific heat load 16,2 18 19,9 20,4 20,9 kW/m²
Maximum condensate production 11,0 18,4 27,4 31,9 40,9 l/h
Maximum working pressure 6 bar
Maximum admissible temperature 110 °C
Maximum working temperature 95 °C
Pressure drop ∆T 10°C 50 43,2 36,0 54,0 46,4 mbar
Pressure drop ∆T 20°C 12,5 11,3 10,2 16,3 13,4 mbar
Water capacity 375 323 360 495 555 l
Consumption at full load (Elmax) 440 400 430 450 1050 W
Consumption at part load (Elmin) 130 140 160 180 250 W
Electrical consumption in standby mode
(PSB) 20 20 20 20 20 W
(*) The B23P configuration may only be adopted with premix gas burners.
(**) Depends on return temperature (30-60°C)
(***) At Pn max and Tm = 80°C, Tr = 60°C e CO2= 10,3%
The stack must guarantee the minimum draught specified by applicable technical standards, assuming zero pres-
sure at the connection to the flue.

12
GENERAL
TAU N with power >400 kW
Burners recommended
BURNER TAU N ACCESSORIES KIT
MODEL CODE 450 600 800 1000 1250 1450 BURNER
PLATE LONG HEAD
GAS
TWO STAGE
RS 50 TC 3784702 •
RS 70 TC 3785102 •
RS 100 TC 3785302 • •
RS 130 TC 3785500 •
RS 190 TC 3785813 •
MODULATING
RS 55/M BLU TC FS1 20038484 • 4031188
RS 68/M BLU T.C. 3897406 • • 4031196
RS 120/M BLU T.C.D 3897606 • 4031196
RS 120/M BLU T.C.D 3897606 • 4031196
RS 160/M BLU TC FS1 3788006 • 20047680
RS 160/M BLU TC FS1 3788006 • 4031187
RS 55/E BLU TC FS1 20038491 • 4031188
RS 68/E BLU TC FS1 3897432 • • 4031196
RS 120/E BLU TC FS1 3897632 • 4031196
RS 120/E BLU TC FS1 3897632 • 4031196
RS 160/E BLU TC FS1 3788032 • 20047680
RS 160/E BLU TC FS1 3788032 • 4031187
RS 50/M MZ TC 3781622 •
RS 70/M TC 3789610 •
RS 100/M TC 3789710 • •
RS 130/M TC 3789810 •
RS 190/M TC 3787623 •
PREMIX
RX 500 S/PV 20077444 • 20067543
RX 850 S/PV 20074219 • 20092252
RX 1000 S/PV 20050087 • 20092252
RX 1000 S/PV 20050087 • 20092252
NOTE: Burners must be fitted with a gas ramp device.
See the instruction manual provided with the burner:
- burner installation
- electrical connections
- burner adjustments

13
GENERAL
Technical specications
DESCRIPTION
BOILER TAU N
450 600 800 1000 1250 1450
Device type Condensing boiler for central heating
B23- B23P(*)
Fuel All gas fuels
Device category See Burner
Rated heat input (Qmax) HCV (LCV) 499,4 (450) 665,5 (600) 887,9 (800) 1110 (1000) 1387 (1250) 1609 (1450) kW
Rated heat input (Qmin) HCV (LCV) 389,6 (351) 500,6 (451) 667 (601) 889 (801) 1111 (1001) 1388 (1251) kW
Useful (rated) heat output 442 590 786 983 1229 1425
Rated maximum useful heat output
(80/60°C) P4 442,4 589,8 786,4 983 1229 1425 kW
Rated min. useful heat output
(80/60°C) (Pn min) 345,2 443,5 591,0 788,0 984,0 1.230 kW
30% heat output with return at 30°C
(P1) 132,7 176,9 236 295 369 428 kW
Seasonal energy efficiency ηs %
Efficiency at rated heat input in high
tempe- rature mode η4 (80-60°C)
HCV
88,6 (98,3) 88,6 (98,3) 88,6 (98,3) 88,6 (98,3) 88,6 (98,3) 88,6 (98,3) %
Useful efficiency at Pn min (80/60°C)
HCV 88,6 (98,3) 88,6 (98,3) 88,6 (98,3) 88,6 (98,3) 88,6 (98,3) 88,6 (98,3) %
Efficiency at 30% rated heat input in
low temperature mode η1 with return
at 30°C (HCV)
97,8 (108,5) 97,8 (108,5) 97,8 (108,5) 97,8 (108,5) 97,8 (108,5) 97,8 (108,5) %
Losses from stack for sensible heat
(Qmax) 1,9 1,9 1,9 1,9 1,9 1,9 %
Losses from casing with burner on 0,6 0,6 0,6 0,6 0,6 0,6 %
Constant pressure drop <0,2 %
Flue gas temperature (∆T) < 45÷75 (**) °C
Emissions at max. heat input Nox
(0% O2)< 80 mg/kWh
Flue gas mass flow rate (Qmax) (***) 0,20 0,26 0,33 0,43 0,54 0,63 kg/sec
Furnace pressure 5,0 5,5 5,7 6,3 6,8 7,4 mbar
Furnace volume 442,0 496,0 753,0 845,0 1.037,0 1.249,0 dm³
Total volume of flue gas side 737,0 860,0 1.290,0 1.454,0 1.763,0 2.097,0 dm³
Heat exchanger surface area 21,8 28,8 39,6 46,5 56,2 62,3 m²
Volumetric heat load (Qmax) 1.018 1.210 1062 1.183 1.205 1.161 kW/m³
Specific heat load 20,1 20,3 18,5 21,0 21,7 22,6 kW/m²
Maximum condensate production 52,2 73,8 88,0 111,4 132,7 159,5 l/h
Maximum working pressure 6 bar
Maximum admissible temperature 110 °C
Maximum working temperature 95 °C
Pressure drop ∆T 10°C 33,8 30,2 128,7 121,5 100,4 150,1 mbar
Pressure drop ∆T 20°C 9,0 8,5 28,7 30,6 28,4 36,3 mbar
Water capacity 743 770 1320 1395 1825 1900 l
(*) The B23P configuration may only be adopted with premix gas burners.
(**) Depends on return temperature (30-60°C)
(***) At Pn max and Tm = 80°C, Tr = 60°C e CO2= 10,3%
The stack must guarantee the minimum draught specified by applicable technical standards, assuming zero pres-
sure at the connection to the flue.

14
GENERAL
Do not re-use old burners if their nozzle lengths are below those specified in the table.
If you are installing a new boiler but re-using an old bur-
ner, always perform the following checks.
- Make sure that the performance of the old burner is
adequate for the requirements of the boiler.
- Make sure that the length and diameter of the burner
nozzle are as specified in the following table.
When you finish installing the burner in the boiler, fill
the gap between the burner nozzle and the refrac-
tory material in the door with the ceramic insulation
(A) supplied with the boiler.
MODEL 115 N 150
N-NC
210
N-NC
270
N-NC
350
N-NC
450
N-NC
600
N-NC 800 N 1000 N 1250 N 1450 N-NC
Burner head L min (mm) 110 110 170 180 180 195 200 200 200 200 205
ø hole in door (mm) 162 162 162 180 180 210 210 235 235 230 265
A
Ø
L
L < S
S
L
IMPORTANT NOTES FOR BURNER
INSTALLATION
Before fixing the burner to the boiler, make sure that:
- The door opens the right way (see the relevant sections
for details on how to reverse the door).
- The length (L) of the burner fixing bolts is less than
(S), i.e. the total depth of the seal, plates and washer.
Longer bolts can cause the door to warp, compro-
mising its ability to seal the boiler hermetically and
permitting the release of combustion fumes.
To ensure correct burner installation, also refer to the
burner’s own manual.

15
GENERAL
- Serial number plate
This is located on the boiler body and specifies the
serial number, model, and furnace power.
- Data plate
This lists the appliance’s technical specifications
and performance.
It comes inside the documentation envelope. On
completion of the installation you MUST APPLY IT in
a clearly visible position at the top of one of the side
panels.
If you damage or lose this label, order a replace-
ment immediately from r’s Technical Assistance
Service.
If these plates or any other means of clearly identifying the product are defaced, removed or lost, proper installa-
tion and servicing may be rendered difficult.
TAU boilers are identified by two plates:
PRODUCT IDENTIFICATION
The following accessories are available, to be ordered separately:
ACCESSORIES
ACCESSORY CODE
N2 neutralisation kit (TAU 115-350) 4031810
HN2 neutralisation kit (TAU 115-350) 4031811
N3 neutralisation kit (TAU 450-1250) 4031812
HN3 neutralisation kit (TAU 450-1250) 4031813
Codice PIN
Portata Termica
Pressione massima
COLLEGAMENTO DI TERRA OBBLIGATORIO
Combustibile Utilizzato
Matricola
Codice
kW
mbar
bar
CALDAIA A CONDENSAZIONE
°C
kW
Contenuto acqua
Categoria dell' Apparecchio
Pressione focolare
Tipo di Apparecchio
Anno
Paese di destinazione
Modello
PMS
Qmax(Hi)
di esercizio
Tipo
Potenza Utile
Pn max 40/30°
Tmax
Temp. massima
ammessa
I
Portata Termica
kW
Qmin(Hi)
Potenza utile
kW
Pn max(Hi) Potenza utile
kW
Pn min(Hi)
067654IT
Matricola
Modello
bar
067654IT
kW
Pressione massima
di esercizio PMS
Portata Termica
nominale Qn (Hi)
Combustibile Utilizzato
RIELLO S.p.A.
Via Ing.Pilade Riello 7
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
37045 Legnago (VR) - ITALY
Codice PIN
Portata Termica
Pressione massima
COLLEGAMENTO DI TERRA OBBLIGATORIO
Combustibile Utilizzato
Matricola
Codice
kW
mbar
bar
CALDAIA A CONDENSAZIONE
°C
kW
Contenuto acqua
Categoria dell' Apparecchio
Pressione focolare
Tipo di Apparecchio
Anno
Paese di destinazione
Modello
PMS
Qmax(Hi)
di esercizio
Tipo
Potenza Utile
Pn max 40/30°
Tmax
Temp. massima
ammessa
I
Portata Termica
kW
Qmin(Hi)
Potenza utile
kW
Pn max(Hi) Potenza utile
kW
Pn min(Hi)
067654IT
Matricola
Modello
bar
067654IT
kW
Pressione massima
di esercizio PMS
Portata Termica
nominale Qn (Hi)
Combustibile Utilizzato
RIELLO S.p.A.
Via Ing.Pilade Riello 7
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
37045 Legnago (VR) - ITALY

16 SYSTEM MANAGER
Have r’s Technical Assistance Service start-up your
rTAU boiler for the first time. Once this has been
done, the boiler can be left to function automatically.
Under certain circumstances, such as after long periods
of disuse, the service engineer responsible for the boiler
may need to re-start it without involving the Technical
Assistance Service.
To do so, perform the following checks and operations:
- Check that the gas cock and heating water cock are
shut.
- While the system is still cold, check that working pres-
sure in the heating circuit is over 1 bar but below the
maximum limit specified for the appliance.
-
Since the control panel incorporates a temperature control
function, make sure that the control panel is switched on.
- Adjust the timer thermostat (if installed) or the temperatu-
re control to the desired temperature (~20° C).
- Turn the system’s main power switch ON.
- Turn the control panel power switch ON and make sure
that the green power indicator lights.
- Make the settings as instructed in the instruction
manual for your control panel.
INITIAL START-UP
ON
OFF

17
SYSTEM MANAGER
The burner should now ignite and remain in operation
until the set temperature is reached.
The burner will then switch off and on automatically to
maintain the set temperature without further operator
action.
If any ignition faults or malfunctions occur, the burner
performs a “LOCKOUT SHUTDOWN”. This is shown by
the red button light on the burner and by the warning
light on the control panel.
If a “LOCKOUT SHUTDOWN” occurs, wait about 30
seconds before resetting the burner.
To reset the burner, press the red button light on the
burner and wait until the flame ignites.
Repeat this operation 2 -3 times at the most. If the pro-
blem persists after that, call r’s Technical Assistance
Service.
If the boiler is not going to be used for an extended
period of time, perform the following operations:
- Turn the control panel power switch OFF and make
sure that the green power indicator goes out.
- Turn the system’s main power switch OFF.
- Close the fuel cock and heating water cock.
- Drain the central heating circuit if there is any risk of
freezing.
Contact r’s Technical Assistance Service if you
encounter any problems in completing the above
procedure.
PREPARING FOR EXTENDED PERIODS OF DISUSE
ON
OFF

18
SYSTEM MANAGER
Use a cloth damped in soapy water to clean the boiler’s
external panelling.
To remove stubborn marks, use a cloth damped in a 50%
mix of water and denatured alcohol or a suitable cleaning
product.
Carefully dry the boiler after cleaning.
Do not use abrasive cleaning pads or powder deter-
gents.
Never clean the boiler without first disconnecting it
from the mains electricity supply by turning the main
power switch and the control panel switch OFF.
The combustion chamber and flues must be cle-
aned periodically by r’s Technical Assistance
Service or by a qualified technician (see page
40).
Please remember that THE PERSON RESPONSIBLE
FOR SYSTEM MANAGEMENT MUST ENSURE THAT
PROFESSIONALLY QUALIFIED HEATING ENGINEERS
UNDERTAKE PERIODIC MAINTENANCE AND
COMBUSTION EFFICIENCY MEASUREMENTS.
r’s Technical Assistance Service is qualified to satisfy
these legal requirements and can also provide useful
information on MAINTENANCE PROGRAMMES desig-
ned to guarantee:
- greater safety;
- compliance with applicable legislation;
- freedom from the risk of fines in the event of spot
checks.
CLEANING
MAINTENANCE

19
SYSTEM MANAGER
Seller: .............................................................................................................................................
Mr. .......................................................................................................................................................
Address .......................................................................................................................................
Tel. ......................................................................................................................................................
Technical Assistance Service: ....................................................................
Mr. .......................................................................................................................................................
Address .......................................................................................................................................
Tel. ......................................................................................................................................................
Installer:........................................................................................................................................
Mr. .......................................................................................................................................................
Address ......................................................................................................................................
Tel. .....................................................................................................................................................
Date Work done
USEFUL INFORMATION

20
INSTALLER
rTAU steel boilers come in 2 separate crates:
1) BOILER BODY CRATE, bearing the documentation
envelope (A) and containing:
- Instruction manual;
- Data label (to be applied to the panelling on com-
pletion of the installation);
- Water test certificate;
- Bar code labels.
- Spare parts catalogue
- Ceramic insulation (B)
- Cleaning brush (C).
The instruction manual is an integral part of the
boiler. Once located, read it thoroughly and keep
it safe.
2) PANELLING CRATE, complete with assembly
accessories, protected by cardboard packaging and
a wooden crate.
IMPORTANT!
For the boiler to function correctly, it must be connected
to a rcontrol panel and dedicated control accesso-
ries.
UNPACKING THE PRODUCT
A
C
B