Riello TAU 150 N Guida

INSTALLATION, OPERATION, MAINTENANCE

AND SYSTEM MANAGEMENT MANUAL

STAINLESS STEEL

CONDENSING

BOILER

150 N ÷ 1450 N

150 NC ÷ 600 NC

TAU

TAU boilers conform to the Efficiency Directive 92/42/EEC ( ),

to Gas Directive 90/396/EEC and applicable sections of the Electromagnetic

Compatibility Directive 89/336/EEC and Low Voltage Directive 73/23/EEC.

0694

MODEL CODE

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

MODEL CODE

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

CONFORMITY

RANGE

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.

On request, your Technical Assistance Centre will also provide you with a system service book. In Italy this is required

by Presidential Decree n° 412 of the 26th August 1993. Your Technical Assistance Centre will also be pleased to instruct

you how to get the best from your new boiler.

This manual, Code 20014315 - Rev. 11 (02/10) is made

up of 44 pages

CONTENTS

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 7

Product identification 8

Accessories 9

Technical specifications 9

SYSTEM MANAGER

Initial start-up 10

Preparing for extended periods of disuse 11

Cleaning 12

Maintenance 12

Useful information 13

INSTALLER

Unpacking the product 14

Overall dimensions and weights 15

Handling 15

Place of installation 16

Water in the central heating circuit 17

Water connections 21

Condensate drain 25

Condensate neutralisation 25

Combustion gas exhaust 27

Door hinges 27

Changing the direction of door opening 28

Removing the hinge assembly “B” 29

Fitting the panelling 30

TECHNICAL ASSISTANCE SERVICE

Preparing for initial start-up 31

Initial start-up 32

Checks during and after initial start-up 33

Maintenance 34

- Opening the door 34

- Adjusting the door 34

Cleaning the boiler 35

Troubleshooting 36

APPENDIX

Water treatment in domestic heating systems

(extract from Italian standard UNI 8065) 37

CONTENTS

GENERAL 5

TAU boilers are delivered in separate crates. Check

that the appliance is complete and undamaged 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. (In Italy, the law regulating profes-

sional installers is Law 46 of the 5th March 1990.)

On completion of the installation, the installer must

issue the owner with a declaration of conformity

confirming that the installation has been completed

to the highest standards in compliance with the

instructions provided by rin 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 replace-

ment 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 equip-

ment, 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 chil-

dren, 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

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 temperature

resistant, stainless steel turbulators inside the tube bun-

dle 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.

45 678(*)(*)

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, the low temperature heating return (8) is located at the rear of the boiler, and

the safety fitting (6) is flanged.

b When a TECH CLIMA TOP or CLIMA COMFORT control panel is installed, the boiler return (cold) line must be

equipped with a temperature sensor socket.

GENERAL 7

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.

The burners recommended to obtain the best possible performance from rTAU boilers are:

(

)

Low Nox: low nitrogen oxide emissions.

NOTE:

Burners must be fitted with a gas ramp device.

See the instruction manual provided with the burner

for further information on:

- burner installation

- electrical connections

- eurner adjustments.

CONTROL PANELS

RECOMMENDED BURNERS

BURNER TAU N-NC TAU N ACCESSORIES KIT

MODEL CODE 150 210 270 350 450 600 800 1000 1250 1450 BURNER PLATE LONG

HEAD

GAS

TWO STAGE

Gulliver BS 3D 3761716 (*)

•

3001009

RS 34 t.c. 3789000

••

RS 44 t.c. 3789100

•

RS 50 t.c. 3784700

•

RS 70 t.c. 3785100

•

RS 100 t.c. 3785300

••

RS 130 t.c. 3785500

•

RS 190 3785812

•

MODULATING

RS 34/M MZ t.c. 3788700

••

RS 44/M MZ t.c. 3788800

•

RS 50/M t.c. 3781620

•

RS 70/M t.c. 3789600

•

RS 100/M t.c. 3789700

••

RS 130/M t.c. 3789800

•

RS 190/M t.c. 3787620

•

Gulliver BS 3/M 3762300 (*)

•

3002724

RS 25/M BLU 3910500 (*)

••

RS 35/M BLU 3910600 (*)

•

RS 45/M BLU 3897304 (*)

•

RS 68/M BLU 3897404 (*)

••

4031196

RS 120/M BLU 3897604 (*)

••

RS 160/M BLU 3788008 (*)

••

RS 25/E BLU 3910700 (*)

••

RS 35/E BLU 3910800 (*)

•

RS 45/E BLU 3897330 (*)

•

RS 68/E BLU 3897430 (*)

••

RS 120/E BLU 3897630 (*)

••

4031187

RS 160/E BLU 3788030 (*)

••

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.

GENERAL

Do not re-use old burners if their nozzle lengths are below those specified in the table.

- 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:

IMPORTANT!

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.

PRODUCT IDENTIFICATION

MODEL 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

Min. L (mm) 160 216 216 216 216 250 250 250 280 350

Ø (mm) 130 140 140 140 152 179 179 179 189 222

GENERAL 9

The stack must guarantee the minimum draught specified by applicable technical standards, assuming zero pres-

sure at the connection to the flue.

Values obtained with rburners: BS - RS - RS.../M - RS.../M BLU.

The following accessories are available, to be ordered separately:

ACCESSORIES

TECHNICAL SPECIFICATIONS

(*) Depends on return temperature (30-60°C)

(**) At Pn max and output T = 80°C, return T = 60°C and CO2= 9.7%

ACCESSORY CODE

Burner plate for steel boilers 4031187

Burner plate 4031196

N2 neutralisation kit (TAU 150-350) 4031810

HN2 neutralisation kit (TAU 150-350) 4031811

N3 neutralisation kit (TAU 450-1250) 4031812

HN3 neutralisation kit (TAU 450-1250) 4031813

Description BOILER model

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

Fuel GAS

Rated heat input (Q max) 150,0 210,0 270,0 349,0 450,0 600,0 800,0 1000,0 1250,0 1450,0 kW

Rated heat input (Q min) 111,0 151,0 211,0 271,0 350,0 451,0 601,0 801,0 1001,0 1251 kW

Rated maximum useful heat output

(80/60°C) (Pn max) 147,8 207,3 269,9 346,7 445,2 593,6 791,2 989,4 1236,7 1434,6 kW

Rated minimum useful heat output

(80/60°C) (Pn min) 108,2 147,2 205,7 265,6 339,5 437,5 583,0 777,0 971,0 1213,5 kW

Rated maximum useful heat output

(40/30°C) (Pn max) 159,7 223,6 290,2 375,2 481,5 642,0 802,5 1070,0 1337,5 1551,5 kW

Useful efficiency at Pn max (80/60°C) 98,5 98,7 99,9 99,3 98,9 98,9 98,9 98,9 98,9 98,9 %

Useful efficiency at Pn min (80/60°C) 97,5 97,5 97,5 98,0 97,0 97,0 97,0 97,0 97,0 97,0 %

Useful efficiency at Pn max (50/30°C) 106,5 106,5 106,5 106,5 106,5 106,5 106,5 106,5 106,5 106,5 %

Useful efficiency at Pn max (40/30°C) 106,5 106,5 107,5 107,5 107,0 107,0 107,0 107,0 107,0 107,0 %

Useful efficiency at 30% of Pn (30°C) 106,6 106,8 109,0 107,3 107,0 107,0 107,0 107,0 107,0 107,0 %

Losses from stack for sensible heat

(Qmax) 1,7 1,7 1,5 1,5 1,9 1,9 1,9 1,9 1,9 1,9 %

Losses from casing with burner on 0,3 0,3 0,5 1,0 0,6 0,6 0,6 0,6 0,6 0,6 %

Constant pressure drop <1 %

Flue gas temperature (ΔT) < 45÷75 (*) °C

Flue gas mass flow rate (Q max) (**) 0,07 0,09 0,12 0,15 0,20 0,26 0,33 0,43 0,54 0,63 kg/sec

Furnace pressure 2,0 2,7 3,2 4,6 5,0 5,5 5,7 6,3 6,8 7,4 mbar

Furnace volume 172,0 172,0 241,0 279,0 442,0 496,0 753,0 845,0 1037,0 1249,0 dm3

Total volume of flue gas side 253,0 277,0 413,0 482,0 737,0 860,0 1290,0 1454,0 1763,0 2097,0 dm3

Heat exchanger surface area 6,1 8,8 13,0 16,3 21,8 28,8 39,6 46,5 56,2 62,28 m2

Volumetric heat load (Q max) 872,1 1220,9 1120,3 1250,9 1018,1 1209,7 996,0 1183,4 1205,4 1160,9 kW/m3

Specific heat load 23,75 23,10 20,4 20,9 20,1 20,3 18,5 21,0 21,7 22,6 kW/m2

Maximum condensate production 18,4 27,4 31,9 40,9 52,2 73,8 88,0 111,4 132,7 159,5 l/h

Maximum working pressure 6 bar

Maximum admissible temperature 100,0 °C

Maximum working temperature 80,0 °C

Pressure drop ΔT 10°C 150,1 100,4 121,5 128,7 30,2 33,8 46,4 54,0 36,0 43,2 mbar

Pressure drop ΔT 20°C 36,3 28,4 30,6 28,7 8,5 9,0 13,4 16,3 10,2 11,3 mbar

Water capacity 323 360 495 555 743 770 1320 1395 1825 1900 l

Turbulators 22 39 52 59 72 90 106 114 130 145 n°

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.

SYSTEM MANAGER

INITIAL START-UP

OFF

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