RIELLO TAU 115 N OIL PRO Stainless Steel Boilers and Burners Instruction Manual

RIELLO TAU 115 N OIL PRO Stainless Steel Boilers and Burners

Specifications

• Model: TAU 115 N OIL PRO
• Model: TAU 150 N OIL PRO
• Model: TAU 210 N OIL PRO
• Model: TAU 270 N OIL PRO
• Model: TAU 350 N OIL PRO
• Model: TAU 450 N OIL PRO
• Model: TAU 600 N OIL PRO
• Model: TAU 800 N OIL PRO
• Model: TAU 1000 N OIL PRO
• Model: TAU 115 NC OIL PRO
• Model: TAU 150 NC OIL PRO
• Model: TAU 210 NC OIL PRO
• Model: TAU 270 NC OIL PRO
• Model: TAU 350 NC OIL PRO

Product Usage Instructions

Precautions

Before using the boiler, please take note of the following precautions:

• The boiler should be checked upon delivery to ensure that it is complete, undamaged, and as ordered. Any discrepancies or damage should be reported to the dealer immediately.
• The installation of this product must be done by a legally qualified heating engineer. After installation, the installer must provide the owner with a declaration of conformity, confirming that the installation has been completed according to the instructions provided in the manual and in compliance with applicable laws and\ standards.
• The product should only be used for its intended purpose as specified by the manufacturer. Any damage to property or injury caused by improper installation, adjustment, maintenance, or use will not be the responsibility of the manufacturer.
• If any water leakage is noticed from the boiler, it should be immediately disconnected from the mains electricity supply, the water supply should be shut off, and the local technical assistance service or a qualified heating engineer should be notified.
• The operating pressure in the water circuit should be periodically checked to ensure it is over 1 bar but below theV maximum limit specified for the boiler. If the pressure is not within the specified range, contact the technical assistance service or a qualified heating engineer.
• If the boiler is not going to be used for an extended period of time, it should be prepared for shutdown. This includes switching the boiler off at the control panel, turning off the main system switch, closing the fuel cock and heating circuit water cock, and draining the central heating circuit if necessary.

FAQ

• Q: What should I do if I notice water leaking from the boiler?
  A: If you notice any water leaking from the boiler, immediately disconnect it from the mains electricity supply, shut off the watersupply, and notify your local Riello’s Technical Assistance Service or a qualified heating engineer.

• Q: How often should I check the operating pressure in the water circuit?
  A: The operating pressure in the water circuit should be checked periodically to ensure it is over 1 bar but below the maximum limit specified for the boiler. If it is not within the specified range, contact Riello’s Technical Assistance Service or a professionally qualified heating engineer.

• Q: What should I do if the boiler is not going to be used for an extended period of time?
  A: If the boiler is not going to be used for an extended period of time, contact Riello’s Technical Assistance Service or a qualified heating engineer to have it prepared for shutdown. This includes switching the boiler off at the control panel, turning off  the main system switch, closing the fuel cock and heating circuitwater cock, and draining the central heating circuit if there is any risk of freezing.

RANGE

ACCESSORIES
For a complete list of accessories and details of their compatibility, refer to the Catalogue

Dear Customer,
Thank you for choosing a R boiler. You have purchased a modern, high efficiency, quality product that is designed to give dependable and safe service and to provide comfort in the home for many years to come. Arrange for your boiler to be serviced regularly by an authorised Technical Assistance Service R. Their personnel are specially trained to keep your boiler efficient and cheap to run. They 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 efficient func-tioning of your TAU N OIL PRO boiler.
Please accept our renewed thanks for your purchase
Riello S.p.A.

CONFORMITY

R TAU N OIL PRO boilers conform to:

• Directive 92/42/EEC on efficiency requirements
• Electromagnetic Compatibility Directive 2014/30/EU
• Low Voltage Directive 2014/35/EU

Models up to 400 kW conform to the Energy-Related Products Directive 2009/125/EC and to the EU Delegated Regulation 813/2013
At the end of its life, the product should be not be disposed of as solid urban waste, but rather it should be handed over to a differentiated waste collection centre.

The following symbols are used in this manual:

• CAUTION! = Identifies actions that require caution and adequate preparation.
• STOP! = Identifies actions that you MUST NOT do.

GENERAL INFORMATION

General Safety Information

• The boiler is delivered in separate crates. Check that it is complete, undamaged and as ordered as soon as you receive it. Report any discrepancies or damage to the dealer who sold it.
• This product must be installed by a legally qualified heating engineer. 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 R in this instruction manual, and that it conforms to all applicable laws and standards.
• This product must only be used for the purpose for which it is designed and made, as specified by R. R declines all responsibility, contractual or other, for damage to property or injury to persons or animals caused by improper installation, adjustment, maintenance or use.
• If you notice any water leaking from the boiler, disconnect it immediately from the mains electricity supply, shut off the water supply, and notify your local R’s Technical Assistance Service or a qualified heating engineer immediately.
• Periodically check that operating pressure in the water circuit is over 1 bar but below the maximum limit specified for the boiler. If this is not the case, contact Technical Assistance Service R or a professionally qualified heating engineer.
• If the boiler is not going to be used for an extended period of time, contact R’s Technical Assistance Service or a qualified heating engineer to have it prepared for shutdown as follows
  • Switch the boiler OFF at the control panel
  • Turn the main system switch “off”
  • Close the fuel cock and heating circuit 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 your local R’s Technical Assistance Service.

Precautions

The operation of any appliance that uses fuel, electrical power and water demands that a number of fundamental safety precautions be respected:

• It is forbidden to use electrical devices or equipment, such as switches, appliances, etc. if there is a smell of gas or unburnt products. If so:

  • Ventilate the room, opening doors and windows
  • Close the fuel shut-off cock
  • Report the fault immediately to the R’s Technical Assistance
    Service or a professionally qualified heating engineer.

• 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 instructions from the manufacturer.

• Do not plug or block the condensate drain outlet.

• Never pull, disconnect, or twist the electrical cables coming from the appliance even if it is disconnected from the mains electricity supply.

• Do not obstruct or restrict the vents in the room where the boiler is installed. Adequate ventilation is essential for correct combustion.

• Do not expose the boiler to the elements. It is designed to work indoors.

• Do not switch the boiler off if outdoor temperature drops below ZERO (risk of freezing).

• Do not store containers of flammable substances in the room where the boiler is installed.

• Do not allow children or persons with reduced physical, sensorial or mental abilities or with insufficient experience and knowledge to operate this system without proper supervision from the person responsible for its safe use.

• 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.

Description of the appliance

• TAU N OIL PRO R 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.
• The parts of the boiler that are in contact with combustion products are made entirely of highly alloyed stainless steel, capable of providing the best possible resistance to corrosion caused by acid condensate.
• The boiler has been designed with the combustion chamber 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 differentially 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 N OIL PRO boilers feature lightly pressurised combustion chambers for a smoother burner action, and high temperature 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, maintenance 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. Burner
2. Flame inspection window with pressure measurement cfitting
3. Door
4. Casing
5. Outlet
6. Safety device fitting
7. Heating return (high temperature)
8. Heating return (low temperature)
9. Instrument bulb/sensor sockets
10. Combustion chamber
11. Flue gas exhaust
12. Flue gas box
13. Inspection window
14. Condensate outlet
15. Boiler drain
16. Turbulators
17. Flue gas pipes
18. Second flue pass

Control panels

• The R control panels that can be used with R TAU N OIL PRO 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.
• RIELLOtech CLIMA COMFORT for central heating (1 direct zone and 1 mixed zone) and domestic hot water production with a singlestage burner. Also for controlling solar heating system and cascaded boiler systems.
• RIELLOtech CLIMA MIX for controlling 1 additional mixed zone.

Recommended burners and technical specifications

TAU N OIL PRO with power < 400 kW
The burners suggested to obtain the best performance of R TAU N OIL PRO <400 kW boilers are:

(R) Reference burner used during performance qualification tests to derive the technical data declared.
See the instruction manual provided with the burner:

• Burner installation
• Electrical connections
• Burner adjustments.

To assemble/disassemble the burners equipped with recirculation tube, it might be necessary to remove the latter before carrying out such operations (strictly comply with the use and maintenance manual of the burner).

Technical specifications

DESCRIPTION| TAU N OIL PRO|
---|---|---
115| 150| 210| 270| 350
Device type| Condensing boiler for central heating|
B23|
Fuel| All oils|
Device category| See Burner|
Rated heat input (Qmax) HCV (LCV)| 122

(115)

| 159

(150)

| 223

(210)

| 286

(270)

| 371

(350)

| kW
Rated heat input (Qmin) HCV (LCV)| 85

(80)

| 118

(111)

| 160

(151)

| 224

(211)

| 287

(271)

| kW
Useful (rated) heat output| 122| 146| 205| 264| 343| kW
Rated maximum useful heat output (80/60°C) P4| 112,2| 146,4| 205,2| 264,3| 343,7| kW
Rated maximum useful heat output (50/30°C)| 119,6| 156,0| 218,2| 280,3| 361,9| kW
30% heat output with return at 30°C (P1)| 33,7| 43,9| 61,6| 79,3| 103,1| kW
Seasonal energy efficiency ηs| 94| 93| 94| 94| 94| %
Efficiency at rated heat input in high temperature mode η4 (80-60°C) HCV (LCV)| 92

(97,6)

| 92

(97,6)

| 92,1

(97,7)

| 92,3

(97,9)

| 92,6

(98,2)

| %
Efficiency at 30% rated heat input in low tempera- ture mode η1 with return at 30°C (HCV)| 98,8

(104,8)

| 98,7

(104,7)

| 98,6

(104,6)

| 98,4

(104,4)

| 98,1

104,1)

| ****

%

Useful efficiency at max Pn (50-30°C)| 104,0| 104,0| 103,9| 103,8| 103,4| %
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 (DT)| < 45÷75 (*)| °C
Emissions at max. heat input Nox (0% O2)| <120 (**)| mg/kWh
Flue gas mass flow rate (Qmax)| 0,05| 0,07| 0,09| 0,12| 0,15| kg/sec
Furnace pressure| 2,2| 2,0| 2,7| 3,2| 4,6| mbar
Furnace volume| 172| 172| 172| 241| 279| dm3
Tot. volume of flue gas side| 246| 272| 292| 413| 482| dm3
Heat exchange surface area| 7,0| 8,2| 10,4| 13,0| 16,3| m2
Volumetric heat load (Qmax)| 669| 872| 1221| 1120| 1254| kW/m3
Specific heat load| 16| 18| 20| 21| 21| kW/m2
Maximum condensate production| 11,0| 18,4| 27,4| 31,9| 40,9| l/h
Maximum working pressure| 6| bar
Maximum permitted temperature| 110| °C
Maximum operating temperature| 95| °C
Pressure drop DT 10°C| 50,0| 43,2| 36,0| 54,0| 46,4| mbar
Pressure drop DT 20°C| 12,5| 11,3| 10,2| 16,3| 13,4| mbar
Water capacity| 375| 360| 323| 495| 555| l
Consumption at full load (Elmax)| 390| 650| 650| 800| 800| W
Consumption at part load (Elmin)| 117| 195| 195| 240| 240| W
Electrical consumption in standby mode (PSB)| 20| 20| 20| 20| 20| W

Depends on return temperature (30-60°C).
Value according to EN267 (nitrogen content in light oil =140mg/kg).
Values obtained with reference burners (R) used for the performance verification tests (see burner pairing table), calibrated with CO2 = 12,5%.
WARNING : If coupled with low NOx emission diesel burners compliant with the 2018 ErP Directive, the generators are able to operate with nitrogen oxide emissions below the limits required by said Directive

TAU N OIL PRO with power > 400 kW
The burners suggested to obtain the best performance of R TAU N OIL PRO >400 kW boilers are:

(required)
Oil burners
RL 85 / M BLU| x| | 09430033| 4031196 ()
RL 100 TL| x| x| 09430033|
RL 100/M TL| x| x| 09430033|
Mixed burners
RLS 120/M MX TL| x| x| 09430033| 4031196 ()
RLS 100| x| x| 09430033| 4031196 (*)

To replace on the flange fitted as standard
See the instruction manual provided with the burner:

• Burner installation
• Electrical connections
• Burner adjustments.

To assemble/disassemble the burners equipped with recirculation tube, it might be necessary to remove the latter before carrying out such operations (strictly comply with the use and maintenance manual of the burner).

Technical specifications

DESCRIPTION| TAU N OIL PRO|
---|---|---
450| 600| 800| 1000
Device type| Condensing boiler for central heating|
B23|
Fuel| All oils|
Device category| See Burner|
Rated heat input (Qmax) HCV (LCV)| 477

(450)

| 636

(600)

| 848

(800)

| 1060

(1000)

| kW
Rated heat input (Qmin) HCV (LCV)| 372

(351)

| 478

(451)

| 637

(601)

| 849

(801)

| kW
Useful (rated) heat output| 442| 589| 786| 982| kW
Rated maximum useful heat output (80/60°C) P4| 441,9| 589,2| 785,6| 982,0| kW
Rated maximum useful heat output (50/30°C)| 465,3| 620,4| 827,2| 1034,0| kW
30% heat output with return at 30°C (P1)| 132,6| 176,8| 235,7| 294,6| kW
Efficiency at rated heat input in high temperature mode η4 (80-60°C) HCV (LCV)| 92,6

(98,2)

| 92,6

(98,2)

| 92,6

(98,2)

| 92,6

(98,2)

| %
Efficiency at 30% rated heat input in low tempera- ture mode η1 with return at 30°C (HCV)| 98,1

(104,1)

| 98,1

(104,1)

| 98,1

(104,1)

| 98,1

(104,1)

| ****

%

Useful efficiency at max Pn (50-30°C)| 103,4| 103,4| 103,4| 103,4| %
Losses from stack for sensible heat (Qmax)| 1,9| 1,9| 1,9| 1,9| %
Losses from casing with burner on| 0,6| 0,6| 0,6| 0,6| %
Constant pressure drop| <1| %
Flue gas temperature (∆T)| < 45÷75 (*)| °C
Flue gas mass flow rate (Qmax)| 0,20| 0,26| 0,33| 0,43| kg/ sec
Furnace pressure| 5,0| 5,5| 5,7| 6,3| mbar
Furnace volume| 442| 496| 753| 845| dm3
Tot. volume of flue gas side| 737| 860| 1290| 1454| dm3
Heat exchange surface area| 21,8| 28,8| 39,6| 46,5| m2
Volumetric heat load (Qmax) (PCI)| 1018| 1210| 1062| 1183| kW/

m3

Specific heat load (PCI)| 20,1| 20,3| 18,5| 21,0| kW/

m2

Maximum condensate production| 52,2| 73,8| 88,0| 111,4| l/h
Maximum working pressure| 6| bar
Maximum permitted temperature| 110| °C
Maximum operating temperature| 95| °C
Pressure drop ∆T 10°C| 33,8| 30,2| 128,7| 121,5| mbar
Pressure drop ∆T 20°C| 9,0| 8,5| 28,7| 30,6| mbar
Water capacity| 743| 770| 1320| 1395| l

Depends on return temperature (30-60°C)
Values obtained with R diesel gas burners, calibrated with CO2 = 12,5%.

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, compromising 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 .

If you are installing a new boiler but re-using an old burner, 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’s blast tube and the refractory material in the door with the ceramic insulation (A) supplied with the boiler

| TAU N OIL PRO
---|---
115| 150| 210| 270| 350| 450| 600| 800| 1000
Burner head L min. (mm)| 110| 110| 170| 180| 180| 195| 200| 200| 200
Hole in door Ø (mm)| 162| 162| 162| 180| 180| 210| 210| 220| 220

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

Identification

The products are identified by:

Serial number plate
This is located on the boiler body and specifies the serial number, model, and furnace power.

Data plate
This lists the technical specifications and performance of the product. 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 replacement 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 installation and servicing may be rendered difficult.

SYSTEM MANAGER

Putting into service
Have R’s Technical Assistance Service start up your R TAU N OIL PRO 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 open
• While the system is still cold, check that working pressure in the central heating circuit is over 1 bar but below the maximum limit specified for the boiler
• 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 temperature control to the desired temperature (~20° C)
• Turn the boiler’s mains 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. 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 problem persists after that, call R’s Technical Assistance Service.

Preparing for extended periods of disuse
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 main system switch “off”
• Close the fuel cock and heating circuit water cock
• Drain the central heating circuit if there is any risk of freezing.

Contact your local R Technical Assistance Service if you encounter any problems in completing the above procedure.

Cleaning
Use a cloth damped in soapy water to clean the boiler’s external casing.
To remove stubborn marks, use a cloth damped in a 50% mix of water and denatured alcohol or a suitable cleaning product.

Carefully dry after cleaning.

• Do not use abrasive cleaning pads or powder detergents.
• Never clean the boiler without first disconnecting it from the mains electricity supply by turning the mains power switch and the control panel switch OFF.
• The combustion chamber and flue pipes must be cleaned periodically by the manufacturer’s Technical Assistance Service or by a qualified heating engineer.

Maintenance

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 designed to guarantee:

• Greater safety
• Compliance with applicable legislation
• Freedom from the risk of fines in the event of spot checks.

Regular maintenance is essential for the safety, efficiency and durability of the boiler.
Servicing is a legal requirement and must be performed at least once a year by a professionally qualified heating engineer.

Useful information

• Seller:……………………………………………………………………..
• Mr.:………………………………………………………………………..
• Address:………………………………………………………………….
• Tel.:………………………………………………………………………..
• Technical Assistance Service:………………………………………..
• Mr.:………………………………………………………………………..
• Address:………………………………………………………………….
• Tel.:………………………………………………………………………..
• Installer:………………………………………………………………….
• Mr.:………………………………………………………………………..
• Address:………………………………………………………………….
• Tel.:………………………………………………………………………..
• Fuel oil supplier:……………………………………………………….
• Mr.:………………………………………………………………………..
• Address:………………………………………………………………….
• Tel.:………………………………………………………………………..

INSTALLER

Unpacking the product
The TAU N OIL PRO boiler is supplied in two separate packages.

The first contains:

• Boiler body inside a protective cover (A);
• Burner nozzle protective padding kit (B)
• Condensate drain syphon (C) (*)
• Exchange pipes cleaning group (brush) (D)
• Document envelope (E) containing:
  • Instruction manual
  • Technical data plate adhesive (to be applied to the panelling when installing the boiler)
  • Hydraulic test certificate
  • Siphon cleaning warning label
  • Conventional warranty conditions

The instruction manuals are an integral part of the boiler, therefore we recommend to read and keep them with care.
The second package contains the panelling, complete with the assembly accessories, inside a protective cardboard box and a wooden crate.
For the boiler to function correctly, it must be connected to a R control panel and dedicated control accessories.

Overall dimensions and weights

DESCRIPTION| TAU N OIL PRO|
---|---|---
115| 150| 210| 270| 350| 450| 600| 800| 1000|
A – Base width| 690| 690| 690| 750| 750| 790| 790| 980| 980| mm
B – Width| 760| 760| 760| 820| 820| 890| 890| 1080| 1080| mm
L – Length| 1455| 1455| 1455| 1630| 1830| 2035| 2235| 2560| 2810| mm
L1 – Base depth| 1295| 1295| 1295| 1470| 1670| 1875| 2075| 2400| 2650| mm
H – Height of water fittings| 1315| 1315| 1315| 1450| 1450| 1630| 1630| 1910| 1910| mm
H1 – Boiler height| 1300| 1300| 1300| 1437| 1437| 1615| 1615| 1900| 1900| mm
D – Height of burner plate| 925| 925| 925| 1030| 1030| 1235| 1235| 1390| 1390| mm
Weight of boiler| 480| 510| 530| 677| 753| 1095| 1250| 1870| 2085| kg
Weight of casing| 50| 50| 50| 60| 70| 90| 120| 140| 160| kg

Handling

TAU N OIL PRO R steel boilers are fitted with lifting attachments. Take great care when moving them and only use lifting equipment of adequate capacity
Remove the transport straps and remove the wooden pallet before positioning the boiler.
Wear suitable personal protective equipment and use suitable safety devices.

Installation premises

• R TAU N OIL PRO steel boilers must be installed in a dedicated boiler room, with adequately sized vents, in compliance with applicable laws and standards.
• If at all possible, the boiler should be installed on a raised base to stop the burner fan sucking up dust and to facilitate installation of a condensate drain system.
• The boiler condensate drain must be located above the height of the lid of the system’s condensate neutraliser.
• The fuel oil supply line must be made in such a way as to allow both panelling disassembly and door opening with burner installed.
  • In Belgium, boilers must be installed according to standards NBN D51.003, NBN D30.003, NBN B61.002 (heat output < 70 kW), and NBN B61.001 (heat output >70 kW).
  • When installing the boiler, allow sufficient space around it to access all safety and control devices and to permit easy maintenance.
  • Do not install the boiler outdoors. It is not designed to work outdoors and is not fitted with the necessary automatic anti- frost systems to do so.

DESCRIPTION| TAU N OIL PRO|
---|---|---
115| 150| 210| 270| 350| 450| 600| 800| 1000|
B – Width| 750| 750| 750| 850| 850| 900| 900| 1000| 1000| mm
L – Length| 1350| 1350| 1350| 1620| 1820| 1930| 2140| 2400| 2700| mm
H1 – Overall height (boiler + base)| 1420| 1420| 1420| 1540| 1540| 1700| 1700| 2010| 2010| mm

Water in central heating systems

INTRODUCTION
Water used in central heating systems MUST be suitably treated to ensure the correct functioning of those systems and to guarantee an extended working life for boilers and all other system components. This applies not only to existing systems but to newly installed systems too. Sludge, lime-scale and pollutants present in the water can cause permanent damage to the heating unit, also within a short time and regardless of the quality standards of the materials used. Contact the Technical Assistance Service for any further information on type and use of additives.
Always conform to the standards and legislation applicable in the country of installation.

WATER IN CENTRAL HEATING SYSTEMS.
INSTRUCTIONS FOR THE DESIGN, INSTALLATION AND MANAGEMENT OF CENTRAL HEATING SYSTEMS. Chemical and physical characteristics of water
The chemical and physical characteristics of water used in central  heating systems must conform to the requirements of EN14868 standard and to the following tables:

STEEL BOILERS

with furnace power < 150 kW

| | Initial filling water| Regular service water (*)
ph| | 6-8| 7,5-9,5
Hardness| °fH| < 10°| < 10°
Electrical conductivity| μs/cm| | < 150
Chlorides| mg/l| | < 20
Sulphides| mg/l| | < 20
Nitrides| mg/l| | < 20
Iron| mg/l| | < 0,5
STEEL BOILERS

with furnace power > 150 kW

| | Initial filling water| Regular service water (*)
ph| | 6-8| 7,5-9,5
Hardness| °fH| < 5°| < 5°
Electrical conductivity| μs/cm| | < 100
Chlorides| mg/l| | < 10
Sulphides| mg/l| | < 10
Nitrides| mg/l| | < 10
Iron| mg/l| | < 0,5

values for water in system after 8 weeks of functioning

General note on water used to top up systems:

• If softened water is used to top up a system, 8 weeks of functioning after topping up, verify that the water in the system respects the above limits, in particular for electrical conductivity
• This check is not necessary if demineralized water is used to top up the system.

Central heating systems

• Do not use automatic filling devices to add water to central heating systems. Use a manual device instead and record top-ups in the system service book.
• If there are more than one boiler, they must all be put into service either contemporarily or with a very low rotation time during the initial period of service, so as to evenly distribute the limited quantity of initial lime-scale.
• A flushing cycle must be programmed after the plant has been installed to flush out any installation debris.
• Water used to fill a system for the first time and water used to top it up must always be filtered (using synthetic or metal mesh filters with a filtration rating of no less than 50 microns) to prevent sludge from forming and triggering deposit corrosion.
• The heating system must be flushed out and cleaned with good workmanship before filling up the existing systems. The boiler may not be filled until after the heating system has been flushed out.

New central heating systems
The system must be filled up slowly the first time; once it is filled and the air expelled it should never need to be topped up again. Systems should also be operated at maximum working temperature the first time they are started up, in order to facilitate de-aeration. (Gas is not released from the water at low temperatures).

Reconditioning old central heating systems
If a boiler has to be replaced, do not refill the entire central heating circuit if the quality of water in it conforms to requirements.
If the quality of water fails to conform to requirements, either recondition the old water or separate the water circuits (water in the boiler circuit must conform to requirements).

Corrosion

• Deposit corrosion
  Under-deposit corrosion is an electrochemical process, due to the presence of sand, rust, etc., inside the mass of water. These solid substances generally deposit on the bottom of the boiler (sludge), on tube and pipe heads or in the gaps between pipes and tubes.
  Micro-corrosion phenomena may be triggered off owing to the difference in electrochemical potential coming to be created between the material in contact with the impurity and the surrounding one.

• Stray current corrosion
  Corrosion from stray currents can occur due to the differing electrical potentials between water in the boiler and the metallic mass of the boiler or piping. This process leaves unmistakeable traces i.e. small regular conical holes.
  All metallic parts should be grounded by an efficient earth cable for this reason

Eliminating air and gas from central heating systems
If oxygen enters a circuit continuously or even intermittently (e.g. in under- floor heating systems whose pipes are not protected by impermeable synthetic sheaths, in circuits with open expansion vessels, or in circuits that require frequent top-ups) always separate the boiler’s water circuit from the central heating circuit.

Mistakes to avoid and precautions.
From what we have seen it is therefore important to avoid two factors possibly leading to the above mentioned processes i.e. contact between air and water in the installation and regular topping up with fresh water.

To eliminate contact between air and water (and to prevent the latter from becoming oxidized), it is necessary:

• For the expansion system to be a closed vessel type, correctly scaled and with the correct pre-loading pressure (to be regularly checked)
• For the installation to always be at a higher pressure than that of the atmosphere at any point (comprising the pump suction side) and under all running conditions (all the water sealing and couplings in the installation are designed to resist pressure towards outside, but not for depression)
• That the installation will not be made with materials permeable to gas (e.g. plastic pipes for floor systems without anti-oxygen barrier).
  Lastly we would remind you that the warranty does not cover breakdowns incurred by the boiler due to deposits and corrosion.

Glycol
The percentage of propylene glycol which can be used is dependent on the maximum delivery temperature and the project
ΔT as defined by the generator. To calculate the maximum percentage, use the graph below.

To calculate the freezing temperature associated with the mix, please see the technical datasheet for the product used.

IMPORTANT INFORMATION REGARDING HEAT-TRANSFER FLUIDS
Heat-transfer fluids are particularly important for protecting the system: efficient heat exchange, thanks to a good specific heat capacity; anti-freeze properties, important for the life of the system in the winter; and anti- corrosion properties to preserve the heating system components.

When choosing a heat-transfer fluid, consider the following:

• toxicity in the event of leakage, contaminating domestic water or water for animal/human use/contact

• biodegradability in the event of leakage into the environment
  All heat-transfer fluids recommended by Riello are non-toxic and in large part biodegradable.

  • Choose the liquid carefully and manage the heating system correctly to keep monitoring and maintenance work to a minimum, and reduce fluid changes.

Water connections
R TAU N OIL PRO boilers are designed and made for use in central heating installations, but can also be used for domestic hot water production if connected to a suitable storage cylinder. Water fittings are as specified in the following table

DESCRIPTION| TAU N OIL PRO|
---|---|---
115| 150| 210| 270| 350| 450| 600| 800| 1000
1 – Heating flow ()| 65| 65| 65| 65| 80| 100| 100| 125| 125| DN
2 – Heating return 1 (Low Temperature) ()| 65| 65| 65| 65| 80| 100| 100| 125| 125| DN
3 – Heating return 2 (High Temperature) (*)| 50| 50| 50| 50| 65| 80| 80| 80| 80| DN
4 – Safety device fitting| 1” 1/4| 1” 1/4| 1” 1/4| 1” 1/4| 1” 1/4| 1” 1/2| 1” 1/2| 80| 80| Ø ”- DN
5 – Boiler drain fitting| 1”| 1”| 1”| 1”| 1”| 1”| 1”| 1” 1/4| 1” 1/4| Ø”
6 – Condensate drain fitting| 1”| 1”| 1”| 1”| 1”| 1” 1/4| 1” 1/4| 1” 1/4| 1” 1/4| Ø ”- DN
7 – Flue gas exhaust fitting| 160| 200| 200| 250| 250| 300| 300| 350| 350| Ø mm
8 – Instrument bulb/probe sockets| 3 x 1/2”| 3 x 1/2”| 3 x 1/2”| 3 x 1/2”| 3 x 1/2”| 3 x 1/2”| 3 x 1/2”| 3 x 1/2”| 3 x 1/2”| n° x Ø ”
A – Distance from burner head to heat- ing flow outlet| 300| 300| 300| 300| 315| 311| 311| 410| 410| mm
B – Distance from heating flow outlet to return 1| 885| 885| 885| 1050| 1235| 1400| 1600| 1800| 2050| mm
C – Distance between heating returns 1 & 2| 200| 200| 200| 300| 250| 250| 300| 350| 350| mm
D – Distance between heating return 2 and safety device fitting| 285| 285| 285| 300| 450| 600| 700| 750| 850| mm
E – Distance between heating flow outlet and safety device fitting| 400| 400| 400| 450| 535| 550| 600| 700| 855| mm
F – Distance between heating return 1 and flue gas outlet| 200| 200| 200| 225| 225| 270| 270| 325| 325| mm
G – Height of condensate drain| 152| 152| 156| 156| 156| 215| 213| 195| 195| mm
H – Height of boiler flanges| 1340| 1340| 1340| 1450| 1450| 1630| 1630| 1910| 1910| mm
I – Height of flue gas outlet| 505| 505| 505| 535| 535| 635| 635| 680| 680| mm
L – Height of boiler drain fitting| 60| 60| 60| 60| 60| 82| 82| 86| 86| mm
M – Boiler centreline| 345| 345| 345| 375| 375| 395| 395| 490| 490| mm
N – Distance from burner head to door| 110| 110| 110| 120| 120| 125| 125| 125| 125| mm
O – Distance from Boiler drain fitting| 132| 132| 132| 137| 137| 125| 125| 175| 175| mm
P – Plinth| 100| mm

All flanged connections are PN6 according to EN 1092-1.

TYPICAL INSTALLATION SCHEMATIC

Direct systems

Direct and mixed systems

1. Boiler R TAU N OIL PRO
2. Central heating system manifolds
3. Disconnect valves
4. System pumps
5. Non-return valves
6. Automatic vent valve
7. Boiler safety valve
8. Boiler drain cock
9. Storage cylinder safety valve
10. System filling cock
11. CH expansion vessel
12. Remote controlled water tank (R 7200)
13. Storage cylinder drain cock
14. DHW expansion vessel
15. Water softener filter
16. Pressure reducer
17. Siphon
18. Condensate outlet
19. Drain
20. Water supply/top-up counter
21. Servo valve
    AT= High Temperature BT= Low Temperature

Condensate evacuation

TAU N OIL PRO condensing boilers produce a flow of condensate that varies according to operating conditions. The maximum hourly production of condensate is shown in the technical specifications table for each individual model.
The condensate outlet must be sized according to this value and at no point must the diameter be less than the diameter of the boiler condensate discharge (7). In order to avoid the release of combustion products in the thermal room, it is necessary to insert the trap supplied with the boiler in the condensation drain path. The connecting pipes between the boiler, siphon and waste water drain pit must be laid at a minimum down slope of 3° and must be installed in such a way as to prevent any build-up of. The siphon is equipped with a tapping point (G 1/8″) which a pipe can be connected to, to equalise the pressure between the siphon and the exhaust flue.

• Check and clean the condensation drain line on a yearly basis.
• The connection to the waste water drain pit must be made in compliance with national and local legislation and standards.

Before commissioning, fill the siphon with water up to level“L” in line with the top fitting.

Apply the label supplied with the siphon so that it is visible and legible.

Neutralising the condensate

The DNO 1, DNO 2, DNO 3 and HNO 1.6 neutraliser kits are available for neutralising the condensate.

NEUTRALISATION KIT DNO 1 – DNO 2 – DNO 3
DNO 1 – DNO 2 – DNO 3 neutralisers are designed for systems where the boiler room condensate drain point is located BELOW the boiler condensate outlet. This neutraliser does not require any electrical connections to be made.

NEUTRALISATION KIT HNO 1.6
HNO 1.6 neutralisers are designed for systems where the boiler room condensate drain point is located ABOVE the boiler condensate outlet. This neutraliser requires electrical connections to be made.

Description| DNO 1| DNO 2| DNO 3| HNO 1.6|
---|---|---|---|---|---
L – Width| 330| 420| 640| 640| mm
H – Height| 230| 240| 240| 240| mm
P – Depth| 200| 300| 400| 400| mm
Outlet hoses| G 1| G 1| G 1| G 1| inch
Drain hose| G 1| G 1| G 1| G 1| inch

Technical specifications

TYPE| DNO 1| DNO 2| DNO 3| HNO 1.6|
---|---|---|---|---|---
Quantity of activated carbon (approx.)| 0,3| 0,3| 0,3| 0,3| kg
Minimum granule quantity (approx.)| 5| 10| 22| 11| kg
Maximum granule consumption when filled (approx.)| ****

7

| ****

15

| ****

38

| ****

16

| ****

kg

Maximum granule filling quantity (ap- prox.)| ****

11

| ****

25

| ****

60

| ****

27

| ****

kg

Max. hours at full load (approx.)| 5500| 2100| 1600| 3200| hours
Maximum volumetric flow rate of conden- sate| ****

4

| ****

24

| ****

80

| ****

16

| ****

l/h

Heat output of asso- ciated boiler| up to 50| up to 300| up to 1000| up to 200| kW

The installer is responsible for choosing the most suitable neutraliser, according to the appliance characteristics and the type of system

Discharge of combustion products
The flue gas exhaust and stack connection must be made in compliance with applicable laws and standards, using heat resistant, condensate resistant and stress resistant rigid pipe and sealed joints. The stack must be fitted with a condensate trap and drain and the flue gas exhaust pipe must be installed at a slope of at least 3° towards the boiler.

DIMENSIONS (mm)| TAU N OIL PRO|
---|---|---
115| 150| 210| 270| 350| 450| 600| 800| 1000
H – Height of flue gas outlet| 515| 515| 515| 545| 545| 645| 645| 680| 680| mm
Ø i Diameter of flue gas fitting| 160| 200| 200| 250| 250| 300| 300| 350| 350| mm

• The stack must guarantee the minimum draught specified by applicable technical standards, assuming zero pressure at the connection to the flue gas exhaust.
• Inadequate or badly dimensioned stacks and flues can increase combustion noise and affect combustion parameters
• Uninsulated flues are potentially dangerous and can cause burns.
• Use flue gas exhaust systems with temperature class greater than 140°C.

Door hinges
The boilers are pre-fitted with three hinges so that the direction of opening of the door can be rapidly reversed. Once you have checked that the default direction of opening is as required, or have reversed the direction of opening as instructed in the ‘Changing the direction of door opening’ section, remove the spare hinge assembly ‘B’ (screw, bushing and washer) opposite the pivot side of the door. Two different door hinging systems have been used to satisfy varying constructional requirements:

System A
(on the smaller sizes) – comes with a bracket and two hinge fixing nuts.

System B
(on the larger sizes) – comes with a hinge fixing plate, a nut and an internal compression spring

Changing the direction of door opening

• The boiler door hinges are fitted on the right of the door in the factory.
• If you need to reverse the direction of opening, remove the boiler’s side panel and proceed as follows

System A – Smaller sizes

• First ensure that the main door fixing bolts (1) are tight and then remove the safety bolts (2).
• And lift off the door fixing brackets (3) nsert a spanner through the top slot and hold the bushing (4) steady. Unscrew the top bolt (5), then remove the bushing (4) and washer (6).

Reverse the above steps to fit the door on the opposite side.

System B – Larger sizes

• Open the door and with the aid of a small hacksaw or a file remove the knockout on the side opposite the leading edge of the door (both top and bottom).
• Then seal the door by tightening the bolts (2) so that the door is self-supported by compression against the packing. Remove the plug (1) taking care not to lose the compressed spring inserted in the threaded tube.

Remove the bolt (3) and the nuts (4). Remove the nuts (4) that secure the hinge plate (5) to the door and remove the plate.
Remount the hinge plate on the opposite side, ensuring that the cylinder projecting above the nut (6) enters into its slot. If necessary tighten the nut (6) to raise it. Lastly, tighten the bolt ((3).

Removing the hinge assembly “B”
System A

• First ensure that the side safety bolt (2) is tight and then remove the main fixing bolt (1)
• With the door open, remove the hinge assembly ‘B’ (bushing, bolt, and washer) opposite the pivot side of the door

Earth connection

A terminal is provided on the front boiler head to connect the boiler body to an efficient earth system. Proceed as follows.

• Unscrew the nut and washer (1) from the earth terminal
• Attach the earth cable’s eye connector (2) to the terminal. (Make sure that the cable is of adequate size and complies with legislation in the country of installation)
• Fit the nut and washer (1) to the earth terminal and tighten the nut
• Connect the other end of the cable to the system’s earth bar.

Another hole (*) in the left side of the boiler head can also be used to earth the appliance. If you wish to use this hole for the earth connection, remove the terminal fittings from the right of the head and move them to the left earthing point.

Fitting the casing panels
To mount the panelling, proceed as follows:

• Push out the pre-formed slots in the boiler’s side panel (2) or (3) depending on what side you want to install the control panel) corresponding to the oval cable grommets in the control panel
• Perforate the membranes of the control panel cable grommets. Route the electrical cables through them and insert the sensors in their sockets
• Fix the control panel (20) to the boiler casing using thescrews provided
• The front side panels (2) and (3) and rear side panels (4) and (5) over the boiler frame (1) and to the top side beams.

On models 450, 600, 800, 1000, also fit side panels (6) and (7).

• Secure the side panels in place using the top cross beams (8) and the screws provided
• Fit the top rear panel (9), the bottom rear bracket (10) and then the bottom rear panels (11) and (12). Fit the front top panel (13)
• Fit the top panels (14), (15), (16) and (17)
• Smaller models have only two top panels, one over the right and one over the left of the boiler
• Finally, fit the front trim panels (18) and (19).

Once the panelling has been fitted, attach the follow adhesive labels:

1. Data plate: this lists the technical specifications and performance of the product. It comes inside the documentation envelope.
2. Siphon cleaning label: this label serves as a reminder to clean the siphon and the connecting pipes.

The labels can be found in the document pouch. The appliance installer MUST apply these labels, as shown in the figure below, once installation is complete. They must be visible. If the labels are lost, please request new ones from the R Technical Assistance Service.

TECHNICAL ASSISTANCE SERVICE

Preparing for initial startup
It is essential to perform the following checks before starting up or testing the functioning of your R TAU N OIL PRO boiler. In particular, check that:
The turbulators (1) are correctly positioned (vertical position) inside the heat exchanger tubes and the clips (2) are resting against the wall (3) of the heat exchanger

The water and gas cocks are open

• The expansion vessel is properly charged
• The working pressure in the heating circuit is over 1 bar but below the maximum limit specified for the boiler
• The water circuits have been properly bled
• The condensate discharge siphon has been filled with water
• The mains power connections to the boiler and its accessories (burner, pump, control panel, thermostats, etc.) have been properly made.
  • The phase-neutral polarity has been respected.
  • A ground (earth) connection is obligatory.

Initial startup
Once you have completed all the preparatory steps, proceed as follows to start up the boiler for the first time:

• Turn the boiler’s mains power switch ON
• If the system is equipped with a temperature controller or timer thermostat, make sure that it is switched 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
• Adjust the timer thermostat/s or temperature controller to the desired temperature (~20°C);

The burner should now ignite and remain in operation until the set temperature is reached.
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.

This operation can be repeated 2 or 3 times at the most. If the problem still persists after that, check:

• Check that all the instructions in the burner manual have been performed properly
• Check that the instructions in the ‘Preparing for Initial Startup’ section have been performed properly
• Check that all the electrical connections shown on the control panel wiring diagrams have been performed properly.

Checks during and after initial start-up
Once the boiler has started up, make sure that it shuts down and re-starts properly when the following actions are taken:

• Set the boiler thermostat to the required setting (making sure that the temperature control is in manual mode)
• The control panel is switched OFF
• Set the room thermostat or timer to the required temperature.

1. Make sure that there are no leaks around the boiler door seal. If you detect any leakage of fumes, increase the tightening of the door fixing bolts.
2. Make sure that all the pumps in the system are free and rotate in the right direction
3. Turn off the main power switch to the boiler and make sure that the boiler shuts down properly.
4. Provided all the above conditions are satisfied, start the boiler up again, then analyse the combustion fumes, measure fuel flow and re-check the door seal

Maintenance
Regular maintenance is a legal requirement. It is also essential for the safety, efficiency and durability of the boiler. Proper maintenance keeps consumption and emissions down, and ensures that the boiler continues to operate reliably over time. Have your boiler serviced either by R’s Technical Assistance Service or by a qualified heating engineer. Analyse the combustion fumes before commencing any maintenance.
The results of fume analysis can give a clear idea of what servicing or repairs are needed.

• Turn the system’s main power switch OFF
• Close all the gas cocks

OPENING THE DOOR

• System A
  Make sure that the safety bolts (1) on the side of the boiler are tight.

• System A – B
  To open the door, simply remove the main fixing bolts 2 holding the door in place.

The first time you open the door, remove the spare hinge assembly ‘B’ (bushing, bolt, and washer) opposite the pivot side of the door.

ADJUSTING THE DOOR
Make quite sure that the door presses uniformly all around the double seal to prevent dangerous fumes escaping into the air from the pressurized furnace. Proceed as follows to adjust the door seals:

System A

• Fit the door and tighten the main fixing bolts (2) until the seals start to compress
• Loosen the safety bolts (1) then fully screw in the main door fixing bolts (2)
• Make sure that the door is properly adjusted after every maintenance operation

System B

• Put the door in its correct position and tighten the main locking screws (2) until the packing starts to be compressed.
• Make sure that the door is properly adjusted after every maintenance operation.

Cleaning the boiler
Clean the boiler and remove any carbon deposits from the surfaces of the heat exchanger at least once a year. This not only extends the boiler’s working life, but also keeps it efficient in terms of heat output and consumption.

Proceed as follows to clean the boiler:

• Open the front door (1) and remove turbolators (2)
• Use a flue brush (3) or other suitable tool to clean inside the combustion chamber and the flue gas pipes
• Remove the deposits accumulated in the flue box through the opening of the inspection door (4).

If more thorough cleaning is required, remove the outer panels, unscrew the eight fixing bolts and pull firmly on the flue gas box (5) to remove it from the boiler.
Check at regular intervals that the condensate drain (7) is not blocked.

If necessary, replace the seal (8).

• On completion of cleaning, follow the above steps in the reverse order to refit all removed parts.
• Use a tightening force of 8 Nm on the retaining nuts.

Clean condensation trap

• Disconnect the corrugated condensate outlet pipes (1) and the tapping point pipe (2), and remove the inspection cover (3).
• It is mandatory to check and clean the condensation trap and pipes, up to the collection/drain point, at least once a year.

On completion of cleaning, follow the above steps in the reverse order to refit all removed parts.

Troubleshooting

The boiler does not reach its temperature setpoint

| Boiler dirty| − Clean the flue gas pipes
Heat exchanger and burner mismatched| − Check specifications and settings
Burner capacity insufficient| − Check and adjust the burner
Control thermostat faulty| − Check correct functioning

− Check the temperature setting

The boiler keeps shutting down, and the control panel warning light comes on

|

Control thermostat faulty

| − Check correct functioning

− Check the temperature setting

− Check the electrical wiring

− Check the sensors

No water supply Air in the circuit| − Check the circuit pressure

− Check the vent valve

The generator is at temperature but the heating system is cold

| Air in the circuit| − Bleed the circuit
Pump malfunctioning| − Check/unseize the pump
Problem with minimum temperature thermostat (if present)| − Check the temperature setting

There is a smell of fumes

|

Fumes escaping into the air

| − Clean the boiler body

− Clean the flue gas pipes

− Check that the boiler, flue pipes and flue gas exhaust stack are all properly sealed

The safety valve keeps opening

|

Incorrect circuit pressure

| − Check the circuit pressure

− Check pressure reducer functioning

− Check pressure reducer setting

CH expansion vessel| − Check the efficiency of the expansion vessel
There are traces of condensate on the rear head| Flue gas box seals| − Check the seals between the rear head and the flue gas box

RIELLO S.p.A. Via Ing. Pilade Riello, 7 37045 – Legnago (VR)
www.riello.com
The manufacturer strives to continuously improve all products. Appearance, dimensions, technical specifications, standard equipment and accessories are therefore liable to modification without notice

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