Riello TAU 150 N Installation, Operation & Maintenance Instructions Manual
Tau series stainless steel condensing boiler
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Summary of Contents for Riello TAU 150 N
- Page 1 STAINLESS STEEL CONDENSING BOILER 150 N ÷ 1450 N 150 NC ÷ 600 NC INSTALLATION, OPERATION, MAINTENANCE AND SYSTEM MANAGEMENT MANUAL...
- Page 2 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 RANGE MODEL CODE TAU 150 N 4031860.0 TAU 210 N 4031861.0 TAU 270 N 4031862.0 TAU 350 N 4031863.0...
- Page 3 TAU 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°...
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Page 4: Table Of Contents
CONTENTS GENERAL Page General safety information Safety precautions Product description Control panels Recommended burners Product identification Accessories Technical specifications SYSTEM MANAGER Initial start-up Preparing for extended periods of disuse Cleaning Maintenance Useful information INSTALLER Unpacking the product Overall dimensions and weights Handling Place of installation Water in the central heating circuit... -
Page 5: General
GENERAL SAFETY INFORMATION TAU boilers are delivered in separate crates. Check Periodically check that operating pressure in the that the appliance is complete and undamaged as heating circuit is over 1 bar but below the maxi- soon as you receive it. Report any discrepancies mum limit specified for the appliance. -
Page 6: Product Description
PRODUCT DESCRIPTION Le caldaie in acciaio r TAU steel boilers are triple flue TAU boilers feature lightly pressurised combustion cham- pass, condensing boilers for installation in a boiler room. bers for a smoother burner action, and high temperature While they are designed primarily for central heating resistant, stainless steel turbulators inside the tube bun- purposes, in conjunction with a suitable storage cylinder dle for maximum burner efficiency. -
Page 7: Control Panels
CONTROL PANELS The r control panels that can be used with r 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. TECH CLIMA TOP for central TECH CLIMA COMFORT for heating (1 direct zone and 2 central heating (1 direct zone... -
Page 8: Product Identification
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. Ø - Make sure that the length and diameter of the burner nozzle are as specified in the following table. -
Page 9: Accessories
ACCESSORIES The following accessories are available, to be ordered separately: 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 TECHNICAL SPECIFICATIONS Description... -
Page 10: System Manager
INITIAL START-UP Have r’s Technical Assistance Service start-up your may need to re-start it without involving the Technical r TAU boiler for the first time. Once this has been Assistance Service. done, the boiler can be left to function automatically. To do so, perform the following checks and operations: Under certain circumstances, such as after long periods of disuse, the service engineer responsible for the boiler... -
Page 11: Preparing For Extended Periods Of Disuse
The burner should now ignite and remain in operation If a “LOCKOUT SHUTDOWN” occurs, wait about 30 until the set temperature is reached. seconds before resetting the burner. The burner will then switch off and on automatically to maintain the set temperature without further operator To reset the burner, press the red button light on the action. -
Page 12: Cleaning
CLEANING 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. The combustion chamber and flues must be cle- aned periodically by r’s Technical Assistance Service or by a qualified technician (see page 35). -
Page 13: Useful Information
USEFUL INFORMATION Seller: Installer: ....................................................................................................................Address Address ......................................................Tel. Tel............................................................Technical Assistance Service: ............................................Address ............................Tel............................... Date Work done SYSTEM MANAGER... -
Page 14: Unpacking The Product
UNPACKING THE PRODUCT r TAU 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); - Certificate of Warranty and water test certificate;... -
Page 15: Overall Dimensions And Weights
OVERALL DIMENSIONS AND WEIGHTS DESCRIPTION BOILER model 800 N 1000 N 1250 N 1450 N N-NC N-NC N-NC N-NC N-NC N-NC A - Base width 1070 1130 B - Overall width 1060 1060 1180 1225 L - Depth 1455 1455 1630 1830 2035... -
Page 16: Place Of Installation
PLACE OF INSTALLATION steel boilers must be installed in a dedicated When installing the boiler, allow sufficient space boiler room, with adequately sized vents, in compliance around it to access all safety and control devices with applicable laws and standards. and to permit easy maintenance. -
Page 17: Water In The Central Heating Circuit
HEATING CIRCUIT WATER INTRODUCTION Layout showing the water treatment devices required by Italian standard UNI-CTI 8065, according to the sy- The water used in the central heating system MUST be stem’s overall heat output suitably treated to ensure the correct functioning of the system and to guarantee an extended working life for the boiler and all other system components. - Page 18 Identification of water treatments required by Italian 2.1 Limescale deposits Limescale forms when the calcium and magnesium bicar- standard UNI CTI 8065 bonates that are dissolved in the water at ambient tempe- rature become chemically transformed when the water is A resin ion exchange type water softener is required.
- Page 19 Remember that air dissolved in water has an oxygen con- from all parts of the system. The formation of corrosion tent of around 35%, far higher than air in its natural ga- can easily be detected by analysing the chemical com- seous state.
- Page 20 3. New central heating systems 4. Reconditioning old heating systems Mistakes to avoid and precautions Frequent mistakes and necessary precautions From what has been said above we can see that it is es- Frequently, when old central heating systems are recondi- sential to avoid two main factors that could lead to corro- tioned, especially when old boilers are replaced, it is im- sion.
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Page 21: Water Connections
5. Eliminating air and gas from central heating sy- stems. Another problem that is frequently ignored, even when These gases have to be eliminated as they are formed, designing new heating systems, is the need to eliminate and this means that the system needs to be designed and the air and other gases that form in the circuit. - Page 22 Mod. TAU 1450 N The choice of system components and the method Circuits filled with anti-freeze must be fitted with of their installation are left up to the installer. water disconnectors. Installers must use their expertise to ensure proper installation and functioning in compliance with all applicable legislation.
- Page 23 INSTALLER...
- Page 24 INSTALLER...
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Page 25: Condensate Drain
DRAINING THE CONDENSATE TAU condensing boilers produce a flow of condensate that varies according to operating conditions. The maxi- mum hourly production of condensate is shown in the technical specifications table for each individual model. The condensate drain system must be suitably dimen- sioned to cope with the flow produced. - Page 26 If it ever proves necessary to neutralise the condensate that HN2-NH3 forms in the flue gas stack, connect the condensate drain fittings of the boiler and flue gas stack together using a ‘T’ union and connect the leg of the ‘T’ to the inlet of the N2 or N3 neutralisation unit.
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Page 27: Combustion Gas Exhaust
COMBUSTION GAS EXHAUST The stack must be fitted with a condensate trap and The flue gas exhaust and stack connection must be drain and the flue gas exhaust pipe must be installed at made in compliance with applicable laws and standards, a slope of at least 3°... -
Page 28: Changing The Direction Of Door Opening
CHANGING THE DIRECTION OF DOOR OPENING The boiler door hinges are factory fitted on the right of the door. If you need to reverse the direction of opening, remove the boiler’s side panel and proceed as follows. Smaller sizes (system A) First ensure that the main door fixing and lift off the door fixing brackets nsert a spanner through the top slot... -
Page 29: Removing The Hinge Assembly "B
Larger sizes (system B) Open the door and with the aid of a Remove the plug (1) taking care not to lose the compressed small hacksaw or a file remove the spring inserted in the threaded tube. knockout on the side opposite the le- ading edge of the door (both top and bottom). -
Page 30: Fitting The Panelling
FITTING THE PANELLING To mount the panelling, proceed as follows: On models 450 N-NC, 600 N-NC, 800 N, 1000 N, 1250 - Push out the pre-formed slots in the boiler’s side panel N, 1450 N, also fit side panels (6) and (7). (2) or (3) depending on what side you want to install the - Secure the side panels in place using the top cross control panel) corresponding to the oval cable grom-... -
Page 31: Preparing For Initial Start-Up
PREPARING FOR INITIAL START-UP It is essential to perform the following checks before starting up or testing the functioning of the boiler. In par- ticular, check that: - The turbulators (1) are correctly positioned (horizontal) inside the heat exchanger tubes and the clips (2) are resting against the wall (3) of the heat exchanger. -
Page 32: Initial Start-Up
INITIAL START-UP Once you have completed all the preparatory steps, pro- ceed as follows to start up the boiler for the first time: - Since the control panel incorporates a temperature control function, make sure that the control panel is switched on. -
Page 33: Checks During And After Initial Start-Up
CHECKS DURING AND AFTER INITIAL START-UP Once the boiler has started up, make sure that it shuts down and re-starts properly too. Proceed as follows: - Set the boiler thermostat to the required setting (mak- ing sure that the temperature control is in manual mode). -
Page 34: Maintenance
MAINTENANCE Regular maintenance is one of the requirements of Presi- down, and ensures that the boiler continues to operate dential Decree 412 of the 26th August 1993. It is also es- reliably over time. Have your boiler serviced either by r’s Technical Assi- sential for the safety, efficiency and durability of the boiler. -
Page 35: Cleaning The Boiler
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 consump- tion. -
Page 36: Troubleshooting
TROUBLESHOOTING PROBLEM CAUSE CORRECTIVE ACTION The boiler does not reach Heat exchanger dirty Clean the flue gas pipes its set temperature Heat exchanger and burner Check specifications and mismatched settings Insufficient gas flow to burner Check and adjust the burner Control thermostat problem Check the functioning of the ther mostat... -
Page 37: Appendix
APPENDIX Extract from Italian standard UNI 8065: The pH value, referred to 25°C, expresses how acidic or ‘Water Treatment in Domestic Heating Systems’ basic a solution is, in a scale from 0 to 14. The purpose of this standard is: - 0 defines maximum acidity - to establish acceptable ranges for the chemical and - 7 defines neutrality... - Page 38 Hardness Water analysis The total hardness of a water sample is an expression Water must be properly analysed to identify the type of of the sum total of all the calcium and magnesium salts treatment it needs. dissolved in it. The temporary hardness value expresses the sum total Typical heating system water problems and possible only of calcium and magnesium bicarbonates.
- Page 39 Microbial growth Description of physical and chemical-physical In this context, the term ‘microbial’ refers to any form of treatments organic life normally classifi ed as algae, fungi, moulds and bacteria. Filtration Their growth is favoured by light, heat, sludge and acci- Purpose dental pollution.
- Page 40 Classification of conditioners The following table lists the various types of chemical wa- ter conditioner, arranged according to action and charac- teristics of the most common product. Conditioners can be used alone or in combination with other products, if more than one effect is required. Types of chemical conditioner Action Purpose...
- Page 41 Dosing system - circulation through open expansion vessels The dosing system must permit reactants to be added at - use of unsuitable materials the desired points in the heating system, and at the fl ow - inadequate venting rates and at concentrations needed to maintain water pa- rameters within the required ranges.
- Page 42 Advice on sampling In order to arrive at a correct analysis of the chemical and physical characteristics of a water sample, sampling systems and methods must be capable of guaranteeing precision and repeatability. The sampling system must, in addition, not add further contaminants to the sample.
- Page 43 Recommendations and requirements Recommendations and requirements for the customer The customer must provide the following details in order to permit the supplier to identify and supply the systems, appliances and chemical conditioners needed to treat the water correctly: - characteristics of the system: type (heating, domestic hot water), delivery/fl...
- Page 44 RIELLO S.p.A. - 37045 Legnago (VR) Phone 0442630111 - Fax 044222378 - www.riello.it As part of the company’s ongoing commitment to perfecting its range of products, the appearance, dimensions, technical data, equipment and accessories may be subject to variation.