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For the installer Instructions for installation and servicing ecoTEC Wall hung room sealed fan assisted condensing boiler ecoTEC plus 612 ecoTEC plus 615 ecoTEC plus 618 ecoTEC plus 624 ecoTEC plus 630 ecoTEC plus 637 ecoTEC plus 824 ecoTEC plus 831 ecoTEC plus 837 ecoTEC pro 28 ecoTEC pro 24...
1 Introduction Introduction Validity of the manual This installation manual applies exclusively to units with Notes on the documentation the following part numbers: The following information is intended to help you - 0010004108 - 308525 throughout the entire documentation. - 308511 - 308526 Further documents apply in combination with this - 308520...
Intended use The Valliant ecoTEC are state-of-the-art appliances which have been constructed in accordance with Vaillant Ltd. supports the Benchmark initiative. recognised safety regulations. Nevertheless, danger to At the rear of this guide, you will find a the life and limb of the user or third parties can still Benchmark gas boiler commissioning checklist.
2 Boiler specifications Boiler specifications Technical data ecoTEC plus ecoTEC pro Technical data Units CH heat output range 80 °C flow/60 °C return 6.7 – 19.0 8.7 – 24.0 12.0 – 28.0 6.7 – 19.0 9.0 – 24.0 60 °C flow/40 °C return 6.9 –...
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Boiler specifications 2 ecoTEC plus Technical data Units CH heat output range 80 °C flow/60 °C return 4.9 – 12.0 4.9 – 15.0 6.7 – 18.0 8.7 – 24.0 10.0 – 30.0 12.0 – 37.0 60 °C flow/40 °C return 5.1 –...
2 Boiler specifications Dimensions ecoTEC plus 630: ecoTEC plus 637, ecoTEC plus 837: Fig. 2.1 Dimensions in mm Legend: Heating return pipe Ø 22 mm 2 Cold water connection Ø 15 mm (combination boilers only) 3 Gas connection Ø 15 mm 4 Hot water connection Ø...
Boiler specifications 2 Installation Fig. 2.2 Function elements of combination boilers Fig. 2.3 Function elements of system boilers Legend: Legend: Expansion vessel Expansion vessel 2 Air intake pipe 2 Air intake pipe 3 Burner module 3 Burner module 4 Ignition electrode 4 Ignition electrode 5 Fan 5 Fan...
This appliance should only be installed in conjunction with Part 2 Specification for installation and maintenance either a Vaillant flue system or an alternative approved of ventilation for gas appliances. system (details of flue approval categories can be found in the technical section of the installation manual).
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General requirements 3 Fig. 3.1 Contents included with delivery of ecoTEC plus Fig. 3.2 Contents included with delivery of ecoTEC plus system boilers combination boilers DO NOT remove the boiler from the polystyrene base at DO NOT remove the boiler from the polystyrene base at this stage.
3 General requirements Note If a room sealed boiler is installed in a room with a bath or shower, electrical switches or boiler controls using the mains power supply must be placed at locations that cannot be reached by the person in the bath or shower. Note If the boiler is to be installed in an airing cup- board it is not required to separate the boiler...
Vaillant flue pipes. Malfunctions can occur if you use other accessories. These may result in damage and injury. You will find a list of genuine flue pipes in the Vaillant installation manual for flue pipes. Fig. 3.6 Art. No. 303 209 The CE mark is valid only if the appliance is operated with Vaillant flue pipes.
3 General requirements In order to ensure that the condensate plume does not affect adjacent surfaces the terminal should be extended as shown in Fig. 3.9. 2) Dimension F: This clearance may be reduced to 25 mm without affecting the performance of the boiler. However, in order to ensure that the condensate plume does not affect adjacent surfaces a clearance of 300 mm is preferred.
General requirements 3 3.10 Guide to system requirements Vaillant accepts no liability for the compatibility of any additive or its effectiveness in the entire heating 3.10.1 Water circulation system system. Detailed recommendations for the water circulation system are given in BS 6798 and BS 5449: Part 1 (for Additives for cleaning purposes small bore and micro bore central heating systems).
3 General requirements Total heating Total hardness at 20 l/kW Total hardness at > 20 l/kW Total hardness at > 50 l/kW output for the smallest boiler heating < 50 l/kW for the smallest boiler for the smallest boiler heating surface heating surface surface...
4 Boiler installation sequence Boiler installation sequence movements during lift. Avoid upper body/top heavy bending - do not lean forward/sideways. Clear the route Transporting the appliance before attempting the lift. If removing boiler from truck straddle the load and tilt forwards to facilitate secure Caution! grip.
Boiler installation sequence 4 Positioning of Appliance for Final Installation – above with good grip to protect against sharp edges and worktop, foreseeable obstructions etc. ensure good grip when handling appliance. It is recom- This appliance is deemed to be a one person lift when mended a risk assessment of the roof space area be removed from the carton.
4 Boiler installation sequence 4.2.2 Unpack the boiler • Fix the paper template to the wall ensure that the To unpack the boiler, cut both plastic carton straps, template is vertical. open box and lift out the polystyrene top packing. Lift the cardboard box upwards.
Boiler installation sequence 4 Installing the flue system - The appliance is fitted with an expansion vessel • Install the flue system (refer to the seperate air/flue (10 l/0.75 bar). duct installation instructions). • Before assembling the appliance check if this volume is adequate.
4 Boiler installation sequence 4.10 Cold water mains inlet and hot water outlet (ecoTEC combination boilers only) Fig. 4.5 Fitting the gas connection (example ecoTEC plus com- bination boiler) • Fit the union nut (2) and the compression olive (3) to the gas connection pipe (1) of the boiler.
Boiler installation sequence 4 Note Flush all foreign matter from the mains supply before connecting to the boiler. • Insert the seal (1) and connect the service valve (2) to the appliance cold water connection. • Fit the union nut (4) and the compression olive (3) to the pre-formed tail provided with ecoTEC plus appliances (5).
4 Boiler installation sequence 4.12 Heating connection ecoTEC pro combination boiler Caution! When making final connection to the boiler, if using soldered fittings, extra care should be taken to avoid damage to isolation valves through heat transfer. 4.12.1 Heating flow and return connection Note Before connecting the heating circuit to the boiler, all pipework and radiators must be...
Boiler installation sequence 4 Caution! 4.14 Electrical connection To ensure fumes do not escape through the syphon of the boiler the trap must be filled with water be- 4.14.1 General requirements fore the boiler is turned on. Therefore the discharge pipework should be installed so as not to interfere Danger! with the removal and refitting of the condensate...
4 Boiler installation sequence 4.14.2 Connection to the main supply - + 7 8 9 3 4 5 - + 7 8 9 3 4 5 Fig. 4.14 Wiring system • Connect the flex to the L, N and earth plug to the terminal block.
Boiler installation sequence 4 4.14.3 Electric board layout eBUS accessory connection Burner cable harness Accessory module connection Diagnosis via eBUS, vrnetDIALOG outer probe ext. flow or return probe Hydraulic cable harness Connection for external eBUS controller Caution: Do not connect Room thermostat 24 V: supply voltage! Connection 7, 8 and 9...
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4 Boiler installation sequence Ignition electrode flow return X 20/5 red X 20/7 black X 20/8 blue X 20/7 black X 20/13 black Thermal fuse X 20/12 black Gas valve assembly Fan unit Plug coupling X 20/16 blue (earth) X 20/4 grey (PWM) X 20/3 black (Hall signal) X 20/18 red (24 VDC) X 20/17 red (24 VDC)
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Boiler installation sequence 4 return Ignition electrode flow X 20/5 red X 20/7 black X 20/8 blue X 20/7 black X 20/13 black Thermal fuse X 20/12 black Fan unit Gas valve assembly Plug coupling X 20/16 blue (earth) X 20/4 grey (PWM) X 20/3 black (Hall signal) X 20/18 red (24 VDC) X 20/17 red (24 VDC)
3 and 4. Terminal 5 is an additional 4.15.4 Vaillant optional plug in timer accessories neutral connection for external neutrals such as from Refer to the instructions supplied with the optional the anticipator of a room thermostat.
Boiler installation sequence 4 4.16 Thermostatic radiator valves The boiler has a built in automatic by-pass valve making it ideal for use in systems with thermostatic radiator valves (no separate system by-pass is required). For optimum fuel economy where TRV’s are used they must be used in conjunction with a boiler control interlock.
5 Commissioning Part I Commissioning Part I This corresponds to a filling pressure between 1.0 and 2.0 bar. If the pointer is in the light grey area, refill Preliminary electrical checks water. Check the electrical installation by carrying out short If the heating system extends over several storeys, the circuit, earth continuity and resistance to earth tests system may require a higher filling pressure.
Commissioning Part I 5 The ecoTEC plus combination boiler will be delivered 5.4.4 Filling the heating system for the first time with a filling loop. Note • Insert the double check valve (1) of the filling pipe at the cold water shutoff valve and secure the double As long as there is insufficient water pressure check valve with the spring clip (2).
5 Commissioning Part I Filling the condensate siphon Fig. 5.5 Adjusting the by-pass valve (in combination boilers) Fig. 5.4 Filling the condensate siphon Danger! Note that if the boiler is run with an empty condensate trap there is a danger that fumes might escape into the room and cause poisoning.
Commissioning Part I 5 If the boiler version corresponds to the local gas family: • Proceed as described below. If the boiler version does not correspond to the local gas family: • Perform the gas conversion in accordance with the gas conversion kit 0020010641.
5.9.3 Checking the gas inlet working pressure ance limits specified in Table 5.1, do not operate the • Ensure that the gas inlet working pressure can be boiler and inform the Vaillant Service Solutions obtained with all other gas appliances in the property (0870 6060 777).
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- Only for combination boilers: Allow the boiler to cool company or the Vaillant Service Solutions team and down by turning off water taps and allow pump proceed as follows: overrun to operate for a minimum of two minutes.
5.12 Gas changeover Note To reset the appliance from natural gas to LPG mode, you need the Vaillant conversion kit Art. No. 00 2001 0641. To reset the appliance from LPG to natural gas mode, you need the Vaillant conversion kit Fig.
Functional checks (commissioning part II) 6 Functional checks (commissioning part II) plus Functional checks 6.1.1 Procedure After installing and checking the gas supply pressure, perform a function check before commissioning the appliance and handing over to the user. • Commission the appliance according to the relevant operating manual.
Immediate help • Instruct the user in the safe and efficient operation of If your Vaillant boiler develops a fault your first action the boiler, in particular the function of should be to contact your installer, as his professional –...
To ensure the faultless operation, long term availability In addition BS 6798: 2009 “Specification for installation and of all functions and long working life of your Vaillant maintenance of gas-fired boilers of rated input not exceeding boiler and to prevent modifications to the approved 70 kW net”...
7 Inspection and maintenance - Correctness of electrical, water and gas connections. • Check the boiler for gas and water leaks. - Correctness of the water pressure. • If necessary, refill and re-bleed the heating - The condition of the whole system, in particular the installation.
- the integrity of the combustion circuit seals higher than allowed in Table 7.1, call the - the gas inlet working pressure Vaillant Service Solutions. - the gas flow rate. • Do not start up the boiler! If the flue gas value needs to be adjusted, •...
7 Inspection and maintenance 7.1.5 Inspection and maintenance work steps Column 2 Maintenance Column 1 must be carried Inspection must No. Activity out at regular be carried out intervals – but each year no longer than 5 years Check the air flue gas installation for leaks and for proper fixation and ensure it is not blocked or damaged and is fitted correctly, complying with the relevant installation instructions.
Inspection and maintenance 7 Servicing the burner module • Disconnect the gas supply (3) on the gas valve. Ensure the corrugated gas pipe does not twist by holding the 7.2.1 Removing the burner module flattened section of the pipe, with an open ended The burner module consists of the burner, fan, gas valve spanner, whilst loosening the union nut.
7 Inspection and maintenance 7.2.2 Cleaning the integral condensation heat 7.2.3 Checking the burner exchanger Caution! Protect the electronics box against sprayed water. Fig. 7.5 Checking burner The burner (1) is maintenance-free and needs no cleaning. • Check the burner surface for damage, replace the burner if necessary.
Inspection and maintenance 7 • Reconnect the gas supply (3) to the gas valve, ensuring that a new sealing washer is used and correctly located. Use the spanner flat at the flexible gas line to hold the gas fittings. Fig. 7.9 Testing the gas supply for soundness •...
7 Inspection and maintenance • Clean the siphon part section by rinsing it out with Test operation water. Always perform the following checks after completing • Fill the lower part with water until about 10 mm below any maintenance task: the upper edge.
Troubleshooting 8 Troubleshooting 8.1.2 Diagnostic codes Logical fault finding procedure Display Meaning These checks must be carried out before attempting to Heating mode (all models): use the fault finding guide. S. 0 No heat demand 1. Carry out electrical safety checks (see section S.
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8 Troubleshooting In the diagnostic mode, you can change certain The display shows the relevant diagnostic information. parameters or display more information. • If necessary, use the “+” or “–” keys to change the The diagnostic information is divided into two diagnostic value (display flashes).
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Digitised ionisation potential Display range of 0 to 102, > 80 no flame, < 40 even flame Outside temperature d.47 Actual value in °C (with weather compensating Vaillant controller only) d.67 Remaining burner anti cycling time in min d.76 Appliance variant (device specific number) 00 to 99 d.90...
8 Troubleshooting Display Meaning Display value/adjustable value d.50 Offset for minimum speed in rpm/10, adjustment range: 0 to 300 d.51 Offset for maximum speed in rpm/10, adjustment range: -99 to 0 d.58 From the third quarter of 2006: Setting range: 0 to 3 Activation of solar reheating 0 = solar reheating disabled (factory setting) 3 = activation of min.
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Troubleshooting 8 Code Meaning Cause NTC broken, NTC cable broken, Defective connection at NTC, F. 0 Flow–NTC open circuit Defective connection at electronics Return–NTC open circuit NTC broken, NTC cable broken, Defective connection at NTC, F. 1 Defective connection at electronics F.10 Flow NTC short circuit NTC defective, short circuit in cable harness, cable/casing shortcut...
8 Troubleshooting 9 Parts replacement Parts replacement Test programs Special functions can be triggered on the appliances by activating various test programs. The tasks listed below in this section may be carried out These programs are given in detail in the Table 8.5. only by a ompetent person approved at the time by the •...
Parts replacement 9 Replacing burner Danger! Before replacing the component, comply with the safety instructions in Section 9.1. • Dismantle the burner module as described in Section 7.2.1. Fig. 9.1 Replacing burner • Loosen the 4 screws (1) on burner, and remove the burner. •...
9 Parts replacement Replacing expansion vessel Replacing primary heat exchanger Danger! Danger! Before replacing the component, comply with Before replacing the component, comply with the safety instructions in Section 9.1. the safety instructions in Section 9.1. • Disconnect the appliance from the mains as described •...
Parts replacement 9 Replacing electronics and display Danger! Before replacing the component, comply with the safety instructions in Section 9.1. • Comply with the assembly and installation manuals provided with the spare parts. Replacing display or electronics If you are replacing only one of the two components, the parameter adjustment functions automatically.
10 Recycling and disposal 11 Vaillant service 10 Recycling and disposal Both the Vaillant ecoTEC and the associated transport packaging consist primarily of recyclable raw materials. The Vaillant ecoTEC and all accessories and packaging must not be disposed of in the normal household rubbish.
0020008345-06 SERVICE INTERVAL RECORD It is recommended that your heating system is serviced regularly and that you complete the appropriate Service Interval Record Below . Service Provider. Before completing the appropriate Service Interval Record below, please ensure you have carried out the service as described in the boiler manufacturer’s instructions.