Vaillant ecoTEC VU 656/4 Installation And Maintenance Instructions Manual
Gas fired wall hung high efficiency boiler
Hide thumbs
Also See for ecoTEC VU 656/4:
- Operating manual (20 pages) ,
- Installation manual (64 pages)
Related Manuals for Vaillant ecoTEC VU 656/4
Summary of Contents for Vaillant ecoTEC VU 656/4
- Page 1 For the heating engineer Installation and maintenance instructions ecoTEC Gas fired wall hung high efficiency boiler VU 656/4...
-
Page 2: Table Of Contents
Installation and setting ..........Handing over the control to the owner ....30 3.1.2 Gas odour ..............Vaillant warranty............30 3.1.3 Changes to the surroundings of the boiler ..6 General requirements ..........6 Adapting the boiler to the heating system ... 31 Selection and setting of parameters .... -
Page 3: Notes On The Documentation 1
10.4 Replacing the heat exchanger ....... 52 10.5 Replacing electronics and display ......52 Danger! Danger of burning or scalding! Vaillant Service ..........52 Caution! Recycling and disposal ........52 Potentially dangerous situation for the product 12.1 Boiler ................52 and environment! 12.2... -
Page 4: Description Of The Boiler
2 Description of the boiler Description of the boiler Design Fig. 2.1 Functional components Legend: 13 Connection provision - expansion relief valve Connection for the flue pipe 14 Gas valve 2 Heat exchanger 15 Air separation system 3 Air intake pipe 16 Volume flow sensor 4 Compact thermal module with gas valve, fan,mixing tube, 17 Automatic air vent... -
Page 5: Type Summary
Caution! Intended use To tighten or loosen screw connections, only The Vaillant ecoTEC boiler has been constructed using use suitable open-ended spanners (do not use state-of-the-art technology in accordance with pipe spanners, extensions, etc.). -
Page 6: Changes To The Surroundings Of The Boiler
3 Safety instructions and regulations • Notify the gas supply company or National Grid Part 1 Fundamental and design Transco 0800 111999 by telephone from outside the considerations. building! Part 2 Selection of equipment. Part 3 Installation, commissioning and 3.1.3 Changes to the surroundings of the boiler maintenance. -
Page 7: Gas Supply
Flue pipe Danger! Vaillant appliances are only system-certified if genuine Vaillant flue pipes are used. Only use genuine 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. - Page 8 3 Safety instructions and regulations D, E Fig. 3.3 Termination of the flue pipe The flue assembly shall be so placed or shielded as to Note! prevent ignition or damage to any part of the building. In addition, the terminal should not be nearer than 300 mm to an opening in the building Minimum fabric formed for the purpose of...
-
Page 9: Air Supply
Safety instructions and regulations 3 Balcony/eaves Gutter Flue pipe must project Flue pipe beyond every overhang adequately fixed Fig. 3.4 Termination of flue pipe under balcony or eaves Air supply Detailed recommendations for air supply are given in BS 5440: Part 2. It is not necessary to have an air vent in the room or internal space in which the boiler is installed. -
Page 10: Assembly
The boiler must be operated independently of the Scope of delivery ambient air, particularly in hairdressing salons, The Vaillant ecoTEC is delivered pre-mounted in a carpenter‘s shops, or paint shops and cleaning package unit. companies. Otherwise, a separate installation room is... -
Page 11: Dimension Drawing And Connection Dimensions
Assembly 4 Dimension drawing and connection dimensions Ø 80/125 Ø 25, R1 Rp 1 Rp 1 R 3/4 Fig. 4.2 Connection dimensions in mm Legend: Flue gas connection, 80/125 mm 9 Flow line drainage opening diameter, dimension A (hanging bracket – centre of air/flue gas 10 Connection provision - filling (combined filling and emptying pipe) with 87°... -
Page 12: Required Minimum Gaps/Assembly Clearances
4 Assembly Required minimum gaps/assembly clearances Mounting the boiler For the installation/assembly of the boiler as well as for carrying out future maintenance tasks, you need the Danger! minimum gaps and assembly clearances given below: Danger of personal injury and damage to property from falling boiler! When assembling the boiler make sure that the fixing point has a sufficient load-bearing... -
Page 13: Removing/Attaching The Front Casing
Danger! Danger of injury to persons and/or material damage due to improper installation! The Vaillant ecoTEC boiler may only be installed by a recognised skilled trade company. who also assumes the responsibility for proper installing and initial start-up of the boiler. -
Page 14: Selection Of Low Loss Header
5 Installation Selection of the low loss header The low loss header uncouples the boiler from the heating system. A sufficiently large water volume is constantly supplied through the boiler via the low loss header in conjunction with the boiler pump. It acts as a neutral point in the system and has minimal hydraulic resistance, therefore the boiler pump does not affect the circuit pumps and vice-versa. -
Page 15: D Danger
It is essential that the boiler and the system have provision for water make up and expansion. For more detailed information on examples of systems and system equipment contact your Vaillant sales support point. Danger! Danger of personal injury and material damage! The following system diagrams are schematic representations. -
Page 16: Heating Mode
5 Installation Heating mode The low loss header ensures, in conjunction with the In case of only one heating circuit to be operated boiler circulation pump, that a sufficiently high minimum downstream of the low loss header, this one can directly quantity of water is always circulating through the be controlled by the ecoTEC. -
Page 17: Heating Mode And Charging Mode
Installation 5 Use the mounted ProE plug (1) to establish the electrical A direct heating circuit and one hot water cylinder connection for the cylinder charging pump. (including charging pump and non-return valve) can be The pink plug-in location X6 (1) on the PCB is reserved connected downstream of the low loss header to the for the cylinder primary pump. -
Page 18: Gas Connection
Ensure strainless assembly of the supply lines damage due to improper installation! to avoid leakages in the heating system! The Vaillant ecoTEC boiler may only be installed by a recognised skilled trade company The boiler is connected to the heating flow and return who also assumes the responsibility for proper via service valves. -
Page 19: Expansion Relief Valve (Safety Group), Heating Installation
Installation 5 Expansion relief valve (safety group), heating Condensate drain pipework installation Fig. 5.12 Condensate drain pipework Legend: a Internal stackpipe Fig. 5.11 Fitting the safety valve b Internal discharge system c Gully The ecoTEC is equipped ex factory with connections for d Soakaway a safety group: •... -
Page 20: Electrical Connection
5 Installation b) connecting into the internal discharge branch (e.g. Electrical connection sink waste) with an external termination, the condensate draining pipe should have a minimum Danger! diameter of 22 mm with no length restriction and Risk of fatal electric shock through contact should incorporate a siphon with a 75 mm (3) (built with live connections! into the boiler) seal. -
Page 21: Connecting Controllers
Installation 5 • Cover the supply line over a length of approximately 2 - 3 cm and insulate the cores. Caution! Supplying power to the wrong plug terminals of the Pro E system can destroy the electronics. Only connect a 230 Vac live supply to boiler terminal connections marked LNE. -
Page 22: Connecting A Low Loss Header Sensor
2 (see Chap. 9.1.2). VR40 - "2 in 7“ multifunction module If you wish to connect additional components this can be done using the Vaillant VR40 - "2 in 7" multifunction module. Note! Please observe the separate manual attached to the VR40 - "2 in 7"... -
Page 23: Connection Diagrams
Installation 5 5.8.5 Connection diagrams brown Cylinder thermostat (connection) black “C1-C2” black Cylinder orange NTC sensor violet black Water pressure sensor green green Signal Flow rate sensor black blue Earth black Hall signal grey PWM signal +24V natural Flow sensor black blue Return sensor... - Page 24 5 Installation 230V~ Additional relay (e.g. external heating pump) (adjustable in d.26, see table 9.3) Internal pump Cylinder primary pump Boiler enable connection (factory link fitted) 230 volt mains input pink Optional ext. controller/room thermostat 7-8-9 (continuous, analogue) Bus connection for optional accesories Safety circuit connection Earth Earth...
-
Page 25: Start-Up 6
Vaillant assumes no liability for this and such Note! consequential damages. Please ensure the When starting up particularly take the following operator is aware of frost protection methods. -
Page 26: Filling The Condensate Siphon
6 Start-up If the heating installation serves several floors, the Note! values for the water pressure in the system may need Use the test program P.0 to bleed the heating to be higher (to avoid the ingress of air). system: The boiler does not start up. The •... -
Page 27: Checking The Gas Setting
Start-up 6 Note! If the installation kit is not present, do not • Check the maximum gas flow rate as detailed in operate the boiler. Contact Vaillant customer section 6.3.2. service. • Check the gas inlet working pressure as detailed in section 6.3.3. -
Page 28: Checking The Gas Flow Rate
Table 6.1, do not operate room thermostat. the boiler and inform the Vaillant Service Solutions • With the boiler operating at full load check that the (0870 6060 777). -
Page 29: Checking The Appliance Function
(see Chap. 6.4.2) • Hand over the boiler to the user. The Vaillant ecoTEC displays status codes to indicate the operating condition of the boiler. You can perform a function check based on these status codes by pressing the "i"... -
Page 30: Cylinder Charging
Vaillant warranty Vaillant provide a full parts and labour warranty for this boiler. The boiler must be installed by a suitably heating engineer in accordance with the Gas Safety (Installation and Use) Regulations 1998, and the manufacturer’s... -
Page 31: Adapting The Boiler To The Heating System 7
Adapting the boiler to the heating system 7 Adapting the boiler to the heating Table 7.1 shows only those diagnosis points where modifications are possible. All the other diagnosis points system are only required for diagnostics and fault repair The ecoTEC boilers are equipped with a Digital (see Chap. - Page 32 7 Adapting the boiler to the heating system Factory Boiler-specific Display Meaning Adjustable parameters setting setting d. 0 Heating partial load 14 - 65 kW 46 kW d. 1 Overrun time of internal pump for 2 - 60 min 5 min heating mode d.
-
Page 33: Setting The Heating Partial Load
Adapting the boiler to the heating system 7 7.2.1 Setting the heating partial load The output of the boilers is set at 35 kW in the factory. You can specify a value that corresponds to the kW output of the boiler under diagnosis point "d. 0“. 7.2.2 Setting of pump overrun and pump operating mode The pump overrun time for the heating operation is set... -
Page 34: Determination Of Maintenance Interval/Maintenance Display
7 Adapting the boiler to the heating system Set maximum burner blocking time [min] (target) Flow [°C] 10,0 15,0 20,0 25,0 30,0 35,0 40,0 45,0 50,0 55,0 60,0 14,0 18,5 23,0 27,5 32,0 36,5 41,0 45,0 50,0 54,5 12,5 16,5 20,5 25,0 29,0... -
Page 35: Inspection And Maintenance 8
To ensure the faultless operation, long term availability - The person carrying out a combustion measurement of all functions and long working life of your Vaillant must be assessed as competent in the use of a flue boiler and to prevent modifications to the approved gas analyser and the interpretation of the results. -
Page 36: Safety Instructions
8 Inspection and maintenance - The gas inlet working pressure at maximum rate as • Bleeding the heating installation (see section 6.2, described in section 6.3.3. Filling the system). - The gas flow rates as described in section 6.3.2. • Open the gas isolation valve. - Correctness of electrical, water and gas connections. -
Page 37: Adjusting The Co (Or The Air Ratio)
If the flue gas value needs to be adjusted, higher than allowed in Table 8.1, call the • unfasten the screw (Fig. 8.1, 2) and Vaillant Service Solutions. • fold the air intake pipe (Fig. 8.1, 3) forwards through • Do not start up the boiler! 90°. -
Page 38: Inspection And Maintenance Work Steps
8 Inspection and maintenance 8.1.5 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. -
Page 39: Filling/Draining The Boiler And Heating Installation
Inspection and maintenance 8 Filling/draining the boiler and heating installation 8.2.1 Filling the boiler and the heating installation A description of how to fill the boiler and heating installation is provided in Chap. 6.2. 8.2.2 Draining of the boiler • Close the service valves of the boiler. •... -
Page 40: Cleaning The Heat Exchanger
8 Inspection and maintenance Danger! 8.3.3 Checking the burner Danger of combustion and damage due to The burner is maintenance-free and needs no cleaning. escaping hot flue gases! • Check the surface of the burner for damage, replace The silicone seal and the silicate cord on the the burner if necessary. -
Page 41: Cleaning The Condensate Ducts And The Condensate Siphon
Inspection and maintenance 8 Fig. 8.6 Checking for gas tightness Caution! Open the gas feed and check the gas tightness of the boiler with leak detector spray. Check the screwed connection (1) particularly carefully. Cleaning the condensate ducts and the Fig. -
Page 42: Cleaning The Air Separation System
8 Inspection and maintenance After that, both can be cleaned in the dismounted state. Cleaning the air separation system Take note also of the accompanying installation manual for the siphon cartridge. Danger! Danger of burning or scalding! All water-carrying components present a danger of injury and scalding. -
Page 43: Checking The Charge Pressure Of The External Expansion Vessel
Inspection and maintenance 8 Caution! • Check the appliance for gas and water leaks. All O-rings must be replaced with new ones as • Check the flue system for leaks and for proper otherwise leaks may occur! fixation. • Check over-ignition and that the flame on the burner •... -
Page 44: Troubleshooting
Whenever possible, please quote the fault code Heating mode pump pre-run displayed (F.xx) and the status of the boiler Heating mode ignition (S.xx) when contacting the Vaillant customer Heating mode burner on service or your Vaillant service partner. Heating mode pump/fan overrun... -
Page 45: Diagnosis Codes
Troubleshooting 9 9.1.2 Diagnosis codes In the diagnosis mode, you can change certain parameters or display more information. The diagnosis information is divided into two diagnosis levels. The 2 diagnosis level can be reached only after entering a password. Caution! The access to the 2 diagnosis level may only be used by a qualified heating engineer. - Page 46 °C d.44 digitalised ionisation voltage Display range 0 to 102, >80 no flame, <40 good flame display d.47 External temperature (with weather-controlled Vaillant Actual value in °C controller) d.76 Boiler variant (display): Device specific number (DSN) d.90 Digital regulator status 1 = detected, 0 = not detected (eBUS Address <=10)
- Page 47 Troubleshooting 9 Display Meaning Display value/adjustable value d.14 Pump speed target value Target value of internal pump in % Possible settings: 0 = auto (factory setting) 1 = 53 2 = 60 3 = 70 4 = 85 5 = 100 (factory setting) d.17 Heating flow/return regulation changeover 0 = flow, 1 = return (factory setting: 0)
-
Page 48: Fault Codes
9 Troubleshooting Display Meaning Display value/adjustable value d.81 Operating hours hot water generation in h d.82 Burner start-ups in heating mode Number/100 (3 equals 300) d.83 Burner start-ups in hot water mode Number/100 (3 equals 300) d.84 Maintenance indicator: Number of hours until the next Setting range: 0 to 3000h and "-“... - Page 49 Troubleshooting 9 Code Meaning Cause F. 0 Interruption, flow temperature sensor NTC plug not plugged in or has come loose, multiple plug on electronics not plugged in correctly, interruption in cable harness, NTC defective F. 1 Interruption, return temperature sensor NTC plug not plugged in or has come loose, multiple plug on electronics not plugged in correctly, interruption in cable harness, NTC defective...
-
Page 50: Test Programs
9 Troubleshooting Code Meaning Cause F.72 Flow and/or return temperature sensor fault Temperature difference between flow temperature sensor and return temperature sensor too great -> flow and/or return temperature sensor defective F.73 Error in water pressure sensor Interruption/short-circuit of water pressure sensor, interruption/ short-circuit to GND in supply line to water pressure sensor F.74 Water pressure sensor signal outside correct range... -
Page 51: Replacing Components 10
Replacing components 10 10 Replacing components 10.2 Replacing the burner The tasks listed below in this section may be carried out Danger! only by a heating engineer. Before replacing the component, observe the • Only use genuine spare parts for repairs. safety information in Chap. -
Page 52: Replacing The Heat Exchanger
Vaillant Service • Observe the installation manual that accompanies the spare part. If you have any questions, please contact Vaillant To ensure efficient and reliable operation of your boiler Service Solutions (see Chap. 11) it is recommended that regular servicing is carried out by your service provider. -
Page 53: Technical Data 13
Technical data 13 13 Technical data ecoTEC VU 656/4 unit Heat Output Range (heating 50/30 °C) 14,6 - 67,6 Heat Output Range (heating 80/60 °C) 13,8 - 63,7 Maximum Heat Input (Net) Net Efficiency at 100% load Net Efficiency at 30% load SEDBUK rating SAP seasonal Efficiency 90,5...