Page 2 - Contents; Checking the CO; Status codes
2 Installation and maintenance instructions ecoFIT pure 0020230531_07 Installation and maintenanceinstructions Contents 1 Safety .................................................................... 3 1.1 Intended use .......................................................... 3 1.2 Qualification .......
Page 5 - To prevent material damage:
0020230531_07 ecoFIT pure Installation and maintenance instructions 5 ▶ Observe local regulations on neutralisingcondensate. 1.3.9 Frost To prevent material damage: ▶ Do not install the product in rooms proneto frost. 1.3.10 Safety devices ▶ Install the necessary safety devices in theinstallation. 1...
Page 6 - Guarantee and Customer Service; Thank you for installing a new Vaillant appliance in your home.; Guarantee Registration; To register your Vaillant appliance visit:
6 Installation and maintenance instructions ecoFIT pure 0020230531_07 2 Guarantee and Customer Service Thank you for installing a new Vaillant appliance in your home. Vaillant appliances are manufactured to the very highest standard so we are pleased to offer our customers a comprehensive guarantee....
Page 7 - Technical data
0020230531_07 ecoFIT pure Installation and maintenance instructions 7 3 Technical data Technical data – General VUW 256/6-3 (H-GB) VUW 306/6-3 (H-GB) VUW 356/6-3 (H-GB) Gas category I 2H I 2H I 2H Diameter of the gas pipe 1/2 inch 1/2 inch 1/2 inch Diameter of the heating connec-tions 3/4 inch 3/4 i...
Page 9 - Notes on the documentation; These instructions apply only to:; Product article number; Article number; Product description; CE marking; Meaning
0020230531_07 ecoFIT pure Installation and maintenance instructions 9 4 Notes on the documentation ▶ Always observe all operating instructions enclosed withthe installation components. ▶ Store these instructions and all other applicable docu-ments for further use. These instructions apply only to: P...
Page 11 - Checking the scope of delivery; Check that the scope of delivery is complete and intact.; Number; Dimensions
0020230531_07 ecoFIT pure Installation and maintenance instructions 11 6 Set-up 6.1 Checking the scope of delivery ▶ Check that the scope of delivery is complete and intact. Number Designation 1 Heat generator 1 Unit mounting bracket 1 Flexible condensate discharge pipe 6 3/4" seals 4 1/2" s...
Page 12 - Minimum clearance; Compartment Ventilation; The boilers are very high efficiency appliances.; Regulation; Different flue outlet configurations can be carried out.; Explain these requirements to the user of the appliance.
12 Installation and maintenance instructions ecoFIT pure 0020230531_07 6.3 Installation site This boiler is not suitable for outdoor installation. This boilermay be installed in any room. However if the boiler is beinginstalled in a room containing a bath or shower it must onlybe installed in zones ...
Page 13 - Position of the air/flue terminal; Aa; Installation site
0020230531_07 ecoFIT pure Installation and maintenance instructions 13 6.6.2 Position of the air/flue terminal J J N Q S S P U B Boundar y G D J J R V M T G C W E F L A K S P S F X A Y Boundar y Z H Aa S Z Ba 6.6.2.1 Positioning the terminal of a fan-supported flue system Installation site Dimension...
Page 14 - a) at least 2 m from an opening in the building directly opposite, and
14 Installation and maintenance instructions ecoFIT pure 0020230531_07 Installation site Dimensions R The dimension below eaves, balconies and car ports can be reduced to this value, as long as the flue terminal isextended to clear any overhang. External flue joints must be sealed with suitable sili...
Page 15 - Flue Configuration Description; The guard should be similar to that shown in the figure.; Using the mounting template; Note; Check the load-bearing capacity of the wall.
0020230531_07 ecoFIT pure Installation and maintenance instructions 15 6.6.3 Flue Configuration Description 6.6.3.1 Horizontal Concentric Flue ⌀ 60/100 mm or ⌀ 80/125 mm (C13 type installation) 1 1 Gasket (fitted) Note If the terminal is at less than 1.80 m from theground, you must install a termina...
Page 16 - Removing; Refit the components in the reverse order.
16 Installation and maintenance instructions ecoFIT pure 0020230531_07 6.9 Removing/installing the front casing 6.9.1 Front casing, removing B C A 6.9.2 Installing the front casing ▶ Refit the components in the reverse order. 6.10 Removing/installing the side section 6.10.1 Removing the side section...
Page 17 - Installation; Preparing for installation; Gas and water connections
0020230531_07 ecoFIT pure Installation and maintenance instructions 17 7 Installation 7.1 Preparing for installation ▶ Make sure that the existing gas meter is capable ofpassing the rate of gas supply required. ▶ Consider the maximum heat output given in DHW mode. ▶ Install a system separator (to be...
Page 18 - Connecting the condensate discharge pipe; Connect the condensate traps; Condensate discharge systems; Preferred option; stack; Best practice; waste
18 Installation and maintenance instructions ecoFIT pure 0020230531_07 7.6 Connecting the condensate discharge pipe 1 2 ▶ Follow the instructions listed here and observe the legaland local regulations on condensate discharge. ▶ Use PVC or any other material that is suitable for drain-ing the non-neu...
Page 19 - Susceptible to siphonage, must terminate in a gulley; pipe; NB only combined foul/rainwater drain
0020230531_07 ecoFIT pure Installation and maintenance instructions 19 Preferred option for external termination 7.6.1.5 External termination into soakaway < 500 mm 100 mm < 3 00 m m 50 25 25 < 2 5 25 Ø12 Ø32mm ≤ 3 m 1 23 4 56 1 Ground (either/or) 2 Seal 3 Plastic tube,100 mm diameter 4 Bot...
Page 20 - Electrical installation; The product must be earthed.; Switch off the power supply.; Opening the electronics box; If required, shorten the connection cables.
20 Installation and maintenance instructions ecoFIT pure 0020230531_07 7.7 Flue installation 7.7.1 Installing and connecting the air/flue pipe 1. You can find out which air/flue pipes may be used byconsulting the enclosed set-up instructions for theair/flue system. 2. Observe the information on posi...
Page 21 - Establishing the power supply; Connecting controls to the electronics
0020230531_07 ecoFIT pure Installation and maintenance instructions 21 9. Screw the respective plug to the connection cable. 10. Check whether all conductors are inserted mechanic- ally securely in the terminals of the plug. Remedy this ifnecessary. 11. Plug the plug into the associated PCB slot. – ...
Page 22 - Connect the control to the main plug.; Remove the bridge from the
22 Installation and maintenance instructions ecoFIT pure 0020230531_07 Condition : When connecting a control (230 V). ≤ 30 mm N L X1 230V~ RT ▶ Connect the control to the main plug. BUS RT B.of f Burner of f RT 24V = - + BUS ▶ Remove the bridge from the 24V=RT plug. 4. Close the electronics box.
Page 23 - Operation; Operating concept; Calling up the installer level; Code; Setting the hot water temperature; Using check programmes; Call up the installer level + 1 x
0020230531_07 ecoFIT pure Installation and maintenance instructions 23 8 Operation 8.1 Operating concept The operating concept and the display and setting facilitiesof the operator level are described in the operating instruc-tions. An overview of the display and setting options in the installerleve...
Page 25 - Filling the condensate trap; Switching on the product; Filling and purging the heating installation
0020230531_07 ecoFIT pure Installation and maintenance instructions 25 Additives for frost protection intended to remainpermanently in the installation – Adey MC ZERO – Fernox Antifreeze Alphi 11 – Sentinel X 500 ▶ If you have used the above-mentioned additives, informthe end user about the measures...
Page 26 - Filling the domestic hot water circuit; H gas in m
26 Installation and maintenance instructions ecoFIT pure 0020230531_07 1 1 1. Check the silicone hose connection (1) between the pump's automatic air vent and the hydraulic console. 2. Fill with water until the required filling pressure isreached. – Recommended filling pressure: 1 to 1.5 bar ◁ The h...
Page 27 - Permissible gas flow pressure for operation with; Do not start up the product.
0020230531_07 ecoFIT pure Installation and maintenance instructions 27 3. Undo the sealing screw on the test nipple (2) . 4. Connect a manometer to the test nipple (2) . 5. Open the gas stopcock (1) . 6. Start up the product with check programme P.01 (in- stallation with eBUS control). 7. In additio...
Page 28 - Checking leak-tightness; 0 Adapting the unit to the heating; Setting the burner anti-cycling time; time
28 Installation and maintenance instructions ecoFIT pure 0020230531_07 8. Install the front casing. ( → Page 16) 9.11 Checking leak-tightness ▶ Check the gas pipe, the heating circuit and the hot watercircuit for leak-tightness. ▶ Check that the air/flue pipe has been installed correctly. Condition ...
Page 29 - Setting the bypass valve; Regulate the pressure using the adjusting screw; Setting the domestic hot water temperature; Set the domestic hot water temperature.
0020230531_07 ecoFIT pure Installation and maintenance instructions 29 0 50 100 150 200 250 300 350 0 200 400 600 800 1000 1200 A B 1 2 A Remaining feed head[mbar] B Flow rate [l/h] 1 Max. PWM 2 Min. PWM 30c: 0 50 100 150 200 250 300 350 400 450 0 200 400 600 800 1000 1200 A B 1 2 A Remaining feed h...
Page 30 - Domestic hot water temperature:; 1 Handing over to the end user; Inform the end user how to handle the product.
30 Installation and maintenance instructions ecoFIT pure 0020230531_07 Condition : Water hardness: > 3.57 mol/m ³ – Domestic hot water temperature: ≤ 50 ℃ 3. Descale the water as required. 11 Handing over to the end user ▶ At the time of commissioning complete all relevant sec-tions of the Benchm...
Page 31 - 2 Inspection and maintenance
0020230531_07 ecoFIT pure Installation and maintenance instructions 31 12 Inspection and maintenance 12.1 Complete Service Interval Record section ▶ After servicing, complete the relevant Service IntervalRecord section of the Benchmark Checklist located onthe inside back pages of this document. 12.2...
Page 33 - Cleaning the condensate trap; Cleaning the strainer in the cold water inlet
0020230531_07 ecoFIT pure Installation and maintenance instructions 33 – Clearance for the ignition electrodes: 3.5 to 4.5 mm 6. Make sure that the seal (5) is free from damage. ▽ If necessary, replace the seal. 12.10 Cleaning the condensate trap C 2 3 1 A B 1. Unclip the lower section of the conden...
Page 34 - 3 Troubleshooting; fault codes
34 Installation and maintenance instructions ecoFIT pure 0020230531_07 12.14 Draining the product 1. Close the service valves of the product. 2. Start check programme P.05 . Overview of the check programmes ( → Page 23) 3. Open the drain valves. 12.15 Checking the pre-charge pressure of the expansio...
Page 35 - Replacing defective components
0020230531_07 ecoFIT pure Installation and maintenance instructions 35 13.5 Replacing defective components 13.5.1 Replacing the burner 1. Remove the gas-air mixture unit. ( → Page 31) 2. Remove the two burner seals. 3. Remove the burner . 4. Insert the new burner. 5. Insert two new burner seals in t...
Page 36 - Replacing the PCB for the user interface
36 Installation and maintenance instructions ecoFIT pure 0020230531_07 13.5.4 Replacing the pump head 1 2 1. Disconnect the pump cables from the electronics box. 2. Undo the four screws (1) . 3. Remove the pump head (2) . 4. Replace the O-ring. 5. Use four screws to secure the new pump head. 6. Conn...
Page 37 - 4 Decommissioning the product; Disposing of the packaging
0020230531_07 ecoFIT pure Installation and maintenance instructions 37 13.5.8 Replacing the expansion relief valve 1 2 1. Remove the clip (2) . 2. Remove the expansion relief valve. 3. Fit the new expansion relief valve with a new O-ring. 4. Reattach the clip (2) . 13.5.9 Replacing the volume flow s...
Page 38 - Inspection and maintenance work; Maintenance work
38 Installation and maintenance instructions ecoFIT pure 0020230531_07 AppendixA Inspection and maintenance work The table below lists the manufacturer requirements with respect to minimum inspection and maintenance intervals. If na-tional regulations and directives require shorter inspection and ma...
Page 39 - Overview of diagnostics codes
0020230531_07 ecoFIT pure Installation and maintenance instructions 39 # Maintenance work Interval 28 Checking the pre-charge pressure of the expansion vessel at regular intervals 34 29 Check the water flow rate (domestic hot water). Insufficient water flowrate → Check the incoming water supply. Inc...
Page 43 - Status code
0020230531_07 ecoFIT pure Installation and maintenance instructions 43 C Status codes – Overview Note Since the code table is used for various products, some codes may not be visible for the product in question. Status code Meaning Displays in heating mode S.0 Heating mode: No requirement S.01 Heati...
Page 44 - Overview of fault codes; Fault code
44 Installation and maintenance instructions ecoFIT pure 0020230531_07 Status code Meaning S.98 Automatic test programme: Return temperature sensor, heating demands blocked. S.99 Internal automatic test programmes S.108 Purging the combustion chamber, fan in operation S.109 Product's standby mode ac...
Page 46 - Wiring diagram: Combi boiler
46 Installation and maintenance instructions ecoFIT pure 0020230531_07 E Wiring diagram: Combi boiler X2 X14 X21 L N 19 10 20 2 6 3 11 13 14 18 7 17 8 X51 X51 X20 16 1 9 3 15 4 5 10 11 6 13 X51 X35 X20 X40 X51 X30 X2 X21 X41 X22 X14 L N – + 24V= RT BUS Burner off RT 230Vac X1 FUS X106 X32 X90 X12 X3...
Page 48 - Commissioning Checklist; Benchmark Commissioning &
48 Installation and maintenance instructions ecoFIT pure 0020230531_07 G Commissioning Checklist © Heating and Hotwater Industry Council (HHIC) www.centralheating.co.uk * All installations in England and Wales must be notified to Local Authority Building Control (LABC) either directly or through a C...
Page 50 - SERVICE & INTERIM BOILER WORK RECORD
50 Installation and maintenance instructions ecoFIT pure 0020230531_07 © Heating and Hotwater Industry Council (HHIC) www.centralheating.co.uk SERVICE & INTERIM BOILER WORK RECORD It is recommended that your boiler and heating system are regularly serviced and maintained, in line with manufactur...
Page 52 - Commissioning Flow Chart; YES
52 Installation and maintenance instructions ecoFIT pure 0020230531_07 H Commissioning Flow Chart PRIOR TO CO AND COMBUSTION RATIO CHECK The boiler manufacturer’s installation instructions should have been followed, gas type verified and gas supply pressure/rate checked as required prior to commissi...
Page 53 - Index
0020230531_07 ecoFIT pure Installation and maintenance instructions 53 Index A Air intake pipe, removing ..................................................... 31Air/flue pipe, horizontal wall duct ......................................... 15Air/flue pipe, installing ....................................
