VIESMANN Installation instructions for heating engineers Vitodens 300 Type WB3A, 49 and 66 kW Gas fired wall mounted condensing boiler natural gas and LPG version VITODENS 300 Dispose after installation 5862 570 GB 5/2004 Supplied By www.heating spares.co Tel. 0161 620 6677...
Safety instructions Please follow these safety instructions closely to prevent accidents and material losses. Safety instructions explained Before working on the equipment/ heating system, isolate the mains Important information electrical supply (e.g. by removing a This symbol warns against the separate mains fuse or by means of a risk of material losses and mains electrical isolator) and safe-...
Index Preparing for installation Product information ..................Preparations for boiler installation ............... Installation Installing the boiler and making all connections ........... & Wall mounting bracket installation ............& Hanging the boiler into the wall mounting bracket ........Heating water (primary) connection............. Flue gas connection..................
Product information Vitodens 300, Type WB3A Set up for operation with natural gas E or LPG P. The natural gas E version can be converted to natural gas LL using a conver- sion kit. The LPG P version can be converted to natural gas E or LL using a conversion kit.
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Preparations for boiler installation (cont.) C DHW cylinder flow G1½" G Expansion vessel D Gas connection H Cable arrangement area E DHW cylinder return G1½" K Recommended dimension F Heating return G1½" L Condensate drain 1. Prepare the water connections. 3.
Installing the boiler and making all connections Wall mounting bracket installation Note The enclosed screws and rawl plugs are only suitable for concrete. For other construction materials, use fixings which are suitable for 110 kg loads. A Reference point: boiler top edge C Top edge finished floor B Boiler installation template D Recommendation...
Installing the boiler and making all connections (cont.) Hanging the boiler into the wall mounting bracket Supplied By www.heating spares.co Tel. 0161 620 6677...
Heating water (primary) connection Connect the boiler to the on-site pipe- work. A Heating flow B DHW flow C Gas connection D DHW return E Heating return F Expansion vessel Flue gas connection Connect the balanced flue pipe. Flue gas system installation instructions Condensate connection Connect the condensate drain with a...
Gas connection Information regarding operation with LPG We recommend the installation of an external safety solenoid valve when installing the boiler in rooms below ground level. 1. Carry out a leak test. Important information Excessive test pressure leads to damage to the boi- A Gas connection ler and gas train.
Electrical connections Notes regarding the connection of accessories For details of accessories, also observe the separate installation instruc- tions provided. A Radio clock connection B Heating circuit pump or boiler cir- cuit pump Supplied By www.heating spares.co Tel. 0161 620 6677...
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Electrical connections (cont.) C Vitotrol 100 UTD (only for control units operating with a constant temperature) D Vitotrol 100 UTA (only for control units operating with a constant temperature) Plug 230 V~ Low voltage plug fÖ Power supply Outside temperature sensor &...
Electrical connections (cont.) Routing connecting cables Important information Connecting cables are damaged if they touch hot components. When routing and securing connecting cables on site, ensure that the maximum permissible cable temperatures are not exceeded. A Low voltage connections D Main PCB B 230 V connections E Communications module C Internal extension...
Front panel installation Commissioning and adjustments For commissioning and adjustment, see service instructions. Supplied By www.heating spares.co Tel. 0161 620 6677...