Viessmann Vitoflex 300-UF Technical Data Manual
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Technical Data Manual
for use by engineers and heating contractors
Vitoflex 300-UF
Wood-fired Boiler
Vitoflex 300-UF 390, 530, 720, 950 and 1250
Product may not be exactly as shown
Vitoflex 300-UF with an attached external grate and a
moving annealing grate to achieve optimal combustion
results.
A feed auger continuously moves the wood fuel onto
the burner trough where gasification takes place.
The combustible gases blend with precisely controlled
secondary air, resulting in a complete combustion and
the thermal energy is released into the boiler's triple-pass
heat exchanger.
Output range: UF 390, 334 to 1331 MBH (98 to 390 kW)
UF 530, 450 to 1808 MBH (132 to 530 kW)
UF 720, 614 to 2457 MBH (180 to 720 kW)
UF 950, 812 to 3242 MBH (238 to 950 kW)
UF 1250, 1065 to 4265 MBH (312 to 1250 kW)
5797 137 - 01 08/2017
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Table of Contents
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Summary of Contents for Viessmann Vitoflex 300-UF
- Page 1 Wood-fired Boiler Vitoflex 300-UF 390, 530, 720, 950 and 1250 Product may not be exactly as shown Vitoflex 300-UF with an attached external grate and a moving annealing grate to achieve optimal combustion results. A feed auger continuously moves the wood fuel onto the burner trough where gasification takes place.
- Page 2 Product Information Vitoflex 300-UF Technical Data Vitoflex 300-UF Steel wood-fired hot water heating boiler. For operation Codes primarily with modulating boiler water temperatures in CSA B366.1-M91 closed loop forced circulation hot water heating systems. Solid Fuel Fired Central Heating Appliances Under certain conditions, open loop systems may also be CSA C.22.2#3-M88 (R2004)
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Page 3: Boiler Description
The Vitoflex 300-UF Boiler Plant has been built to sensor, thermostatic valve for extinguishing assembly, ASME Sec. IV and has CRN for Canada. It is tested and extinguisher water container with mounting bracket approved to the applicable CSA / UL safety standards. -
Page 4: Transport And Installation
Lifting gear can be attached to these lifting lugs. The pressure vessel of the Vitoflex 300-UF has two lifting lugs to which lifting gear may be attached. A special crane (provided by the customer on site) is required to lift the fire box and the pressure vessel. -
Page 5: Delivery Condition
Components that are not attached or installed to the boiler at time of delivery (scope of the contractor): The standard delivery condition of the Vitoflex 300-UF boiler includes pre-assembled components as well as - The pressure vessel is not mounted to the combustion... -
Page 6: Wood Fuel Requirements
The Vitoflex 300-UF is only suitable for burning fuels IMPORTANT listed in this section. A prerequisite for approval is of a fuel by Viessmann is the approval for the fuel by the If different fuels are used, Viessmann will not assume any responsible public authorities. - Page 7 - Bulk density S in kg/m³ [lb/ft ], water content (W) in %, size C1, C7, P1, P2, P4 as per CAN/CSA- B366.1-M91. Note: Fuel for Vitoflex 300-UF systems allow for a max. of 50% water content (W). Saw dust Fuel code Bulk Density kg/m³...
- Page 8 General Information Vitoflex 300-UF Technical Data Wood Fuel Requirements (continued) Content limits for non-combustible substances - No wood fuels may contain any foreign bodies, such as pieces of metal, stones, masonry remnants or plastics. The following limits (per mg/kg of dry fuel) of contained non-combustible substances apply [ash analyzed at a temperature of 1500°F (815°C)]:...
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Page 9: Venting Requirements
Venting Requirements For installations in Canada: The Vitoflex 300-UF Grate Firing System is equipped with a flue gas exhaust blower. The boiler venting system must be tested and listed by a Nationally Recognized Testing Lab such as ULC/CSA This boiler must be properly vented. -
Page 10: Mechanical Room
A separate, dry heating room must always be provided for the Vitoflex 300-UF Grate Firing System. No combustible materials may be stored in the heating room. The heating boiler may only be set up on a fire- and temperature- resistant floor. -
Page 11: Combustion Air Supply
Safety Vitoflex 300-UF Technical Data Combustion Air Supply Codes Confined spaces Provision for combustion and ventilation air must be made When a furnace or boiler is enclosed in a space that has in accordance with applicable local codes. a volume less than 20% of that to be heated by the... -
Page 12: Technical Data
Mechanical Vitoflex 300-UF Technical Data Technical Data Boiler model UF 390 UF 530 UF 720 UF 950 UF 1250 Maximum output MBH (kW) 1331 (390) 1808 (530) 2457 (720) 3242 (950) 4265 (1250) Minimum output MBH (kW) 334 (98) 450 (132) - Page 13 Mechanical Vitoflex 300-UF Technical Data Specifications Boiler Dimensions BR Boiler Return BS Boiler Supply Dimensions Boiler Model UF 390 UF 530 UF 720 UF 950 UF 1250 in. (mm) (2378) (2536) (2834) (3035) (3230) ½ 5 / 8 7 / 8...
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Page 14: Boiler Dimensions
Mechanical Vitoflex 300-UF Technical Data Boiler Dimensions (continued) Legend A Boiler return E Secondary air blower B Motor for de-ashing assembly F In-feed auger with ash container (optional) C Primary air blower 1 D Boiler supply Dimensions Boiler Model UF 390... - Page 15 De-ashing into ash container, 211 USG (800 L) Supplied with: - Combustion chamber auger made of heat-resistant steel The Vitoflex 300-UF moving grate conveys the burnt- - Ascending conveyor auger with container station out ash into an ash trough which is recessed deep in the refractory floor.
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Page 16: Flue Gas Cyclone
Mechanical Vitoflex 300-UF Technical Data Flue Gas Cyclone The flue gas cyclone minimizes dust emissions and is Supplied with: designed as a multi cyclone with axial function. - 1 flue gas cyclone The de-duster is fully insulated and has three covers for - 1 ash container 63 USG (240 L) or 211 USG (800 L) cleaning. -
Page 17: Safety Devices
PRV connection must be capped on the UF 1250 - 60 psi boiler. All other models have only one PRV connection. 4 in. boiler flange for Vitoflex 300-UF 390-720, 6 in. boiler flange for Vitoflex 300-UF 950-1250... -
Page 18: Piping And Installation Of Safety Devices
Mechanical Vitoflex 300-UF Technical Data Piping and Installation of Safety Devices System fill Drain inspection port System fill Safety heat exchanger top view 3-Way mixing valve System return line Blocked 4 heat port exchanger Bypass line loops and 2 TS2430... - Page 19 The Vitoflex 300-UF 390 and Vitoflex 300-UF 530 have two safety heat exchanger loops and require one thermal safety flush valve. The Vitoflex 300-UF 720 to Vitoflex 300-UF 1250 have four safety heat exchanger loops and require two thermal safety flush valves.
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Page 20: Fire Protection
- Preventing overfilling of the combustion chamber equipped with a level monitoring system. A level monitor must be installed to prevent overfilling If there is a shortage of water, the Vitoflex 300-UF of the combustion chamber. The Vitoflex 300-UF Grate Firing System will switch off automatically. - Page 21 Fire protection for fuel storage space unit and the boiler. The rotary valve is suited to reduce pressure and at the same time is considered a suitable Viessmann does not provide fire protection for the fuel safeguard against back-burn. storage space.
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Page 22: Fire Extinguishing System
Mechanical Vitoflex 300-UF Technical Data Fire Extinguishing System The fire extinguishing system functions independent from Fire extinguishing system for the down pipe the electrical power and is flooding the material which is Note: The fire extinguishing system for the down pipe still remaining in the in-feed auger in case of back-burn. - Page 23 Electrical Vitoflex 300-UF Technical Data Ecocontrol Standard delivery Controller for the wood combustion system incl. activation Control panel, supplied separately of equipment for fuel charging according to the articles listed – Powder-coated surface separately; – Feed 3 × 208/3/60 Power supply The heating output is modulated to match the heat –...
- Page 24 Electrical Vitoflex 300-UF Technical Data Ecocontrol - Accessories Additional heat generator demand Function: With the “enable signal” (floating contact), an on-site peak load heat generator (oil or gas boiler) is activated when the supply temperature falls below a certain value.
- Page 25 Electrical Vitoflex 300-UF Technical Data Ecocontrol - Accessories for Output Management Thermal storage tank management, 5 sensors Modulating output operation of the Vitoflex 300-RF is optimized with the use of a thermal storage tank. Short term heat demand peaks are also covered. The temperature sensors record the heating of the thermal storage tank.
- Page 26 Electrical Vitoflex 300-UF Technical Data Ecocontrol - Accessories for Remote Transfer/Remote Monitoring Fault message device, analogue with battery Controller module For part no., see price list For the function extension of the Ecocontrol by up to 4 4 different voice messages are possible, as the fault functions message modem has 4 independent digital inputs.
- Page 27 Additional Information Vitoflex 300-UF Technical Data Boiler Components Legend 1 In-feed auger with isolating layer 7 Combustion chamber 2 Drive for moving grate 8 Combustion chamber door 3 Igniter 9 Pneumatic cleaning system (optional) 4 Controlled combustion air supply system...
- Page 28 Additional Information Vitoflex 300-UF Technical Data Fuel Transport and Extraction Systems Accessories Rotary Valve In-feed auger Pipe/trough conveyor auger...
- Page 29 Additional Information Vitoflex 300-UF Technical Data Fuel Transport and Extraction Systems Accessories (continued) Pellet extraction auger Spring extraction system Horizontal extraction system...
- Page 30 Additional Information Vitoflex 300-UF Technical Data Fuel Transport and Extraction Systems Accessories (continued) Walking floor auger Hydraulic unit...
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Page 31: Thermal Storage Tank
Such systems without oxygen diffusion barrier must have the tubing separated from the boiler with a heat exchanger. Viessmann always recommends the use of underfloor plastic tubing with an oxygen diffusion barrier. - Page 32 Vitoflex 300-UF Technical Data...