Viessmann VITOFLEX 300-UF Technical Manual
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Viessmann VITOFLEX 300-UF Technical Manual

Solid fuel boiler 390 to 1250 kw
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Viesmann
VITOFLEX 300-UF
Solid fuel boiler 390 to 1250 kW
Technical guide
VITOFLEX 300-UF
Fully automatic solid fuel boiler with grate combustion
for the combustion of woodchips, wood pellets, shavings and
mixed wood
5682428 GB
5/2019

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Summary of Contents for Viessmann VITOFLEX 300-UF

  • Page 1 Viesmann VITOFLEX 300-UF Solid fuel boiler 390 to 1250 kW Technical guide VITOFLEX 300-UF Fully automatic solid fuel boiler with grate combustion for the combustion of woodchips, wood pellets, shavings and mixed wood 5682428 GB 5/2019...

  • Page 2: Table Of Contents

    ■ Update of the 1st BImSchV – Tightening of the emission limits ......■ Emission limits for dust and carbon monoxide (CO) according to 1st BImSchV, stage 2 (Article 5) ....................Vitoflex 300-UF 2. 1 Product description ....................■ Benefits at a glance ....................
  • Page 3 ■ Drive, push floor screw conveyor, high power ............■ Push floor screw conveyor cover ................Fuel transport 6. 1 Application options for transport systems by fuel ............. ■ Overview ....................... 6. 2 Fuel transport with screw conveyor ................Viesmann VITOFLEX 300-UF...
  • Page 4 9.12 Standard values for water quality ................■ Heating systems with rated operating temperatures up to 100 °C (VDI 2035) ..■ Filling the heating system ..................9.13 Frost protection ......................9.14 Connection on the flue gas side ................■ Chimney ........................ Viesmann VITOFLEX 300-UF...
  • Page 5 10. 1 General information on low pressure hot water boilers with safety temperatures of up to 110 °C ......................10. 2 Pipe connections ...................... 10. 3 Electrical installation ....................10. 4 Operating instructions ....................10. 5 Checks as part of the Building Regulations approval procedure ......Keyword index ............................Viesmann VITOFLEX 300-UF...

  • Page 6: Principles Of Wood Combustion

    The moisture content is crucial for controllability at partial load and the emissions performance of the system. Net calorific value of wood in relation to moisture content (M) Moisture level (u) in % Water content (w) in % A Softwood B Hardwood Viesmann VITOFLEX 300-UF...

  • Page 7: Determining The Amount Of Fuel Required

    The amount of fuel required can be calculated on the basis of the net calorific value and the required rated heating output. Significant influ- encing factors for this are the moisture content of the fuel and the efficiency of the system. x η Viesmann VITOFLEX 300-UF...

  • Page 8: Energy Density Of Various Fuel Types Compared With Fuel Oil (Standard Values)

    ≥ 4.6 Q4.6 Water content in the delivered condition ≤ 10 Fines content in the delivered condition ≤ 1 F1.0 Mechanical strength in the delivered condition ≥ 97.5 DU 97.5 Ash content, free from water ≤ 0.7 A0.7 Viesmann VITOFLEX 300-UF...

  • Page 9: Pellet Quality Characteristics

    ■ Max. length of 15 cm (1 % up to 45 mm) P31S that have the following properties: ■ Moisture content (see product description) ■ Max. coarse fraction of 6 % (> 45 mm) ■ Max. cross-section of 4 cm² Viesmann VITOFLEX 300-UF...

  • Page 10: Substances

    Update of the 1st BImSchV – Tightening of the emission limits The update of the 1st BImSchV, which contains the following essen- tial new points, came into force from 22 March 2010 onwards: Viesmann VITOFLEX 300-UF...

  • Page 11: Emission Limits For Dust And Carbon Monoxide (Co) According To 1St Bimschv, Stage 2 (Article 5)

    Viessmann engineer when measuring. Viessmann should be consul- dust emission limits demanded by the 1st BImSchV.

  • Page 12: Vitoflex 300-Uf 2. 1 Product Description

    M50). It combines the benefits of underfeed combustion with Use of the Vitoflex 300-UF as a base load boiler is practical for build- the advantages of grate combustion to optimum effect. The ing heat loads of 300 kW and above.
  • Page 13 Vitoflex 300-UF (cont.) ■ Sensors and switches installed on the feed screw conveyor: – Infrared light barrier for level monitoring of the barrier layer for the feed screw conveyor – Safety limit switch on inspection cover of feed screw conveyor –...

  • Page 14: Specification

    Vitoflex 300-UF (cont.) 2.2 Specification Specification Rated heating output 1250 Min. heat transfer Fuel efficiency 1033 1359 Performance data 1250 Rated heating output with standard fuel M45 Rated constant heating output with standard 1125 fuel M45 Minimum heating output Q...
  • Page 15 In chimneys with a draught (chimney draught) above 0.15 mbar, a secondary air device (draught limiter) must be installed. Lower for dry fuel (M5-M20) without recirculation. Lower for Vitoflex 300-UF, 720 to 1250 kW without displacer rods Viesmann VITOFLEX 300-UF...

  • Page 16: Dimensions

    Vitoflex 300-UF (cont.) Dimensions KR Boiler return KV Boiler flow Dimensions Rated heating output 1250 2378 2536 2834 3035 3230 2328 2486 2784 2981 3176 4370 4870 5257 5447 5992 2060 2560 2562 2562 3107 1200 1200 1200 1275 1275...
  • Page 17 Vitoflex 300-UF (cont.) Dimensions and overview of actuators and sensors A Sensor well for thermally activated safety valve (TAS) F Safety heat exchanger B Boiler return G Primary air fan 1 C Return temperature sensor H Boiler water temperature sensor...
  • Page 18 Vitoflex 300-UF (cont.) Overview KV Boiler flow L Boiler door KR Boiler return M Cleaning, pneumatic A Ash removal N Combustion chamber door B Cleaning cover, flue gas collector O Limit switch, combustion chamber door C Combustion chamber temperature sensor...

  • Page 19: Control Unit

    ■ In the control panel door – 4-pole mains isolator – Graphics-capable touchscreen – Control panel fan (incl. Pt1000 control panel sensor) – Documentation incl. fixed wiring diagram, terminal connection diagram, operating instructions, installation instructions in the guide folder Viesmann VITOFLEX 300-UF...

  • Page 20: Accessories For Ecocontrol

    ■ Hybrid motor starter for the drive motor integrated into the control ■ For the activation of a screw conveyor with external motor down- panel stream of the external discharge. ■ Input in control panel (safety limit switch on maintenance cover) Viesmann VITOFLEX 300-UF...

  • Page 21: Accessories For Ecocontrol Output Management

    ■ Receipt and processing of an external output restriction Processing of the 0-10 V output signals from Unit Firebed maintenance Output operation Note The boiler can only be shut down externally via "External demand ON/OFF"; this must be ordered separately. Viesmann VITOFLEX 300-UF...

  • Page 22: Accessories For Ecocontrol Remote Transfer/Remote Monitoring

    Note ■ Windows operating system, remote maintenance software (Team Option of additional fault message device, analogue with rechargea- Viewer) and visualisation/archiving software installed on the indus- ble battery pack – for part no., see pricelist. trial PC Viesmann VITOFLEX 300-UF...

  • Page 23: Accessories For Ecocontrol Function Extension

    For part no., see pricelist Note To connect the boiler control unit and controller module. The total length of all cables must not exceed 300 m. Standard delivery: ■ Prefabricated data cable CAN bus LiYCY 2 x 2 x 0.34 mm² Viesmann VITOFLEX 300-UF...

  • Page 24: Accessories For Function Extension Sensors

    Control unit (cont.) 3.6 Accessories for function extension sensors Temperature sensor for heating circuit For part no., see pricelist Standard delivery: For recording the flow temperature of a heating circuit. ■ Pt1000 contact temperature sensor Viesmann VITOFLEX 300-UF...

  • Page 25: Controller For Boiler Sequence Control/Charging Control Panel

    This buffer controller is used to control buffer management in twin The boiler systems each have their own fuel charging system (dis- boiler systems. charge and conveying equipment). The Ecocontrol regulates buffer management incl. boiler sequence control. Viesmann VITOFLEX 300-UF...

  • Page 26: Installation Accessories

    Sound level dB(A) ■ Compressor (rotation compressor) for municipal applications, incl. pressure regulator and pressure switch Specification Rated heating output 1250 Number of valves Size of valves 6/4” 6/4” 6/4” 6/4” 6/4” Viesmann VITOFLEX 300-UF...

  • Page 27: Feed Screw Conveyor, 2-Stage

    It is optimised for shavings/ the geared motor: 750/3000 rpm) woodchips (high level) on the one side and for wood pellets (low ■ Motor starter for geared motor level) on the other. ■ Software module in the controller Viesmann VITOFLEX 300-UF...

  • Page 28: Boiler Accessories For Safety Equipment

    For part no., see pricelist ■ Sensor well G 1/2 x 150 mm Standard delivery: ■ High limit safety cut-out ■ Safety pressure limiter (maximum pressure limiter 0 to 6 bar posi- tive pressure) ■ With valid component identification Viesmann VITOFLEX 300-UF...

  • Page 29: Heat Distribution Accessories

    ■ Cannot be ordered separately: Delivery only as part of a complete system ■ We reserve the right to select the pump manufacturers and types Pump selected according to: ■ Pump selected according to minimum requirements (see Specification page 14) ■ Requirements of the relevant application Viesmann VITOFLEX 300-UF...

  • Page 30: Accessories For Flue Gas Dust Extraction

    Ash container The ash container is equipped with rollers and connected to the dust extractor with quick-action fasteners. It can be pulled out for empty- ing. The fan can be installed either on the side or the top. Viesmann VITOFLEX 300-UF...
  • Page 31 ■ Either at the top or side E Lambda probe with transducer ■ Unused connection as cleaning cover, clean gas space F Flue gas temperature sensor B Cleaning cover (raw gas space) G Flue gas fan C Dust extractor (axial cyclone) Viesmann VITOFLEX 300-UF...
  • Page 32 1260 1260 1260 1020 1020 1330 1330 1462 1462 1657 Available ash containers, reserve For part no., see pricelist ■ Ash container 90 l, reserve ■ Ash container 240 l, reserve ■ Ash container 800 l, reserve Viesmann VITOFLEX 300-UF...

  • Page 33: Accessories For Flue Gas Routing

    ■ 250 mm diameter ■ 250 mm diameter ■ 300 mm diameter ■ 300 mm diameter ■ 350 mm diameter ■ 350 mm diameter ■ 400 mm diameter ■ 400 mm diameter ■ 450 mm diameter ■ 450 mm diameter Viesmann VITOFLEX 300-UF...

  • Page 34: Accessories For Sound Insulation Measures

    Available supports for: fore not within our area of responsibility. ■ Discharge screw conveyor ■ Screw conveyor Viesmann VITOFLEX 300-UF...

  • Page 35: Accessories For Ash Removal

    System variants for ash removal into ash container Docking point with mobile ash container can be installed at a 90° angle in each case. It is possible to select the direction in which the ash container is pulled out. Viesmann VITOFLEX 300-UF...

  • Page 36: Combustion Chamber Screw Conveyor Extension

    For part no., see pricelist 1793 1200 1299 1708 Ash removal into an ash container with a volume of 800 l Combustion chamber screw conveyor extension For part no., see pricelist Note Per metre Up to 2 extensions are permissible Viesmann VITOFLEX 300-UF...

  • Page 37: Extension For Steeply Inclined Screw Conveyor

    Installation accessories (cont.) Extension for steeply inclined screw conveyor For part no., see pricelist Note Per metre Up to 2 extensions are permissible Viesmann VITOFLEX 300-UF...

  • Page 38: Mobile Cleaning Equipment Accessories

    Weight Vacuum mm WC 1950 2100 3300 Air flow rate m³/h Filter surface area m² Sound level dB(A) Maximum total length of permanently installed Permanently installed pipework pipework for the flue gas extraction system is not permissible Viesmann VITOFLEX 300-UF...

  • Page 39: Ash Vacuum Cleaner Accessories

    ■ Spark arrestor [sieve] The cyclone cover is intended for the connection of the ash vacuum cleaner hoses to the ash container. It is equipped with a spark arrestor [sieve]. Ventilation air and extract air connections, DN 76 Viesmann VITOFLEX 300-UF...

  • Page 40: Burn-Back Protection Devices (Rse)

    In wood processing operations, 2 burn-back protection devices con- Drive: Spring return motor nected in series are required (e.g. 2 rotary lock valves or one rotary Fire safety: RSE to TRVB H-118 lock valve in combination with a shut-off gate valve). Viesmann VITOFLEX 300-UF...

  • Page 41: Drop Chute L = 1.0 M

    The existing on-site flange must be described (dimensions, hole pat- and an onward conveyor device by means of a special adaptor. tern) when ordering. Note The design (diameter, profile) of the special adaptor is matched to the relevant project at the factory. Viesmann VITOFLEX 300-UF...

  • Page 42: Fuel Discharge

    G 50 P16S P31S P45S Pellet extraction screw From conveyor p. 43 Horizontal discharge From p. 45 Funnel discharge From p. 52 Pushrod discharge From p. 54 With coarse fraction limitation (< 1 %) to 125 mm Viesmann VITOFLEX 300-UF...

  • Page 43: Fuel Extraction With Screw Conveyor

    Pellet discharge screw conveyor D = 120 mm < 9250 > 750 < 10,000 approx. 500 > 200 180 x 180 > 250 A Possible outlet in the fuel store B Drive, either on the left or right Viesmann VITOFLEX 300-UF...

  • Page 44: Pellet Discharge Screw Conveyor Drive

    ■ Discharge with inspection cover, safety limit switch and drop chute/ dust-proof chain guard. The geared motors are sized at the factory. adaptor for the following conveyor device Standard delivery: ■ Drive unit ■ Spur geared motor matched to boiler size and pump rate Viesmann VITOFLEX 300-UF...

  • Page 45: Fuel Discharge With Agitators

    Note The discharge screw conveyor must be ordered separately. Standard delivery: Speed/output of the drives: sizing by Viessmann ■ Horizontal discharge as per project drawing – Bottom agitator with two arms and external drive with shaft routed to inside –...
  • Page 46 Effective scope 0.8 to 0.95 x f Max. discharge screw conveyor length 10 m Note Sizing is influenced by several factors: ■ Fuel ■ Installation position ■ Compression, etc. Sizing is determined individually for each system by Viessmann. Viesmann VITOFLEX 300-UF...
  • Page 47 E Agitator axis Installation position, angled A Finished floor B Installation opening; seal with fire blocking/fire-retardant panel. C Height-adjustable base Max. angle of inclination a subject to fuel BD650 wood pellets 6° BD350 briquettes 8° BD350 woodchips 15° Viesmann VITOFLEX 300-UF...

  • Page 48: Discharge Screw Conveyor Ah To Horizontal Discharge Ah

    For part no., see pricelist For two-boiler discharge systems with a total system output of up to 1440 kW. Extension possible up to 10 m. Conveyor channel running through the entire system with specially adapted discharge screw conveyor. Viesmann VITOFLEX 300-UF...
  • Page 49 ■ Ensure there is enough space between the additional discharge Total price = total length h in m x unit price screw conveyor and the angular gear of the agitator, as well as between the profiled channels, to fit the support feet. Viesmann VITOFLEX 300-UF...

  • Page 50: Substructure Ah

    Fuel discharge (cont.) Substructure AH For part no., see pricelist Substructure for horizontal discharge, for installation in a fuel store with no concrete plinth Dimensions (340) 1200 Substructure AH installation position A Horizontal discharge AH B Substructure AH Viesmann VITOFLEX 300-UF...

  • Page 51: Protective Panel Ah For The Fuel Store Wall

    ■ Changeover from woodchips to pellets: install the cover panels above the discharge screw conveyor before filling the fuel store with wood pellets. Viesmann VITOFLEX 300-UF...

  • Page 52: Fuel Extraction With Funnel Discharge

    AP up to 7.5 m Discharge circle Up to 6.0 Up to 7.5 Funnel diameter 2205 2205/3005 Max. possible fill level 10.8 13.5 708/1030 For fuel store diameters > 6 m, the large funnel must be ordered. Viesmann VITOFLEX 300-UF...

  • Page 53: Additional Outlet Flange Ap

    For part no., see pricelist The standard delivery of the funnel discharge includes a funnel with a diameter of 2200 mm. For fuel store diameters > 6 m, the large funnel must be ordered for the funnel discharge. Viesmann VITOFLEX 300-UF...

  • Page 54: Fuel Extraction With Hydraulic Push Floor Discharge System

    Test pressure bar (MPa) 240 (24) 240 (24) Pressure force at 190 bar (19 MPa) FZD Pressure force at 190 bar (19 MPa) FZZ Length from centre of cylinder – piston boss Type K: 1080 Type L: 1230 Viesmann VITOFLEX 300-UF...

  • Page 55: Forces On The Building

    Applications of push floor discharge Slot discharge for pulling The drawing below is a schematic diagram. A project-specific draw- Note ing must be produced for construction design. Only original Viessmann weld bases are permitted for the pushrod drive. Viesmann VITOFLEX 300-UF...
  • Page 56 > 1500 > 1500 > 1750 > 2050 1230 (4000 - 10000) 50 - 150 A - A Note For a drive-over system, a minimum material cover of 40 cm is required. See chapter "Maximum dumping heights" Viesmann VITOFLEX 300-UF...

  • Page 57: Centre Discharge

    Hydraulic drive, ASH single Centre discharge The drawing below is a schematic diagram. A project-specific draw- Note ing must be produced for construction design. Only original Viessmann weld bases are permitted for the pushrod drive. Specification Centre discharge Screw conveyor...
  • Page 58 AS single pushrod drive with hydraulic cylinder type K Weld base, bunker Centre discharge cover (on site) Push floor screw conveyor Pushrod (incl. stop wedges) Version and drive, AQ standard Hydraulic compartment Hydraulic drive, ASH single Weld base, AS single Viesmann VITOFLEX 300-UF...

  • Page 59: Slot Discharge With Fill Function

    Slot discharge with fill function The drawing below is a schematic diagram. A project-specific draw- ing must be produced for construction design. Note Only original Viessmann weld bases are permitted for the pushrod drive. Specification Slot discharge with fill function...
  • Page 60 Fuel discharge (cont.) 1080 > 3000 A - A 50 - 150 < 8000 < 12000 (< 20000) 50 - 150 Viesmann VITOFLEX 300-UF...

  • Page 61: Hydraulic Assemblies For Moving Floor Discharge

    ■ Structural analysis and sizing of steel reinforcement on site Standard delivery: Note ■ 1 weld base per pushrod drive Only original Viessmann weld bases are permitted for the pushrod drive. Pushrod drive, twin For part no., see pricelist The two pushrod drives are located one above the other. They are The hydraulic cylinder moves the pushrod back and forth.

  • Page 62: Weld Base, Pushrod Drive, Twin

    ■ Structural analysis and sizing of steel reinforcement on site Standard delivery: Note ■ 1 weld base per pushrod drive Only original Viessmann weld bases are permitted for the pushrod drive. Bunker weld base (fuel store) For part no., see pricelist...

  • Page 63: Hydraulic Drive, As Twin

    For further transportation, the push Note floor screw conveyor is designed, depending on the transfer situa- Article price per m tion, as a sealed trough or a pipe. Values in brackets: option only in coordination with project management at the factory Viesmann VITOFLEX 300-UF...

  • Page 64: Push Floor Screw Conveyor, D = 250 Mm

    The cover is mounted on the front panel of the fuel store. It is Note opened via a hinge and serves as a touch guard for maintenance Article price per m personnel. Total price = fuel store width in m x article price Viesmann VITOFLEX 300-UF...

  • Page 65: Fuel Transport

    Pipe screw conveyors From p. 67 Pipe screw conveyor D = 120 mm Pipe screw conveyor D = 190 mm Pipe screw conveyor D = 250 mm With coarse fraction limitation (< 1 %) to 125 mm Viesmann VITOFLEX 300-UF...

  • Page 66: Fuel Transport With Screw Conveyor

    ■ Inlet with light barrier for monitoring the fill level (overfill protection) motor and a chain with a dust-proof chain guard. ■ Discharge with inspection cover, safety limit switch and drop chute/ adaptor for the following conveyor device Viesmann VITOFLEX 300-UF...

  • Page 67: Pipe Screw Conveyor

    150 x 150 220 x 220 280 x 280 Max. angle of inclination with pushing screw conveyor — 90° 90° Max. angle of inclination with pulling screw conveyor 50° 50° 50° 7 150 7 200 7 200 Viesmann VITOFLEX 300-UF...

  • Page 68: Pipe Screw Conveyor Drive, Pellets

    – Incl. drop chute/adaptor for the following conveyor devices guard. Trade name Pipe screw conveyor drive, pellets Max. screw conveyor diameter Screw conveyor torque approx. 800 Function Pulling Max. screw conveyor length Max boiler output 1250 Viesmann VITOFLEX 300-UF...

  • Page 69: Pipe Screw Conveyor Drive, Standard

    This drive is required for a direct transition (forced transfer). Trade name Pipe screw conveyor drive, high power Max. screw conveyor diameter Screw conveyor torque approx. 1100 approx. 1100 approx. 1100 Function Pulling/pushing Pushing Pulling Max. screw conveyor length Max. boiler output (woodchips) 1500 2500 2500 Viesmann VITOFLEX 300-UF...

  • Page 70: Fuel Storage 7. 1 Fuel Storage In On-Site Pellet Store

    Stored amount of energy = 19,500 kg x 5 kWh/kg = 97,500 kWh 45° A Fill connector D Sloping floor B Return air connector E Empty space C Air space F Viessmann discharge system G Available volume = ⅔ of the room Viesmann VITOFLEX 300-UF...

  • Page 71: Pellet Storage Room Design And Required System Components

    If the stored amount of pellets exceeds 6.5 t, surrounding walls stones, wood particles, etc.). and intermediate ceilings must comply with fire resistance cate- ■ The wall duct for the room discharge should be sealed from the gory F90. storage room side with fireproof material (e.g. rendered). Viesmann VITOFLEX 300-UF...

  • Page 72: Additional Safety Instructions For Pellet Stores

    0.5 m length on the other side to pro- trude into the storage room. This enables the pellets to reach the required filling velocity and therefore the required fill width. Viesmann VITOFLEX 300-UF...
  • Page 73 B Fire-resistant cladding F90 C Extension pipe D Pipe clip ~ 100 Connector spacing < 500 mm A Fill connector B Return air connector approx. 100 Alternating filling between connectors A Baffle mat B Fill and return air connectors Viesmann VITOFLEX 300-UF...
  • Page 74 B Wall duct Ø 150 mm Wall installation with screws The connector is secured to the outside wall with screws and earthed with a pipe clip. A Fill connector B Screws C Pipe clip for earthing D Wall duct Ø 110 mm Viesmann VITOFLEX 300-UF...

  • Page 75: Accessories For The On-Site Pellet Store

    Pieces of plaster/render or wall that have been knocked off can hin- der the pellet supply or block the ash removal from the boiler. Standard delivery ■ Baffle mat 1.42 x 1.25 m ■ Section anchor with carbine fastening Viesmann VITOFLEX 300-UF...
  • Page 76 ■ Sensor extension cable, 2500 mm long For part no., see pricelist Extension set Standard delivery: ■ Sensor unit ■ Fill connector with Storz coupling 4" ■ Sensor extension cable, 2500 mm long ■ Mounting flange 200 x 200 x 2 mm Viesmann VITOFLEX 300-UF...

  • Page 77: Filling The On-Site Fuel Store

    ■ Welded fall protection grille with 150 mm bar spacing A All-round seal required. Not included in the standard delivery. We recommend Kemperol Kombi roof seals. B Bar spacing, fall protection grille C 10 x secured with screws Viesmann VITOFLEX 300-UF...

  • Page 78: Fdh Hydraulic Bunker Cover

    The cover must not be opened in windy conditions (> 10 m/s). Standard delivery: ■ Steel supporting structure – Permissible load 250 kg/m – Sand-blasted – Primed with zinc dust and painted ■ Cover – Aluminium button plate surface – Welded watertight Viesmann VITOFLEX 300-UF...
  • Page 79 2800 External cover dimensions 3025 3025 3025 3025 4500 6000 7500 9000 2924 2924 2924 2924 Number of hydraulic cylinders Cover weights 1029 1231 1516 1823 Type 7.0/2.4 and 8.5/2.4 with covered expansion joint for thermal expansion Viesmann VITOFLEX 300-UF...

  • Page 80: Fall Protection Grille 120 For Fdh

    ■ Filling of the cover surface with a bitumen layer and asphalt or – Sand-blasted concrete, watertight design The max. permissible specific weight – Primed with zinc dust and painted of the filling is 2400 kg/m ■ Cover surface – For filling with asphalt or concrete by the customer Viesmann VITOFLEX 300-UF...
  • Page 81 A Filling on site (concrete or asphalt) E Filling level B Channel for rainwater F Fall protection grille (optional) C Rainwater drain (on site) G All-round seal required Not included in the standard delivery. D Fitting H Drain channel, running water (on site) Viesmann VITOFLEX 300-UF...

  • Page 82: Fall Protection Grille 120 For Fdb

    For part no., see pricelist Hydraulic unit used exclusively for a hydraulic bunker cover (FDH, FDB). The cover is opened by the hydraulic cylinder when the key switch is actuated. The load holding valve fixes the cover in position. Viesmann VITOFLEX 300-UF...

  • Page 83: Cover Drive For Hydraulic Unit

    The load holding valve fixes the cover in position. you observe the movement of the cover. Standard delivery: ■ One valve block per cover, each equipped with: – 2 solenoid valves – 1 load holding valve – 2 non-return throttle valves Viesmann VITOFLEX 300-UF...

  • Page 84: Heating Water Buffer Cylinder

    Viessmann experts undertake handling and siting on prepared foun- before lifting. Lifting gear can be attached to these lifting eyes. dations. The heat exchanger of the Vitoflex 300-UF has 2 lifting eyes to Recommended minimum clearances to walls for installation and which lifting gear can be attached.

  • Page 85: Boiler Room Requirements

    If in doubt, consult Viessmann on this matter. +40 °C (point of capture: Approx. 1 m from the boiler). The tempera- ture in the boiler room when operating the system must not fall below +10 °C (point of capture: Inside of exterior wall).

  • Page 86: Requirements Of The Muster-Feuerungsverordnung [M-Feuvo Sample Combustion Ordinance - Germany]

    Design information (cont.) < 400 Hatched area Floor of a heat-resistant design Grey central area Boiler supporting surface Foundation properties Trade name Vitoflex 300-UF Rated heating output 1250 1026 1026 1112 1360 1360 1826 1826 1912 2160 2160 4221 4721...

  • Page 87: Safety Precautions

    85 °C when the combustion equipment is delivering the rated heating output. Minimum clearances > a > 880 Viesmann VITOFLEX 300-UF...

  • Page 88: Water Connection

    Design information (cont.) Dimensions and clearances Trade name Vitoflex 300-UF Rated heating output 1250 1350 1850 1800 1600 2100 9.4 Water connection Heating connections Existing systems Connect all heat consumers and heating circuits to the boiler flow Before connecting the boiler to an existing heating system, flush the and boiler return connectors.
  • Page 89 Design information (cont.) Design recommendation for systems with sealed expansion, cylinder circuit if required Example Additional heat generator 1 heating water buffer cylinder as low loss header (5 sensors) Heat consumer distributor Viesmann VITOFLEX 300-UF...

  • Page 90: Sizing The Expansion Vessel

    M20 Boiler circuit pump Possible with large water volume in mains Y20 Boiler mixer TS131 KW Cold water supply min. 2.5 bar, max. 3.5 bar (2 pce from Vitoflex 300-UF, 720 kW) Design recommendation Trade name Vitoflex 300-UF Rated heating output...

  • Page 91: Electrical Installation

    Maximum pressure limiter Every heat generator with a rated heating output in excess of 300 kW must be equipped with a pressure limiter to prevent the pressure from exceeding the maximum set pressure (see EN 12828, Point 4.6.2.2.2). Viesmann VITOFLEX 300-UF...

  • Page 92: Safety Equipment To Protect Against Overfilling With Fuel And Burn-Back

    ■ Valve setting 50 - 90 °C 3 corresponds to approx. 80 °C ■ The lines must be secured in metal pipes (½"). A N25 fill level monitoring B 25 l extinguishing water container C Material supply D Water valve Viesmann VITOFLEX 300-UF...

  • Page 93: Preventing Overfilling With Fuel

    ■ Combination with the RSE (rotary lock valve or shut-off gate valve) Temperature and flame monitor (TÜF, FÜF) In accordance with TRVB H-118, the solid fuel boiler is monitored for falling below the temperature limit. If the initial burn does not develop, the system is stopped. Viesmann VITOFLEX 300-UF...

  • Page 94: Burn-Back Protection Device (Rse)

    Initial commissioning of a newly installed system may only be carried out by Viessmann or another heating contractor trained and author- ised by Viessmann. Prior to commissioning, the system must be fil- led with water, fuel must be provided for commissioning and the installation must be checked.

  • Page 95: Fuel For Commissioning

    Note from the refractory concrete during commissioning, we recommend For a list of permitted fuels for commissioning the Vitoflex 300-UF, using logs when heating the boiler system for the first time. The first see the chapter on "Fuels". Page 95.

  • Page 96: Filling The Heating System

    (flue gas tem- Flue gas temperatures below 90 ºC can occur in the lower output perature at rated load 160 - 200 °C). The Vitoflex 300-UF has out- range. Therefore, connect the boiler to a moisture-resistant chim- put-dependent control modulating between 25 - 100 % of the rated ney (thermal resistance class I according to DIN 18160 Part 1).

  • Page 97: Sound Insulation

    Depending on type, the ■ EN 483 boiler meets the following standards regarding the stated rated heat- ■ EN 677 ing output and technical requirements: See details on the type plate and in the enclosed documentation. Viesmann VITOFLEX 300-UF...

  • Page 98: Pipe Connections

    Building Regulations and any general inspectorate approvals and permits of the higher supervisory author- recognised technical rules to be observed. ity, in individual cases, are part of the Building Regulations require- ments. Viesmann VITOFLEX 300-UF...

  • Page 99: Keyword Index

    – Overview..................65 Control unit – Trough screw conveyor..............66 – Accessories............20, 21, 22, 23, 24 Funnel discharge AP................52 – Controller module................23 – Modbus TCP/IP................22 – Sensors..................24 – Standard delivery................19 Conveyor systems – Application options by fuel............42 Viesmann VITOFLEX 300-UF...
  • Page 100 – Hydraulic push floor discharge............54 – Specification..................54 Remote monitoring................22 Remote transfer................22 Rotary lock valve................94 Subject to technical modifications. Viessmann Werke GmbH & Co. KG Viessmann Limited D-35107 Allendorf Hortonwood 30, Telford Telephone: +49 6452 70-0 Shropshire, TF1 7YP, GB...

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Vitoflex 300-rf

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