Table of Contents
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Technical Data Manual
for use by engineers and heating contractors
Pyrotec
r
Wood-fired Boiler
KPT 390 to KPT 1250 Series
Product may not be exactly as shown
Pyrotec 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.
Max. output: 390 to 1250 kW (1331 to 4266 MBH)
Min. output: 98 to 370 kW (334 to 1263 MBH)
5443 113 v1.9 05/2013
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Table of Contents
Related Manuals for Viessmann KOB Pyrotec KPT Series
Summary of Contents for Viessmann KOB Pyrotec KPT Series
- Page 1 Technical Data Manual for use by engineers and heating contractors Pyrotec Wood-fired Boiler KPT 390 to KPT 1250 Series Product may not be exactly as shown Pyrotec 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.
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Page 2: Product Information
Solid Fuel Fired Central Heating Appliances Under certain conditions, open loop systems may also be CSA C.22.2#3-M88 (R2004) considered. Contact Viessmann for details. Electrical Features of Fuel Burning Equipment Specifications UL2523 Fully-automatic underfeed combustion wood-fired... -
Page 3: Boiler Description
General Information Pyrotec Technical Data Boiler Description Description Supplied with: The PYROTEC Grate Firing System (patent no: EP 0 905 - Boiler with fire box and pressure vessel / tube heat 442 B1) was developed for automatic combustion of all dry exchanger including supply and return temperature to moist wood fuels (remnant wood, pellets and forest wood sensors and over pressure monitor... -
Page 4: Transport And Installation
General Information Pyrotec Technical Data Transport and Installation IMPORTANT Precautions must be taken to avoid accidents and injury during the transportation of the boiler. Only hoist the boiler when it is entirely empty of water, fuel and ash. Lifting The fire box has four lifting lugs that must be screwed in before lifting. -
Page 5: Delivery Condition
General Information Pyrotec Technical Data Delivery Condition Standard delivery condition Components that are not attached or installed to the The standard delivery condition of the Pyrotec boiler boiler at time of delivery (scope of the contractor): includes pre-assembled components as well as components that need to be assembled by the contractor - The pressure vessel is not mounted to the fire box in the field. -
Page 6: Wood Fuel Requirements
The Pyrotec is only suitable for burning fuels listed in this IMPORTANT section. A prerequisite for approval is of a fuel by Viessmann is the approval for the fuel by the responsible If different fuels are used, Viessmann will not assume any public authorities. - Page 7 General Information Pyrotec Technical Data Wood Fuel Requirements (continued) Maximum water content Limitation super fines and dust [wood particles smaller than in. (1.0 mm)] The maximum allowable water content of the fuel for Pyrotec systems is limited to 50%. Max. 10.0% of the total mass; if fuel does not comply The water content impacts the maximum boiler output.
- Page 8 General Information Pyrotec 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 lb/kg of dry fuel) of contained non-combustible substances apply [ash analyzed at a temperature of 1500°...
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Page 9: Venting Requirements
Safety Pyrotec Technical Data Power Failure Provision Power Failure Provision Customers must ensure that there is a supply of water independent of the electrical supply. This design ensures that in case of a power failure, the boiler will be reliably cooled by the thermal run-off safety valve. -
Page 10: Mechanical Room
The load-bearing capacity of the floor in Viessmann recommends the installation of an additional the area of the boiler bearing surface must be 512 lb/ft² electrical disconnect switch and a fuel shut-off valve (if (2500 kg/m²). -
Page 11: Combustion Air Supply
Safety Pyrotec 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 In the absence of local codes, use: appliance, the space shall: CSA B365-01, Installation Code for Solid Fuel Burning... -
Page 12: Technical Data
Mechanical Pyrotec Technical Data Technical Data Boiler model KPT- 1250 Maximum output MBH (kW) 1331 (390) 1808 (530) 2457 (720) 3242 (950) 4265 (1250) Minimum output MBH (kW) 334 (98) 450 (132) 614 (180) 812 (238) 1065 (312) Efficiency Fuel Moisture content W 50 Size of wood chips G 30 / G 50 as per CAN/CSA-B366. - Page 13 Mechanical Pyrotec Technical Data Specifications Boiler Dimensions BR Boiler Return BS Boiler Supply Dimensions Boiler Model KPT- 1250 in. (mm) 5 / 8 (2378) 7 / 8 (2536) 5 / 8 (2834) ½ (3035) 1 / 8 (3230) in. (mm) 5 / 8 (2328) 7 / 8...
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Page 14: Boiler Dimensions
Mechanical Pyrotec Technical Data Boiler Dimensions (continued) Legend A Boiler return B Motor for de-ashing system (optional) E Secondary air blower C Primary air blower 1 F In-feed auger D Boiler supply Dimensions Boiler Model KPT- 1250 in. (mm) 3 / 16 (3282) 149 (3782) 5 / 8... - Page 15 Mechanical Pyrotec Technical Data Automatic De-ashing System Preparation System for De-ashing Function of the control system: A light barrier monitors the level of the ash level in the The trough for later incorporation of the de-ashing auger troughtrough. When the level is exceeded, a certain is covered by refractory bricks.
- Page 16 Mechanical Pyrotec Technical Data Flue Gas De-duster The flue gas de-duster minimizes dust emissions and is Supplied with: designed as a multi cyclone with axial function. The de- - 1 flue gas de-duster duster is fully insulated and has three covers for cleaning. - 1 ash container 63 USG (240L) or 211 USG (800L) The crude gas chamber is cleaned via the side cleaning cover.
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Page 17: Safety Devices
Mechanical Pyrotec Technical Data Safety Devices The boiler system with return 3-way valve Legend To reliably prevent boiler corrosion through condensation A Nipple, c in. x 1b in. of the flue gases, the boiler return flow temperature must never be below 149° F (65° C). B Reducing coupling, c in. -
Page 18: Piping And Installation Of Safety Devices
Mechanical Pyrotec 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 for Pyrotec 720, 950 Valve adjustment must be facing forward... - Page 19 - DCW Cold water inlet, min. 36 psi (2.5 bar), max. below 150° F (65° C). 51 psi (3.5 bar) A Viessmann sized boiler pump with a boiler mixing - AV Air separator / vent valve are provided according to the tables below.
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Page 20: Fire Protection
UPS 80-160 F 60 Hz 3 x 208-230 V 1250 TP 100-80/4 60 Hz 3 x 208-230 / 460 V Viessmann ASME recommended tank sizes (U-stamped) Mixing valve Boiler model KPT- Nominal Valve Boiler model KPT- Tank size pipe size 3 in. - 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 Pyrotec 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 Pyrotec Technical Data Vitocontrol Mounting of the control panel Safety functions for: - Excess temperature, burn-back, opening of the fire box The control panel should be in an area where the heat door, opening of a lid in the loading system, excess radiation (front side of boiler, rear side of boiler with flue gas pressure in the fire box de-duster and flue gas blower as well as recirculation line)
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Page 24: Electrical Components
Electrical Pyrotec Technical Data Vitocontrol - Accessories Note: The control system components below are Operational Message reserved for the PYROTEC Single-unit System. Function: With the PYROTEC Double-unit System, these System status “Operating Load” indication; from functions are included in the PYROTEC Mastercontrol. operation of the boiler pump to higher-level control. - Page 25 Electrical Pyrotec Technical Data Electrical Components (continued) M High voltage B sensors N Sensors Y Low voltage S Switches High Voltage Number Designation Device tag Description -3M1 Exhaust blower (not shown) -9M11 Grate drive -13M13 Secondary air blower (not shown) -14M14 De-ashing auger -15M15...
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Page 26: Fuel Transport And Extraction Systems
Electrical Pyrotec Technical Data Fuel Transport and Extraction Systems Rotary Valve Number Designation Device tag Description -9 M9 Motor for rotary valve... - Page 27 Electrical Pyrotec Technical Data Fuel Transport and Extraction Systems In-feed auger Number Designation Device tag Description -4M2 Motor for in-feed auger -68S2 Limit switch for maintenance lid B31.1 -11B31.1 Light barrier metering container (Transmitter) B31.2 -11B31.2 Light barrier metering container (Receiver) M10.1 -8M10.1 Slide valve T30...
- Page 28 Electrical Pyrotec Technical Data Fuel Transport and Extraction Systems (continued) Pellet extraction auger Number Designation Device tag Description -12M32 Motor for pellet extraction auger S32.1 -12S32.1 Limit switch for maintenance lid S32.2 -12S32.2 Limit switch for silo door (not shown) Note: For details on designation see field wiring diagram.
- Page 29 Electrical Pyrotec Technical Data Fuel Transport and Extraction Systems (continued) Horizontal extraction system Number Designation Device tag Description -12M32 Motor for extraction auger -12M33 Motor for agitator -12B32 Light barrier for extraction auger S32.1 -12S32.1 Safety switch for maintenance lid S32.2 -12S32.2 Safety switch for silo door (not shown)
- Page 30 Electrical Pyrotec Technical Data Fuel Transport and Extraction Systems (continued) Walking floor auger Number Designation Device tag Description -4M2 Motor for walking floor auger -68S3 Safety switch for maintenance lid S3.1 -68S3.1 Safety switch for auger cover B3/1 -61B3/1 Light barrier walking floor auger (Transmitter) B3/2 -61B3/2 Light barrier walking floor auger (Receiver)
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Page 31: Hot Water Storage Tank
Electrical Pyrotec Technical Data Fuel Transport and Extraction Systems (continued) Silo Lid Number Designation Device tag Description Y6.3 -22Y6.3 Solenoid valve silo lid open Y6.4 -22Y6.4 Solenoid valve silo lid close S6.1 -22S6.1 Key operated switch for silo lid M901 -24M901 Vibration motor 1 M902... - Page 32 Pyrotec Technical Data Commissioning Fuel for the commissioning For the commissioning, sufficient dry fuel (max. W 20%) should be stored for approx. 10-24 full operating hours: PYROTEC approx. 5100 lb. PYROTEC approx. 6600 lb. PYROTEC approx. 8800 lb. PYROTEC approx. 11660 lb.