Wood Fuel Requirements; Principles Of Pellet Combustion - Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual

General Information

Wood Fuel Requirements

The Vitoligno 300-C is only suitable for burning wood
pellet fuels listed below.
A prerequisite for approval is of a fuel by Viessmann is the
approval for the fuel by the responsible public authorities.
Warranty claims for Viessmann Biomass boilers are
excluded if the following fuel conditions are not met.

Principles of Pellet Combustion

What are wood pellets?
Wood pellets are made from 100 percent natural wood
remnants. This raw material is waste matter created by the
wood industry in large volumes through planing or sawing.
Wood remnants are compressed under high pressure and
formed into pellets, i.e. pressed into a cylindrical shape.
The raw material is stored and transported under completely
dry conditions. System users should also ensure completely
dry storage conditions. This is the only way to guarantee
optimum and effective combustion.
Requirement
Diameter
Length
Bulk density in delivered condition
Net calorific value in the delivered condition
Water content in delivered condition
Fines content in the delivered condition
Mechanical strength in the delivered condition
Ash content, free from water
Ash softening temperature
This value is only binding for pellets certified
to CANPlus.
It indicates the temperature at which the
wood ash is deformed and can therefore
cause fusions in the combustion chamber.
Chlorine content, free from water
Sulphur content, free from water
Nitrogen content, free from water
m-% = percentage by mass
Consequence of overstepping particle size:
- Increased maintenance because of a substantially higher risk of malfunction
- Shortened service life of the conveyor augers and drives
10
IMPORTANT
If different fuels are used, Viessmann will not assume
any liability for the functioning or service life of the boiler
plant. Refer to the "Warranty" section in the General
Terms and Conditions of Delivery.
- Burn wood pellets only
- Do not use chemicals or fluids to start fire.
- Do not burn garbage, gasoline, naphtha, engine oil, or
other inappropriate materials.
Pellet requirements
It is recommended that the pellets used comply with the
requirements of the Pellet Fuel Institute (PFI - Standard or
PFI - Premium) and/or CANPlus grade A1 and/or CAN/CSA
- ISO 17225 Part 2 Standard.
PFI - Standard
0.230 - 0.285 in.
(5.84 - 7.25 mm)
A maximum
of 1% may be
longer than
1.5 in. (38 mm)
lb/cuft 38-48
(kg/m³) (608-769)
MJ/kg --
kWh/kg --
m-% ≤ 10
m-% ≤ 1
m-% ≥ 95
%
°F --
(°C) --
m-% ≤ 300 ppm
m-% --
m-% --
Vitoligno 300-C Installation/Service
CANPlus-A1 Specification
ISO 17225-2
0.236 ± 0.039 in.
(6 ± 1 mm)
A maximum of 1% 0.125 to 1.575 in.
may be longer than (3.15 to 40 mm)
1.7 in. (40 mm), but
no longer than
1.77 in. (45 mm)
37-47
(600 to 750)
≥ 16.5
≥ 4.6
≥ 10
≤ 1
≤ 97.5
≤ 0.7
≤2200
(≤ 1200)
≤ 0.02
≤ 0.04
≤ 0.3
as per
CAN/CSA
Grade A1
D06
(BD600)
Q16.5
Q4.6
M10
F1.0
DU 97.5
A0.7
--
--
C10.2
S0.04
N0.03