Viessmann KOB Pyrotec KPT Series Technical Data Manual page 7

Pyrotec Technical Data
Wood Fuel Requirements
Maximum water content
The maximum allowable water content of the fuel for
Pyrotec systems is limited to 50%.
The water content impacts the maximum boiler output.
Non-wood fuels
Non-wood fuels even if consisting of biomass, such as
needles, foliage, grain, straw, fruit pits, etc, are unsuited
as fuel for boiler operation and may not be used.
Suitable fuel types for Pyrotec systems
- Bulk density S in kg/m³ [lb/ft
size C1, C7, P1, P2, P4 as per CAN/CSA-
B366.1-M91.
Note: Fuel for Pyrotec systems allow for a max. of 50%
water content (W).
Saw dust
Fuel code Bulk Density kg/m³ [lb/ft³]
a S130 [8.1]
b1 S200 [12.5]
c2 S250 [15.6]
Wood chips
Fuel code Bulk Density kg/m³ [lb/ft³]
b2 S200 [12.5]
c1 S250 [15.6]
d1 S300 [18.7]
d2 S300 [18.7]
e1 S350 [21.8]
e2 S350 [21.8]
f1 S400 [24.9]
Shavings and chips
Fuel code Bulk Density kg/m³ [lb/ft³]
g S130 [8.1]
h S200 [12.5]
i S250 [15.6]
Pellets and briquettes
Fuel code Bulk Density kg/m³ [lb/ft³]
j S350 [21.8]
k1 S650 [40.6]
k2 S650 [40.6]
Note: For size of wood chips, see page 6.
(continued)
3
], water content (W) in %,
Water content % Fuel Size
W10 to W20
W20 to W35
W35 to W50
Water content % Fuel Size
W20
W20 to W35
W20 to W35
W35 to W50
W20 to W35
W35 to W50
W35 to W50
Water content % Fuel Size
Less than W15
Less than W15
Less than W15
Water content % Fuel Size
Less than W15
Less than W10
Less than W10
Limitation super fines and dust [wood particles smaller
1
than / in. (1.0 mm)]
32
Max. 10.0% of the total mass; if fuel does not comply
with this limit the following process may occur:
- Temperature peaks
- Slag formation
- Even higher temperature
- This process leads to damage by overheating and can
affect refractory materials.
Elevated values are especially critical for remnant wood in
combination with elevated values of Chlorine and Sulphur.
Description
C1 Sawdust, untreated (planing shop)
C1 Sawdust, untreated (sawmill)
C1 Sawdust, untreated (sawmill)
Description
C7 Forest wood chips, soft, untreated
C7 Forest wood chips, soft, untreated
C7 Forest wood chips, soft/hard, untreated
C7 Forest wood chips, soft, untreated
C7 Forest wood chips, hard, untreated
C7 Forest wood chips, soft/hard, untreated
C7 Forest wood chips, hard, untreated
Description
Shavings & chips from wood remnants,
C7
dry, mixed
Shavings & chips from wood remnants,
C7
dry, mixed
Shavings & chips from wood remnants,
C7
dry, mixed
Description
Briquettes from wood remnants c in. (20
P4
mm) to max. 2 in. (60 mm)
P1 untreated up to e in. (10 mm)
untreated e in. to c in. (11 mm to 20 mm)
P2
General Information
7