Viessmann KOB PYROTEC, Technical Manual

Page: 9 / 88

Trade name PYROTEC grate combustion
Rated output 390 530 720 950 1250
Part no.: 7423 674 7423 675 7423 676 7423 677 7423 678
Flue gas
*4
Average temperature (gross
*5
)
Mean flue gas temperature with Q
N
*6 °C 160 160 160 160 160
Mean flue gas temperature with Q
min
°C 120 120 120 120 120
Mass flow rate
Q
N
; W5; O
2
8 % g/s 219 297 404 532 700
Q
W35
; W45; O
2
10 % g/s 303 412 560 736 968
Flow rate
Q
N
; W5; O
2
8 %; 150 °C
m
3
/s
0.26 0.36 0.48 0.63 0.83
Q
W35
; W45; O
2
10 %; 150 °C
m
3
/s
0.37 0.50 0.67 0.88 1.15
CO
2
content in the flue gas % 14.7 14.7 14.7 14.7 14.7
Flue outlet
7
mm 350 350 350 400 450
Required draught (at full load) Pa 0 0 0 0 0
Efficiency
At full load
*7 % 91 91 91 91 91
At partial load % 90 90 90 90 90
*4 Values for calculating the size of the flue system to DIN EN 13384, based on 12.0% CO
2
.
*5 Actual flue gas temperature as average gross value as per EN 304 at 20 °C combustion air temperature.
*6 Flue gas temperature: Reduction possible by inserting displacer rods (Q
N
-20 °C; Q
min
- 10 °C).
*7 For dry fuels (W5-W20) without recirculation, lower.
For PYROTEC 720–1250 without displacer rods, lower.
PYROTEC
(cont.)
PYROTEC
9
5822 511 GB
2