6
FIRING RATES (A)
1st stage DELIVERY
must be selected within
area A of the adjacent diagrams.
2nd stage DELIVERY
must be selected within
area B. This area provides the maximum delivery
of the burner in relation to the pressure in the
combustion chamber.
Important:
The FIRING RATE area values have
been obtained considering a surrounding tem-
perature of 20°C, and an atmospheric pressure
of 1000 mbar (approx. 100 m above sea level)
and with the combustion head adjusted as
shown on page 8.
BOILERS (B)
The burner/boiler matching does not pose any
problems if the boiler is CE type-approved and
its combustion chamber dimensions are similar
to those indicated in diagram (B).
If the burner must be combined with a boiler that
has not been CE type-approved and/or its com-
bustion chamber dimensions are clearly smaller
than those indicated in diagram (B), consult the
manufacturer.
TEST BOILER (B)
The firing rates were set in relation to special
test boilers, according to EN 267 regulations.
Figure (B) indicates the diameter and length of
the test combustion chamber.
Example:
RL 250 MZ
burner
Output 1770 kW:
diameter 80 cm - length 3 m.
(A)
Comb. chamber
-
m
(B)
D1637
D3944
0,25
kg/h
RL 250 MZ
m
ba
r
20
18
16
14
12
10
8
6
4
2
0
kW
3200
2800
2400
2000
1600
1200
800
400
- 2
200
0
A
B
