20035606
8
GB
Technical description of the burner
3.6
Firing rate
MAXIMUM OUTPUT
must be selected in the hatched area of the
diagram (Fig. 3).
MINIMUM OUTPUT
must not be lower than the minimum limit
shown in the diagram:
RL 300/E = 2272 MBtu/h
3.6.1
Modulation ratio
The modulation ratio, determined using test boilers, is 4 : 1.
3.7
Test boiler
The firing rates were set in relation to special test boilers.
Fig. 4 indicates the diameter and length of the test combustion
chamber.
Example:
Output 18.500 MBtu/hr - diameter 39.4 inch - length 16.5 ft.
WARNING
The firing rate area values have been obtained con-
sidering a surrounding temperature of 68 °F, and an
atmospheric pressure of 394 “WC (approx. 329 ft
above sea level) and with the combustion head ad-
justed as shown on page 20.
Burner power output
Comb
ustio
n
cha
mber
pre
s
sur
e
D11235
Fig. 3
0
2
4
6
8
10
12
14
16
18
20
mb
ar
8
7
6
5
4
3
2
0
1
w.
c.
0 2000 4000 6000 8000 10000 12000 14000 16000
GPH
0 14.3 28,6 42,9 57,2 71,4 85,7 100 114,3
MBtu/hr
1 5 . 7
1 9 . 7
2 3 . 6
3 1 . 5
3 9 . 4
4 7 . 2
f t
i n c h es
ft= 0,12
MBtu/hr
18.9
11.3
7.5
1000
1.5
760
16.5
13.2
9.9
6.6
3.3
1.6
MBtu
hr
37870
23.0
29.6
22.7
D9396
Fig. 4
Summary of Contents for RL 300
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