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4.14.2 Gas pressure
The pressure at the head of the burner from refers
to zero in the combustion chamber; to obtain true
pressure, measured by a U-type manometer, add
WARNING
the counter-pressure of the boiler.
Gas pressure
Mbtu/hr (GCV)
11362
15850
20330
24805
13256
18340
23420
28500
The data of thermal output and combustion
head gas pressure are related to full open (90°)
gas butterfly valve.
WARNING
20142253
Installation
1 ∆p ("WC)
2 ∆p ("WC)
2,8
1
5,4
1,9
9,1
3,2
13,1
4,9
4,5
1,1
8,1
1,9
13,2
3,5
17,7
4,9
Tab. O
30
4.14.3 Pilot - gas train connection
The burner is fitted with a dedicated gas train that is fixed to the
pipe coupling.
Supply pressure: see gas train specification.
WARNING
4.14.4 Ignition pilot burner
For proper operation, adjust gas pressure (measured at pressure
test point 1)(Fig. 28) as follows:
Model
RLAS 650/EV
Natural gas
RLAS 800/EV
Natural gas
Check pilot flame stability before starting up the
main burner.
WARNING
In the case of ignition problems check:
correct positioning of the ignition electrode;
the gas pressure, according to indications.
+
20155059
FLOW
GB
Gas
"WC
16
16
1
SCFH
243
243
Tab. P
Fig. 28
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