Riello 20032946 - Firing Rates; Test Boiler; Commercial Boilers

11
20033283
GB
Technical description of the burner
4.7 Firing rates
The burners can work in two ways: one stage and two stage.
MAXIMUM OUTPUT must be selected in area A (and B for model
RLS 50). In order to utilize also area B (RLS 50) it is necessary
to perform the calibration of the combustion head as explained on
page 15.
MINIMUM OUTPUT must not be lower than the minimum limit
shown in the diagram:
4.8 Test boiler
The firing rates were set in relation to special test boilers, accord-
ing to EN 676 and EN 267 regulations.
Fig. 4 indicates the diameter and length of the test combustion
chamber.
Example:
output 350 Mcal/h (407 kW): diameter 50 cm - length 1,5 m.
4.8.1 Commercial boilers
The burner/boiler combination does not pose any problems if the
boiler is CE type-approved and its combustion chamber dimen-
sions are similar to those indicated in diagram (Fig. 4).
If the burner must be combined with a commercial boiler that has
not been CE type-approved and/or its combustion chamber di-
mensions are clearly smaller than those indicated in diagram
(Fig. 4), consult the manufacturer.
Model kW kg/h
RLS 28 100 8.5
RLS 38 116 9.8
RLS 50 145 12.3
WARNING
The firing rate value (Fig. 3) has been obtained
considering an ambient temperature of 20 °C, an
atmospheric pressure of 1013 mbar (approx. 0 m
above sea level), and with the combustion head
adjusted as shown on page 26.
Fig. 3
Pressure in combustion
chamber - mbar
Pressure in combustion
chamber - mbar
Pressure in combustion
chamber - mbar
RLS 28
RLS 38
RLS 50
D454
Fig. 4
Length of combustion
chamber - mbar