Ignition Pilot Adjustment; Combustion Head Adjustment - Riello RS 28/M Installation, Use And Maintenance Instructions

4.7

Ignition pilot adjustment

Place the pilot and electrode as shown in Fig. 11.
The pilot works correctly at pressures ranging from 5 - 12" WC.
IMPORTANT
To set pilot without main burner operation, use the function "Check
mode" of the control box (see page 32).
Measures must be respected.
WARNING
4.8

Combustion head adjustment

Installation operations are now at the stage where the blast tube
and sleeve are secured to the boiler as shown in Fig. 12, page 17.
There are two possible cases:
The MIN burner output is not in the values of Tab. J.
In diagram (Fig. 13, page 17), depending on the MAX output, find
the notch to use for adjusting the air and the gas, and then proceed
as follows:
Air adjustment
Turn screw 4)(Fig. 12, page 17 - A) until the notch identified is
aligned with the front surface 5)(Fig. 12, page 17 - A) of the flange.
Gas adjustment
Loosen screw 1)(Fig. 12, page 17 - B) and turn ring 2) until the
notch identified is aligned with index 3).
Tighten the screw 1) fully down.
20154169
Installation
Ignition pilot
Probe
Electrode
Example:
the burner RS 38/M varies its output between: MIN = 378.7 and
MAX = 1288 MBtu/hr.
The MIN output of 378.7 MBtu/hr is not found in the values of
tTab. J and therefore diagram (Fig. 13, page 17) is valid, from
which it results that for a MAX output of 1288 MBtu/hr the gas and
air adjustments are done on notch 3, as in Fig. 12, page 17 - A and
Fig. 12, page 17 - B.
In this case the pressure load loss of the combustion head is given
by column 1 on page 19.
NOTE:
Diagram (Fig. 13, page 17) shows the ideal settings for the ring
2)(Fig. 12, page 17 - B). If the gas supply pressure is too low to
reach the max output operation pressure indicated on
page 19, and if the ring 2)(Fig. 12, page 17 - B) is not fully open,
it can be opened wider by 1 or 2 notches. Continuing with the
previous example, page 19. indicates that for burner RS 38/M
with output of 1288 MBtu/hr a pressure of approximately 1.81"
WC is necessary at test point 6)(Fig. 12, page 17 - A). If this
pressure cannot be reached, open the ring 2)(Fig. 12, page 17
- B) to notch 4 or 5.
Make sure that the combustion characteristics are
satisfactory and free of pulsations.
WARNING
The MIN burner output is found in the values of Tab. J,
page 17.
16 GB
D2261
Fig. 11