20037207
14
GB
Operation
6.5
Gas valve adjustment
The adjustment of the output of gas is achieved by using the
screw “V1”(Fig. 9).
–
To increase the output: turn the screw anticlockwise (un-
screw).
–
To reduce the output: turn the screw clockwise (tighten).
6.6
Burner adjustment
Check the output supplied, which must correspond with that re-
quested by the oven used.
To increase or reduce its value, intervene directly on the trimmer
on the fan control card kit supplied separately (Fig. 11).
Measure the gas delivery on the counter to precisely establish the
burnt output. Using a smoke analyser, measure the value of the
CO
2
or the O
2
in order to optimise the burner calibration.
The correct values for the gas G20 (natural gas) are:
CO
2
8.5 - 9% or O
2
5 - 5.5%.
To correct these values act on the gas valve in the following way:
to increase the gas delivery and the CO
2
:
turn the screw V1 anticlockwise (unscrew)
to reduce the gas delivery and the CO
2
:
turn the screw V1 clockwise (tighten).
The burner is supplied for operation with G20 (natural gas). For
conversion to G31 (LPG), use the special kit supplied.
Before carrying out the conversion:
–
Close the fuel interception tap.
–
Disassemble the gas valve 1)(Fig. 12) from the venturi unit
2), removing the screws 3).
–
Substitute the diaphragm 4) on the gas valve 1) with the one
supplied.
–
House the diaphragm 4) in the gasket 5).
The Tab. C shows the various diameters of the diaphragms
calibrated on the basis of the type of gas used.
Tab. C
–
Reassemble the gas valve and carry out all the adjustment
operations described above.
The correct values for the gas G31 (LPG) are:
CO
2
10 - 10.7% or O
2
5.7 - 6.2%.
To correct these values act on the gas valve in the following way:
to increase the gas delivery and the CO
2
: turn the screw V1
anticlockwise (unscrew)
to reduce the gas delivery and the CO
2
: turn the screw V1
clockwise (tighten).
The necessary values of the pressure on the gas mains are:
–
for G20 = 20 mbar
–
for G31 = 37 mbar
The Tab. D below gives the possible settings for a generator.
Tab. D
WARNING
Remove the electricity supply.
DIAMETER
DIAPHRAGM
Gas type
Diameter (mm)
G20
6
G31
3,5
D7627
1
2
3
5
4
Fig. 12
Output
(kW)
Gas type
Pressure P2
(mbar)
No. of turns per min.
(rpm)
CO
2
(%)
Trimmer position
28
G20
-0,1
5500
8 - 9%
10
Summary of Contents for RX28 S/PV H
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