Ariston 120P CA Notice D'installation Et D'entretien page 59

NOZZLES CHANGE
a) Loosen the main nozzle 10 (fig. 16) and replace it.
b) Replace the nozzle 3 (fig. 19) of the pilot as follows:
• completely loosen the fixing screw 2.
• completely loosen the fitting 4.
• replace the nozzle 3.
• re-mount carrying out the operations in reverse order.
GAS UNIT RE-MOUNTING
• Re-mount the unit by carrying out the operations indicated
in paragraph "GAS UNIT DISMANTLING", in reverse
order. Carry out the following checks before any other
operation:
• The gas valve thermostat probe must be fully inserted in
appropriate sheath and the probe locking spring must be
hooked to the same sheath.
The correct setting of the burner is the specific responsibility
of the installer.
• Check that, by removing and re-mounting the gas unit,
the components are correctly positioned.
3 - DIMENSIONS OF THE NOZZLES HOLES EXPRESSED IN MM
MODELS
M G
ETHANE AS
Butane
L G
IQUID AS
Propane
On the nozzles the above values are reported in cents of a millimetre.
4 - CALIBRATION CHECK ON THE GAS VALVE
N
OTE
For categor y appliances
II2H3+
,
prepared for G20 methane gas
functioning, calibration has already
been carried out in factor y; no
adjustment is therefore requested with
this gas.
For adaptation to functioning with
G30-G31 liquid gas, it will be sufficient
to replace the nozzles of the main
burner and of the pilot.
M
AIN BURNER NOZZLE
10 ( . 16)
FIG
150
120
1,85 - 3,00 1,95 - 3,00
1,62 1,75
G P
AS SUPPLY RESSURE
gas)
The pressure of the supply gas, measured at
P pressure inlet by means of manometer, must
be as reported in the table.
G20 Methane gas
G30 Butane
Liquid
Gas
G31 Propane
R
ESERVED FOR THE INSTALLER
18
3
4
P
200
2,15 - 3,40
1,90
(natural gas and liquid
G
AS SUPPLY
P
RESSURE
20 mbar
28 ÷ 30 mbar
37 mbar
19
2
ILOT BURNER NOZZLE
3 ( . 19)
FIG
120 - 150 - 200
0,37
0,24
20
P
EN
57