Baxi Eco Compact, Инструкции по эксплуатации и монтажу

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7110102.03 (1-06/13) 34
INST
ALLER Section
(en)
12. GAS VALVE
12.1 GASCONVERSION
The Technical Assistance Service can convert this boiler to natural gas (G20) or LPG (G31). Carry out the following operations:
A) replace the main burner injectors;
B) parameterise the electronic board;
C) mechanically calibrate the gas valve pressure regulator;
D) electronically calibrate the gas valve;
E)
final checks.
A) Replace the main burner injectors
•
Disconnect the boiler from the power supply;
• remove the front panel of the boiler;
•
remove the screws
(a) connecting the injector ramp to
the gas valve and burner;
• remove the injector ramp and the burner shield at the
same time (b) ;
• replace the ramp injectors making sure to fully tighten
them to prevent gas leaks. Injector diameters are
specified in the burner injector-pressure table.
• correctly reposition the injector ramp and the burner
shield (b) ;
•
secure the screws connecting the injector ramp to
the burner and gas valve. Make sure the o-ring (c)
between the gas valve and the injector ramp is correctly
positioned;
• check the gas circuit for leaks.
B) Parameterise the electronic board
•
Power the boiler;
• set the (Fxx)
parameters with the values indicated in the following table, depending on the gas type following the procedure
described in the SETTING PARAMETERS section.
G20 G31
F02 0 1
F08 100
F09 100
F18 18
F45 1
F48 100
F64 1
C) Mechanically calibrate the gas valve pressure regulator
•
Connect the positive pressure test point of a pressure gauge, possibly water-operated, to the
gas valve pressure test point ( Pb );
•
open the gas tap and switch the boiler to the "Winter" mode;
•
open a hot water tap that can provide a flow rate of at least 10 litres a minute or make sure
there is maximum heat demand;
C1) Adjust to nominal heat output:
• remove the modulator cover;
•
adjust the tube brass screw (
a
) until the pressure values shown in the burner injector-pressure
table correspond to the nominal heat output;
• make sure that the dynamic inlet pressure of the boiler, measured at the gas valve pressure
test point ( Pa ) is correct, as indicated in the TECHNICAL SPECIFICATIONS section.
C2) Adjust to reduced heat output:
•
disconnect the modulator power cable and adjust the screw (
b ) until the pressure values
corresponding to the reduced power indicated in the burner injector-pressure chart are
obtained;
•
reconnect the wire;
• mount the modulator cover and seal.
a
b
c
CG_2451
(b)
(a)