Westen Quasar E, Operating And Installation Instructions

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7113156.01 (1-05/13) 32
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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 parameters with the values indicated in the following table, depending on the gas type following the procedure described
in the SETTING PARAMETERS section.
Burner injector-pressure table
24 F 18 F
Gas type G20 G31 G20 G31
Injector diameter (mm) 1.35 0.85 1.18 0.77
Burner pressure (mbar*)
REDUCED HEAT OUTPUT
2.1 5.4 3.6 7.8
Burner pressure (mbar*)
RATED HEAT OUTPUT
11.8 28.8 11.6 24.7
N° injectors 11 11
* 1 mbar = 10.197 mm H
2
O
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.
D) Electronically calibrate the gas valve
D1) Electronically adjust to reduced heat output:
• set parameter F09 = 0 following the procedure described in the SETTING PARAMETERS section;
• 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;
• slowly increase (not more than 2 points at a time) the value of parameter F45 until the pressure read with the pressure gauge
increases; then reduce the value of F45 by 2 points and press to save.
D2) Electronically adjust to nominal heat output:
• set parameters
F09 = 100
,
F48 = 50
;