8
7.1. REPLACEMENT OF BURNER INJECTOR.
The device is normally regulated and prepared to operate with G30+G31 gas at pressure of 28-30/37 mbar. A conversion kit
for G20 + G25 or G20 gas is included in this device.
a) Unscrew the two hexagonal screws and loosen the controls to remove the stainless steel front panel.
b) Displace the primary air regulating tube towards the ring of the burner.
c) Unscrew the injector counterclockwise, according to fig. 2
d) Replace the injector according to chart 3.
e) The injector diameter is indicated in hundreths of mm on the injector.
Figure 2
Figure 2
f)
IMPORTANT: IMMEDIATELY ATTACH THE PLATE WITH INFORMATION ON THE NEW GAS TYPE.
Replacement injectors are supplied together with the corresponding informative plates.
7.2. ADJUSTMENT OF PILOT BURNER TO NEW GAS TYPE.
a)
Loosen the lower nut of the pilot burner (with a fitting spanner of 11mm).
b)
Turn the internal screw with a flat tip screwdriver to the right (for a smaller flame) or to the left (for a bigger flame).
c)
Screw on the lower nut of the pilot burner.
7.3. PRIMARY AIR REGULATION.
7.3.1. BURNER
RING
Primary air is regulated by approaching or moving away the regulating tube. Proceed as follows:
a)
Loosen screw (fig. 2).
b)
Move the burner tube-like regulator with some gentle strokes until a stable flame is achieved according to the gas
type installed (fig. 2 and chart 5)
c)
Fix the primary air regulator with the screw.
Chart 5:
Opening Primary Air Regulation
BURNER
Opening D for
G 20 GAS
Opening D for
G 30 + G 31 GAS
(37 mbar)
Opening D for
G 31 (50 mbar)
GAS
Opening D for
G 30 (50 mbar)
GAS
BIG RING
Maximally Open
(approx. 24 mm)
Maximally Open
(approx. 24 mm)
9 mm
Maximally Open
(approx. 24 mm)
Primary air of the pilot burner is regulated by turning the intermediate part in such a way that more or less air flows through the
injector’s orifice. Regulation is obtained by turning in one way or the other.
Observe the flame. An excess of primary air produces a short flame that tends to come off the pilot burner. This could hinder
the ignition of the pilot injector.
The lack of primary air produces smooth and weak flames with yellow extremities due to an incomplete combustion.
PRIMARY AIR
REGULATION
PIECE (TUBE)
INJECTOR
Summary of Contents for HQ-04
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