Pressure Regulation - Bosch 8 707 207 277 0 Instrucciones De Montaje

6720608089-0707 (Jumper2).fm Page 8 Monday, July 16, 2007 2:14 PM
Gas regulation
With the new electronics, some of the actions
described in the installation manual were
changed.
Below are described the new procedures.
Gas regulation
1
1.1 Factory regulations
Sealed parts must not be inter-
i
fered with.
Natural gas
Heaters designed for Natural gas H (G 20) are
factory sealed for delivery after the values on the
characteristics panel have been checked.
Heaters should not be ignited
i
when the coupling pressure is
less than 15 mbar more than 25
mbar.
Liquid gas
Propane/butane heaters (G31/G30) are factory
sealed for delivery after the values on the charac-
teristics panel have been checked.
Danger: The following opera-
tions must be carried out by a
qualified technician.
Power may be tuned according to the burner
pressure process, for which a manometer with U-
shaped connecting tubes is required.
1.2

Pressure regulation

Access to the adjuster screw
B Remove the appliance front cover.
8
B Press both tabs (A) simultaneously and pull
the control box.
Fig. 1 Remove the control box
B Once the control box is removed, place it as in
Fig. 2.
Fig. 2 Control box – gas adjustment position
Connection of manometer
B Loosen the shutter screw (1).
B Connect the U-tube manometer to the burner
pressure measuring point.
Fig. 3 Pressure measuring points
1 Burner pressure measuring point
6 720 608 089