Brasilia OPUS Technical Manual page 33

4.B. START UP - VERSION WITH GAS SYSTEM
GAS SYSTEM WITH MANUAL LIGHTING:
Turn the main switch to position 2 and wait until the machine reaches work-
ing pressure (see "Operating procedures" - "Boiler pressure"). To light the
burner, press the gas push-button (n°1) and keep it pressed and light the
burner with a match. Release the gas push-button after about 8/10 seconds.
Use the "minimum flame" (n°2) regulation screw to obtain the required flame
height (1/1.5 cm. high), turning it clockwise to increase the flame and coun-
terclockwise to reduce it. At this point remove the protection cowl (det. A) af-
ter having slackened the "knurled" nut (det.B); use the regulation screw (det.
C) until the required pressure is reached (clockwise for an increase in pres-
sure). To increase the gas flow, turn the gas jet ring-nut (det.D) in a clock-
wise direction. Greater combustion (blue flame) may be obtained by increas-
ing the air flow through the slot in the sleeve (det.E). On the other hand
lesser combustion (red flame) is obtained by reducing the air flow.
GAS SYSTEM WITH ELECTRICAL LIGHTING:
Turn the main switch to position 2 and wait until the machine reaches work-
ing pressure (see "Operating procedures" - "Boiler pressure"). To light the
burner, press the gas push-button and keep it pressed; at the same time in-
termittently press the spark generator's electric ignition push-button. Release
the gas push-button after about 8/10 seconds. Use the "minimum flame"
regulation screw to reduce the flame to the required minimum (1/1.5 cm.
high), turning it in a clockwise direction. At this point use a 4 mm. Allen key
on the other regulation screw, turning it counterclockwise until the required
pressure is obtained. To increase the gas flow, turn the gas jet ring-nut in a
clockwise direction. Greater combustion (blue flame) may be obtained by in-
creasing the air flow through the slot in the sleeve. On the other hand lesser
combustion (red flame) is obtained by reducing the air flow.
4.C. ADJUSTMENTS
ONLY AUTHORIZED AND QUALIFIED PERSONNEL MUST DO THESE ADJUSTMENTS!
PUMP PRESSURE ADJUSTMENT
It is shown on the blue scale of the delivery manometer. It can be regulated using the pump's
bypass screw:
• turn clockwise to increase the pressure
• turn counterclockwise to decrease the pressure
BOILER PRESSURE ADJUSTMENT
It is shown on the red scale of the manometer. It can be regulated using the pressure switch's
screw:
• turn clockwise to decrease the pressure
• turn counterclockwise to increase the pressure
Note: It is shown on the red scale of the manometer.
GAS HEATING ADJUSTMENT - OPTIONAL
See "Start up - Versions with gas system".
REV. 2 04/2007 ENGLISH - 8