54
TECHNICAL ASSISTANCE SERVICE
ENGLISH
OIL PUMP
7
6
5
4
3
2
8
1
1 - Suction port
2 - Return port
3 - By-pass screw
4 - Pressure gauge fitting
5 - Pressure regulator
6 - Vacuum gauge fitting
7 - Valve
8 - Auxiliary pressure measurement fitting
ADJUSTING PUMP PRESSURE
Turn the adjuster screw (5) to achieve the pressure setting
specified in the table on page 49
ADJUSTING THE AIR DAMPER
The air damper can be adjusted without removing the
burner cover.
- Use an Allen key to turn the adjuster screw (1) to
achieve the required setting on the graduated scale (2).
b
5
1
2
3
4
5
0
6
1
2
13
12
A
ADJUSTING FLUE GAS RECIRCULATION
When installing the boiler in unfavourable conditions,
such as at altitudes over 500 metres above sea level or
where the temperature of the intake air is below 10°C, you
may have to adjust flue gas recirculation in order to avoid
burner ignition problems.
Proceed as follows to adjust the flue gas recirculation
slots.
- Loosen the screws (13).
- Close the slots a bit at a time using the choke (12), until
gap "A" is achieved. This should make burner ignition
easy (recommended gap A = 6 mm).
- Re-tighten the two screws (13) to a torque of 10 Nm +-2
Nm.