Electrode Settings; Burner Adjustment; Combustion Head Adjustment - Bosch Worcester Greenstar Utility 32/50 Installation, Commissioning And Servicing Instruction Manual

6.5.2

Electrode Settings

Riello RDB 3.2 BX (32/50)
The burner head is shown without the recirculation tube
for clarity.
▶ Adjust the electrodes settings to the values below.
B ± 0.3
C
Fig. 43 RDB 3.2 BX electrode settings
A
4.6mm
Table 15 RDB 3.2 BX electrode settings
Riello RDB 3.2 BT (50/70)
To adjust the diffuser disc unit:
▶ Loosen the securing screw [1].
▶ Move the diffuser disc unit to setting dimension A.
▶ Tighten screw [1] to secure in place.
To adjust the electrodes unit:
▶ Loosen the securing screw [2].
▶ Move the electrodes unit to setting dimension B.
▶ Tighten screw [2] to secure in place.
+ 0.5
3
0
1
2
Fig. 44 RDB 3.2 BT electrode settings
A
B
Table 16 RDB 3.2 BT electrode settings
Greenstar Utility ErP - 6 720 821 751 (2018/04)
6720821571-40.1Wo
B C
3mm 2 - 2.5mm
B
A
6720821571-43.1Wo
6.5 + 0.7/-0.5
± 0.5
3.5
6.6

Burner adjustment

6.6.1

Combustion head adjustment

Riello RDB 3.2 BX (32/50)
▶ Turn the adjustment screw [A] and set the combustion head to the
correct output required, refer to table 13.
– Distance between two notches equals three millimetres
– e.g. to set 21mm at the combustion head turn the adjustment
screw [A] until seven notches are visible from the zero notch
– e.g. to set 17mm at the combustion head turn the adjustment
screw until six notches are visible from the zero [0] notch and
then back the adjustment screw off one turn (1mm) to achieve
17mm.
– One complete rotation of the adjustment screw [A] equals one
millimetre of movement at the combustion head
– All distances are measured from the zero [0] notch to the
adjustment assembly face [X]
0
A
Fig. 45 RDB 3.2 BX combustion head adjustment
Riello RDB 3.2 BT (50/70)
▶ Loosen the two screws [1] in the ring slots.
▶ Turn the blast tube until the end of the slotted ring [2] lines up with
the notch value [3] for the required output, refer to table 14.
▶ Tighten the two screws [1], once adjustments have been made.
Fig. 46 RDB 3.2 BT combustion head adjustment
[1] Screws
[2] Slotted ring
[3] Combustion head setting notch
[4] Blast tube
Commissioning
X
0
3 mm
1
2
0
3
4
1
6720821571-44.1Wo
31