6 720 817 545 (2016/02) Optiflow
16 | Regulating the gas (only for authorised technicians)
▶ Press the button .
The appliance is now ready for adjustment of the maximum
gas flow.
▶ Open a hot water tap.
▶ Press or until the pressure gauge shows the
value indicated in table 10.
▶ Press for 3 seconds.
The displayed value flashes as a sign of confirmation.
▶Press .
Display will show "L1".
▶ Close the hot water tap.
▶ Press until the display shows "E".
▶ Press the button .
Display will show P1.
The adjustment of the maximum gas flow is completed.
5.3.3 Adjusting the minimum flow (Parameter P2)
▶ Press until the display shows "P2".
▶ Press the button .
Display will show "E".
▶ Press until the display shows "L2".
▶ Press the button .
▶ Open a hot water tap.
The appliance is now ready for adjustment of the minimum
gas flow.
▶ Press or until the pressure gauge shows the
value indicated in table 10.
▶ Press for 3 seconds.
The displayed value flashes as a sign of confirmation.
▶Press .
Display will show "L2".
▶ Close the hot water tap.
▶ Press until the display shows "E".
▶ Press the button .
Display will show "P2".
▶ Simultaneously press the , and for 3
seconds.
Display will show the temperature selected.
▶ Disconnect the pressure gauge from the test points [A] and
[B].
▶ Tighten the shutter screws of the test points [A] and [B].
The adjustment of the minimum gas flow is complete.
5.3.4 Adjusting pressure at the burner (Parameter P0)
▶ Enter the Service menu by pressing and holding down the
, , and buttons simultaneously for 3
seconds.
Display will show "P2".
▶ Press until the display shows "P0".
▶ Press the button .
▶ Open a hot water tap.
With the pressure gauge connected, let the value measured
stabilise.
▶ Press or until the pressure gauge shows the
value indicated in table 10.
If it is not possible to reach the differential
pressure value:
▶ Adjust the pressure in the burner
(section 5.3.4) and repeat the
procedure for adjusting minimum flow.
If it is not possible to reach the differential
pressure value:
▶ Adjust the pressure in the burner
(section 5.3.4) and repeat the
procedure for adjusting minimum flow.
Natural gas H LPG
Øinjector
GWH16
1.7 1.25
GWH20
10 x 2.0
5 x 1.7
10 x 1.5
5 x 1.3
GWH26
2.0 1.55
Dynamic
connection
pressure
(kPa)
GWH16
GWH20
GWH26
1.13 2.75
Burner
pressure
(kPa) - P0
GWH16
GWH20
GWH26
0.12
Differential
pressure of
the burner
MAX (kPa) -
P1
GWH16
0.22 - 0.28 0.25 - 0.32
GWH20
0.21 - 0.26 0.26 - 0.32
GWH26
0.21 - 0.29 0.18 - 0.26
Differential
pressure of
the burner
MIN (kPa) -
P2
GWH16
0.03 - 0.06 0.04 - 0.06
GWH20
0.03 - 0.05 0.05 - 0.07
GWH26
0.02 - 0.05 0.03 - 0.06
Table 10 Pressure of the burner
Burner pressure adjustment is only required
if “L1” and “L2” cannot be achieved
according to table. 10
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