Adjusting Pressure In The Burner (Parameter P0); Factory Default Settings - Bosch OptiFlow Professional GWH12 1 CTD E23 F3 OL Installation Manual

16 | Regulating the gas (only for authorised technicians)
Ø injector GWH12
Dynamic
connection
GWH12
pressure
(mbar)
Burner
pressure GWH12
(mbar) - P0
Differential
pressure of
the burner GWH12
MAX (mbar) -
P1
Differential
pressure of
the burner GWH12
MIN (mbar) -
P2
Table 8 Pressure of the burner

6.3.4 Adjusting pressure in the burner (Parameter P0)

Burner pressures adjustment is only
required if "L1" and "L2" cannot be achieved
according to table, 8.
▶ Enter the service mode by pressing and holding down the
, , and
seconds (section 6.2).
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 tab. 8.
▶ Press for 3 seconds.
The displayed value flashes as a sign of confirmation
▶ Press to exit this function.
Display will show P0.
▶ Close the hot water tap.
The adjustment of the burner pressure is complete.
6 720 810 559 (2016/06)
Natural gas H Universal
LP gas
1.7
11.3 27.5
1,2
4.6 - 5.0 6.3 - 6.7
0.5 - 0.8 0.5 - 0.8
buttons simultaneously for 3
.
6.4

Factory default settings

▶ Enter the service mode by pressing and holding down the
,
1.3
seconds (section 6.2).
Display will show"P2".
▶ Press
▶ Press the button
Display will show"E".
▶ Press
▶ Press the button
Display will show "P1"
▶ Press
The value flashes as a sign of confirmation.
▶ Press
Display will show "P1"
▶ Press
▶ Press the button
The value flashes as a sign of confirmation.
▶ Press
Factory default settings are now restored.
, and buttons simultaneously for 3
until the display shows "P4".
.
until the display shows "rP".
.
for 3 seconds.
.
until the display shows "P2".
for 3 seconds.
.
OptiFlow Professional