Adjusting The Appliance; 6.3.1 Access To The Pressure Heads; Adjusting The Maximum Flow (Parameter P1); Adjusting The Minimum Flow (Parameter P2) - Bosch OptiFlow Professional GWH12 1 CTD E23 F3 OL Installation Manual

6.3

Adjusting the appliance

6.3.1 Access to the pressure heads

▶ Remove the front of the appliance.
A
Fig. 9
[A] Air pressure test point
[B] Gas pressure test point

6.3.2 Adjusting the maximum flow (Parameter P1)

▶ Connect the appliance on the ON/OFF button.
▶ Loosen the test point screw of the gas pressure test point
.[B]
▶ Connect the pressure gauge connection "+" to the gas
pressure test point.
▶ Loosen the test point screw of the air pressure test point
[A].
▶ Connect the negative (-) side of the pressure gauge to the
air pressure test point [A].
▶ Press until the display shows "P1".
▶ Press the button
Display with indication "E".
▶ Press until the display shows "L1".
▶ Press the button
The appliance is in the position for adjustment of the
maximum gas flow.
▶ Open a hot water tap.
▶ Press or until the pressure gauge shows the
value indicated in tab. 8.
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.
OptiFlow Professional
+
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6720804089-11.1V
.
.
Regulating the gas (only for authorised technicians) | 15
▶ Press
The value flashes as a sign of confirmation.
▶ Press .
Display will show "L1".
▶ Close the hot water tap.
▶ Press
▶ Press the button
Display will show P1.
The adjustment of the maximum gas flow is completed.
B

6.3.3 Adjusting the minimum flow (Parameter P2)

▶ Press
▶ Press the button
Display will show "E".
▶ Press
▶ Press the button
▶ Open a hot water tap.
The appliance is now ready for adjustment of the minimum
gas flow.
▶ Press
value indicated in tab. 8.
If it is not possible to reach the differential
pressure value:
▶ Adjust the pressure in the burner
▶ Press
The displayed value flashes as a sign of confirmation.
▶ Press .
Display will show "L2".
▶ Close the hot water tap.
▶ Press
▶ Press the button
Display will show "P2".
▶ Simultaneously press the
seconds.
Display with indication of temperature selected.
▶ Disconnect the pressure gauge from the test points [A] and
[B].
▶ Tighten the shutter screws of the pressure test points [A]
and [B].
The adjustment of the minimum gas flow is complete.
for 3 seconds.
until the display shows "E".
.
until the display shows "P2".
.
until the display shows "L2".
.
or until the pressure gauge shows the
(section 6.3.4) and repeat the
procedure for adjusting minimum flow.
for 3 seconds.
until the display shows "E".
.
, and
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