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Regulating The Gas; Technicians); Factory Settings; Service Function - Bosch Optiflow Professional GWH12 Installation Manual

Room sealed gas continuous flow water heaters 1 ctd e23/31 f5 l
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▶ Press the button
The value flashes to confirm the new setpoint limit.
Calibration example
Setpoint
Water temp. at tap
50 °C
48 °C
Table 12
5
Regulating the gas (only for authorised

technicians)

5.1

Factory settings

The data plate on the each appliance will show the factory
setting of that appliance.
Natural gas
The appliance must not be operated if the
dynamic connection pressure is less than
1.13 kPa or greater than 2.75 kPa.
Universal LPG
The appliance must not be operated if the
dynamic connection pressure is less than
2.5 kPa or greater than 4.5 kPa.
DANGER:
▶ The operations described below must only
be carried out by an authorised service
technician.
Optiflow Professional
for 3 seconds.
Calibration
+2 °C
Regulating the gas (only for authorised technicians) | 17
5.2

Service function

Accessing the service function
▶ Press and hold down at the same time
for 3 seconds.
Fig. 8
Service function
The display will show "P2".
The service function is now activated.
5.3

Adjusting the appliance

5.3.1 Access to the test points

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

5.3.2 Adjusting the maximum flow (Parameter P1)

▶ Turn on the appliance using 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 [B].
,
,and
+
-
6720804089-11.1V
6 720 810 560 (2016/06)
B

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