Maintenance; Flue Gas Safety Device; Burner Pressure Adjustment; Conversion To A Different Type Of Gas - Bosch GWH 10-2 G Series Installation Manual And Operating Instructions

Maintenance

6.2

Burner pressure adjustment

Accessing the adjusting screw
▶ Remove the front cover from the heater (see 4.3).
Connecting the manometer
▶ loosen the burner test point captive screw (Fig. 18).
▶ Connect the manometer to the burner pressure measuring
point.
Fig. 18 Pressure measurement point
Maximum gas flow adjustment
▶ Remove the seal from the adjusting screw (Fig. 19).
▶ Turn on the heater with the gas adjustment set to maximum
(anti clockwise) and the water flow adjustment set to
minimum (clockwise).
Fig. 19 Maximum gas flow adjusting screw
▶ Open various hot water taps.
16
▶ Using the adjusting screw (Fig. 19), regulate the gas
pressure until the values indicated in the table 6 are
achieved.
▶ Seal the adjusting screw once again.
Minimum gas flow adjustment
MAX Burner
Pressure (kPa)
Table 6
6.3
It is not recommended to convert these units to a different gas
type.
7
6720607418-01.3V
To ensure that gas consumption and the environmental load
(pollution, etc.) remain as negligible as possible over time, we
recommend the appliance be maintained on an annual basis.
These jobs can only be done by a qualified technician.
7.1
6720607418-02.2V
Operation and precautions
This probe verifies the condition of flue gas evacuation and, in
case of malfunction, it automatically turns off the heater. This
The minimum gas flow adjustment is performed
automatically after the adjustment of the
maximum gas flow.
Natural gas H
GWH10
GWH13
GWH16
Burner pressure

Conversion to a different type of gas

Maintenance
DANGER:
Failure to perform maintenance procedures
can lead to appliance malfunction, errors,
service calls and loss of warranty.
Maintenance must only be performed by a
qualified technician. Maintenance information
is contained in a service manual available to
licenced technicians upon request from Bosch.

Flue gas safety device

DANGER:
The probe must never be turned off, modified
or replaced with a different part under any
circumstances.
LP gas
0.69 2.00
0.66 1.90
0.44 2.20
6 720 608 992 (2021/02)