Bosch GWH 10-2 G Series Installation Manual And Operating Instructions page 17

prevents combustion gases from entering the room where the
gas heater has been installed. The probe restarts after a reset
period.
If the heater turns off during operation:
▶ Ventilate the room.
▶ After 10 minutes, turn on the heater once again.
Call a qualified technician if the same thing happens again.
DANGER:
The user must never touch the flue gas safety
device.
Service Checklist
Water valve
• Diaphragm, replace if required
• Water throttle, greased, O-rings replaced if required
• Water filter, cleaned, replaced if required
• Sleeve, greased, replaced if required
• Water governor, clean
Gas valve
• Pilot burner cleaned
• Flame rod cleaned
• Main burner, injectors and venturies cleaned
Hydrogenerator
• Inlet clear of obstructions
Heat exchanger
• Fins cleaned
• Water connections checked and tightened
Gas pressure
• Burner pressures checked and adjusted
• Check inlet operating pressure
Flue
• Check for obstructions and tightness
• Negative pressure test
6 720 608 992 (2021/02)
Maintenance
17