Gas Manifold - Bosch GWI-N Series Training And Service Information

4.3

Gas manifold

The gas manifold is a gas distribution pipe with integrated drilled injectors and two pressure measuring
points:
- gas valve pressure = P
- air fan pressure = P
The manifold cover allows the gas supply to the burner over 2 different segments, in order to assure a wide
modulation range according to the capacity of the appliance.
The gas manifold for GWH 12 models have in total 9 injectors with following distribution:
- NG Ø 1.7
- LPG Ø 1.3
Pict. 16 – Gas manifold for 12l/min (Indoor / Outdoor) appliance with 9 injectors
The gas manifold for GWH 16 models have in total 15 injectors with following distribution:
- NG Ø 1.7
- LPG Ø 1.3 (in 16 l Indoor) or Ø 1.25 (in 16 l Outdoor)
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Pict. 15 – Primary air plate examples
burner
box
Injectors
6 720 814 719 SM FP_Australia 2017/04 EN
GWH 26
GWH 16 / 20
GWH 12
Burner segment 2
Burner segment 1