Burner Pressure Adjustment - Bosch 13P Installation & Operating Instructions Manual

Commissioning

Burner Pressure Adjustment

With the gas supply turned off, loosen the captive screw in burner pressure test point
( Position A Figure 6 ) on the left hand side of the burner manifold.
Attach a "U" tube manometer , turn on the gas supply and light appliance. Open a hot water
tap to draw off more than 10 litres a minute ( in summer or when the inlet cold water is above
15°C it may be necessary to temporarily increase the maximum water flow to compensate for
the thermostat turning down the gas rate )
Adjust pressure if necessary at the pressure regulator fitted to the gas supply pipe. (Refer
data page 3)
A
Inlet Pressure
The gas supply pressure must be as stated on the appliance rating label, located bottom right
hand inside rear panel. The gas pressure at the inlet test point ( Position A Figure 7) will be
approx 100 pascals less than the supply pressure due to the pressure drop across regulator.
A
9 708 069 951 2
Figure 6
Figure 7
25/10/2011
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