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Commissioning
The two most important points are to set the maximum water flow rate and to ensure the
burner pressure is correct.
1. Water Flow
The water flow must be adjusted so that when a hot water tap is opened fully the appliance
has enough time to heat the water as it passes through the heat exchanger.
Open a hot water tap fully and adjust the water flow rate to the maximum rate.
Bosch 13P
13 litres / minute
Bosch 16P
16 litres / minute
In cool areas where the cold water temperature drops below 15°C in Winter it will be
necessary to set the water flow lower than the maximum rate.
Water Wizard 780
8 to 10 litres / minute
Water Wizard 960
10 to 12 litres / minute
Adjust using the slotted head screw in the base of the brass water valve. Refer Fig.5 Turn
screw clockwise to decrease flow rate (hotter water).
The time taken to fill a one litre container divided into 60 = litres a minute.
Example a one litre container fills in 6 seconds
60 ÷ 6 = 10 litres a minute.
Fig. 5
Adjustment
25/10/2011
