Thermostat Setting - Bosch 13P Installation & Operating Instructions Manual

Method :-
Step 1.
Adjust maximum water flow to 10 -13 litres a minute
( Bosch 13P ) or 13-16 litres a minute (Bosch 16P ).
Adjust using the slotted head screw in the base of the
brass water valve. Turn clockwise to decrease water
flow ( higher water temperature ) .
Water flow can be measured by the time taken
( seconds ) to fill a container of a known quantity.
I.E.: A 2 litre container fills in 12 seconds
Therefore 60 ÷ 12 seconds × 2 = 10 litres a minute.
Step 2.
Loosen burner pressure test point and attach U tube manometer, light
appliance and open hot water tap fully. Measure the distance between the two
water columns
.
1 KPa = 100 mm
Adjust natural gas appliances at the pressure regulator fitted to the gas inlet
pipe and LP Gas appliances are to be adjusted at the regulator fitted to the
supply cylinder.
If the burner pressure is not correct check the gas
inlet pressure at the test point located on the right
hand side of the gas valve . The inlet pressure
should be measured with the appliance operating.
Step 3.
With the manometer still connected turn a hot water
tap on to give a flow rate of 5 litres a minute ( fill a 1
litre container in 12 seconds ).
Allow water to run for 1-2 minutes and measure temperature. Adjust to give an
outlet temperature of 60°C.
When an outlet temperature of 60°C is obtained ensure that the burner
pressure is lower than in step 2 , this will confirm that the thermostat is
sensing the hot water and closing the gas supply to give only the amount of
fuel required to achieve 60°C.
Now reduce the flow of water to a rate of 2 litres a minute, the temperature
should not exceed 63°C If incorrect replace flow thermostat insert.
Step 4.
After completing all the above adjustments open the hot water tap fully and
observe that the burner pressure returns to that stated on the rating label. This
will ensure that the thermostat is sensing the cold water and opening the gas
fully.
Remove the manometer and tighten the burner pressure test point.
9 708 069 951

Thermostat Setting

2.6 KPa = 260 mm
25/10/2011
Water Flow
d ustment Screw
Temperature
adjustment nut
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