Joannes G35 gas Manual De Uso Y Mantenimiento página 59

pag. 56
1 Lock screw of the capacity adjustment 1st/2nd flame
2 Adjusting the stabiliser
3 Cover for adjustment protection rapid starting release
4 Adjusting 2nd flame capacity
5 Adjusting 1st flame capacity
Loosen screw 1 to adjust the capacity of the 1st/2nd flame.
Rotate 4 and 5 counterclockwise to increase the capacity.
clockwise to decrease it. After the adjustments, lock again screw
1.
The adjustment of the starting release is obtained by removing
cover 3 and by using its back side as a tool to rotate the dowel.
• Install a pressure gauge to measure the gas pressure in the combustion
head.
• Bring the gas valve in the position of maximum opening.
• When the burner is working, operate on the stabiliser to obtain
the required flow rate (read in the meter) and survey the value of
the pressure in the pressure gauge.
• Operate on the valve setting, in the direction of closing, until the
pressure starts decreasing. Now the maximum flow rate is set and
checked by the stabiliser and by the gas valve.
The check of the gas quantity at the starting is obtained by using the following formula: Ts x Qs ≥ 100
where Ts = Safety time in seconds.
The value Qs is obtained from:
where Q1 = Flow rate in litres released in no. 10 starts in safety time.
Ts1 = Sum of effective safety time in 10 starts.
Qn = Nominal output
To obtain Q1 operate as follows:
Disconnect the cable of the control electrode (ionisation electrode).
• Effect the reading in the gas-meter before the test.
• Effect no. 10 starts of the burner, which correspond to no. 10 safety blocks.
• Read again the values in the gas-meter and, by subtracting the initial reading, the value Q1 is obtained.
Example. Initial reading 00006,682 litres
Final reading 00006,947 litres
Total Q1
Qs = Energy released in safety time expressed in kW.
Q1 3600
x
Ts1 1000
Qs =
Qn
0000,265 litres
ADJUSTING MULTIBLOCK VALVE
ADJUSTING THE MAXIMUM FLOW RATE
CONTROL OF GAS QUANTITY AT THE STARTING
8127
x
860
x 100
Pressure gauge