CHECKING THE QUANTITY OF GAS AT IGNITION
To check the quantity of gas at ignition, apply the following formula:
Ts x Qs ≤ 100
where Ts = Safety time in seconds
Qs = Energy freed in safety time expressed in kW
The Qs value is obtained from:
Q1
3600
x
Ts1
1000
Qs =
Qn
where Q1 = delivery expressed in liters freed in no. 10 startups in safety time.
Ts1 = total safety time of 10 startups
Qn = Rated output
To obtain Q1, proceed as follows:
- Detach the lead from the control electrode (ionization electrode).
- Perform 10 burner startups; these correspond to 10 safety lock-outs.
- Read the gas meter again; by subtracting the first reading, the Q1 value is obtained.
Example:
First reading
00006,682 liters
Final reading
00006,947 liters
total Q1
00000,265 liters
By performing these operations, we can find Ts1 by timing no. 1 startup (safety lock-outs) by the no. of
startups.
Example:
Actual safety time 1"95
Ts1 = 1"95 x 10 = 19"5
If, at the end of this checkup, the value is above 100, regulate the opening speed of the main valve.
8127
x
860
x 100
48