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SECOND STAGE POWER REGULATION.
After having completed the ignition power adjustment, press key
(9) towards symbol in order to reach air and gas maximum
delivery.
Check that the electric servomotor second stage gas
flow rate regulation cam is positioned at
130°.
•
To regulate the gas flow operate the valve pressure regulator.
Consult the instructions related to the installed gas valve
model. Avoid keeping the burner running if the heating capacity
is greater than the maximum amount allowed for the boiler, to
avoid damaging it.
•
For adjusting the air flow rate, operate on the screws (11),
correct the rotation angle of the air gate in the suitable position
to guarantee the right quantity for the power burned.
•
Check the combustion parameters with appropriate instruments
(C02 max= 10%, O2 min=3%, CO max=0,1%)
FIRST STAGE POWER REGULATION
After regulation of the burner in maximum flame, restore the
burner to minimum flame. Turn the selector (9) to minimum (MIN)
position without varying the adjustment of the gas valve already
performed.
•
Regulate the minimum flame gas flow rate to the required value
using the regulation cam for servomotor minimum output.
•
Check the combustion parameters in the 1st stage with
appropriate instruments (C02 max= 10%, O2 min=3%, CO
max=0,1%)
ADJUSTING THE FLOW RATE FOR IGNITION
•
Once regulation of minimum flame has been carried out, the
burner needs to be switched off and check that ignition occurs
properly. If necessary, it is possible to optimise burner regulation
during ignition, proceeding as follows:
- Adjust the ignition gas flow rate, by acting on the ignition
power adjustment cam. It is often advisable to set the
ignition cam to a slightly higher angle than the one of the
minimum flame cam.
•
Check the activation of the flame detector (ionisation electrode)
by disconnecting the ionisation cable and connecting the burner.
The equipment must run through its cycle completely and, three
seconds after the ignition flame has formed, “lock-out”.
This test should also be conducted with the burner already on.
The apparatus should shut down immediately when the ionisation
cable is disconnected.
•
Check the efficiency of the thermostats or boiler pressure
switches (they should shut down the burner when triggered).
IMPORTANT
Once the adjusting operations are completed, visually
check that the thin plate on which the bearing acts has a
progressive profile.
Using the special instruments, check also that throughout
the entire burner operating range, the combustion
parameters are not too far from optimal values.
CAUTION / WARNINGS
The throttle valve for gas adjustment is factory set to
position "1" on the lever. If it is necessary to decrease the
opening angle of the gas throttle, set the joint to position “2”.
11
12
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Summary of Contents for TBG 800 MC
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