MHS Boilers ADI LT, Инструкция по установке, эксплуатации и обслуживанию

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ADI LT boiler - Technical Manual Page
L338 11/2011
48
16.3 GAS - AIR ADJUSTMENTS
All the boilers are tested in our factory and every one is supplied with a table indicating the combustion figures.
Both the start-up and the maintenance must be realized by authorized technical staff.
First of all verify: electric supply, if the gas connection is air vented, type of gas and pressure, if the heating demand
is at the maximum value, correct draught of the chimney, if the hydraulic installation is purged, if the pump is
correctly working...
The process would be as follows:

First adjust the combustion at the minimum power (to avoid lockout).

Adjust combustion at the maximum power.

Adjust combustion at the minimum power.

Repeat the previous steps at minimum and maximum power.

Once adjusted, check the combustion at the intermediate stages between the minimum and the maximum
power.
Any change in the multiblock gas valve produces a change in the combustion, both at the maximum and the
minimum power. Check them alternatively until you reach the required combustion figures.
Check combustion in the main burner:
- Ionization current (> 5 m microamperes): connect in series the meter to the ionization electrode and to its
electric connection.
-
Pressure: gas (Pg), combustion chamber (Pf), air-gas mix (Pa) (similar to the values indicated in the
combustion document issued in our factory).
- Gas flow.
- Combustion parameters: CO
2
, O
2
, CO, flues temperature, air temperature, efficiency, water
temperatures.
Models Range CO2 (%) for Natural Gas
ADI LT 105 to 175 7,3 - 9,1%
ADI LT 200 to 250 7,3 - 8,5%
ADI LT 325 to 750 7,3 - 8,8%
ADI LT 850 to 950
-----
Remember that these changes must be realized by specialized technicians.
16.3.1 Combustion adjustment
a) Once the boiler is operating.
b) Increase the set-up temperature to the maximum.
c) In the control panel press simultaneously the buttons 4 and 5 during a time longer than 6 seconds.
d) The boiler is now in manual operation mode, and the display shows:
-
the lower right pointer flickers intermittently
-
the relative power is adjusted.
The function of the controller PID is disabled.
e) First adjust the combustion at the maximum power.
f) Increase the fan revolutions to the maximum value configured for the boiler:
- You can increase (press the button 9) or decrease the power (press the button 8) point by point (in
percentage)
- You can directly select the maximum power (press the button 7) or the minimum power (press the button 6).
g) Check the content of CO
2
with the flue analyzer (by introducing the probe inside the flues outlet of the boiler
that you are adjusting).