Ascari MA12 -p. 18 -
2.7.1 Power selection
The boiler is supplied as a 12Kw modulating boiler but can be reduced to 10, 8, 6 or 4kw by disconnecting
individual elements.
* Remove blue connectors between power terminal and elements
according to drawing.
ex-work
R : Red
Bl : Black
W : White
B : Blue
12 kW 10 kW*
8 kW* 6 kW*
4 kW*
R
BBBB
WBl WBlR
BB
R
BBB
WBl WBlR
BB
R
BBB
WBl WBlR
B
R
BB
WBl WBlR
B
R
BB
WBl WBlR
View from bellow
2.8 - Commissioning & Testing
Water Treatment, Cleansing and Flushing the Heating System
NOTE: British Standard BS7593: 1992 stresses the importance of cleansing and flushing of the system to
ensure it continues to run efficiently with the minimum of maintenance necessary. Halstead Boilers fully support
this professional approach and recommend that the system is cleansed with an effective chemical cleanser and
protected long term with a suitable inhibitor. Such products are available from Fernox and Sentinal.
• Check the pressure of the expansion vessel, this should be factory set to 1bar (0.1MPa).
• The heating system should be filled using the approved installed filling loop. Ensure all radiator valves are
open. The initial system pressure when cold should be between 1.0 (0.lMPa) and 1.5bar (0.15MPa).
• Once filled check the system for leaks.
• Open the drain cock and drain the system fully.
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