Strebel ML 125 GT, Техническое руководство

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9
4 INSTALLATION
Before connecting the boiler, carry out the following operations:
•Flush and
clean carefully all the system pipework to remove any residues that could damage impede correct boiler
operation;
•
Check that the flue has sufficient draught, has no restrictions, is free of all soot and residues, and is perfectly
gas tight in particular to the condensate and water vapour contained in the flue gas. Check further that no other de-
vices are connected to the flue. Take account of applicable regulations.
4.1 HEATING SYSTEM
4.1.1 Boiler room
The system must correspond to current applicable regulations. In all cases, the boiler must be installed in
adequately ventilated rooms that also have sufficient space for routine maintenance and repair work.
4.2 FLUE
The ML boiler that is now a part of your heating system (boiler dimensions shown in this manual do not include the
burner) has a burner with a fan that supplies, to the combustion chamber, the quantity of air needed for the
fuel, at the correct pressure to move products to the chimney / flue.
The boiler flue gas connection to the chimney base must be inclined, rising in the direction of flow, with a
suggested slope not less than 10%. The path of this connection shall be as short and straight as possible,
any bends being designed taking account of the rules used in designing flues.
Chimneys must in any case be dimensioned according to Standard
UNI 9615
.
WARNING
The flue gas temperatures produced by ML boilers are considerably lower than non-condensing boilers, and have therefore
very high relative humidity. For these reasons the chimney must be completely watertight, stand corrosion attack by acid
condensate and must be adequately insulated to guarantee sufficient draught.
4.2.1 Condensate drain
4.3 WATER CONNECTIONS
Make sure that the water pressure downstream of the water supply pressure reducer is lower than the
working
pressure shown on the boiler data plate.
During operation, the water in the heating system increases in pressure; make sure therefore, that the
maximum pressure reached does not exceed the maximum admissible pressure for the boiler as shown on the boil-
er plate.
Make sure that the safety valve discharge fittings of the boiler and of any sanitary water heater are connected
to the drains via an open funnel, so that if the safety valves open, the boiler room will not be flooded
.
Make sure that the water and heating system pipework
are not used as a ground for the electrical system
other than
equipotential bonding .
if so, serious damage can be caused in a short time to the boiler, pipework, water heater and radiators. Once the
heating system has been filled with water, close the water supply valve, and keep it closed. Any water leaks from
the system will then appear as pressure drops, as shown by the system pressure gauge.