Ormandy Group Norland, Technical Manual, Page: 8 / 18

NORLAND
7
4 INSTALLATION
Before connecting the boiler, carry out the following operations:
•
Clean carefully all the system pipe work 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 per-
fectly gas tight in particular to the water vapour contained in the flue gas. Check further that no other de-
vices are connected to the flue. Take account of applicable regulations in this regard.
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 allow routine maintenance and repair work.
4.2 FLUE
The pressurised boiler that is now a part of your heating system uses this denomination as the boiler includes
a burner with a blower that supplies, to the combustion chamber, the quantity of air needed for the fuel, at a
pressure equivalent to the sum of the air-flow pressure drops caused by the flue gas path.
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 air ducts.
Chimneys must in any case be dimensioned according to Standard
UNI 9615 .
WARNING
The flue gas temperatures produced by MONOLITE boilers are considerably lower than in the case of
non-condensing boilers, and have therefore very high relative humidity. For these reasons the chim-
ney must be completely watertight, must withstand corrosion attack by acid condensate and must be
adequately heat-insulated to guarantee sufficient draught.
4.2.1 Condensate drain
Connect condensate drain:
A siphon must be installed on the condensate drain pipeline to avoid
flue gas leakage.
4.3 WATER CONNECTIONS
Make sure that the water pressure downstream of the water supply pressure reducer is lower than the work-
ing 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 component as
shown on the component number plate.
− Make sure that the safety valve discharge fittings of the boiler and of any sanitary water heater are con-
nected 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 pipe work are not used as a ground for the electrical sys-
tem : if so, serious damage can be caused in a short time to the boiler, pipe work, water heater and radia-
tors.
−
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.
NOTE: IF ONLY ONE RETURN IS REQUIRED, ALWAYS USE THE LOW TEMPERATURE ONE