NORLAND
10
4.9 PRESSURISED BOILER CONNECTION
Before installation, clean the inside of all the fuel supply pipes, to remove any residues that might compro-
mise correct boiler operation. Check the maximum combustion chamber pressure, as shown in the technical
characteristics table, the observed value can increase by 20 %. As the fuel used should only be gas,make the
following checks:
a) check the internal and external fuel supply system for any leaks;
b) adjust the fuel supply rate as to the required boiler heat rating;
c) check that the boiler is supplied with the type of fuel for which it has been arranged;
d) check that the fuel supply pressure is within the values shown on the burner data plate;
e) check that the fuel supply system is dimensioned adequately for the fuel supply rate that the boiler re-
quires, and that the fuel supply system is complete with all the safety and control devices required by
current applicable regulations.
f) check that the gas line and collector pipes conform to current applicable standards and regulations;
g) check that all gas connections are perfectly gas-tight;
h) check that the boiler room ventilation openings are dimensioned to guarantee an air flow as foreseen by
applicable regulations, and in any case sufficient for perfect combustion;
i) check that the gas pipes are not used as a ground (earth) for electrical devices.
If the boiler will not be used for some time, close the fuel supply.
IMPORTANT: check that the spaces between the burner sleeve and the boiler door are filled with
thermal insulation (Fig. 3).
A piece of ceramic fibre insulation rope is provided with the boiler. If this is not
suited to the specific burner fitted, use a rope of another diameter, of the same type of material.
All details on the draught tube lenght (
P6
), the diameter of the burner hole (
Øb
) and the pressurization are in-
cluded in the par. Technical Specifications.
4.10 WIRING DIAGRAM
See wiring diagram inside the boiler control panel supplied:
•
Control panel with thermostats (standard)
•
Control panel with RVA 43 digital controller for high/low burners (optional)
•
Control panel with RVA 63 digital controller for modulating burners (optional)
REMARK: specific instructions are provided for the digital controllers, control panels.
1
4
3
2
Fig. 3
KEY:
1. Burner
2. Manhole
3. Thermoinsulating material
4. Flange
P6
Ø
b
Summary of Contents for Norland
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