Unical XC-K Series, Инструкция по установке и обслуживанию

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Installation instructions
X
XX
XX
XX
x = not less than the length of the boiler body
(dimensions in mm); in any case, never less than 1300 mm.
xx = see instructions to the side.
3.4 - POSITIONING IN BOILER
ROOM
The boiler must be installed in compliance with standards and
prescriptions in force.
The room must be well ventilated by openings with a total surface
no less than 1/30 the surface of the boiler room, with a minimum
of 0.5 m².
The ventilation openings must be permanent, communicate
directly with the outside and be positioned high or low according
to standards in force.
The location of the ventilation openings, the fuel supply circuits,
electric energy supply and lighting must comply with current
legal provisions in relation to the type of fuel used.
It is recommended to install the boiler as close to the chimney
connection as possible.
To make it easier to clean the smoke circuit, in front of the
boiler, there must be a free space no less than the length of
the boiler body and, in any case, never less than 1300 mm.
Check that with the door opened 90°, the distance between
the door and the adjacent wall is at least the length of the
burner.
The boiler can be placed directly on the floor as it is equipped
with a base.
However it is useful to provide a flat, level cement plinth capable
of bearing the weight of the boiler full of water.
When positioned on the plinth, the dimensions must be at least
Q
x
R
(see dimensions table).
When installation has been performed, the boiler must be perfectly
horizontal and stable (to reduce vibrations and noise).
fig. 11
3.3 - HANDLING
The boiler can be handled easily, lifting it by means
of upper hooks or shifting it on rollers underneath
the sturdy base longerons.
3.5 - BURNER
The burners operating with the XC-K boilers must have the EC
certification and comply with:
- Gas appliance directive (90/396/EEC);
- EMC Directive - Electromagnetic Compatibility (89/336/
EEC).
They must also be approved according to the specifications:
- UNI EN 676 - air-blown burners for gaseous fuel.
- Efficiency Directive (92/42 EEC).
3.5.1 - CHOOSING THE BURNER
The correct choice and adjustment of the burner are fundamental
for optimal operation of the boiler and therefore must be done
carefully and not underestimated.
The burner must be chosen verifying that its firing rate (fuel
capacity - combustion chamber pressure) is compatible with
the same features declared for the boiler.
Remember that pressure drops on the flue side of the boiler,
namely combustion chamber backpressure, refer to zero pressure
at the base of the chimney.
It is also recommended that the burner blast tube be no shorter
than the minimum dimension shown in the following table and
that the flame which must be implemented be suitable for the
characteristics of the combustion chamber.
In order to take advantage of the whole heat exchange surface
of the blind bottom furnaces, use burners capable of providing
a “long and narrow” flame in any operating condition, namely
even at the minimum output when controlling two or more stages
or modulating.
Flames which are too short cause overheating in the front of
the furnace and combustion products, not sufficiently cooled,
entering the smoke pipes at too high temperatures can seriously
damage the generator.
The manufacturing companies of the burners can supply the
dimensions of the flames which their appliances develop,
If necessary for clearance purposes, the door and the smoke
chamber can be removed to make it easier to enter the boiler
room.