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Instructions for the installer
3.10 - GAS CONENCTION
DANGER!
The gas connection must be carried out only
by a qualified registered engineer who will
have to respect and comply to the regulations
in force and to the requirements indicated by
the local gas supplier. An incorrect installa-
tion could cause injury to persons, animals or
damage to property. The manufacturer shall
not be held liable for any injury and/or
damage.
Before installing the boiler it is recommended
to thoroughly clean all the supply piping in
order to remove any eventual residual grime
which could compromise the boiler's correct
functioning.
If you smell gas:
a.
Do not turn on or off electrical switches,
use the telephone or any other object which
can provoke sparks;
b.
Open all doors and windows in order to
allow fresh air to enter and purify the room;
c.
Close all gas cocks
d.
Contact a service engineer, qualified
installer or your gas supplier.
As a safety measure against gas leaks,
Unical recommends installing a surveillance
and protective system composed of a gas
leakage detector combined with an on-off
selenoid valve fitted on the gas supply line.
The gas supply pipe must have a section which is adequate
to the burner's output.
It is however important to comply with the specific standards
and requirements in force.
Before commissioning an internal gas distribution system
and therefore before connecting it to the gas meter, the
complete installation must be tested for gas soundness.
If any part of the system is concealed from view the gas
soundness test must be carried out before covering the
pipes.
Before connecting the pipework the system must be tested
with air or inert gas at a pressure of at least 100mbar.
Before commissioning the boiler ensure that the following
operations are carried out:
-
Open the gas meter cock and vent the air contained in
the piping and subsequently proceed to vent device by
device.
-
Check, with the gas cock turned off, that there are no gas
leaks. During the 2nd quarter of the hour from the start of
the test, no pressure drop should be detected by the
pressure gauge. Any gas leaks must be found by using
only water soap solutions, or an equivalent product, and
eliminated.
-
Never look for gas leaks using a naked flame.
1
2
3
4
5
6
6
1 On-off gas supply valve
2 Double membrane regulator
3 Gas Filter
EXAMPLE OF A GAS SUPPLY SYSTEM
4 Anti-vibrating joint
5 Selenoid valve
6 On-off cock