Unical XC-K Series, Инструкция по установке и обслуживанию

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Installation instructions
3.12 - CONNECTING GAS
Danger!
The gas connection must be carried out only
by a qualified installer who must respect and
apply that foreseen by relevant laws in force in
the local prescriptions of the supply company.
Incorrect installation can cause damage to
persons, animals and objects for which the
manufacturer cannot be held responsible.
Before installation, we recommend a thorough
inner cleaning of all fuel adduction piping to
remove any residue which could jeopardise
proper operation of the boiler.
Attention!
Make sure that there are no mechanical tension
points while connecting gas to avoid the risk
of leakage!
Perceiving the smell of gas:
a) Do not turn electric switches on or off,
use a telephone or any other object which
can create sparks;
b) Immediately open doors and windows to
create an air current to air out the room;
c) Shut the gas cocks;
d) Request the intervention of professionally
qualified personnel.
As a precaution against gas leaks, we
recommend installing a monitoring and
protection system consisting in a gas leak
detector coupled with a shut-off solenoid
valve on the gas feed line.
The supply pipes must have a cross-section sufficient for the
flow rate of the burner.
You should nonetheless comply with the “General installation
regulations” laid down in the standards.
Before commissioning an internal gas distribution system and
therefore before connecting it to the gas meter, check its sealing
carefully.
If any part of the system is out of sight, the sealing test must
be done before the pipes are covered.
Before connecting the appliances, the system must be tested
with air or inert gas at a pressure of at least 100 mbar.
The following operations and checks must also be performed
while commissioning the system:
-
Open the meter and air release valve to bleed the air from
the piping of the appliances, proceeding one appliance after
another.
- With the appliances closed, check that there are no gas
leaks. The pressure gauge must show no pressure drop
during the second quarter of an hour from the start of the
test. Gas leaks must be found with a soapy solution or
similar product and eliminated.
Never look for gas leaks with an open flame.
NOTE
The water pressure in the heating system must
not be drop below 1 bar; open the filling tap when
pressure is too low.
This operation must be performed with the system
cool.
NOTE
If the boiler was without electric power, after certain
idle period, the pump could be blocked. Before
turning on the main switch, the pump must be
unblocked by operating as follows:
Introduce a screwdriver in the hole below the
protective screw in the centre of the pump intended
for this purpose and turn the pump shaft
clockwise.
After having unblocked the pump, tighten the
protective screw and make sure there is no water
leakage.
ATTENTION!
After removing the protective screw, a small
amount of water could leak out.
Dry off all wet surfaces before powering the boiler.