38
The adjustment operation of the gas valve must be
carried out by professionally qualified personnel.
In this regard A2B srl has a network of Assistance
Points that can be reached through the seller, the
local agent, or by calling directly the Customer Care
of A2B Accorroni E.G. srl - tel. +39.071.723991.
9.3 HOW TO MAKE THE GAS CHANGE
To have: the generator installed and connected to the
electricity network and the gas network.
The gas change operation must be carried out by
professionally qualified personnel.
A wrong or incorrect assembly of the gas circuit can
cause dangerous gas leaks throughout the circuit
and particularly in tampered areas.
Also use on all suitable filler joints.
If the type of gas indicated on the label does not
correspond to the type to be used, the appliance
must be converted and adapted to the type of gas to
be used.
To change the gas, repeat the adjustment operation
described in paragraph 8.2, changing the C02
reference parameters present in the exhaust fumes.
The reference parameters to be used are those
described in table 16.
9.4 MAINTENANCE
Accurate maintenance is always a source of savings
and security.
Pursuant to the provisions contained in the D.P.R.
n.412 / 93 and subsequent modifications and
additions and of the D.P.R. n.551 / 99, maintenance
for heating systems must be carried out annually,
preferably at the beginning of the winter season, by
professionally qualified personnel.
For a correct and prolonged operation it is
recommended to carry out at least once a year a
general cleaning of the appliance (taking particular
care of the heat exchangers and fan grilles) and the
combustion tests according to the provisions of the
specific regulations.
The intervention of the limit thermostat is ALWAYS an
indication of an anomalous condition.
Before restoration, it is therefore advisable to search
for them reasons that led to the overheating of the
appliance.
In case of frequent arrests, contact the A2B Accorroni
E.G. srl.
GAS VALVE ADJUSTMENT
Fig. 33
P
INT
intermediate pressure
Air signal Pa
GAS-AIR ADJUSTMENT
Fig. 34
P
OUT
gas outlet pressure
Air signal Pa
CO2 VALUES FOR METHANE GAS
VALVE ADJUSTMENT
METHANE
9,8% - 10,2 %
LPG 10,8 % - 11,2%
Table n. 16
