Pag. 13
CHECKING THERMAL POWER
During initial installation and during maintenance or adaptation to another type of gas nominal heat input must
be measured. It can be measured by using the volumetric method with the aid of a litre counter or a chronome-
ter. After checking connection pressure and the diameter of the burner injectors, measure the hourly flow of the
gas and compare the recorded value with the value set out in the specifications table under the heading “gas
consumption”. Deviation of ± 5% from nominal value is permitted.
The appliance must be supplied with one of
the types of gas whose properties and pres-
sure are set out in the table below:
Connect the appliance to a special gas pipe
with an internal diameter of at least 16 mm for
G1/2” connections and a diameter of at least
20 mm for G3/4” connections. The coupling
must be metal and the pipe may be rigid or
flexible. Make sure that the flexible metal pipe that is fitted to the gas coupling does not touch overheated parts
and is not twisted. Use fixing clips that comply with installation standards. Fit stopcocks or gate valves whose
internal diameter is not less than the above connecting pipe. After connecting the pipe, make sure that the joints
and couplings have no leaks. Use soapy water or a purpose-designed foam product to detect leaks.
NEVER USE NAKED LIGHTS!
S
E
P
Y
T
S
A
G
r
a
b
m
n
i
E
R
U
S
S
E
R
P
.
M
O
N
N
I
M
X
A
M
S
A
G
L
A
R
U
T
A
N
0
2
G
0
2
7
1
5
2
1
3
/
0
3
G
.
G
.
P
.
L
7
3
/
0
3
-
8
2
5
2
/
0
2
5
4
/
5
3
Gas supply pressure must be measured at
the pressure point (Ref. B) after removing the
sealing screw (Ref. A). Use a flexible pipe,
connect a gauge e.g. a liquid gauge that is
accurate to 0.1 mbar) to the pressure point
(and measure the intake pressure whilst the
appliance is operating. If the pressure rea-
ding does not fall within the upper and lower
limits indicated on the table, the appliance
cannot be installed.
Switch off the appliance, disconnect the
1.5 CONNECTING TO A DIFFERENT TYPE OF GAS
REPLACING MAIN BURNER NOZZLE (Fig. 7)
A
Nozzle fixing nut
B
Nozzle
C
Primary air supply adjusting bush
D
Bush locking bolt
-
Open door or doors.
-
Remove oil collection trays.
-
Loosen nozzles (ref. B) and replace
them with nozzles that are suitable for the
gas specified on the rating plate.
The nozzles are marked in hundredths of a
millimetre.
Fig. 6
CHECKING GAS PRESSURE
gauge and close the seal screw without forgetting to insert the washer (Ref. C) and contact the gas company to
test main gas supply pressure.
A pressure adjuster may have to be fitted upstream of the appliance.
Fig. 7
