User Manual

GB
14
Connecting a flexible jointless stainless steel pipe to a
threaded attachment
The gas supply pipe fitting is a threaded 1/2 gas
cylindrical male attachment.
These pipes must be installed so that they are never
longer than 2000 mm when fully extended. Once
connection has been carried out, make sure that the
flexible metal pipe does not touch any moving parts and
is not compressed.
! Only use pipes and seals that comply with current
national regulations.
Checking the tightness of the connection
! When the installation process is complete, check the
pipe fittings for leaks using a soapy solution. Never use a
flame.
• Adjusting the burners’ primary air :
Does not require adjusting.
! Should the gas pressure used be different (or vary
slightly) from the recommended pressure, a suitable
pressure regulator must be fitted to the inlet pipe (in order
to comply with current national regulations).
Table 1 Naturale Gas
Nominal (mbar)
Minimum (mbar)
Maximum (mbar)
20
17
25
Fast (R)
Semi Fast (S)
Auxiliary (A)
Supply pressures
Burner
Diameter
(mm)
Thermal Power
kW (p.c.s.*)
157
132
110
3.00
1.90
1.00
Nomin. Reduc.
1.00
0.80
0.50
Nozzle
1/100
Flow*
l/h
(mm)
125
100
72
286
157
95
Burner and nozzle specifications
* At 15°C and 1013 mbar-dry gas
Natural P.C.S. = 37.78 MJ/m³
A
S
RS
A A
R
S
S
PK 755 D GH X/HA
PKQ 755 D GH /HA
PK 644 D GH X/HA
PKQ 644 D GH /HA