15
INS
TALLER
U
SER
M
AINTEN
AN
CE
TECHNI
CI
AN
TECHNI
CAL
D
AT
A
R
AF
RC
SC
AC
M
G
V
4
The unit includes:
N°2 - 3/4” telescopic fittings (R-M)
N°1 - 1/2" telescopic fitting (AC)
N°1 - 1/2” gas cock (G)
N°1 - 1/2” ball valve (AF)
N°3 - Ø18 copper bends
N°2 - Ø14 copper bends
N°2 - adjustable expansion bolts
N°2 - boiler support hooks
N°1 - filling knob
Key (Fig. 4):
V
- Electrical connection 230V-50Hz
G
- 1/2” gas supply
SC - Condensate drain
R
- 3/4” system return
M
- 3/4” System flow
RC - 1/2” domestic hot water recirculation (optional)
AC - 1/2” domestic hot water outlet
AF - 1/2” domestic hot water inlet
1.6 GAS CONNECTION
Our boilers are designed to operate with methane gas (G20) LPG and propane air (50% air - 50% propane). Power supply pipes must be the
same as or larger than the boiler fitting.
Before connecting the gas line, carefully clean inside all the fuel feed system pipes to remove any residue that could impair boil-
er efficiency.
Also make sure the gas corresponds to that for which the boiler is prepared (see boiler data nameplate).
If different, the boiler must be converted for operation with the other type of gas (see converting appliance for other gas types).
It is also important to check the dynamic pressure of the mains (methane or LPG) used to sup-
ply the boiler, which must comply with EN 437 and its attachment, as insufficient levels may
reduce generator output and cause discomfort to the user.
Static/dynamic network pressures higher than those required for regular operation may cause
serious damage to the appliance control elements; in this case shut the gas line off.
Do not operate the device.
Have the device checked by experienced personnel.
According to the local regulation in force, make sure that a gas cock is installed upstream of each connection between the ap-
pliance and the gas system. This cock, if supplied by the appliance’s manufacturer, can be directly connected to the appliance
(i.e. downstream from the pipes connecting the system to the appliance), according to the manufacturer’s instructions.
The Immergas connection unit, supplied as an optional kit, also includes the gas cock, whose installation instructions are
provided in the kit.
In any case, make sure the gas cock is connected properly.