Instructions for the installer
19
6 - Remove the o-ring from gas valve.
nozzle
7 - Remove the current gas nozzle than install the right gas
nozzle including the enclosed O-ring for the type of gas
supply.
G20 nozzle diameter : 7.7 mm
G25 nozzle diameter : 9.5 mm
G30 butane/G31 propane nozzle diameter : 5.5 mm
***Lower calorific powers at 15°C, 1013mbar:
3
N.Gas G20 : Hi = 34,02 MJ/m
3
N.Gas G25 : Hi = 29,25 MJ/m
3
Butane G30 : Hi = 116,09 MJ/m
3
Propane G31 : Hi = 88,0 MJ/m
WARNING:
Please contact with Gassero services for nozzle types.
Gas conversions must done by authorized qualified
service technicians.
4.5 FLUE INSTALLATION INSTRUCTIONS
The flue and the fitting to the flue must be made in
compliance with the standards and the legislation in
force, as well as with local regulations.
The pipes used must be rigid and resistant to
temperature, condensate and mechanical stress,
and airtight.
Non-insulated flues are potential sources of danger.
IMPORTANT INFORMATION
If the lowest part of the terminal is less than 2 metres above the
level of the ground, balcony, flat roof or place to which any
person has access, the terminal must be protected by a guard.
The flue assembly shall be so placed or shielded as to prevent
ignition or damage to any part of the building. The flue outlet
duct and the terminal of the boiler MUST NOT be closer than
to combustible material.
It is very important to ensure, that products of
combustion discharging from the terminal cannot
re-enter the building or any other adjacent building.
Through ventilators, windows, doors, other sources
of natural air infiltration, or forced ventilation / air-
conditioning. If this could occur the appliance MUST
be turned off, and signed as unsafe until corrective
action can be taken.
Model
Q min. max. min. max. min.
CO
2
%
10,6 11,1 10,6 11,1 10,7
Gas Flow
Rate
(m
3
/h)
0,3 1,2 0,3 1,5 0,47
Fan Speed
(rpm)
1200 4750 1200 5750 1350
Flue Gas
Mass
(g/sec.)
3,5 16,6 3,5 20,2
Nozzle
Diameter
(mm)
G30
Wal lcon 42 Wal lcon 50
5,5
max.
11,1
2,0
5900
6,5 26,5
Wal lcon 67
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