18
924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER
22. ELECTRONIC BOARD CALIBRATION
When the jumper or the switch is in the OFF position
(g. 15a):
MET operation of the boiler with NATURAL gas
T.Risc boiler heating temperature range 30 - 85°C
T-off 150-seconds heating stand-by time
When the jumper or the switch is in the
ON position
(g. 15b):
GPL operation of the boiler with LPG
T.Risc boiler heating temperature range 30 - 45°C
T-off 30-seconds heating stand-by time
0503_0912/CG16450503_0913/CG1645
Figure 15b
Figure 15a
NB. Make sure that electrical power supply has been disconnected before making settings.
23. POSITIONING OF THE IGNITION AND FLAME SENSING ELECTRODE
Figure 16
9912070100
The boiler has two connection points specically designed to allow technicians to measure the combustion efciency after
installation and ensure that the combustion products do not constitute a health risk.
One connection point is connected to the ue gas discharge circuit, and allows monitoring of the quality of the combustion
products and the combustion efciency.
The other is connected to the combustion air intake circuit, allowing checking of any recycling of the combustion products
in case of coaxial pipelines.
The following parameters can be measured at the connection point on the ue gas circuit:
• temperature of the combustion products;
• oxygen (O
2
) or carbon dioxide (CO
2
) concentration;
• carbon monoxide (CO) concentration.
The combustion air temperature must be measured at the connection point on the air intake circuit, inserting the measurement
probe to a depth of about 3 cm.
The boiler has two connection points specically designed to allow technicians to measure the combustion efciency after
installation and ensure that the combustion products do not constitute a health risk.
One connection point is connected to the ue gas discharge circuit, and allows monitoring of the quality of the combustion
products and the combustion efciency.
The other is connected to the combustion air intake circuit, allowing checking of any recycling of the combustion products
in case of coaxial pipelines.
24. CHECK OF COMBUSTION PARAMETERS
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