Baxi Duo-tec - 18 Positioning the Electrodes; 16 Adjustment and Safety Devices

7733595 (01-05/19) 40
I N S TA L L E R S e c t i o n ( e n )
16. ADJUSTMENT AND SAFETY DEVICES
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• Limit thermostat
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circuit overheats.
It is forbidden to disable this safety device
• NTC fumes sensor
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heating.
It is forbidden to disable this safety device
• Flame ionisation detector
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these conditions, the boiler blocks.
• Hydraulic pressure switch
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• Pump post-circulation
The electronically-controlled pump post-circulation function lasts 3 minutes and is enabled, in the heating mode, if the ambient
thermostat causes the main burner to go out.
• Antifreeze device
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• Anti-block pump function
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operate for 10 seconds.
• Three-way valve anti-blockage function
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• Hydraulic safety valve (heating circuit)
This device is set to 3 bar and is used for the heating circuit. Connect the safety valve to a drain trap. Do not use it to drain the
heating circuit.
• Heating pump pre-circulation
In case of a heat demand in the heating mode, the appliance can pre-circulate the pump before the burner is ignited. This pre-
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17. PUMP CAPACITY/ HEAD
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KEY TO PUMP CHARTS - “SECTION” E
Q RATE OF FLOW
H HEAD
18. POSITIONING THE ELECTRODES
6HHWKH¿JXUHLQ"SECTION" F at the end of this manual.