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BOILER PROTECTION DEVICES
Anti-frost Device.
The anti-frost function acts on the central heating ow tempe-
rature probe, independently from other regulations, when the
electrical supply is turned on.
If the primary circuit temperature is between 3°C and 8°C the
pump will run (with the diverter valve switching between cen-
tral heating and hot water every 1 minute) until the temperature
reaches > 9°C.
If the ow temperature remains between 3°C and 8°C the pump
will continue to run for a maximum of 20 minutes unless a tem-
perature above > 9°C is detected in the central heating ow, af-
ter this the the burner will re (heating position) until a tempera-
ture of > 30°C is detected.
If the central heating ow temperature is < 3°C, the burner will
re (heating position) at minimum power until the temperature
reaches > 35°C, the burner will go out.
If lockout is caused by overheat the burner will not re but the
pump will continue to run (heating position).
The anti-frost device activates only when (with the boiler opera-
ting correctly):
- the system pressure is correct;
- the boiler is electrically powered;
- there is a supply of gas.
Ignition and Detecion
5 01
No ame detected
5 02
Flame detected with gas valve closed
5 04
Flame lift
5 P1
1st Ignition Failed
5 P2
2nd Ignition Failed
5 P3
Flame cut-off
Air Inlet / Flue gas outlet
6 10
Overheat (Main heat exchanger)
6 12
Insufcient fan speed
Multi-zone Heating (Heating Zone Modules - optional)
7 01
Zone 1 send sensor defective
7 02
Zone 2 send sensor defective
7 03
Zone 3 send sensor defective
7 11
Zone 1 return sensor defective
7 12
Zone 2 return sensor defective
7 13
Zone 3 return sensor defective
7 22
Zone 2 overheating
7 23
Zone 3 overheating
7 50
All Heating Zones locked
39


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