PENSOTTI PCH 50B-H, Instruction Manual

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MAINTENANCE INSTRUCTIONS
72
6.10 Function codes
Code Function Description
F07
Flue test function
active
(Chimney-Sweeper)
Pressing ‘ ’ button for 7 seconds the Flue test function is enabled.
Pressing the boiler Off button the function is disabled.
The Flue test function operates the boiler at the maximum heating pressure
for 15 minutes without any modulation. The function is useful for combustion
testing.
F08
Frost Protection
function
(Central heating
circuit) The function is automatically enabled when the heating sensor detects a
temperature of 41 °F. The boiler operates at minimum gas pressure with the
diverter valve in the ‘winter’ position. The function is disabled when the
temperature detected by the sensor reaches 86°F.
F09
Frost Protection
function
(D.H.W circuit)
The function is automatically enabled when the D.H.W sensor detects a
temperature of 40°F. The boiler operates at minimum gas pressure with the
diverter valve in the ‘summer’ position. The function is disabled when the
temperature detected by the sensor is 45°F in the D.H.W circuit or 86°F in
the central heating circuit.
F28
Legionella
Prevention
Function
Function active for storage boilers only. It comes into operation every
7 days.
It brings the hot water temperature of the storage cylinder up to 140°F
whatever temperature value is set for hot water.
F33
System purging
function
The function is automatically enabled at the first ignition of the boiler. The
boiler operates a series of cycles for a period of 5 minutes. Each cycle
consists in: the pump is enabled for 40 seconds and then disabled for 20
seconds. The starting of the boiler is only allowed at the end of this function.
In case of an open contact of the water pressure switch, this function can be
enabled during the normal boiler operation. Once the contact is closed a
purging cycle of 2 minutes is performed.