3.0 Operating the Boiler
7
3.5
Air Flow Monitor
1. The boiler is fitted with an air pressure sensing
device. This monitors the flue system.
2. If the neon illuminates ( ) it indicates that
the flue or flue terminal is blocked or obstructed in
some way, or that there is an internal fault. If there
is no external blockage of the flue terminal that
can be easily removed contact your Service
Engineer (Fig. 12).
3.6
Pump Fault or Low Pressure
1. The neon ( ) will illuminate if the circulating
pump is faulty or the system pressure drops
below the minimum requirement (Fig. 12).
2. Check the pressure gauge as described in
Section 3.9. If the pressure is in the normal range,
a pump fault is indicated. Contact your Service
Engineer to determine the nature of the fault.
3.7
Sensor Fault
1. When the ( ) or ( ) neon is illuminated a
fault on the hot water or central heating
temperature sensor is indicated (Fig. 12). Contact
your Service Engineer.
3.8
Pump Protection
1. With the selector switch in either Position (i) or
Position (ii) (Figs. 13 & 14) the pump will
automatically operate for 1 minute in every 24
hours to prevent sticking.
30
°
40
°
50
°
60
°
70
°
80
°
Air Flow
Monitor Neon
Pump/Low
Pressure Neon
Sensor Fault
Neons
Fig. 12
Fig. 13
Fig. 14
Supplied by HeatingSpares247.com
