Heatrae Sadia ElectroMax User Instructions page 3

approximately 2 to 3 minutes whilst the
boiler undergoes a series of self diagnostic
tests. When the indicator glows steady
green it indicates that the boiler is heating.
When flashing RED at the same time as the
ALARM indicator it indicates that there has
been an over-heat fault on the system.
HEAT
This indicator will illuminate GREEN as the
boiler produces heat. It will show the degree
of heat being applied, it will only be fully
illuminated when the boiler is on full power
output. As the boiler adjusts its power
output to the heating demand (modulating)
the indicator will alter in intensity.
ALARM
This indicator will flash RED when there
is a problem with the boiler. If flashing
alone there is a water flow problem, if
flashing at the same time as the DEMAND/
OVERHEAT indicator flashes RED there is
an over-heat problem.
The boiler will not operate until the problem
has been rectified and reset. Contact
your installer or Heatrae Sadia Service
Department if a fault ALARM occurs.
Diagram 1 - Radiator Heating model pictured
Hot Water
Hot Water
"Boost On"
"On" Switch
Indicator
Hot Water
"Boost" Switch
FLOW TEMP
This adjuster alters the boiler flow
temperature. It will normally have been set
to its optimum position during installation. At
its minimum position (- fully anticlockwise)
the boiler flow temperature is set at 65
its maximum position ( + fully clockwise) the
boiler flow temperature is set at 80
3.5 Central Heating System Pressure
Gauge
This will show the pressure in the heating
system. The minimum system pressure
should be 1.0 bar. If lower than this figure
the system may have a leak or have
discharged water from the safety valve due
to a fault. This will need to be investigated,
rectified and the system re-pressurised. The
maximum system pressure is 3 bar. If when
heating the indicator needle on the gauge
approaches the 3 bar mark this will indicate
that the system is over-pressurising. The
reason for this should be investigated and
rectified.
In normal operation the system pressure
should be between 1 bar and 2.5 bar.
Any under or over-pressurisation problem
should be investigated by a competent
installer or service engineer.
Central Heating system
Pressure Gauge
Boiler Status
Display
Central / Underfloor Heating
"On" Switch
User's Instructions
C; at
o
C.
o
3