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ALDE BOILER
Filling Central Heating FITTED EQUIPMENT
The central heating system is filled with HTF The boiler is set to an upper limit temperature
through the expansion tank, either by hand, or of 85°C, i.e., the temperature of the heat
using the Alde service pump. Any containers transfer fluid (HTF) as it circulates around the
used for handling or storing the HTF should pipes, radiators, convectors, et al.
be checked first, and must be visibly clean
to avoid introducing contaminants or foreign To ensure the best performance from hydronic
objects into the system. heating, air must be able to circulate freely
around the back of the furniture (Fig 3). Air
Alde recommends using the Alde 1900-811 or vents, cut into the top and bottom of the
839 twin-motor service pump to fill the system. furniture must be unobstructed by carpets,
cushions, or stowage, etc.
To fill the system by hand, unscrew the
expansion tank cap (Fig 2 [R]), and lift the The full length of a convector should be
circulation pump (Fig 2 [S]) out of the tank ventilated for best performance.
(if applicable). Carefully pour the HTF into the
tank, and repeat until the fluid level is about 1 Note: Use gas and electric heating
cm above the MIN mark when cold. simultaneously for the best performance.
The boiler will only use as much energy as is
Figure 2 needed, and is 93% efficient on a SEBDUK
based test.
Quick heat up
While taking energy consumption and the
environment into account, consider switching
the Alde appliance ON when room or space
heating is not required, but may be needed
in the near future. This ensures the appliance
is held at the same temperature as the hot
water setting chosen, and this can reduce the
time taken to warm the living area, when room
heating is then selected.
Figure 3
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