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Installat
ion and User Instructions R01128
-8 09/15
Page
51
Operation
10.2 Operation
Once the system has been fully
commissioned, no user intervention
should be required to fully enjoy the
comfort and benefits of the unvented
hot water cylinder.
The hot water temperature can be set
to various requirements. For operation
with a solar system it is recommended
to set the auxiliary hot water
temperature to between 45°C and 55°C
(this is between 2 and 3 on the dial,
please refer to Figure 19 for
approximate settings). Higher
temperatures can cause tripping of the
high limit thermostat, introduce more
heat loss from the unit and increase
the risk of scalding significantly.
The solar thermostat should be set to
the highest temperature possible to
maximise solar gains. However, safety
(scalding) and limescale build up have
to be considered.
When turning on a hot tap for the first
time after a heat up period there might
be a short surge of water. This is
normal in unvented systems and does
not constitute a fault. Sometimes the
water may appear milky – this is due
to very fine air bubbles in the water
which will clear quickly.
10.2.1 Water temperature
direct electric heating
Before removing the cover
from the immersion heater
isolate appliance using
isolating switch! Danger of
electrical shock! Only use
suitable electrically insulated
equipment when working
inside immersion housing.
The hot water temperature achieved by
the direct electric heating element can
be adjusted by removing the cover
from the immersion heater and
adjusting the dial up or down as
indicated in Figure 18.
Figure 18: Adjustment water temperature direct electric heating element
Dial to adjust water
temperature
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