Low Flow / Water Protection; Pressure Switch; High Limit Temperature Protection - REMEHA Avanta 24c Installation And Service Manual

Remeha Avanta Plus
127768-271011
8. Technical specifications and working principle
8.3.4

Low flow / water protection

The Remeha Avanta Plus has a low-water protection based on
temperature readings. By modulating down as soon as there
is a risk of an insufficient water flow, the boiler will keep work-
ing for as long as possible. An insufficient water flow, however
caused, - indicated by a flow/return ΔT ≥ 45°C or a rate of
rise in the flow temperature > 1°C/sec – will be sensed by
the 'abc control which will shut the boiler down in a blocking
®'
mode with the display showing (code 9) for 10 minutes and
before re-starting.
If there is no water in the boiler or if the pump is not running, it
will go to lock out (code e7) and require manual re-set.

Where Low Flow Taps or Fittings are intended to be used in
DHW systems connected to Remeha Combination Boilers it is
strongly recommended that the DHW flow rate DOES NOT fall
below 2.5 l/min to ensure reliable operation.
8.3.5

Pressure switch

The Remeha Avanta Plus has a pressure switch. Error code
e9 is displayed when pressure is bellow 0.6 bar. When the
central heating system has been refilled, the boiler has to be
reset manually.
8.3.6

High Limit temperature protection

If the flow temperature exceeds 110°C the high limit tempe-
rature protection device switches off the boiler in a lock out
mode with the display showing (code e1) This mode will
require a manual re-set.
When the fault is corrected, the boiler can be restarted by
pressing the [reset]-key on the control panel and holding for 3
seconds.
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