Operating Mode - REMEHA W40 Installation And Maintenance Instructions Manual

6.4.2 Operating mode

During operation the 'code'-display shows the status
(position in cycle) of the boiler, while the temperature
displays indicates the measured water temperature.
The digits in the 'code'-display have the following mean-
ing:
0 Standby; there is no heat demand from the heating or
hot water controls.
1 Pre-purging; before start-up, the boiler is purged for
0,3 seconds. When the heat demand has been met,
the fan continues to operate for another 10 seconds.
2 Ignition: ignition is activated for 2.4 seconds while the
gas valve is opened.
3 Central heating mode; the boiler operates in the cen-
tral heating mode.
4 D.H.W. operation: the boiler operates when the three-
way valve serving the calorifier is actuated by a
demand from the D.H.W. temperature sensor.
5 Waiting mode; the fan runs and the boiler waits until
this has been proved or waits until the three-way
valve has returned to the central heating position.
7 Continued pump operation in the central heating
mode: after heat demand is met, the pump continues
to operate for the time selected (if continuous pump
operation has not been selected).
8 Continued pump operation in the D.H.W. mode; after
D.H.W. demand is met, the three-way valve will be
energized for another 5 minutes and the pump keeps
running.
9 Control stop
- flow temperature > 95˚C
- flow temperature > setpoint +5˚C
- return temperature > max. flow temp. -10˚C
- rise in flow temperature exceeded.
H Forced full load.
L Forced part load.
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remeha W40/60-m ECO