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46 Doc890/3456CV02B
Operating mode (cover closed)
With the cover closed and by using the rotational switch (pos. No. 2) clockwise or anti-clockwise
the boilers’ operating mode can be set.
The operating modes are:
K standby the boiler switched off but frost protection is active
F automatic the boiler can operate in heating or direct hot water mode
t summer mode the boiler will only react to a direct hot water demand
W1 manual, low capacity the boiler will run at low capacity
W2 manual, high capacity the boiler will run at full capacity
Information mode
With the cover open and by turning the rotational switch (Pos. No 5) clockwise or anti-clockwise it
is possible to read out certain information from the boiler management unit.
There are 10 possibilities. An arrow at the bottom of the LCD display will indicate which parameter
has been selected. The following parameters are readable:-
Parameter
P1 actual fl ow temperature
P2 actual direct hot water temperature (if used)
P3 setpoint temperature
P5 actual outside temperature (if used)
P8 temperature at the low velocity header (if used)
P9 actual boiler capacity
P10 only for trained service engineers
Summary of input and output indications (cover open)
Input indications:
H Flame Ionisation detected
SW Water fl ow switch in operating position
DW APS in operating position
RT Boiler enabled by BMS
Bus Data-bus detected
Output indications:
r Power to Main Gas Valve
u Power to Ignitor
s Control signal to fan
Z Power to Primary Boiler Pump
t Power to Primary DHW Pump
Setting the fl ow temperature for Central Heating (cover open)
Only applicable to boilers without weather compensated fl ow temperature or a 0-10 Volt control
signal.
N.B. Only applicable if outside temperature compensation or a 0-10 V signal is not used.
- Open the lid (the arrow at the bottom of the LCD display indicates parameter P1)
- Press the combined Reset/Programming key (pos. 3). The LED will light. Turn the rotary switch
(pos.5) until the desired water fl ow temperature has been reached
- Press the combined Reset/Programming key. The LED will go out
- Close the cover.
N.B. The new temperature setting will only become active once the Reset/Programming key has
been released.
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