Push MENU to WINTER position. Set the heating temperature adjustment to the desired setting. Room thermostat will
keep the desired value.
4.4.1 WINTER MODE with OTC (Outside Temperature Control)
It’s activated through the connection of the probe of external temperature and the setting of the parameter (mode of
parameter setting).
The operation is the same of heating mode, with the difference that supply heating temperature is calculated in
combination with the external temperature from the external probe and from the factor K (set between 0 and 6 by mode
of parameter setting).
Below you can see a graph of the OTC function (minimum set point of heating supply temperature = 15°C).
The regulation of the ambient temperature can be made only by compensation of supply temperature with the external
temperature or in combination with the remote control (look at instruction manual of remote control).
The correction of the temperature in of heating supply is made every minute with a function of reduction of the sudden
variations.
In case of breakdown to the probe it expresses the regulation of the temperature supply it is made though pulsating sets
heating with the same functions described in the previous paragraph.
4.5 BREAK DOWN SIGNALS
CODE
DESCRIPTION
01
LOCKOUT due to not ignition/condensate sensor
02
Failure of heating system pressure
1
03
Failure of external sensor
04
Failure of heating sensor
05
Failure of DHW sensor
06
LOCKOUT due to high temperature/exceeding of flue gas temperature
08
Air pressostat failure/flue gas thermostat
09 Not
water
circulation
4.6 TEMPORARILY TURNING BOILER OFF
You can achieve it by means of:
- the room thermostat ;
- the MENU on the instrument panel;
4.7 LONG TERM SHUT DOWN
If the boiler is to remain off for a long period of time, close the gas cock to the boiler. Before start- up, manually turn the
rotating part of the circulator pump in case it froze (slightly stuck) during the down time.
4.8 SUGGESTIONS
Once a year the boiler should be cleaned and checked to make sure that all components are working properly. Do not
adjust the gas valve, this is to be done only by a licensed authorized technician.
If there is a lockout, turn knob to reset position. If the problem happens often, call a licensed authorized technician.
The condensing must not be modify or closed.
After a long period of inactivity verify the presence of water in the condensing trap verifying if after the burner restart, in
10 minutes condensing water start to descharge out of the condensing trap.
If this doesn't happen, please call a center assistance authorized
ARCA srl
.
20
1
Anomaly is visualized and prevented the starting the burner for P < 0,25 bar. The starting of the burner is allowed for P > 0,4 burner
Subsequently to anomaly the burner starts correctly working after the pressure of heating system is corrected. To return to the normal
visualization press the P2 button.
Through parameter P6 is possible to start the burner however even if it foresees anomaly pressure plant, that comes all the same
visualized.
0
- 5
- 1 0
- 1 5
5
1 0
1 5
2 0
K = 3
K = 4
K = 6
se
tp
oi
nt
(
°C
)
E x t e r n a l t e m p e r a t u r e ( ° C )
9 0
8 0
7 0
6 0
5 0
4 0
3 0
2 0
1 0
2 5
- 2 0
- 2 5
K = 2
K = 1
Summary of Contents for PIXEL 25 FC
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