Centrometal EKO-CK P 30 Uso e manutenzione - Pagina 13
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heater works until flame appears and control unit starts monitoring operation of the photo-cell. If photo-
cell detects flame within the safety time (12 min.), heater will work for another 60 seconds and then it
turns off.
After photo-cell has detected flame, control unit checks for 10 seconds whether flame is stabilized and
turns on indication
flame is running.
8.2 Transition phase
After pellets blaze up, transition phase of the burner operation starts wherein the burner output is
increasing gradually to the set power. During that period proper basis for further pellet combustion is
being prepared.
8.3 Operating phase
After transition phase ends, the burner starts to work at set parameters (set output).
Operation in winter regime
Control unit monitors boiler temperature and, if necessary for heating (or room thermostat gives such
instruction to the pump) and sanitary water, boiler temperature reached 61
sanitary water pump turn on (if sanitary water is enabled). If boiler temperature drops below 59
pumps turn off (regardless the needs). When the boiler reaches temperature of T
reduces the burner output for 2 stages (e.g. from P6 to P4), and if temperature continues to rise and
reaches temperature T
P4 to P2) and, when the boiler reaches temperature of T
the boiler reached T
set
returns to set output and, when boiler reaches temperature T
output by 2 stages. If in that operating regime boiler does not reach temperature T
the burner resumes to set output and at temperature T
procedure. The burner re-ignites when the boiler temperature drops below T
Operation in summer regime
a) With sanitary water tank (next to the tank)
If we wish to use boiler for heating of sanitary water only, either in stand alone or wall mounted
sanitary water tank and not to turn on the heating pump, summer regime must be turned on, sanitary
water sensor must be connected (to connector 4 at the control unit box) and programme Pr02 must be
enabled (On). In programme Pr02 preferred sanitary water temperature is set (40
boiler temperature T
set
0
always 65
C). Hysteresis of sanitary pump operation is fixed, factory set to 5
always turns on at boiler temperature of min. 61
to the set operation regime until it reaches T
burner output by 2 stages and, if temperature continues to rise and reaches temperature T
0
0
C – 2
+ 10
C, it reduces again the burner output by 2 stages and, when the boiler reaches
temperature T
preferred sanitary
0
0
C – 4
10
C but it cannot reach temperature T
resumes to the set output and, when the boiler reaches temperature T
control unit reduces the burner output by 2 stages.
If in that operating regime boiler does not reach temperature T
burner resumes to set output and at temperature T
extinction procedure. The burner re-ignites when the boiler temperature drops below T
0
0
10
C - 5
C.
for presence of flame in the burner. Since that moment time required for good
:
0
—2
C, control unit will again reduce the burner output by 2 stages (e.g. from
set
0
- 4
C, but it cannot reach temperature T
:
is determined according to T
preferred sanitary
0
+ 10
C burner starts extinction phase. If the boiler reaches T
Technical instructions Cm Pelet-set
, the burner starts extinction procedure. If
set
—2
set
0
—2
C, control unit will reduce burner
set
the burner the burner starts extinction
set
+ 10
preferred sanitary
0
C and turns off at 59
0
0
C – 4
+ 10
0
C – 2
+ 10
preferred sanitary
preferred sanitary
+ 10
preferred sanitary
0
C, heating pumps and
0
- 4
C, control unit
set
0
C within 3 minutes the burner
within 2 minutes,
set
0
- 5
C.
set
0
0
C to 80
C) and set
0
C (min. boiler temperature is
0
C. Sanitary water pump
0
C. The burner works according
C when control unit reduces the
preferred sanitary
preferred sanitary
0
C within 3 minutes, the burner
+ 10
preferred sanitary
0
+ 10
C within 2 minutes, the
0
C the burner the burner starts
preferred sanitary
0
C,
+
0
0
C – 2
C
+
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