Centrometal EKO-CK P 20 Використання та обслуговування - Сторінка 14
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Technical instructions Cm Pelet-set
Operation in summer regime
:
b) With a boiler with sanitary hot water heater inside the boiler water
If we wish to use boiler only for heating of sanitary water in the sanitary hot water heater in the boiler
water, and not to turn on heating pump (and sanitary water pump – which, in this case, is not needed),
summer regime must be turned on without connected sanitary water sensor. Programme Pr02 must
be turned off (OFF). Sanitary water temperature is set by boiler temperature (i.e. sanitary water
temperature well be equal to boiler water temperature). The burner works under winter regime, except
heating pump and sanitary water pump do not turn on.
8.4 Extinction phase
After reaching set temperature of the boiler, the burner starts extinction phase – in manual operation it
is done by pressing ON/OFF button, in automatic extinction it is done in accordance with set activating
times and when errors E4, E5 and E6 occur.
In the beginning of extinction phase, pellet feeding is stopped, OFF appears in the lower display, and
current boiler temperature appears in the upper display, fan works all the time the flame in burner is
detected by the photo-cell (or max. 180 seconds). After that fan work for another 120 second to blow
off the grate and prepare it for next firing.
8.5 Operation with timer
Control unit can automatically switch on and off the burner according to set weekly and daily
programmes. Precondition for proper functioning of the burner with timer is correctly set current time
and day of a week.
Three turns on and three turns off can be planned per day of a week. All activating times are factory
set to off. For turning on of activating time see Setting of the burner operating parameters. For proper
and efficient burner operation minimum burner work time is 1 hour, and min. stand-by time between
two activating times is 1 minute.
8.6 Frost protection programme, allowed to use only if the room thermostat is connected
If we want to maintain minimum temperature (+5°C) in the boiler and sanitary water tank (if Pr02 is
On) and minimum room temperature set at the room thermostat connected to the control unit, Pr02
programme has to be set to On. Main switch of the control unit must be in on mode, and control unit
has to be in OFF mode (switched off).
The room thermostat must be connected to the control unit and set to minimum.
The burner turns on if the boiler temperature and/or sanitary water tank is below +5°C and/or an pulse
is below 65°C, respectively. The burner turns off when the
is given by the room thermostat, and T
boiler
set boiler temperature is reached. The burner turns on again when the boiler and/or sanitary water
tank temperature is below +5°C and/or an pulse is given by the room thermostat and
is below 65°C, respectively. Heating pump turns on when a pulse is given by the room
T
boiler
0
< 65°C, and
thermostat at T
> 61
C or due to safety reasons (boiler overheating). If boiler T
boiler
boiler
thermostat send a pulse, the control unit will turn on the burner and heat the boiler to T
. If Pr07
set
programme is turned on (On), and boiler is OFF, Pr07 and OFF appear alternately in the upper display
and current time and current boiler temperature are displayed in the lower display.
8.7 Boiler overheating protection
The control unit has a built-in protection which protects boiler against overheating. Regardless the
operating regime (either winter or summer) and regardless the needs, the control unit turns on
circulation pumps to cool the boiler.
In winter and summer regimes, if the boiler temperature exceeds 93°C, and regardless heating or
sanitary water is needed, the boiler pump and/or sanitary water pump turns on and works until the
boiler temperature drops below 93°C.
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