Protherm Leopard 24 BOV User And Installation Instructions Manual - page 11
10
Anti-freeze protection of the system
The boiler has build-in protection against
freezing water in boiler (no in whole heating
system or DHW pipes). The boiler is always
started if the CH temperature is below 4°C
and works until CH temperature reaches
8°C. This protection is independent on
room thermostat or SUMMER mode (CH
water temperature setting – – )
Pump protection
The pump is automatically switched on for
a short time (approximately 30 sec.) if it
has not been operated for 24 hours – thus
clogging by sludge sedimentation in the
pump’s bearings is prevented.
Anti-cycling function
This function restrict too repeated starts
of boiler to heating system and it is use-
ful especially in smaller heating system,
when required heating power is smaller
than minimal boiler's thermal power output.
Next start is delayed in range from 1min 30
sec to 5 min.
Overheating protection
If the CH temperature is higher than the
pre-set value of 80°C, the pump is always
switched on and continuously operated. If
temperature further increases, safety ther-
mostat shut boiler down, and thermostat
must be unblocked by service centre.
In case water loss the boiler shut down too,
but it will be reactivated automatically when
the pressure increases again.
Disconnected boiler from el. source
Should the boiler be disconnected from the
electricity source for a long time (continu-
ously for one month or longer), it should be
regularly reconnected and switched on (at
least once a month). If the pump is blocked,
always call a specialised service centre.
Repairs of the pump caused by impurities
in the heating system are not covered by
Protective features of the boiler
a higher or a lower value by shifting the
reference temperature – see the section
“Controls and signals – equithermal mode
– reference temperature shift”.
Please note:
If with a decreasing outdoor
temperature the indoor temperature noti-
ceably increases, select a heating curve
of a lower number, and if it decreases,
with a higher number.
Running the Boiler with Equithermal
Control and Room Control Unit
The room control units augments the equi-
thermal control, allowing time setting and
economy heating mode (e.g. at night).
How to set the boiler: • set the equithermal
control as explained above;
• connect the room control unit to the boi-
ler (remove the terminal jumper) and then
set the required temperature during the
comfort period on the control unit to a va-
lue about 5°C higher then the temperature
reached with equithermal control. Set the
required temperature during the economy
period (at night, when absent) on the con-
trol unit to the actually required value – it
must always be at least 3°C lower than
the actual comfort temperature.
Please note:
Room control unit must be
installed by a specialist service organisa-
tion.
Example:
Select curve E5. With the out-
door temperature -10°C, the boiler sup-
plies water to the heating system of about
70°C. If you at the same time select the
P5 reference temperature shift parame-
ter, when the outdoor temperature rises
by 15°C, the boiler should supply water
to the heating system of 38°C. When the
outdoor temperature rises to 18°C, the
heating water heating is turned off.
Heating power setting
Boiler's power factory setting is 15 kW to
heating system. The maximal power 23 kW
is always available for preparing DHW. Only
service centre authorized by manufacturer
can change heating power in accordance
with requirement of heating system.