Kostrzewa Platinum Bio ecoMAX860P3-O TOUCH Manuel D'instruction page 84

15. Service settings
84
15.2 Boiler
Return protection
4D return protection
Return hysteresis
Minimum return temperature
Valve closing
Select thermostat
Maximum boiler temp.
Hysteresis
Pump disabled by thermostat
15.3 CH and DHW
Central heating pump start temperature
CO pump idle time during DHW charging
CH pump idle time by thermostat
CH operation time by thermostat
Min. DHW temp.
Max. DHW temp.
Heating and ventilation
Boiler settings
Parameter enables/disables boiler return protection with a mixing valve with electric actuator. The valve is closed,
if the return temperature is too low. Note: do not enable, if the valve is not fitted with electric actuator.
Electric actuator will restore normal operation at return temperature > min. return temperature + return
hysteresis.
Boiler return temperature, below which the electric actuator will close the mixing valve.
The valve restores normal operation when the return temperature increases.
Indicates % of mixing valve opening with active return protection enabled. Set the value which will result in an
increase in return temperature. Note: return protection will be activated, if the boiler temperature setting is high
enough. Otherwise, it will cause actuator to cycle frequently. Note: the valve closes with +-1% accuracy.
Select thermostat
Maximum boiler temperature setpoint available in the user menu and maximum temperature automatically set by
the controller, e.g. by outdoor temperature compensator, etc.
If the boiler temperature decreases below the boiler temperature setpoint by hysteresis,
the burner starts automatically.
• NO - room thermostat shutdown the boiler (set correct room thermostat),
• YES - room thermostat does not shutdown the boiler and the boiler pump is deactivated after
the room thermostat contacts are open.
CH and DHW settings
Parameter determines temperature, at which CH boiler pump is activated. It protects the boiler against
condensation due to the cooling with cold water returning from the system. Note: deactivating the boiler pump
does not guarantee boiler protection against condensation and corrosion. Use additional protection device, e.g.
four-way valve or threeway thermostatic valve.
Available with DHW sensor installed. Prolonged DHW storage tank charging with DHW priority function enabled
may lead to excessive CH system cooling, since CH pump is disabled. CH pump idle time during DHW charging
prevents it by periodical activation of CH pump during DHW storage tank charging. CH pump is activated after the
idle time elapses for a programmed time of 30 seconds.
If the temperature in a heated room is reached (room thermostat tripped), CH pump is stopped for CH pump idle
time by thermostat and is activated for CH operation time from thermostat. Note: for CH pump to be stopped by
the room thermostat, the following conditions must be met: Select boiler room thermostat * Enabled or Pump
disabled by thermostat = YES.
Available with DHW sensor installed. This parameter does not allow users to set DHW
temperature setpoint below a specified minimum value.
Available with DHW sensor installed. This parameter determines a maximum temperature DHW storage tank is
heated to when removing the excessive heat from the boiler in the event of alarm. It is a very important parameter,
and setting the value too high will result in a risk of scalding. Setting the value too low will result in no heat being
transferred to DHW storage tank in case of boiler overheating. Allow for a possible controller failure when
designing the domestic hot water system. Due to the controller failure, water in domestic hot water
system may heat to a hazardous temperature with a risk of scalding.
Use additional thermostatic valves as a mean of protection.
Platinum Bio ecoMAX 860P User Manual – EN 07.22