Metal-Fach ecoMAX860P TOUCH, Operating Manual, Page: 37 / 44

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Max. HUW temperature
It requires a HUW sensor to be plugged in. This parameter decides on
which maximum temperature will the HUW container be heated during
dropping down excessive heat in alarm states. It is a crucial parameter
because setting this for too high value can lead to the risk of users
scalding with utility water. On the other hand, too low value of this
parameter can lead to a situation, when during boiler overheating there
will be no possibility to drop down excessive heat into the HUW tank.
When projecting the HUW installation, there should be an assumption of
controller malfunction. This situation can lead to dangerous level of HUW
temperature, leading to user scalding. It is advised to use additional
security precautions in form of thermostatic values.
Increase boiler temp. from HUW
and Mixer
This parameter determines the increase of the set boiler temperature in
order to load the HUW tank, buffer, and the mixer circuit. The
temperature is only increased when there is a need to do so. When the
set temperature of the boiler is on a satisfactory level, the regulator will
not change it in order to load the HUW tank, buffer, or mixer circuit. The
increase of the set boiler temperature for the period of loading the HUW
tank is signalled with the letter “C” in the main window of the display.
HUW operation extension
Available after connecting a HUW sensor. When the HUW tank is fully
loaded and the HUW pump is switched off, the boiler may be in danger
of overheating. This occurs when the set HUW temperature is higher
than the set boiler temperature. The problem is particularly prominent
when the HUW pump works in “SUMMER” mode and the CH pump is
deactivated. In order to cool the boiler down, the HUW pump operation
can be extended by the
HUW operation extension time value.
Circulation pump standstill time
It is the time between periods of circulation pump operation and it is
defined by the parameter
circulation standstill time (recommended
setting is between 15-40 min.) The circulation pump is operating in
cycles for the time of
circulation operation time (recommended setting is
between 60 and 120s.)
Circulation pump operation time
CH pump working mode
Available options: OFF = no support boiler pump; ON = boiler pump
works normally; shunt pump = boiler pump works as shunt pump; heat
exchanger = boiler pump works continuously in a short circuit boiler -
exchanger.
CH pump standstill time by
thermostat
When the temperature of the heated rooms is reached (the contact of
the room thermostat is open), the CH pump is stopped for the
CH pump
standstill time from the thermostat , after which the CH pump operation
time from the thermostat is activated. Note: The following conditions
must be met in order to stop the pump via the room thermostat:
Boiler room thermostat selection
≠ deactivated
Pump Off by thermostat = YES
CH pump activation time by
thermostat
Circulation pump starting
temperature
The temperature at which the circulation pump is activated.
14.4 BUFFER
Buffer support
This parameter is used to turn on operation with the buffer. It is
available after connecting an additional B module and buffer
temperature sensors.
Loading start temperature
The parameter Loading start temperature defines the upper buffer
temperature below which the process of buffer loading is being
started. This process will then be finish when the bottom buffer
temperature will reach defined temperature in the parameter
Loading
stop temperature.
Loading stop temperature
Heat start installation
If the top buffer temperature drops below this value, in order to save
electrical power, the mixer pumps and HUW pumps will be
deactivated. This function is particularly useful when working in
GRATE mode.
14.5 MIXER
Mixer support

Off The mixer actuator and pump are not in operation.

CH On
It is being used when a mixing circuit is loading a heat installation of
CH. The maximum mixing circuit temperature is not being limited, the
mixer is fully opened during alarms e.g. with boiler overheating.
Attention: do not use this option when the heat installation is made
with pipes not resistant for high temperatures. In such cases it is
recommended to set the mixer operation for FLOOR switched on.