25
Instructions for the user
1.14.5 Anti-seize function
If the boiler remains inactive and connected to the power mains, the circulation pump and the deviating valve will be shortly enabled every
24 hours so as to avoid any shut-down.
The same applies to the relay which can be freely programmed whenever this latter is used to power a recirculation pump or a deviating valve,
to the solar plant circulation pump and to the deviating valve for thermal discharge (M version).
On models with high- and low-temperature outlet (V, MV, Z, MZ versions) the high- and low-temperature zone pumps and the mixing valves
are equipped with an anti-shutdown function.
1.14.6 Water heater anti-legionella function
Every 15 days the anti-legionella function is enabled. It gets the water heater temperature to 65 °C for 30 minutes, regardless of any other
setting, in order to prevent or remove possible proliferation of bacteria inside the water heater
1.14.7 Collector heat transfer function
This function prevents that solar collectors in stagnation state are exposed to high thermal stresses.
With the boiler in SUMMER, WINTER or CH ONLY mode, if the temperature read by solar collector probe is between 110°C and 115°C (editable
with parameter
P22
) and the temperature measured by the solar water heater probe is below 93 °C, solar pump is enabled to ill water heater.
Solar pump operation is disabled as soon as solar collector temperature goes below 108 °C or solar water heater probe detects a temperature
above 95°C.
1.14.8 Thermal discharge function (M versions only)
With boiler in SUMMER, WINTER or CH ONLY mode and parameter
P76
=1, if the temperature measured by the solar collector probe is over 110
°C and at the same time the temperature measured by the boiler water heater probe is over 95 °C, the deviating valve for thermal discharge is
switched to the thermal discharge position, and the solar pump is activated. The function stops when the collector temperature drops below
108 °C. If the boiler water heater temperature probe is faulty, the function is not activated. Moreover, thermal discharge is disabled when the
collector temperature is over 120 °C.
1.14.9 Water heater cooling function
This function consists in cooling water heater down to the set-point value set by the user (parameter
P19
) by transferring excess heat from the
water heater to the solar collector.
With the boiler in SUMMER, WINTER or CH ONLY mode, if water heater temperature is 2°C higher than set-point temperature (parameter
P19
)
and collector probe temperature is 6°C lower than solar water heater probe temperature (editable with parameter
P20
), solar pump is enabled
to cool water heater. Function is interrupted as soon as water heater temperature reaches the set-point value set by the user, or when solar
collector probe temperature is 3°C lower than solar water heater probe temperature (editable with parameter
P21
). Function can be disabled
with parameter
P26
(
P26
= 1 enabled;
P26
= 0 disabled).
1.14.10 Solar mode operation and failure signal
When solar pump is active, symbol
appears on the display. If solar collector probe or solar water heater probe are faulty, error codes
E24
and
E28
will be displayed, respectively. Solar pump will be turned of.
Содержание MADEIRA SOLAR KRBS 12
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