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Hitachi PC-ARFH1E Betriebshandbuch Und Installationsanleitung Seite 62

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1.8.2.8 Heat Pump configuration
Water pump configuration:
Configure the water pump of
the heat pump.
See detailed information in
the next page.
Night shift:
Reduces compressor load in
order to reduce environmental
noise, preferably at night.
See detailed information in the
next page.
PMEN0602 rev.0 - 05/2023
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Outdoor average temperature:
OTC average is used to neutralise the effect of
occasional temperature variations.
The average value of outdoor temperature
sampled over a selected period (between 1 and
24 hours) is used for the calculation of weather-
dependent set point temperature.
Minimum ON time: In order to reduce a
possible compressor damage, demand ON cycles
can be reduced by determining the time that
must pass before accepting new Demand OFF.
Minimum OFF time: In order to reduce a
possible compressor damage, demand OFF
cycles can be reduced by determining the time
that must pass before accepting new Demand
ON.
Seizure protection: The pump seizure
protection function prevents sticking
of components due to long periods of
inactivity, by running the components
during a short period every week. Mixing
valves and pumps are fully opened and
then fully closed (time depends on Mixing
valve Run Time Factor).
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