DE DIETRICH INISOL UNO-2 …, UNO-1 … - Manual (Page 10)

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UNO/2 200, 300, 400, 500 - UNO/1 200, 300, 400, 500 06/02/12 - 300024525-001-B
5 Diemasol A solar regulator
5.1 General description of how the unit operates
In automatic mode, the Diemasol A regulator operates in accordance
with the following principles:
`
The sun's rays heat the transfer fluid in the collector. For the
regulation process to be triggered, a minimum temperature of
30 °C is required in the collector and there must be a
temperature difference of 10 K by comparison with the tank.
` During the AUTO-calibration stage which follows (tu parameter
setting tu, factory setting 1 minute) the PUMPE (relay) operates
to its full extent (100%).
` Subsequently, the solar pump regime is calculated dynamically
depending on a difference between the reference temperature
(parameter DT, factory setting 20 K) and the calorifier
temperature.
` Depending on the heat available, the system heats up the solar
tank and cuts off when the tank storage temperature is reached
(adjustment parameter SX, factory setting: 60 °C).
` When the temperature in the collectors reaches the maximum
value (adjustment parameter CX, factory setting 100°C), the
solar pump is triggered to cool the collectors. The pump
continues to operate until the temperature in the collectors is
lower than 5 K at parameter CX and/or the maximum storage
temperature (80°C) is reached in the hot water storage tank.
Regulation goes into cooling mode if the preparer tank
temperature is exceeded. As soon as the temperature in the
collectors drops below the temperature in the calorifier, the
calorifier is cooled down to its set temperature. The installation
is thus protected against overheating and repeated stoppages,
allowing thus the prolonged absence of the user even in the
summer period.
5.2 Start-up
 %
If the temperature in the solar collectors is higher
than 130°C, the control system operates in safety mode.
Wait until the evening before start-up or cool down (cover)
the solar collectors.
Switch on the device. The regulator starts an initialisation phase
during which the LED flashes red and green. When initialisation is
complete, the regulator changes to automatic mode. The factory
settings for this mode give optimum performance with most
installations.
If special conditions make it necessary to change the settings, the
corresponding adjustment parameters can be reset.
M000392
M000391