Manual De Dietrich INISOL - UNO-2 400 (page 10 of 20) (English)

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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

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De Dietrich INISOL - UNO-2 400 Manual

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