Bedienungsanleitung De Dietrich DIETRISOL TRIO DT 350 (Seite 10 von 24) (Englisch)

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TRIO DT 250 - TRIO DT 350 16/07/2015 - 300028005-001-04

5 solar regulator

Always fitted to installation type 1 (Parameter ANL 1).

See next page (Start-up).

5.1 General description of how the unit operates

In automatic mode, the regulator operates in accordance with the

following principles:

` The sun's irradiation 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 self-calibration phase that follows (adjustment

parameter tu, factory setting: 3 minutes), the solar pump (relay

1) operates at full speed (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.

` When the zonal reversal temperature is reached in the

collectors (adjustment parameter SZ, factory setting 55°C), the

relay R2 switches the reversal valve to the upper zone in the

calorifier. The user therefore has immediate access to domestic

hot water at the set temperature.

` When the zonal reversal temperature is reached (adjustment

parameter SZ, factory setting 55°C), the set reference

temperature difference is lowered from 20 K to 10 K.

` 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 (85°C) is reached in the hot water storage tank. 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.

` The amount of heat transferred from the collectors to the tank

is displayed as parameter AH. The value is cumulative and is

constantly updated.

` The regulator (installation 2- ANL2 with heating back-up)

includes an additional function: A temperature sensor S3 is

located on the heating return.

- If the heating return temperature is equal to or greater than the

temperature of the solar tank, heating return is direct to the boiler.

- If the temperature in the solar tank is higher than the heating

return temperature, heating return passes via the solar tank. The

energy coming from the sun's rays or from a biomass boiler is thus

exploited to heat the home.

Installation 1

Installation 2

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.

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