Savin SDC306 Instruções de Operação descarregar pdf (Página 26)

Installation and Operating Instructions

SDC 306 1316BED036-11B-E Date 06/09

- 26 -

10

C

ONTROLLER FUNCTIONS

The SDC 306 controllers include

comprehensive functions for controlling and

monitoring the solar thermal system. A

basic distinction is made between:

• Control functions for loading the storage

cylinder

• Functions for system protection and

system monitoring

• Additional functions

10.1 General control functions

The control unit records the temperatures

from the various measuring points and

calculates the correct time to load the

storage cylinders, based on the

programmed (additional) functions and

control parameters.

To

prevent the pump from switching on and

off due to only minimal differences in

temperature, a switch-on hysteresis, e.g. 7K

and switch-off hysteresis, e.g. 3K is preset

.

.

10.1.1 Load storage cylinder

Relevant values in menu

“Program”

Maximum temperature

Td start

Switch-on temperature difference

Td stop

Switch-off temperature difference

The storage cylinder is loaded to the

specified maximum temperature via the

pump on output A1, provided the collector

temperature is a certain amount higher than

that of the storage cylinder temperature.

The switching behaviour can be set via Td

start and Td stop, whereby the value for Td

start cannot be lower than that for Td stop +

1. To prevent the pump from switching on

and off due to only minimal differences in

temperature, a hysteresis of 5K is preset as

the storage cylinder maximum temperature.

Load cylinder

(base of cylinder

unten)

Max

65 °C

T[°C]

Pump on

(A1)

A1

On

Off

TColl

TSt

dT start

dT stop

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