Savin SDC306 Instrucciones de operaciones descargar pdf (Pagina 29)

Installation and Operating Instructions

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

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10.1.12 Priority switching

The solar circuit has priority for loading the

storage cylinder. If the temperature in the

solar circuit is too low or if the maximum

temperature of the storage cylinder is

reached, the system switches to the

swimming pool circuit/secondary circuit. An

increase in temperature of the collector is

monitored. If, within 5 minutes, the collector

temperature has risen by more than 1K, the

control unit shuts off the secondary loading

and blocks off the latter for a period of 4

minutes. During this period, the control unit

waits for the switch-on condition for the

priority loading. Once this period has

elapsed or if the control unit has reverted to

priority load status, the block against

secondary loading is lifted. After no longer

than one hour of swimming pool

heating/secondary storage cylinder heating,

this is interrupted and the switch-on

conditions for the priority storage cylinder

are checked for a period of 4 minutes.

10.1.13 Impulse-controlled circulation

The circulation pump can be controlled as

per demand. Shortly before hot water is

removed from the system, a request for

heat is sent to the control unit by means of

a button or by briefly opening the hot water

tap (min. 1 s). The circulation switch is used

to start the circulation pump for an

adjustable time. Once this active period has

elapsed, the pump is then blocked from

being reactivated for a certain (adjustable)

period.

10.1.14 Thermal

circulation

In the case of thermal circulation, the

potable water supply is held at a preset

minimum temperature (thermostatic

function) within two adjustable timeframes.

To prevent the pump from switching on and

off due to only minimal differences in

temperature, a hysteresis of 5K is preset.

10.1.15 Anti-Legionnaire’s disease function

A check is made at regular intervals (every

day, every week) as to whether the water in

the storage cylinder was at 60°C for at least

one hour in this period. If not, then between

16 and 18:00 hours, the system attempts to

heat the water in the storage cylinder to

65°C and to maintain it at a temperature of

60°C. If the water in the storage cylinder

does not reach this temperature within

these two hours or if, within the space of an

hour, the temperature falls again to below

60°C, an error is reported. However, the

control functions are retained. If the

temperature of 60°C was maintained for at

least one hour, the anti-Legionnaire’s

disease routine is reset and the monitoring

process starts from this time point. This

function is designed to prevent the growth

of legionella bacteria.

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