Savin SDC306 Betriebsanleitung PDF herunterladen (Seite 28)

Installation and Operating Instructions

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

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10.1.7 Return line monitor

In the case of solar thermal systems with

auxiliary heating and where there is a heat

station, the return line of the heating circuit

is layered into the storage cylinder.

Depending on the temperature difference

between the return line and the solar

storage cylinder in the middle, a 3-way

valve is triggered in order to layer the return

line at the bottom or centre of the solar

storage cylinder. The heating flow is

connected to the upper part of the solar

storage cylinder.

To prevent the pump from switching on and

off due to only minimal differences in

temperature, a hysteresis is preset.

10.1.8 Thermal transfer

In the case of systems with a storage

cylinder and an additional solar storage

cylinder, this function transfers the water

heated by solar power from the solar

storage cylinder to the conventionally

heated storage cylinder. To prevent the

pump from switching on and off due to only

minimal differences in temperature, a

hysteresis is preset.

10.1.9 Pump block protection

All pumps that have not run for 24 hours are

switched on for approximately 5 seconds

each day between 12.00 and 12.01.

10.1.10 Solid fuel boiler

Activation conditions for the loading pump

are that:

1. the boiler temperature is 5K higher

than the minimum temperature of the

boiler and,

2. the boiler temperature is 5K lower

than the maximum temperature of

the boiler and,

3. the storage cylinder temperature is

5K lower than the storage cylinder

maximum temperature, and

4. the difference between the boiler

temperature and storage cylinder

temperature is higher than the

switch-on hysteresis.

Deactivation conditions for the loading

pump are that:

1. the boiler temperature is lower than

the minimum temperature for the

boiler, or

2. the maximum boiler temperature is

reached, or

3. the storage cylinder temperature has

reached the maximum storage

cylinder temperature, or

4. the difference between boiler

temperature and storage cylinder

temperature is less than the switch-

off hysteresis.

10.1.11 Swimming pool heating/secondary storage cylinder

The second solar consumer “swimming

pool” is operated as per a standard

system (storage cylinder). The

difference between this and a buffer

storage cylinder is a lower hysteresis of

1K.

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