Savin SDC306 Instruções de Operação descarregar pdf (Página 27)

Installation and Operating Instructions

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

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10.1.2 Yield estimation / yield metering

For the purposes of yield estimation (heat

quantity), the collector sensor serves as a

reference sensor for the hot flow, the

storage cylinder sensor at the bottom

serves as a reference sensor for the cool

return line. The volume flow, type of glycol

and glycol concentration are entered in the

control unit. A daily yield value is calculated

from these five values and can be

displayed. Adding together the daily yields,

in each case at 0:00 gives the total amount

which can also be displayed. The yields can

be reset manually.

For the purposes of yield metering, instead

of entering a volume flow, the value

measured by a flow meter is processed as

volume flow.

10.1.3 Password

The parameters contained in the “Basic

settings” menu can be changed only

following entry of a 4-digit numerical

password. Once the password has been

entered, it can also be changed.

10.1.4 Auxiliary heating

For the upper part of the storage cylinder

(standby capacity), a start temperature for

auxiliary heating is preset. Once the

temperature of the water reaches this

temperature, the auxiliary heating is

triggered so that the water cannot fall below

this temperature. A clock timer is available

for this function.

To prevent the pump from switching on and

off due to only minimal differences in

temperature, a hysteresis of 5K is preset.

10.1.5 Tolerance for solar yield

In the case of a solar yield from the

collector, the “Start temperature for auxiliary

heating” (minimum temperature) is reduced

by the amount set for “Tolerance for solar

yield”. In other words, if loading takes place

between the collector array and the storage

cylinder, the auxiliary heating is triggered to

reach a reduced value (e.g. 60°C – 10K =

50°C). If no loading takes place for at least

15 minutes, the reduction is removed again.

This allows the solar thermal system to

provide higher yields.

10.1.6 Increase in return line temperature

In the case of solar thermal systems with

auxiliary heating, the solar energy from the

storage cylinder can be used via a

temperature increase in the boiler return. If

there is a difference in temperature between

the return line of the heating circuit and the

base/centre of the solar storage cylinder, a

3-way valve is activated so that the lower

part of the combination storage cylinder

runs in series to the heating return line.

To prevent the pump from switching on and

off due to only minimal differences in

temperature, a hysteresis is preset.

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