Resol DeltaSol CS Plus bidirectional Manual For The Specialised Craftsman page 34

Solar controller

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Arrangement 8: Solar system with backup heating by solid fuel boiler

The controller calculates the temperature difference between collector sensor S1

and store sensor S2. If the difference is larger than or identical to the adjusted

switch-on temperature difference (DT O), the solar pump will be activated by relay

1, and the store will be loaded until the switch-off temperature difference (DT F)

or the maximum store temperature (S MX) is reached.

PWM 2

PWM 1

VFD

VFD / TR

VBus

1 2

3 4 5 6 7 8 9 10

S3 / TSTT

A solid fuel boiler will be controlled by relay 2, if the temperature difference be-

tween sensors S4 and S3 is larger than or identical to the adjusted switch-on tem-

perature difference (DT3O), until the adjusted minimum (MN3O) and maximum

(MX3O) temperature thresholds of the solid fuel boiler and the store are reached.

S3 can optionally be used as the reference sensor for the store emergency shut-

down option (OSEM). If the heat quantity measurement option (OHQM) is activat-

ed, S1 or VFD can be used for measuring the temperature (see table on p. 63).

N R2

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