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Sol Plus solar controller
Sol Plus solar controller
The Sol Plus has been especially developed for the speed control of high-efficiency
pumps in standard solar and heating systems. It is equipped with 2 PWM outputs.
Solar packages for DHW heating and heating backup with DeDietrich boilers:
The SOLAR Sol Plus with “SOLARFIRST” function (see page 47) and ModBus
controls a solar system with 1 collector field and 1 store with integrated heat ex-
changer. The Sol Plus is designed for DHW heating and heating backup.
The Sol Plus controllers are equipped with the “SOLARFIRST” function via
ModBus and can be connected to DeDietrich boiler controllers by means of Mod-
Bus cables.
As soon as the solar control switches on, the system will be set to solar priority via
the connection to the boiler.
The set hot water temperature will be reduced (adjustable 0-30 K). This way, the
water will be heated by the solar system first. If the solar system switches off, so-
lar priority will be stopped and the controller switches the boiler to its standard
adjustments.
Due to this function, the solar system can supply 20 % more heat for the store.
The “STEAMBACK” safety concept:
The Sol Plus controller is part of the “STEAMBACK” safety concept. If the col-
lector temperature reaches 130 °C, all functions will be deactivated. The fluid in
the collector continues heating and will turn into vapour at 140 °C. It will then be
pressed into the expansion vessel through extension.
The collector will not contain any solar fluid then. There will be no steam ham-
mer - the solar fluid will not be harmed. If the suns goes down and if the collector
temperature falls below 140 °C, the solar fluid will condense and the pressure in
the expansion vessel will fill the collector again. Only if the collector temperature
falls below 100 °C and that of the store below 60 °C, will the controller activate
the solar system.
Whether holiday, power failure or fault - the DeDietrich “STEAMBACK” safety
function protects your solar system and makes it maintenance-free and durable.
The Sol Plus solar controller is used for controlling a solar system with 1 store with
integrated heat exchanger and one 3-port valve for return preheating. It can also
control a solar system with 1 store with 2 integrated heat exchangers via a 3-port
valve. The Sol Plus is designed for DHW heating and heating backup in solar thermal
systems connected in series.
It can be directly mounted onto the pump station. For using several functions such
as store base/top or combined store with return preheating, the controller can also
control a 3-port valve in addition to the solar circuit pump. The parameter Arr can
be used for selecting the system configuration.
