4
Safety requirements
These instructions are intended exclusively for authorised contractors.
All installation and wiring work on the controller must only be carried out in
a zero volt state.
The opening, connection and commissioning of the device may only be
carried out by competent personnel. While doing so, they must observe all
local safety requirements.
This device is state of the art and meets all necessary safety regulations. It may only be used in ac-
cordance with the technical data and the safety requirements and regulations listed below. When
using the device, also observe the statutory and safety regulations apposite to the particular use.Any
other use will automatically void all warranty rights.
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The device must only be installed in a
dry
interior room.
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It must be possible to isolate the controller from the mains using an omnipolar isolating facility
(plug/socket or 2-pole isolator).
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Before starting installation or wiring work, the controller must be completely isolated from the mains
and protected against reconnection. Never interchange the safety low voltage connections (e.g.
sensor connections) with the 230 V connections. Destruction and life threatening voltages at the
device and the connected sensors may occur.
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Solar thermal systems can become very hot. Consequently there is a risk of burns. Proceed with
caution when fitting temperature sensors.
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For safety reasons, the outputs should only be left in manual mode when testing. In this operating
mode, no maximum temperatures or sensor functions are monitored.
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Safe operation is no longer possible if the controller or connected equipment exhibits visual dam-
age, no longer functions or has been stored for lengthy periods in unsuitable conditions. If this is
the case, disable the controller and equipment and secure against unintentional use.
Maintenance
If treated and used correctly, the device will not require any maintenance. Use a cloth moistened with
mild alcohol (such as methylated spirits) to clean. Never use corrosive cleaning agents or solvents
such as chloroethylene or trichloroethylene.
No components relevant to long term accuracy are subject to loading if the device is used correctly.
Consequently long term drift is extremely low. The device therefore cannot be calibrated. Thus apply-
ing any compensation is impossible.
The design characteristics of the device must not be changed during repairs. Spare parts must corre-
spond to the original spare parts and must be used in accordance with the build version.
Function mode
This unit is a very compact control system that has many applications for solar warm water and heat-
ing systems and for pumps and valves used in such systems.
The 16 sensor signals pass through overvoltage protection, a low-pass filter, and the multiplexer
before they reach the processor's A/D transformer. An adjustable reference is used to calculate the
value of the measurement signal. In addition, the computer periodically checks all of the operator's
controls, describes the display, and handles the CAN bus.
Once the temperatures have been calculated and links set, the power driver switches the respective
outputs. To prevent a loss of data, the device has nonvolatile memory (EEPROM) and a super ca-
pacitor (for around three days) for reserve power.
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