Bosch BSS250E-2 Installation And User Manual page 37

2. Complete all the installation and that the Sola-Stat–Eco is securely mounted.
3. The system is full of water.
4. Power outlet socket to be installed by a qualified electrician.
5. There is no water, metal shavings or other electrical hazards to contaminate the plug,
socket and surrounding environment.
Only then;
Plug it in and turn it on.
What You Should See.
The first thing you should see after power up is;
1. On the top left the „PWR‟ light should be on.
2. Other lights will be on depending on how the solar hot water system is operating.
The pump operation can be tested by pressing the „PUMP‟ button. This will turn the pump on
as long as the button is held down, unless of course the pump is already on in normal
operation.
The SolaStat-Eco is now installed and should be working. It would be best to observe some
solar hot water pump cycles but this will rely on the sun shining. Check all functions are
working correctly before leaving the installation.
Note 1. See User Guide for explanation of display and status lights.
Note 2. See "Trouble shooting" section if system not working correctly.
SolaStat-Eco Sensor Maintenance.
Lengthening SolaStat-Eco Sensor Wire.
The sensor wire can be lengthened within certain guidelines. Poor connections or induced
interference can cause false temperature readings.
1. The sensor is not polarized- it can be connected either way around.
2. The wire normally used for sensor lengthening is twin 0.5mm^2 stranded speaker wire.
3. Firmly attach wires to each other by either soldering (heatshrink over each joint) or by
quality screw terminals. Joins must be kept dry.
4. It is recommended that sensor leads be kept 300mm away from mains and comms cables.
5. Over 20 metres; extra care must be taken to avoid electrical interference being picked up.
6. In „noisier‟ electrical environments screened cable may be required.
7. The absolute maximum cable length is 100 metres.
Replacing a SolaStat-Eco Sensor.
If a damaged sensor needs to be replaced then the cover of the enclosure will need to be
opened unless the choice is made to join the wires externally (see "Sensor Wire Lengthening"
section).
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