Frequently Asked Questions

THIS ONE FIRST
Q. ‘How do I program unit?’
A. Take a look at the .pdf instruction manual first. It will help to familiarise yourself with the layout and general operation so guidance will be easier should you still need to call.

Q. ‘Pola HP11—I have power on unit, it has switched on but there isn’t power getting to boiler/pump/heater?’
A. Check that there is power connected to terminal 4 (‘Common’ supply terminal of output relay) If there isn’t power going into common, you won’t get power out of the switched live.

Q. ‘POLA Can I extend the cable length?’
A. Yes, use 2 core copper wire of about 0.75mm squared cross sectional area. You should not need to recalibrate. Avoid cable runs in same conduit/truncking as mains cable or you may effect sensor reading. As a rule of thumb, try to keep them at least 10/12” appart.

Q. ‘Temperature reading is oscillating rapidly up and down’
A. The sensor cable is probably being effected by being to close to a mains cable. Avoid cable runs in same conduit/truncking as mains cable or you may effect sensor reading. As a rule of thumb, try to keep them at least 10/12” appart.

Q. ‘Temperature doesn’t read what is expected’
A. Make sure sensor tip is precisely where you want temperature measured. Remember ‘temperature gradients’ (Temperature will be hottest at heater surface and coldest at extreme locations and so depending on where the sensor tip is placed between the 2 the reading will vary) Same applies for vertical applications—heat rises.