5
Signal
B
A
RECEIvER UNIT (bOILER mOUNTEd)
1. During normal operation light (A) is on for Hot water Operation.
2. During normal operation light (B) is on for Central Heating Operation.
3. If the Reset Button is pressed on the room thermostat the signal lights on the receiver unit will light. If less than
4 lights are on either the room thermostat is too far from the boiler or the batteries in the room thermostat need
replacing.
At the same time “M-050 S-050” is shown on the room thermostat. The number is another indicator of signal
strength - the lower the number the better.
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