THERMAL INNOVATIONS (UK) LTD | THERMAFLOW® ELECTRIC COMBINATION BOILER |
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Checking circuit breakers
Switch each circuit breaker off in turn and check that continuity is broken to each element.
Checking the contactor
Turn the main isolator off (this should be situated adjacent to the boiler) you should hear a dull
thump from the enclosure marked number
3
on the boiler schematic
diagram 1.8.1.
This indicates
that the contactor has disconnected the circuit to the MCB’s and in turn the heating elements. Turn
the main isolator on and off a few times and listen for this noise. This will indicate correct operation
of the contactor.
Check the operation of the AQUA STAT
The Aqua Stat is positioned at the entrance to the pre-heat coil on the cold water supply above the
top heating element on the boiler.
Make sure the
external controls are calling for heat.
Turn the dial
on the thermostat up and down and listen for a small click. As you turn the thermostat dial up and
down check if the central heating pump, (
positioned on the right side of the unit
) is switching
on
and
off.
If this is the case, this indicates correct operation of the thermostat.
