Porter&Charles CC76V Instructions D'utilisation Et D'installation page 18

Turn on dual and triple zones (available only in some models)
Turn on the dual zone
The activation of the dual zone is done after selecting the desired zone
corresponding Dual Zone Indicator goes on statically. Touching for a
second time, the status of the dual zone toggles: it changes from dual zone
on to dual zone off and back again.
The extension zone can be activated only, after a level between 1-9 is set
on the basic zone of the heater.
Turn on triple zones
is set to level 1–9 and the heater is selected, the dot is on.
If is pressed, the buzzer signal sounds and the Dual Zone Indicator is
statically on. If is pressed once again, there is another acoustical signal
and the triple zone is switched on. The Triple Zone Indicator will be
illuminated and the triple zone will be energized.
After touching once again, the triple ring of the zone will be switched
off again. Each operation causes a status change of the dual/triple zones
following in this manner (Dual zone on, triple zone on, all extended zones
off, dual zone on, triple zone on, dual zone on, etc. ...)
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