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66
AST 14 C 255/00
Wiring diagrams
The heating zones 1 and 2 can be controlled by remote control (TA1) or ambient
thermostat (TA2) that can be connected to the boiler boards, whereas zones 3 and 4 are
activated by the ambient thermostat directly connected to the relevant zone board. Zones
3 and 4 can not manage the safety thermostat on flow line (TSM) which therefore is to be
connected in series to the pump power supply and cannot be signalled as a fault.
Whereas, as far as solar plant connections are concerned, the solar collector probe (SCS)
and the solar water heater probe (SBS) are on the boiler board, while the connection of the
solar valve probe (SVS) is on the supplementary board.
Zone 2
Zone 3 and 4
Solar
MAX
100m
