FM443 Function module - We reserve the right to make technical modifications.
13
Product description
2
2.3.1
Manual switch (solar circuit 1)
Tab. 4
Manual switch positions
If manual mode is activated:
–
the warm medium of the solar thermal system (e.g. glycol:
water mixture) can flow from the storage tank to the collector
array.
–
the cold medium (< 32 °F (0 °C)) of the solar thermal system
(e.g. glycol: water mixture) can flow from the collector to the
storage tank – the storage tank temperature drops, so that
reheating may start, for example.
–
the collector protection is disabled.
–
the tank protection is disabled.
–
the collector frost protection is disabled.
USER NOTE
If the manual switch is not in automatic mode, a message to that
effect appears on the MEC2 remote control, and the "Module fault"
LED on the module lights up.
Position
Effect
Solar circuit 1 (solar circuit pump 1) and the bypass
(3-way valve) are switched off.
Use this setting only for commissioning or for
maintenance or service work.
Solar circuit 1 and the bypass are in automatic mode
– this is the standard setting.
Manual mode is activated.
Solar circuit pump 1 is switched on. The bypass is
not being controlled.
