A247 was originally made with A247.1, A247.2, A347.1 and A347.2.
As per January 2014 the A247 appl.-key contains an extra subtype, A247.3.
Main differences, compared to A247.1:
No alarm
S7 is DHW-charging temp. Sensor
S4 is DHW-heating temp. Sensor
P2 is DHW primary circuit circulation pump
P4 is DHW-charging pump.
Mounting Guide has been updated.
Installation Guide has not been updated yet.