RADSON 51043 Guide D'utilisation page 36

MASTER A
Zone 1 => used with THA1 (Digital or Analogue thermostat)
Zone 2 & 3 => used with THA2 (Digital or Analogue thermostat)
Zone 4 => used with Programmer (Main zone programmer)
Zone 5 to 12 => not used (or not installed)
MASTER B
Zone 1 => used with THB1 (Digital or Analogue thermostat)
Zone 2 => used with THB2 (Digital or Analogue thermostat)
Zone 3 => used with THB3 (Digital or Analogue thermostat)
Zone 4 => used with THB4 (Digital or Analogue thermostat)
Zone 5 to 12 => not used (or not installed)
Note:
This submenu will be more comprehensible when all zones and
Masters are renamed.
View
 Master A
Zone1 THA1
Zone2 THA2
Zone3 THA2
Zone 4 Programmer
View
Zone 4 Programmer
.............
Zone 12 Not used
 Master B
Zone 1 THB1
Zone 2 THB2
Zone 2 THB3
View
Zone 1 THB1
Zone 2 THB2
Zone 3 THB3
 Zone 4
THB4
Zone 5 not used
36