Baxi AGU 2.550 Mode D'emploi page 25

6.2 SCHEME 2
More than one low temperature zone with ambient thermostat and shared room unit - heating circuit(1)
High temperature zone with ambient thermostat - heating circuit (2)
1 External sensor - terminal block M2 (4-5) on the boiler
2 Low temperature zone mixing valve (QX21-N-QX22)
3 Low temperature circuit pump (QX23-N)
4
Low temperature circuit probe (BX21-M)
5 Ambient unit - terminal block M2 (1-2-3) on the boiler
6 Low temperature circuit safety thermostat (connect in series to the electrovalves, see chap. 8.4)
7 Low temperature zone room thermostat input (12V) (H2-M)
8 Electrovalve or externally powered high temperature zone pump
9 High temperature zone ambient thermostat (for connection see chapter 8.1)
Enter menu 2 from the Remote Control as described in section 5, and make the following settings:
PROGRAMME
MENU
ROW
5715
5977
CONFIGURATION
6020
6046
710
HEATING CIRCUIT 1
834
HEATING CIRCUIT 1
Set the comfort temperature to it maximum value (35°C) to ensure the low temperature zones work correctly. This ensures that the
room unit does not block the heat demand of the individual room thermostats managing the subzones.
In this case, the room unit manages the low temperature system, but it cannot be used to manage the temperature of one of the
rooms. Turn knob B to display the boiler flow temperature. The heating circuit operates with a fixed flow.
Connect the thermostat protecting the low temperature zone in series to the feed of the zone electrovalves so as to totally
close the circuit in case of fault.
PARAMETER
Heating circuit 2
H5 input function
Extension module 1 function
Function of H2 input on
module 1
Comfort temperature
Actuator stroke time:
25
VALUE TO SET
On
Room thermostat Circuit 2 thermostat enable
CH2 (terminal block M1 (1-2) on boiler)
Temps / mode
Low temperature zone enable
CH1
Room thermostat H2 input enabled as low temperature zone
CH1
35°C Room setpoint (low temperature zone)
Default 180 s
DESCRIPTION
Heating circuit 2 enable
room thermostat
Mixing valve close time
7104900.03 (1-11/13)