Electrical Connections Examples - Baxi Luna HT 1.450 Notice D'installation Et D'entretien

The electrical connections and settings needed to control a multi-zone central heating system vary depending on what
accessories are connected to the boiler.
To permit the boiler to handle requests from individual zones, turn the Summer/Winter selector (1 - figure 30) on the
boiler's front panel to Winter (
a) Without a QAA73 remote control:
Connect the switch for functioning in multi-zone mode in parallel to the "RT" terminals 1-2 on terminal board M1 as
shown in figure 25. Remove the default bridge.
Set the desired temperature with knob 6, figure 30, directly on the boiler control panel.
b) With the QAA73 remote control:
Connect the switch controlling those zones not controlled by the QAA73 in parallel to the "RT" terminals 1-2 of terminal
board M1 as shown in figure 25. Remove the default bridge.
The zone controlled by the QAA73 is supplied by the zone 1 solenoid valve as shown in figure 25. The QAA73 automati-
cally controls room temperature in its own zone.
Use the boiler control panel to set room temperature in the other zones.
Case 1: installation without an outdoor temperature sensor:
Use the central heating temperature control knob (6 - figure 30) on the boiler's control panel to set central heating out-
put temperature to the various zones.
If heating requests are received simultaneously from the main zone controlled by the QAA73 and another zone, output
temperature will be the higher of the two values set on the QAA73 and on the boiler's central heating temperature con-
trol knob.
Case 2: installation with an outdoor sensor:
Central heating output temperature to the various zones is determined by the electronic control card on the basis of
outdoor temperature and the preset heating curve as described in section 11.3.
If heating requests are received simultaneously from the main zone controlled by the QAA73 and another zone, output
temperature will be the higher of the values set on the QAA73 and calculated by the boiler's electronic control card.
INSTALLATION AND SERVICING INSTRUCTIONS
11.4 ELECTRICAL CONNECTION EXAMPLES
) position.
1 Zone
1 Zone
(QAA73)
(ROOM THERMOSTAT)
solenoid valve
1 Zone
2 Zone 3 Zone
(ROOM THERMOSTAT) (ROOM THERMOSTAT)
33
N Zone
(ROOM THERMOSTAT)
Fig. 25
7110242.02 - en