Baxi Power HT Installation, Operation And Maintenance Manual page 24

c) with AGU2.500 for control of a low temperature system:
Refer to the instructions provided with the AGU2.500 accessories for connection and control of a low tempe-
rature zone.
In this case some electronic parameters must be modified (see §14) (H552-H553-H632).
The electrical connection and settings needed to control a system divided into zones vary depending on the
accessories connected to the boiler.
a) Without QAA73 room temperature control device:
The contact relating to the request for operation of the various zones must be parallel-connected and connected
to terminal 3-4 "TA" of terminal block M2 in figure 10. The jumper present must be removed.
The central heating temperature is selected directly on the boiler control panel in accordance with the instruc-
tions provided for the user in this manual.
b) with QAA73 room temperature control device:
The pump relating to the room controlled by the QAA73 temperature control device must be supplied with
electricity by means of terminals 11-12 of terminal block M3 in figure 10.
The contact relating to the request for operation of the other zones must be parallel-connected and connected
to terminal 3-4 "TA" of terminal block M2 in figure 10. The jumper present must be removed.
The central heating temperature of the zone controlled by the QAA73 is set automatically by the QAA73 it-
self.
The central heating temperature of the other zones must be selected directly on the boiler control panel.
In this case some electronic parameters must be modified:
H552 = 50, H632 = 00001111.
Figure 10
c) with AGU2.500 for control of a low temperature system:
Refer to the instructions provided with the AGU2.500 accessories for connection and control of a low tempe-
rature zone.
In this case some electronic parameters must be modified (see §14) (H552-H553-H632).
IstructIons pertaInInG to the Installer
12.6 connecting a zone system
BOILER
CIRCULATING
PUMP
HEATInG CuT-OuT
rELAy
2 ZONE 3 ZONE
(ROOM THERMOSTAT) (ROOM THERMOSTAT)
2 zOnE- 3 zOnE-
PuMP PuMP
1 ZONE
BOILEr
PuMP
(QAA73)
1 ZONE PUMP
96
n ZONE
(ROOM THERMOSTAT)
n zOnE-
PuMP
912.199.3 - GB