Room Thermostat Connection - Baxi Slim 1.230 FiN User's And Installer's Manual

7. Room thermostat
connection
• Reach the terminal board as described in paragraph 5.1.
• Take off the jumper from terminals (1) and (2) of the main terminal
board (see electrical diagram in paragraph 6).
• Insert the duplex cable through the cable clamp of the boiler and
connect it to the two terminals (use a "HAR H05-VV-F" 2x0.75 mm
cable with a diameter of 8 mm max).
Multi- zones installation
In case of a multi-zones installation, the room thermostats have to be
connected following the diagram of fi gure 3.
Zone-valves or zone-pumps have to be electrically supplied separately
from the boiler as described in the electrical diagram of fi gure 3.
With QAA73 climatic regulator
The zone valve and zone pump controlled by the QAA73 have to be
electrically supplied following the diagram in fi gure 3.
BOILER
P O W E R S U P P LY
TERMINAL BOARD
POWER SUPPLY
TERMINAL BOARD
Figure 3: Electrical diagrams connection of multi-zones installation room thermostats and pumps and valves supply
QAA73 TERMINAL
BOARD
QAA73
BOILER
QAA73 TERMINAL BOARD
QAA73
Case 1: Installation without external probe
The heating fl ow temperature for the single zones must be set by means
of the Central Heating circuit temperature control device of the boiler
control panel (knob 2). In case of simultaneous demand from the main
zone, controlled by the QAA73, and one of the other zones, the heating
2
fl ow temperature will be the maximum value between the one processed
by the QAA73 and the one set on the boiler control panel (knob 2).
Case 2: Installation with external probe
The heating fl ow temperature for the single zones is the one processed by
the electronics (PCB) of the boiler according to the external temperature
and the set heating curve as described in the section "External probe
connection".
In case of a simultaneous demand from the main zone, controlled by the
QAA73, and one of the other zones, the heating fl ow temperature will
be the maximum value between the one processed by the QAA73 and
the one processed by the boiler PCB.
ROOM
PUMP
THERMOSTAT THERMOSTAT
OF QAA73 ZONE
OF ZONE 1 OF ZONE 2
ROOM
THERMOSTAT
OF ZONE 1
VALVE
OF QAA73 ZONE
Note: if the zone valves are not the double supply type, do not consider
the broken line connections. Zone relays are not necessary when using
valves with end-stroke micro-switch.
18
ROOM ROOM
THERMOSTAT
OF ZONE N
ROOM ROOM
THERMOSTAT THERMOSTAT
OF ZONE 2 OF ZONE N