Terminal Descriptions - Baxi LUNA HT 380 Notice D'installation Et D'entretien

Turn the control box downward to access terminal boards
M1 and M2 used for the electrical connections by removing
the two protective covers (see figure 22).
Terminals 1-2, terminal board M1: room temperature ther-
mostat "RT".
Note:
The M1 bus terminal is 120V. If you are using a 24V ther-
mostat, then a 24V relay card, sold as an accessory, is
required.
WARNING
If the room thermostat being used incorporates an
anticipator it MUST be wired as shown in Fig. 21 C.
Terminals 4-5, terminal board M2: are the connections for SIEMENS QAA73 remote control. These connections do not
have any specific polarity. Remove the bridge between terminals 1-2 "RT" on terminal board M1. Read the instructions
provided with the temperature regulator to ensure correct installation and programming.
Note:
Terminals 4 & 5 can be set to a dry set of contacts by accessing line 614 on the QAA73 controller and setting the value
to 1. A no voltage or battery operated thermostat can now be connected to this set of terminals. However, a QAC34
outdoor temperature sensor cannot be used in this application.
Terminals 7-8, terminal board M2: connections for the optional SIEMENS QAC34 outdoor temperature sensor. Read
the instructions provided with the outdoor temperature sensor to ensure correct installation.
Terminals 1-2-3, terminal board M2: connections for a zone control solenoid valve (see figure 25 in section 11.3).
Cable guid
To remove
with QAA73
Fig. 23
Domestic hot water temperature and timing must be programmed on the QAA73 remote control; unless the QAA73 is
to be disconnected after setup, in which case the domestic hot water temperature is controlled by the domestic hot
water setpoint dial on the front of the unit. The time switch programming of the central heating circuit can be set on the
QAA73 if there is a single zone, or in relation to the zone controlled by the QAA73 device.
Please refer to procedure described in the commissioning paraghraph 12.5 "using the siemens QAA73 remote control
to program the boiler parameters", and also see the instructions provided with the QAA73 remote control.
INSTALLATION AND SERVICING INSTRUCTIONS

11.1 TERMINAL DESCRIPTIONS

Screw
Terminals M1
Cover
30
Cover
Terminals M2
Fig. 22
LEGEND:
N.C. - Normally Closed contacts
C - Common
N.O. - Normally Open contacts
WIRE COLOURS:
M Brown
N Black
C Light blue
R Red
7109741.01 - en