Connecting The Room Thermostat; Accessories Not Included In The Supply - Baxi NUVOLA DUO-TEC GA Series Instruction Manual For Users And Fitters

11.1 CONNECTING THE ROOM THERMOSTAT

The connections in terminal block M1 are high voltage (230 V). Before making connections, make sure the appliance is discon-
nected from the power supply. Respect polarity L (LIVE) - N (NEUTRAL).
To connect the Room Thermostat to the boiler, proceed as described below:
• switch off the boiler;
• access the terminal block M1;
• remove the jumper from the ends of contacts 1-2 and connect the wires of the Room Thermostat;
• switch on the boiler and make sure the Room Thermostat works correctly.

11.2 ACCESSORIES NOT INCLUDED IN THE SUPPLY

11.2.1 EXTERNAL SENSOR
To connect this accessory, see figure to side (terminals 4-5)
and the instructions supplied with the sensor.
SETTING THE "Kt" CLIMATE CURVE
When the external sensor is connected to the boiler, the elec-
tronic board adjusts the flow temperature calculated according
to the set Kt coefficient. Select the required curve by pressing
as indicated in the chart in annex "SECTION" E for
selecting the most appropriate one (00 to 90).
KEY TO CHART - "SECTION" E
Flow temp
11.2.2 CONNECTING TO A ZONE SYSTEM
To use this function, install the programmable relay electronic board supplied as an accessory.
Z Zone (1..n) EV Zone electrovalve
R Relay RT Room thermostat
KEY TO ELECTRICAL CONNECTIONS (see diagram in annex "SECTION" F at the end of this manual).
The boiler can manage a zone heating system. The Room Unit (wall-mounted) can be used to control one zone while normal
ambient thermostats can be used to control the other zones.
SYSTEM CONNECTIONS
• Connect the zone 1 valve/pump to terminals 1 - 3 of the relay board terminal block inside the boiler control box.
• Connect the Ambient Thermostat contact of the other zones to terminals 1-2 of terminal block M1 (CONNECTING THE AMBI-
ENT THERMOSTAT section).
Check that parameter P04=02 (SETTING PARAMETERS section).
Outside temp
31 7114043.01 (1-06/13)