Brivis BX3 - Wiring the Brivis Programmable Thermostat

281 Issue 1 - Service Manual - BX3
9
Wiring the Brivis Programmable Thermostat (Add-On & Fan Only)
The BX3 does control board does not have provision for “Add-On” cooling. For “Add-On”
cooling operation the unit can be configured. Refer to Diagram 5 for interconnection to the unit
and wall control for “Add-On” cooling.
For heating only systems “Fan Only” operation can be configured as shown in Diagram 5, the
only connection not required is “Y”.
Diagram 5.
Item
No:
Description Field Supplied
Y/N
1 ¼” spade (female) + cover + sheathed conductor 0.75mm² (min) Y
2 Fan Motor N
3 Red conductor N
4 Relay NC - 24Vac coil switching 240Vac Y
5 Heater Control Board N
6 CDU Compressor Relay Y
7 Sheathed conductor wire, minimum 0.75mm² cross-sectional area Y
8 Sheathed conductor wire, minimum 0.75mm² cross-sectional area Y
9 Terminal block on Heater N
10 Brivis Programmable Controller Purchase
from Brivis
Table 2:
Supplied & Field supplied
components for Add
-
On connection
Notes:
1. All electrical works to comply with relevant regulations.
2. Requires Brivis programmable Thermostat.
3. For field supplied parts refer to Table 2.
4
3
5
3
N
A
1
2
8
To “Y” terminal on wall
control
White
Blue Gray
Green
Red
Black
Orange
To Brivis
Programmable
Controller Only
9
7
6
W
R
1
Note:
On the heater terminal block ‘C’ (Blue), ‘Y’ (Gray), ‘TW2’ (Orange) & ‘TW1’ (Black) are all inactive
for the above configuration.