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
W
h
it
e
B
lu
e
G
ra
y
G
re
e
n
R
e
d
B
la
c
k
O
ra
n
g
e
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.
