10
21. 01. 21. Document Number 671661
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
XBC 75 & 85 (ES / BC Control)
Installation Manual
9.0 ELECTRICAL INSTALLATION
Before commencing work, make sure that the unit, switched live
and Nuaire control are electrically isolated from the mains supply.
All inter-connections between circuit boards, blowers and sensors are
made at the factory. This diagram only shows the essential field wiring
points for clarity.
9.1 Ecosmart Control (ES) Units
*Remove link wire if switched live signal, an enabler or BMS signal is
connected.
†
If a damper is not fitted, connect (Factory Fitted) a link wire from OP
to RET. This will cancel the delay.
Independent speed control can be achieved by removing the net link
connection between supply and extract control boards.
9.1.1 Volt Free Contacts
Volt free contacts are not fused. If these are used to power any external
equipment, the installer must provide adequate fusing or other
protections. These contacts are rated at 5 A resistive, 0.5 A inductive.
Run Connections - Contacts:
closed when fan running.
Fault Connections - Contacts:
closed when no fault, open when fault.
Heat Demand - Contacts:
Closed when heating selected.
9.1.2 Wiring - ES Control, No Heating
15
Wiring - ES Control, No Heating
Damper Connections
Run
Signal
Signal
Fault
Min
Max
on
SL run
Test
0
Trickle
1
ES-CO2
BMS
Connection Input
Signal
0-10V
0V
Ecosmart
Pwr
Standby
Fan 1
Fan 2
Heating
Cooling
Fault
TX
Frost
RX
Extract
N
E
L
SL
DP
CL
N
RET
Link Wire*
Heat
Demand Run Fault
Heat Demand
Signal
Min
NET Connections for Ecosmart Devices
Max SL run
on
0
Test
Link Wire*
1
Trickle
ES-CO2
Connection
BMS
Input
Signal
0V
0-10V
Ecosmart
Pwr
Standby
Fan 1
Heating
Fan 2
Cooling
Fault
TX
RX
Frost
Extract
N
E
L
SL
DP
CL
N
RET
Run Fault
Damper Connections
Run
Signal
Fault
Signal
Damper Link
†
NET Connections for Ecosmart Devices
Damper Link
†
Volt Free Relay Contacts
Volt Free Relay Contacts
Remove NET link Connection
for independent speed control
Pump
Alarm
rel
ay
5 amps 250A ac/30V dc
br
eak on
fault
Con-Pump
Fuse (1 amp)
Ea
rth
Neut
ral
Li
ve 230V
Mains Ea
rth
Mains Neut
ral L1 L2 L3
L1 L2 L3
L1 L2 L3
Isolator
by others
Customer
Connections
400V-50Hz 3ph
9.1.3 Wiring - ES Control, LPHW Heating
16
Wiring - ES Control, LPHW Heating
Inlet
Outlet
Sensor Sensor
Cool
DX
Sensor Coil
Damper Connections
Run
Signal
Fault
Signal
Cool
Frost
Demand Alarm DX-1 DX-2
Min
Max SL run
on
Test
0 1
Trickle
ES-CO2
BMS
Connection Input
Signal
0-10V
0V
Ecosmart
Pwr
Standby
Fan 1
Heating
Fan 2
Cooling
Fault
TX
Frost
RX
Extract
N
E
L
SL
DP
CL
N
RET
Link Wire*
Heat
Demand Run Fault
Heat Demand
Signal
Setting
Heater Temperature
o
C
15
20
25
30
Min
NET Connections for Ecosmart Devices
Max
on
SL run
0
Test
1
Trickle
Link Wire*
ES-CO2
BMS
Connection Input
Signal
0-10V
0V
Ecosmart
Pwr
Standby
Fan 1
Fan 2
Heating
Cooling
Fault
TX
Frost
RX
Extract
N
E
L
SL
DP
CL
N
RET
Run Fault
Damper Connections
Run
Signal
Signal
Fault
Damper Link
†
NET Connections for Ecosmart Devices
Damper Link
†
Volt Free Relay Contacts
Volt Free Relay Contacts
Remove NET link Connection for independent speed control
Pump
Alarm
rel
ay
5 amps 250A ac/30V dc
br
eak on
fault
Con-Pump
Fuse (1 amp)
Ea
rth
Neut
ral
Li
ve 230V
Mains Ea
rth
L1
Mains Neut
ral
L2 L3
L1 L2 L3
L1 L2 L3
Isolator
by others
Customer
Connections
400V-50Hz 3ph
