2
15. 02. 22. Document Number 672040
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
BPS H-CO
Installation Manual
1.4 Multiple Sensors
Where multiple sensors are connected the following options are
available.
State Description
Temp Sensor Operation Room module average (Default)
Return Air only
Room Module & Return Air Average
Setpoint Operation Last Value Changed (Default)
Software Setpoint Only
Last Value Changed With Timeout
Humidity Sensor Operation Average (Default)
Max
Ignore
CO2 Sensor Operation Average (Default)
Max
Ignore
Pressure Sensor Operation Average (Default)
Max
Ignore
1.5 Auxiliary Inputs 16 & 17 (0-10V Inputs)
The function of IN16 & IN17 can be set by the network inputs IN16
Function & IN17 Function. The available options are as follows.
Function Description Available Ranges
None The signal is ignored N/A
Fan Speed
Control
A 0-10V input is used as a fan speed
demand.
0V = Min Speed
10V = Max Speed
N/A
EGG
(Ecosmart
Gateway
Gadget)
0-10V from the EGG PCB is controls
used as a fan speed demand. The
optional EGG PCB can be used for
backwards compatibility with some
Ecosmart Classic sensors.
N/A
0-10V
CO2 Sensor
0-10V is scaled as defined by the
network input
“CO2 0-10V Output Range”
0-2,000ppm
0-4,000ppm
0-5,000ppm
0-10,000ppm
0-20,000ppm
0-10V
Temperature
Sensor
0-10V is scaled as defined by the
network input
“Temperature Sensor 0-10V Output
Range”
0 - 40°C
0 - 50°C
0 - 80°C
0 - 90°C
0 - 100°C
0-10V
Pressure
Sensor
0-10V is scaled as defined by the
network input
“Pressure Sensor”
0 - 25 Pa
0 - 50 Pa
0 - 100 Pa
0 - 300 Pa
0 - 500 Pa
0 - 1000 Pa
0 - 1600 Pa
0 - 2500 Pa
0 - 3000 Pa
0-10V
Humidity
Sensor
0-10V is scaled to 0-100%
humidity
0 - 100% only
1.6 Fan Speed Control Input
Once assigned to either input 16 or 17, the 0-10V input is scaled to
0-100% fan speed demand.
1.7 CO
Control
When a CO2 sensor is assigned to the system and an enable signal
is received, ventilation will increase fans speeds to reduce CO2
concentration. The target CO2 sensor setpoint can be changed as
one of the commissioning setpoints. Room Module CO2 sensors are
detected automatically. 0-10V CO2 sensors need to be assigned to
input 16 or 17.
1.8 Humidity Control
When a humidity sensor is assigned to the system and an enable signals
received, ventilation will increase fans speed to reduce humidity. The
target humidity setpoint can be changed as one of the commissioning
setpoints. Room Module humidity sensors are detected automatically.
0-10V humidity sensors need to be assigned to input 16 or 17.
1.9 Constant Pressure Control
An extract air pressure sensor is fitted to IN16 standard. IN16 is
disabled by default but constant pressure control can be enabled by
setting IN16 function to 0-10v pressure sensor.
When enabled, the unit will increase the fans speeds as required until
the pressure differential between the extract air and atmosphere
reaches the constant pressure setpoint.
The target pressure setpoint can be changed as one of the
commissioning setpoints. Room Module pressure sensors are not
available.
1.10 Dirty Filter Switch
Filter differential pressure switches are fitted as standard. These
monitor the Extract filter, Supply filters. These are connected into input
IN9 & IN10 and will be open circuit on overpressure. The adjustable
range is 0.5 to 4mbar and is set by the default to 2mbar.
1.11 Configurable Mode (Via Switched Live 2)
The switched live 2 input is a configurable input that can be set to
perform a number of functions. The function is set via the network
input Configurable Mode SL2.
These functions will include the following:
•Fan Boost (Default Setting) - This enables Fan Boost Mode
•Heat Boost - The heater function will be enabled. Fan speeds will
be increased where necessary to keep supply temp at the heater
boost setpoint (Default 35°C).
•Extract Setback - When this mode is selected and SL2 is active,
the unit will force the extract fan to run at Extract Setback Speed
(Commissionable setpoint), regardless of all other demands.
Supply fan will operate at the normal speed. If increased demand
is required (e.g. via CO2 or 0-10v IN16/17 some other input) the
supply fan speed will increase but the extract fan speed will not.
This mode can be used when the unit is used in conjunction with a
separate air system.
1.11.1 Fan Boost
When the control receives a boost signal, from either the network input
“Boost” or “Configurable SL2” configured to boost, the fans will run at
their individual boost speeds. Once the signal is removed the fans will
run on for a time defined by the boost run-on setpoint. Any demand in
excess of the boost speed will be ignored (apart from 3 speed override
and purge schedule).
1.11.2 Heat Boost
When the control receives a heat boost signal, from either the network
input “Heat Boost” or “Configurable SL2” configured to “heat boost”,
the heater output will increase to 100%. The fan speed will be increased
as required to reach the heat boost setpoint.
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