23
30. 07. 20. Document Number 671760
Nuaire |
Western Industrial Estate
|
Caerphilly
|
CF83 1NA
|
nuaire.co.uk
BPS V-CO
Installation Manual
8.5 Mutliple 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
8.6 Auxiliary Inputs 4 & 5 (0-10V Inputs)
The function of IN4 & IN5 can be set by the network inputs IN4 Function & IN5
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
8.7 Fan Speed Control Input
Once assigned to either input 4 or 5, the 0-10V input is scaled to
0-100% fan speed demand.
8.8 Ecosmart Gateway Gadget
If an EGG PCB is installed on the system this will give an enable signal
and also a 0-10V fan speed demand. The EGG allows an existing NET
sensor network to give a fan speed demand to a controller.
8.9 CO2
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 4 or 5.
8.10 Humidity Control
When a humidity sensor is assigned to the system and an enable signal
is 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 4 or 5.
8.11 Constant Pressure Control
An extract air pressure sensor is fitted to IN4 standard. IN4 is disabled
by default but constant pressure control can be enabled by setting IN4
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.
8.12 Dirty Filter Switch
3 Filter differential pressure switches are fitted as standard. These
monitor the Extract filter, Supply filter and Supply pre-filter.
These are connected in series with Alarm Circuit 2 (orange wires) and
will break the circuit on overpressure. The adjustable range is 0.5 to
4mbar and is set by the default to 2mbar.
8.13 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).
•
Limit Extract Fan
When this SL2 is selected and active, the unit will force the
extract fan to run at trickle speed, 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 IN4/5 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.
