NuAire ECOSMART TWINFANS EST-X Guide

Introduction
This leaflet is intended to support the main Installation and
Maintenance Instructions supplied with the fan unit. (Leaflet
Number 671142) available on request from the Nuaire Technical
Library. Telephone: [phone].
Note: These units feature a commissioning box mounted on
the case exterior for your convenience.
The main connections etc are located in the module inside
the fan casing.
1. Getting started
The Ecosmart Twinfan is designed for maximum control
flexibility. Apart from the power supply, an enabling signal is
always required to set the fan running. This enabling signal
can be a switched live signal (connected to the SL terminal of
each fan) or an enabling device plugged in the NET connection
(see table ‘Ecosmart compatible devices’).
If an enabling signal is not available, connect a link wire
between ‘L’ & ‘SL’.
Additional sensor and manual control may be added. For
example: to run the fan with a temperature sensor, connect a
link across L to SL (enabling signal) and connect a temperature
sensor in one of the sockets labelled ‘NET’
The fan will now adjust it’s speed according to temperature.
To obtain manual control, connect a link across L to SL
(enabling signal) and connect a user control in one of the
sockets labelled ‘NET’.
Ecosmart compatible devices
Enabling Devices
ES-PIR: PIR Sensor
ES-TC: 7 day Timeclock
Sensors
ES-TEMP: Temperature Sensor
ES-RH: Humidity Sensor
User Controls
ES-UCF: Fan only control
ES-UCFH: Fan and Heating Control
(heating will only operate within relevant units)
Others
ES-JB: Junction Box (to add extra sensors etc)
ES-AVI: Audio Visual Fault Indication
Note that these Ecosmart devices will affect all the fans linked
using the SELV data cable.
The switched live signal will only affect the fan to which it is
connected.
New devices are constantly in development, please contact us
for latest range details.
1
10. 05. 17. Leaflet Number 671154
COMMISSIONING
ECOSMART TWINFANS
(EST-X/R/B) 1 phase, Direct Drive,
Run & Standby for roof/external use
The EMC Directive
2014/30/EU
The Low Voltage
directive
2014/35/EU
INDOOR USE ONLY
Connection
to Damper
N
L
SL
OP
CL
N
RET
RUN
RUN
FAULT
FAULT
240V 1ph
50Hz mains
supply
NOTE: Remove the link wire if a switched live
signal is present or an enabling device or BMS
is connected to the'NET'
Switch live signal
(if required)
F3
FUSES
F1 & F2 = 20mm * type T fuse for fan 1 and fan 2
F3 = 20mm 1A type T fuse for dampers
F4 = 20mm 1A type T fuse for control circuit
* rated to fan size
NET connections for ECOSMART devices
eg sensors and inter-connections of fans
F4
NET
N
L
Volt Free Contact
RUN signal
Volt Free Contact
FAULT signal
5A resistive
0.5A inductive
Link
wire Fan 2 Fan 1
OV
0-10V
0-10V
signal
from
BMS
Figure 1. Fan Control module connection details. Figure 2 External Commissioning
Box details.
Switched Live Run-On
Timer adjustment
0 = off. 1 = selected
Nuaire: A Trading Division of Polypipe Limited Western Industrial Estate Caerphilly United Kingdom CF83 1NA
T: 029 2088 5911 F: 029 2088 7033 E: [email protected] W: www.nuaire.co.uk

2
Commissioning ECOSMART Direct Drive roof/external Twinfans
2. BMS Signal
The systems response to a 0-10V dc BMS signal is given in the
following table. Note the BMS signal will override any sensors
and user control connected in the system.
The voltage tolerance is +/_ 125mV and is measured at the fans
terminal.
Ventilation mode Cooling mode* Heating mode*
Local control 0.00 - -
OFF/trickle 0.25 - -
Speed 1 0.50 0.75 1.00
Speed 2 1.50 1.75 2.00
Speed 3 2.50 2.75 3.00
Speed 4 3.50 3.75 4.00
Speed 5 4.50 4.75 5.00
Speed 6 5.50 5.75 6.00
Speed 7 6.50 6.75 7.00
Speed 8 7.50 7.75 8.00
Speed 9 8.50 8.75 9.00
Speed 10 9.50 9.75 10.00
* Only available on relevant un
3. Commissioning Procedure
Setting the Maximum air flow
i) Ensure the power supply is switched off and that a link wire
is connected from the supply L to the SL terminal.
Unplug all items connected to the ‘Net‘ connectors.
ii) Switch on the power supply whilst still maintaining access to
the adjustment pots.
NOTE care must be taken as live parts are accessible.
iii) Wait for the fan to complete its self-test operation.
iv) Connect a manometer across the tappings provided on
the outside of the casing. Adjust the pot marked ‘Max’ to its
maximum position. Read the manometer, transfer the pressure
value to the relevant curve and read the volume flow.
Mark the operating point on the curve and draw a parabolic
system line between the origin and this operating point (point A
on fig. 3). Adjust the ‘Max’ pot so that the pressure reading
corresponds with the required airflow (point B of fig. 3).
Setting the Minimum/trickle airflow
(nominally 40%)
i) Repeat the same procedure as for maximum airflow above
but without the link wire between supply L and SL terminal.
Ensure the trickle switch is in the ‘ON’ position.
The adjustment must be made on the pot marked ‘Min’
ii) Note that the minimum setting (nominally 40%) must be
below the maximum setting, otherwise minimum setting will be
automatically set to be the same as the maximum.
After setting the airflows, reconnect all the items disconnected
previously.
Ensure that the cover over the mains terminals is replaced and
that the cover of the controls enclosure is securely fastened.
3. Using the graphs
The graphs are designed to assist in the establishment of the
desired air volume flow rate for the installation.
After the fan is installed in the ventilation system and connected
to the power supply, connect a manometer across the pressure
tappings on the outside of the fan casing. Note that negative
pressure is present at the fan inlet and positive at the fan
outlet; the combined value is required.
Set the fan to run at maximum speed as per commissioning
procedure and take the pressure reading (in Pa) across the fan.
Use the relevant graph for the fan, plot the pressure point and
read the volume flowrate.
For example; if the pressure is 100Pa, draw a horizontal line
from 100Pa until it touches the curve (see fig. 3 point A).
Drop the line vertically down to give the volume flow of the fan.
If it is necessary to adjust the flowrate, draw a parabolic
system line between the origin and the operating point.
Alternatively draw a straight line; this should give a reasonable
estimate in most installations. Draw a straight line from the
required airflow (point C) up to meet the system line (point B)
and read the corresponding pressure value (point D).
Adjust the pot so that the manometer gives the same pressure
reading as point D to obtain the required airflow.
Note that the typical minimum volume achievable with this
fan range is approximately 40%.
10. 05. 17. Leaflet Number 671154
Figure 3. Typical EST graph (size 1 unit shown).
150
50
100
250
200
Pressure across manometer tapping & atmosphere (Pa)
Volume flow (l/s)
0504006030201
Pressure
Reading
Volume
Flow Rate
A
C
DB
0

100
150
200
250
300
50
350
Pressure
Reading
Volume
Flow Rate
Pressure across manometer tapping & atmosphere (Pa)
100
150
200
50
250
Volume flow (l/s)
Pressure
Reading
Volume
Flow Rate
Pressure across manometer tapping & atmosphere (Pa)
100
150
200
250
300
50
350
400
450
Pressure across manometer tapping & atmosphere (Pa)
Volume
Flow Rate
Pressure
Reading
100
150
200
250
300
50
350
400
Volume flow (m3
/s)
Pressure
Reading
Volume
Flow Rate
Pressure across manometer tapping & atmosphere (Pa)
100
150
200
250
50
300
350
Volume
Flow Rate
Pressure
Reading
Pressure across manometer tapping & atmosphere (Pa)
150
50
100
250
200
Pressure across manometer tapping & atmosphere (Pa)
Volume flow (l/s)
0504006030201
Pressure
Reading
Volume
Flow Rate
60
80
100
20
40
140
120
Volume flow (l/s)
080600410210010402
Pressure
Reading
Volume
Flow Rate
Pressure across manometer tapping & atmosphere (Pa)
00
Volume flow (m3
/s)
Volume flow (m3 /s)
0 25 50 75 100 125 150 175 200
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
Volume flow (m3
/s)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
0
0
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
3
10. 05. 17. Leaflet Number 671154
Commissioning ECOSMART Direct Drive roof/external Twinfans
Figure 4. EST 1. Figure 5. EST 2.
Figure 6. EST 3. Figure 7. EST 4.
Figure 8. EST 5. Figure 9. EST 6.
Commissioning Graphs
To be used in conjunction with the commissioning
procedure as detailed on page 2.
Figure 10. EST 8.