6
nuaire.co.uk
029 2085 8400
30. 04. 19. Leaflet Number 671220
Installation and Maintenance
AXUS Circular Long Cased Axial Flow Fans
5.0 Setting To Work
IMPORTANT
Isolation - Before commencing work, make sure
that the unit, switched live and Nuaire controls are
electrically isolated from the mains supply.
Warning - Inverter Speed Control
An inverter is used to provide speed control. When the
fan is isolated, allow 5 minutes for the capacitors in the
inverter to discharge before commencing any work on
the unit.
IMPORTANT
Isolation - Before commencing work, make sure that the
unit, switched live and Nuaire controls are electrically
isolated from the mains supply.
Note that the volt free contacts are not fused. If these are used to
power any external equipment, the installer must provide adequate
fusing or other protections.
5.1 Electrical
5.1.1 Using The Test Button
The test button allows the blower within the unit to be checked for its
operation. If the fan is running already, press the button once to stop
the fan, press again to switch on the fan.
Note that the fan will return to normal operation after 30 seconds.
5.3 Settings
5.3.1 Setting The Maximum Airflow rate
•
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.
•
Switch on the power supply.
•
Wait for the fan to reach steady condition.
Measure the airflow using standard commissioning instruments at
a suitable point in the ductwork.
If adjustment is required, rotate the pot marked ‘MAX’ to obtain
the desired airflow. Remove the link wire if not required (fig. 7).
5.3.2 Setting The Minimum / Trickle Airflow Rate (Nomial 20%)
•
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. Adjustment must be made on
the pot marked ‘Min’.
•
Note that the minimum setting (nominally 20%) must be
below the maximum setting; otherwise minimum setting will be
automatically set to be the same as the maximum.
•
The minimum speed set is the trickle speed at which the fan
operates.
Note: The working speed range of the user control and sensors is
between the minimum and maximum set points.
5.2 LED Indication
PWR
GREEN: Power on & OK.
Standby
LED on when fan is not running.
Fan 1
GREEN: Fan 1 is running, RED: Fan 1 faulty.
Fan 2
GREEN: Fan 2 is running, RED: Fan 2 faulty.
Heating*
Not applicable, see note.
Cooling*
Not applicable, see note.
Fault
LED on when a fault is present on unit.
Frost*
Not applicable, see note.
Tx
LED on when the controller is transmitting data.
Rx
LED on when the controller is receiving data.
* Note that the control panel is common to all the Ecosmart
products and will have indicators for functions that are not
available in this particular fan. However these indicators will not be
illuminated.
Min
= Minimum speed adjustment
Max
= Maximum speed adjustment
SL runon
= Switched live run-on
timer adjustment
Trickle
= Selects trickle running:
0 = off, 1 = selected
Test
= Test button
Max SL runon
Min
Trickle
Test
1
0
Pwr
Standby
Fan 1
Fan 2
Heating
Cooling
Fault
Frost
Tx
Rx
Ecosmart
Connector
LED indicators
Figure 12.
Ventilation Mode
Local Control
0.00
OFF/ Trickle
0.25
Speed 1
0.50
Speed 2
1.50
Speed 3
2.50
Speed 4
3.50
Speed 5
4.50
Speed 6
5.50
Speed 7
6.50
Speed 8
7.50
Speed 9
8.50
Speed 10
9.50
