For good EMC engineering practice, any sensor cables
or switched live cables should not be
placed within 50mm of other cables or on the same
metal cable tray as other cables.
4
16. 06. 15. Leaflet Number 671142
Installation and Maintenance
ECOSMART Direct Drive Roof Mounted Twinfans
Connections continued.
NOTE: A Commissioning Procedure document (leaflet No.
671154) is available on request from the Nuaire Technical
Library Tel: 02920 885911.
2.0 Using the Test button
(see fig. 6).
The test button allows the individual blowers 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
standby fan, press again to stop and so on.
Note that the fan will return to normal operation after
30 seconds.
3.0 LED Indication
(see fig. 6).
PWR
GREEN: Power on & OK. RED:Too much power
is taken by peripherals or there is a short circuit in
the net cable. Check the cable and use a junction
box (ES-JB) to connect some of the peripherals.
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.
4.0 BMS input signals
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 unit
5.0 Setting the airflow
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.
Note: Ensure unit cover is securely attached.
iii) Wait for the fan to complete its self-test operation.
iv) Remove the cover of the units external commissioning box.
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.
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, re-connect 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.
Table 6.
Fig. 6 External Commissioning Box details.
