9
24. 02. 22. Document Number 671572
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
AVS
Installation Manual
5.4 BMS Input Signals
28
BMS Connector
0-10V
0V
BMS
BMS Input Signals and other low voltage cables should Follow the basic
principles set out in (Section 5.3.6).
The BMS connection is made with a plug-in connector via the socket
(Figure 28). To ensure the connection is made only by suitably qualified
and authorised personnel, the plug is not supplied. It is
available from
R S Components, Part No. 403-875 or Farnell, Part No. 963-021.
Reversal of the BMS connection will damage the control.
The system’s response to a 0-10V dc BMS signal is given in the table
below. The voltage tolerance is +/- 125mV and is measured at the fans
terminal.
The BMS signal will override any sensors and user control
connected in the system.
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.
6.0 CONTROLS
6.1 LED Indication
PWR
GREEN: Power on & OK. RED: To 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*
GREEN: Heating selected RED: Heating faulty.
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.
* 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.
A Commissioning Procedure document (Document No. 671153) is
available on request from Nuaire.
29
Commissioning Panel Details
LED indicators
Max
Min
Trickle
Test
1
0
Pwr
Standby
Fan 1
Fan 2
Heating
Cooling
Fault
Frost
Tx
Rx
MIN =
Minimum speed
adjustment
MAX =
Maximum speed
adjustment
SL run on =
Switched Live Run-On
Timer adjustment
TRICKLE =
Selects trickle running:
0 = off, 1 = selected
TEST
=
Test button
SL run on
6.2 Using Test Button
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.
The fan will return to normal operation
after 30 seconds.
6.3 Setting Unit Airflow
6.3.1 Maximum Airflow
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.
Ensure unit cover is securely attached.
Wait for the fan to complete its self-test operation.
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.
6.3.2 Minimum Trickle (Nominally 40%)
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’.
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.
