5
24. 03. 22. Document Number 671433
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
ES-ISCT
Installation Manual
5.3.9 BMS input signals
The BMS connection is made with a plug-in connector via the socket
(see fig. 9). To ensure the connection is made only by suitably qualified
and authorised personnel the plug is not supplied
(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 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.
0 - 10V
0V
BMS
8
BMS Plug
System
Response
Ventilation
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
LED indicators
Min
Max SL run on
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
9
Control Panel
6.1 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.
The fan will return to normal operation after 30 seconds.
6.2 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 (Twin fan only).
Heating*
Not applicable. See note.
Cooling*
Not applicable. See note.
Fault
LED on when a fault is present on unit.
Frost*
Applicable with LPHW only. 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 classic products
and will have indicators for functions that are not available in this
particular fan. However these indicators will not be illuminated.
6.3 Settings
6.3.1 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 - see “wiring (c)”.
6.3.2 Minimum / Trickle Air Flow 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’.
•
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.
The working speed range of the user control and sensors is
between the minimum and maximum set points.
