4
21. 10. 16. Leaflet Number 671169
Installation and Maintenance
ECOSMART Squrbo Fans
4.0 Setting to Work
Using the 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 fan.
Note that the fan will return to normal operation after
30 seconds.
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* GREEN: Heating selected RED: Heating faulty.
Cooling* Not applicable. See note.
Fault
LED on when a fault is present on unit.
Frost alarm - contacts close when air off temperature is 4
0
C
or below. Fan shuts down, valve opens and the heat demand
contacts activated.
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.
BMS Input Signals
The system’s 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
Settings
Setting the maximum air flow
ii) 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.
iii) Wait for the fan to complete its self-test operation.
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 (nominal 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. 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 auto-
matically set to be the same as the maximum.
Setting the overrun time
A switched live of 100-230V at terminal SL will activate the fan.
When the switched live signal is removed the fan will overrun for
period set by the dial ‘SL run on’ - adjust the desired overrun time
by rotating clockwise.
Setting the trickle ventilation facility
Slide the ‘trickle’ switch 0 = Off, 1 = On. With ’trickle’ on and power
to unit the fan will run at minimum speed until the switch live
signal activates it to boost.
Setting the ‘air off’ temperature
The adjustment knob is located in the control pack and must be set
to the desired ‘air off’ temperature.
Figure 9.
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
LED indicators
Min Max SL run on
Trickle Test
0 1
Pwr
Standby
Fan 1
Fan 2
Heating
Cooling
Fault
Frost
Tx
Rx
Ecosmart
Connector
Isolation - Before commencing work make sure
that the unit, and Nuaire control are
electrically isolated from the mains supply.
