NuAire BOXER B815H Series, Installation, Operation & Maintenance Instructions Manual

Page: 16 / 48

nuaire.co.uk 029 2085 8200
BOXER BPS ECOSMART CLASSIC CONTROL (ES)
nuaire.co.uk 029 2085 8200
8.0 SETTING TO WORK USING THE TEST
BUTTON ECOSMART CONTROL
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
Settings
BMS Input signals
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* 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.
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 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
Setting the maximum airflow
Setting the maximum trickle airflow (nominal 40%)
Setting the overrun time
Setting the trickle ventilation facility
Setting the ‘air off’ temperature
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.
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.
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
automatically set to be the same as the maximum.
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.
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.
The adjustment knob is located in the control pack and must be set to the
desired ‘air off’ temperature.
LED indicators
Min Max SL run on
Trickle Test
0 1
Pwr
Standby
Fan 1
Fan 2
Heating
Cooling
Fault
Frost
TX
RX
Co
nnector
Ecosmart
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
Figure 17: Ecosmart commissioning board
*Only available on relevant unit
8.1 ECOSMART FROST PROTECTION
Ecosmart frost protection is activated on any AHU fitted with LPHW heating,
when the outlet air temperature is 4ºC or below.
The unit reacts by shutting down the fan to prevent a ‘wind chill’ effect reducing
the temperature to a point whereby the coil could freeze and burst. The unit will
also drive open the LPHW valve to a fully open position to allow full water flow
through the coil and the main PCB will close the ‘Heat demand’ contacts. These
contacts could be used to send a signal to activate the boiler and/or valve to
open to provide heat if not already doing so.