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BMS Control or Centralised Controller
On the Mitsubishi Electric Interface PCB check that the BMS Fan-Run Connection is
plugged into position CNX1 (as shown on previous page and Wiring Diagram). The
dip switches on the Interface PCB are factory set for BMS Control, check they are as
follows:
1
2
3
4
5
6
ON
OFF
SW1
7
8
Black rectangle indicates moveable head of dip switch
1
2
3
4
5
6
ON
OFF
SW2
7
8
1
2
3
4
5
6
ON
OFF
SW3
7
8
Connect a computer running the appropriate software to the Mitsubishi Electric
outdoor unit. Switch on electrical power to both the Mitsubishi Electric outdoor unit
and the Air Curtain. WARNING! Interface PCB will have 230 volts on it.
Communication between the Mitsubishi Electric Outdoor Unit and the Air Curtain
commences approximately 30 seconds after power-up. After this time switch on the
air curtain using the 'On Off Write' parameter of the BMS software.
Once the air curtain fans are operating check that they run at Low (I), Medium (II) and
High (III) speeds using the manual 3 speed fan switch inside the left hand end of the
air curtain. Check there is no mechanical noise coming from the fans and that all fans
are working. Select the fan speed appropriate to the site conditions and leave on this
setting. LEDs 1, 2, 3 and 5 on the Interface PCB should be lit.
Set the BMS 'Mode' parameter to 2. Provided the return air temperature is below
28ºC the air curtain should now be operating in heating mode. Check that the air
stream from the discharge warms up across the whole length of the air curtain after
approximately 20 minutes and that the air stream reaches right down across the
doorway with the door open or closed. If necessary the vanes of the discharge grille
can be angled either inwards or outwards if this gives better penetration/warming of
any incoming draughts. Set up the BMS schedule. It is possible to:
•
switch the Air Curtain on and off
•
determine whether the Air Curtain is operating
•
monitor the Return Air Temperature
•
monitor any Mitsubishi Electric system errors
•
read/write the Mitsubishi Electric Outdoor Unit Mode (heating or ambient)
Note 1:
The
'Mode' parameter should only be set to '2' (heating) or '6' (Fan-
Ambient)
. The system is designed for heating or Fan-Ambient only, using other
'Mode' settings will result in incorrect operation or malfunction.
Never set the 'Mode'
parameter to '1' (cooling)
as the air curtain is not designed to cope with
condensate.
Note 2
: The
set point and fan speed of the air curtain cannot be altered
through
the BMS or Centralised Controller. The set point is hard coded to 28ºC
*
via dip
switch SW2 on the Mitsubishi Interface PCB in the air curtain. The fan speed is set
manually at commissioning using the 3 speed fan switch inside the air curtain (see
above).
*
for Set Point 26°C use dip switch settings SW2-3 ON, SW2-4 OFF, SW2-5 ON
*
for Set Point 24°C use dip switch settings SW2-3 OFF, SW2-4 OFF, SW2-5 ON
Switch off the electrical power to the Mitsubishi Electric Outdoor Unit and Air Curtain.
Carefully slide the Interface PCB back into place, replacing the Filter Indication
