BAC SP2B series, Rigging And Installation Instructions

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3. MANUAL INVERTER OPERATION: by pressing "HAND ON" on the inverter's LCP, the fans start at the
minimum rpm at which the inverter was programmed. By pressing arrow key up "↑" on the LCP, the maximum
programmed rpm can be reached and by pressing arrow key down "↓" the rpm can be reduced to the minimum
programmed rpm. At this stage the fans' rmp are not regulated by any control device. Check the fan rotation (all
fans are factory wired to run in the same direction). Change phases if necessary to obtain correct fan rotation,
as shown by arrow on the fan cowl.
4. By pressing key "OFF" the inverter stops the fan operation.
5. AUTOMATIC OPERATION: the "Remote Start" must be wired to the remote operation via terminals Y2:1 and
Y2:2 and the control operation switch DINV on the front panel to the A-position (automatic operation) before the
inverter is operated through the "AUTO-ON" key. Once the inverter starts, it will now be controlled ty the input
feed of the immersion temperature sensor, regulating the fan rpm accordingly.
6. The unit will now operate according to the load demand. When the inverter reaches the maximum speed, the
controller will activate the adiabatic system by energising/de-energising the appropriate solenoïd valves.
7. A set of clean contacts (1,2,3) from the inverter are wired to the Y6 location of the terminal strip, for remote
observation of the inverter status.
EMERGENCY STOP
A red mushroom switch S
0
S
1
on the front panel is provided to allow the unit emergency stop in case of
malfunction. The unit can be re-started by rotating the
S
0
S
1
emergency switch, as shown by its arrow and then following the starting procedure of the unit.
WEEK-END OR TEMPORARY SHUTDOWN
The unit must shut down by the inverter's "OFF-STOP" key, or by the "Remote Start" off command, or by the
control operation switch DINV on the front panel, so that the drain valve VD1 will remain open and the city valve
VH1 closed.
If the unit is shut down by the main power switch, all the valves will close, risking stagnant water in the
copper tubes.
W W W . B A L T I M O R E A I R C O I L . C O . Z A
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5 Inspection Prior to Start-up
5 Inspection Prior to Start-up