BAC DCV Series Rigging And Installation Instructions page 24

2. Turn the main power switch Q0 (and the "Start" button of the General Contactor Relay K0 if ordered as option)
"on" to power the inverter; its LCP (Local Control Panel) is energised. Turn powerswitch QBO to position I, and
the fans are powered by the inverter (in position "II" the fans are powered directly from the mains, bypassing the
inverter). Note: When inverter is bypassed by switch QBO, the fan motors should be started gradually by
turning switches F1, F2, F3 etc. one by one. Place the main fuses FA1, FA2, FA3 to the "on" position. The
amber indicating lamp on the front panel lights up. Put the Circuit Breakers F1, F2, F3 etc.in the "on" position.
3. MANUAL INVERTER OPERATION: by pressing "HAND ON" on the inverter's LCP, the fans start at the
minimum rpm at which theinverter was programmed. By pressing arrow key "↑" on the LCP, the maximum
programmed rpm can be reached and by pressing arrow key "↓" the rpm can be reduced to the minimum
programmed rpm. At this stage the fans' rpm 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 before the inverter is operated through the "AUTO-ON" key. Once the inverter starts,it will now be
controlled by the input feed of the pressure sensor,regulating the fan rpm accordingly.
6. Turn on electric solenoid valve switch DV to power supply theSolenoid valves.
7. The unit will now operate according to the load demand. When the inverter reaches it's maximum fan speed, it
will activate the adiabatic system by energising/de-energising the appropriate solenoid valves.
8. A set of dry contacts (1,2,3) from the inverter are wired to the Y6 location of the terminal strip, for remote
observation of the inverter status.
9. Each fan contactor relay K1, K2 etc. has a set of clean contacts wired to the Y7 location of the terminal strip,
for remote observation of the status of each fan.
10. RS485 terminals are brought to location Y8 of the terminal strip for communication with the inverter.
EMERGENCY STOP
A red mushroom switch S
The unit can be re-started by rotating the S
starting procedure of the unit.
WEEK-END OR TEMPORARY SHUTDOWN
The unit must shutdown by the inverter's "OFF-STOP" key, or by the "Remote Start" off command, so that the
drain valves VD1 and VD2 will remain open and the city valves VH1 and VH2 closed.
If the unit is shut down by the main power switch, all the valves will close, risking stagnant water in the
copper tubes.
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W W W . B A L T I M O R E A I R C O I L . E U
on the front panel is provided to allow the unit emergency stop in case of malfunction.
0
emergency switch, as shown by its arrow and then following the
0