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OPERATING INSTRUCTIONS
START-UP:
At this point it is assumed that the installation is complete and that the recommendations and instructions
have been followed. The following will outline the proper procedures for starting and adjusting the VFB
dehumidifier.
NOTE:
Before starting the dehumidifier, check to insure that the outlet air dampers are at
least partially opened.
At this point the dehumidifier can now be started using the "HAND-OFF-AUTO" switch. The
"HAND-OFF-AUTO" selector switch can now be set to the "HAND or ON" position. This will start the
dehumidifier, energizing the fan motors, bed drive, and the reactivation heat source. The fan rotations
should be checked at this time, if not previously done, to insure they are rotating in the proper direction (see
below).
VERIFICATION OF PROPER FAN ROTATION (Three Phase):
Apply power to the unit momentarily by placing control switch "CS" in the "HAND or ON" position for
two seconds and then back to the "OFF" position. Verify that the fans are rotating in the right direction (see
direction arrow on fan). If the fans are turning the wrong direction, follow the steps listed below:
1. If both fans are turning the wrong direction, reverse any 2 of the 3 main power leads attached to the
main disconnect switch or power distribution block.
2. If only 1 fan is turning the wrong direction, reverse any 2 of the 3 main power leads attached to the
line side of the motor starter for the fan.
NOTE:
Before changing any wires,
all
electrical power
must
be
shut off and locked out
.
