Making Electrical Connections; Checking For Proper Blower Rotation - AEC AD Series Operation And Installation Manual

4-3 Making Electrical Connections

4-4

Checking for Proper Blower Rotation

Three-Phase Models
CAUTION!
Page 28
The serial tag lists voltage, phase, and amp draw information.
Line voltage must be within plus or minus ten percent (±10%)
of the voltage listed on the serial tag, or damage may occur.
Phase imbalance must be less than two percent (2%).
Fulfill all national, state, and local safety and electrical code
requirements.
A qualified electrician should make all electrical connections.
Make sure all electrical connections are tight.
Connect main power to the dryer at the disconnect or terminals
in the upper right corner of the control enclosure.
Install a fused disconnect with a lockout feature in the power
main leading to the dryer.
The power drop must include a ground wire.
The blower rotates properly when air flows from the delivery
outlet.
In three-phase models, incorrect phasing of power leads
can cause backward rotation of blower motors
and CONTAMINATION OF THE DESICCANT!
Always check blower rotation before putting material in the drying
If the three-phase blower rotates improperly, reverse any two wires
at the fused disconnect outside the dryer or at the
disconnect/terminal in the control enclosure. This assures that the
blower rotates in the proper direction.
Note: Holding your hand in front of the air return will also
indicate if the blower rotates in the proper direction.
hopper!
AD Series Dehumidifying Dryers