AEC WD 350 through WD3000 Dehumidifying Dryers - Manual (Page 18)

350-2100 cfm Dryers Chapter 3: Installation 17 of 58
Chapter 3: Installation
3-1 Work Rules
The installation, operation, and maintenance of this equipment must be conducted in
accordance with all applicable work and safety codes for the installation location. This may
include, but not limited to, OSHA, NEC, CSA, and any other local, national and international
regulations.
1. Read and follow these operating instructions when installing, operating and
maintaining this equipment. If the instructions become damaged or unreadable,
additional copies are available from the manufacturer.
2. Only qualified personnel familiar with this equipment should work on or with this
dryer.
3. Work with approved tools and devices.
4. Disconnect the electricity before maintenance or service. If the dryer is installed with
a power cord that can be unplugged, unplug it. If the dryer is permanently wired to a
power main, a fused power disconnect must be installed to allow the disconnect to be
locked in the "OFF" position. Open and lock out the disconnect installed in the
control enclosure.
3-2 Electrical Connections
The voltage, phase and amp draw information is listed on the serial tag.
; Line voltage must be within ±10% of the voltage listed on the serial tag, or damage
may occur. Phase imbalance must be less than 5%.
; Fulfill all national, state and local safety and electrical code requirements.
; Connection should be made by a qualified electrician.
; 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.
3-3 Check For Proper Blower Rotation
The blowers are rotating properly when air flows from the delivery outlet.
• Incorrect phasing of power leads will cause backward rotation of blower motors and
contamination of the desiccant.
If both blowers are rotating improperly, reverse any two wires at the fused disconnect outside
the dryer or at the disconnect/terminal in the control enclosure. This assures that both blowers
will be rotating in the proper direction.
• Reverse the wires at the motor starters only if one blower is rotating incorrectly.
3-4 Dryer/Drying Hopper Process Air Hose Connection
; Use high-temperature flexible dryer hose or rigid tubing to connect the dryer to the
drying hopper.