AEC HE Mass Flow Series Drying hoppers - Manual (Page 21)

Page 20 HE
• CHE • BCHE Mass Flow Series Drying Hoppers
3-6 Making Electrical Connections
CHE and BCHE Models
• Fulfill all national, state, and local safety and electrical code requirements.
• Connections should be made by a qualified electrician.
• Make sure all electrical connections are tight.
• Install a fused disconnect with a lockout feature in the power main leading to the drying
hopper.
• The power drop must include a ground wire.
1. The power drop is brought to the main electrical enclosure at the drying hopper. Voltage
supplied to the unit must be within 10% of nameplate voltage. Ground the unit.
2. For the temperature controller, make sure the thermocouple is tightly in place at the inlet
of the drying hopper.
3. For CHE drying hoppers, wire the interlock from terminals located in the desiccant dryer
to terminals located in the CHE drying hopper enclosure. Use 14GA yellow wire. Refer
to the electrical diagrams from the dryer and drying hopper for terminal numbers.
4. Any companion equipment used with the drying hoppers will require additional
installation steps. Refer to the appropriate operating literature for this information.
3-7 Checking for Proper Blower Rotation
BCHE Models
The blower rotates properly when air flows from the hopper outlet. Incorrect phasing of power
leads causes backward rotation of blower motors and contamination of desiccant!
If the blowers rotate improperly, reverse any two (2) wires at the fused disconnect outside the
dryer or at the disconnect in the control enclosure.
Caution!
Do not reverse the wires at the motor starters!