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15, 30, & 60 cfm Compact Dryers Chapter 3: Installation 21 of 57

3-3 Electrical Connections

When making electrical connections to your dryer, ensure that you take into consideration

and make arrangements for the following:

• A qualified electrician should make all electrical connections.

• Fulfill all national, state, and local safety and electrical code requirements.

• 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%).

• 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.

• Make sure all electrical connections are tight.

3-4 Setup Procedures

This section provides the procedures necessary for configuring your Dehumidifying Dryer.

Configuration of your dryer includes checking for proper blower rotation, making

dryer/drying hopper process air connections and the optional aftercooler (on 15 and 30 cfm

models). We recommend that you carry out these procedures in the order given here.

Note: Before carrying out these procedures, install all equipment as

described in this section.

Checking for Proper Blower Rotation

Three-Phase Models

Caution! 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 hopper!

The blower is rotating properly when air flows from the delivery outlet.

Note: Holding your hand in front of the air return will also indicate if the

blower rotates in the proper direction.

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.

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