American Dryer Corp. AD-310 Phase 7 Tilting User Manual

Page 35

3. Electrical Connections

NOTE: A wiring diagram is included with each dryer and is located in the blueprint pocket

inside the left side control cabinet.

The main electrical input connections to the dryer are the 3-phase (3ø) power leads (L1, L2, and L3),
GROUND, and in the case of 4 wire service, the Neutral. The electrical connections are made at the power
distribution block located in the base front electrical enclosure.

If the dryer has an optional sprinkler circuit then a separate single-phase (1ø) source must be supplied to
the sprinkler circuit at the name plate voltage. These connections are made at the power distribution block
located in the base front electrical enclosure.

The main electrical (3-phase [3ø]) connections (L1, L2, and L3) and the optional (single-phase [1ø])
connection must be provided and installed in accordance with state and local codes. In the absence of
these codes, grounding must conform to applicable requirements of the National Electrical Code ANSI/
NFPA NO. 70-LATEST EDITION, or in Canada, the installation must conform to applicable Canadian
Standards: Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION (for Electrical
Connections).

NOTE: A CIRCUIT SERVICING EACH DRYER MUST BE PROVIDED.

4. Main Grounding

Grounding (earth) connections must be provided and installed in accordance with state and local codes. In
the absence of these codes, grounding must conform to applicable requirements of the National Electrical
Code ANSI/NFPA NO. 70-LATEST EDITION, or in Canada, the installation must conform to applicable
Canada Standards: Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION (for
Electrical Connections). The ground connection may be to a proven earth ground at the location service
panel.

NOTE: A grounding connection (terminal lug) is provided in the dryer in the base electrical

junction box.

For added personal safety, when possible, it is suggested that a separate ground wire (sized per local codes)
be connected from the ground connection of the dryer to a cold water pipe. DO NOT ground to a gas or
hot water pipe. The grounded cold water pipe must have metal to metal connections ALL the way to
electrical ground. If there are any nonmetallic interruptions, such as a meter, pump, plastic, rubber, or other
insulating connectors, they must be jumped out with no. 4 copper wire and securely clamped to bare metal
at both ends.

IMPORTANT: For personal safety and proper operation, the dryer must be grounded. For

proper operation of the microprocessor controller (computer), an earth (zero)
ground is required.

NOTE: Grounding via metallic electrical conduit (pipe) is not recommended.