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3. Electrical Connections
NOTE: A wire diagram is included with each dryer and is affixed to the back side of the top control
(access) door.
The only 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. These electrical connections are made at
the terminal block located in the service/relay box at the
rear, upper left hand corner of the dryer. To gain access
into this service box, the service cover must be
removed.
The “LINE POWER” and the “GROUND” connections
to the dryer must be made through the knockout hole at
the top of the electric service/relay box. A strain relief
must be used where the line power ground wires go
into the electric service/relay box.
Providing local codes permit, power connections to the dryer can be made by use of a flexible underwriters
laboratory (U.L.) listed power cord/pigtail (wire must conform to ratings of the dryer), or the dryer can be
hard wired directly to the service breaker. In
ALL cases, a strain relief must be used where the wire(s)
enter the dryer electrical service (relay) box.
NOTE: A CIRCUIT SERVICING EACH DRYER MUST BE PROVIDED.
4. Grounding
A ground (earth) 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
Canada Standards: Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION. 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’s electrical service/relay box at
the rear, upper left hand corner of the dryer.
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 grounded cold water pipe. DO NOT ground to
a gas pipe or hot water pipe. The grounded cold water pipe must have metal to metal connection ALL the
way to the 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.