IMPORTANT! Locate Your ELECTRICAL SCHEMATIC DIAGRAMS: They represent the control wiring circuit, also known as a ladder-type diagram. The Schematic clearly shows how the various controls are interlocked and allows a qualified electrician to quickly troubleshoot electrical problems or malfunctions. These are found at the end of this Manual, the Owner/Operator Manual MFH1932, and Controller Installation Manuals MFH1977 and MFH1978.

IMPORTANT! Dryer installations and all components SHALL MEET the National Fire Protection Association Standard 61B (for the prevention of fires and explosions in grain elevators and facilities handling bulk raw agricultural commodities) and Standard 70, as well as the National Electric Safety Code, American National Standard Inst. ANSI-C1, and all other applicable state and local requirements.

Brock® Grain Systems neither assumes responsibility for the electrical wiring used with this Dryer, nor will be liable for damage to the Dryer because of improper electrical installation or use. Improper installation or use will void the Warranty.

Your SUPERB® Dryer is completely factory pre-wired. Locate the Wiring Diagrams in your project packet. After proper installation, keep them in a handy place for future reference in case of the need for service.

On both single-phase and three-phase models, power wires connect to the lugs at the top of the Dryer Disconnect Circuit Breaker. Dryers are normally wired for 230-volt single-phase or 230 / 460-volt three-phase power. However, 208V, 380V, 415V, or 575V three-phase models are also available.

SAFETY requirements

Contact your power provider before installation. They can determine if any adjustments in their lines will be necessary to accommodate the increase in load the Dryer will make on the current wiring. Adequate electrical service must be supplied. The main power transformer must be sized to handle maximum Dryer- connected horsepower see Electrical Specifications Table click link below, plus all other auxiliary conveyor and grain center Motors that operate simultaneously. Low voltage may cause Motor and Control damage, voiding the Manufacturer’s Warranty.

Do not jeopardize your SAFETY or your BROCK® Dryer Warranty with improper electrical installation. Your Installer should have your electric company check the transformer and lead wires. Be sure the wires are of an adequate gauge to carry the load of your Dryer Motors, including starting and full load operating conditions. Failure to follow these instructions will result in death or serious injury.

IMPORTANT! It is the RESPONSIBILITY of the Contractor, Installer, Owner and Operator to supplement the Dryer furnished by Brock® Grain Systems with any necessary ELECTRICAL or STRUCTURAL items to make the Dryer installation comply with the above codes.

IMPORTANT! Review and always follow the “Electrical Connection/Disconnection  Procedures for Dryer Testing” (page 74), and the “Manufacturer’s Recommended Minimum Lockout/Tagout Energy Control Procedures” see main menu.

Lockout SAFETY Switches

IMPORTANT! A LOCKOUT device/lockable disconnect switch must be installed on Dryer Control enclosures containing hazardous voltage wiring.

IMPORTANT! To prevent a hazardous condition, all SAFETY devices, including wiring of electrical devices shall be arranged to operate in a “FAIL-SAFE” manner.

That is, if a power failure or failure of the device occurs, a HAZARDOUS CONDITION will not result.

To prevent a hazardous condition, the machine and all associated equipment MUST be PREVENTED FROM RESTARTING on its own after a power failure when power returns or a jam is cleared. A MANUAL re-start is required.

Do not install or use any method to start or restart the Dryer which bypasses factory- installed SAFETY features.

IMPORTANT! To guard against electrical shock, all Dryers shall have a GROUND connection.