SPX Cooling Technologies 98-1514E user manual Motor Wiring, When using a starter

Installation

Normally, one of the following two inlet arrangements is provided:

Standard distribution basin connections: There is a circular opening in the top deck of the tower near the air inlet face, drilled to accept standard 125# flat-face flange. Remove the center inlet flume as- sembly to gain access to attach inlet fasteners. (Refer to the AV Field Installation Manual shipped with tower.)

Marley flow-control valve connection (option): The Marley flow- control valve is designed to 1–take the place of a standard elbow normally required for inlet connection, and 2–provide means of regu- lating flow between individual cells. Remove the center inlet flume assembly to gain access for attachment of valve. (Refer to the AV Field Installation Manual shipped with tower.) The valves provides a vertical face for attachment of your standard 125# flange.

12.Wire motor in accordance with wiring diagram on motor nameplate. Check motor connections and power supply voltage versus motor nameplate voltage.

Warning	For maintenance/safety purposes, SPX Cooling recommends a lockout
	type disconnect switch for all mechanical equipment.

In addition to a disconnect switch, the motor should be wired to main power supply through short circuit protection, and a magnetic starter with overload protection.

Motor Wiring

Wire motor leads as shown on the motor nameplate matching the supply voltage. Do not deviate from the motor nameplate wiring.

Either of following symbols may be shown on the motor nameplate – Δ, Δ Δ, Y, or YY. These symbols represent how the motor is constructed on the inside and in no way have anything to do with a Delta or Wye electrical distribution system serving the motor.

When using a starter:

•Set motor overload protection to 110% of motor nameplate amps.

This setting allows the fan motor to operate during cooler weather. During cooler weather it is common for the motor to draw 6 to

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