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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# at-face ange. Remove the center inlet ume as-
sembly to gain access to attach inlet fasteners. (Refer to the AV Field
Installation Manual shipped with tower.)
Marley ow-control valve connection (option): The Marley ow-
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 ow between individual cells. Remove the center inlet ume
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# ange.
12. Wire motor in accordance with wiring diagram on motor nameplate.
Check motor connections and power supply voltage versus motor
nameplate voltage.
Formaintenance/safetypurposes,SPXCoolingrecommendsalockout
typedisconnectswitchforallmechanicalequipment.
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
Warning
Installation