SPX Cooling Technologies none Manual

A SERVICE OF

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6. Attach process ﬂuid supply and return piping to the coil. Standard ﬁeld

piping connection is an NPT male connection at the coil. A ﬂanged

connection requires a gasket between the ﬂuid cooler and the ﬂuid

supply piping.

Forweldedconnectionsprotectadjacentareasfromexcessiveheat

andsparksordamagemayoccur.

7. Wire motor(s) and recirculation pump(s) in accordance with wiring

diagram.

For maintenance/safety purposes, SPX Cooling Technologies recom-

mends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

10%higherthannameplateamps.Highampsarecommonduring

tower commissioning when the tower is dry and the ambient air

temperature is cool.

• Donotstartthemotormorethansix times per hour. Short cycling

the tower will cause fuses, breakers or O.L.s to operate and will

decrease motor life.

Caution

Warning

Installation