User manual

11
Warning
ImproperuseofaVFDmaycausedamagetoequipmentorpersonal
injury. Failure to correctly install the VFD drive will automatically
voidallwarrantiesassociatedwiththemotorandanyequipment
thatiseitherelectricallyormechanically(directly)attachedtothe
VFD drive system. The length of this warranty avoidance will be
contingent on properly installing the VFD system and repairing any
damage that may have occurred during its operation. SPX Cool-
ing Technologies does not assume responsibility for any technical
support or damages for problems associate with non-Marley brand
VFD systems.
Changing the operational fan speed from the factory settings could
cause the fan to operate in an unstable region which may result in
damagetotheequipmentandpossibleinjury.
Mechanical Equipment:
The fluid cooler is designed to operate at full speed and half speed.
Warranty is void if the tower is operated at speeds which cause
damagingvibrationstothetowerandassociatedequipment.When
utilizingavariablefrequencydrive,thetowermustbetestedacross
the fullrange of speeds andchecked against CTI guidelines for
excessive vibration. Speed ranges not meeting these guidelines
mustbelockedoutintheVFD.
Always shut off electrical power to the tower fan motor prior to
performing any maintenance on the tower. Any electrical switches
shouldbelockedoutandtaggedouttopreventothersfromturning
thepowerbackon.
1. If equipped, check oil level in accordance with the Geareducer User
Manual for the Geareducer. (Although the Geareducer was filled to the
proper level at the factory, tipping during shipment and hoisting may have
caused some loss of oil.) If oil is required, fill Geareducer to the proper
level with approved lubricant. (See Geareducer User Manual ) Check oil
level at the Geareducer or dipstick (standpipe located on fan deck, if so
equipped) to confirm that the proper level is indicated.
2. On double-flow models—MHF706 and MHF707—install fan cylinder and
two-piece fan guard according to the installation drawing shipped with
the fluid cooler.
Warning
➠
Installation
Warning
Warning