10
Warning
avoided by purchasing Marley drive systems. If you are installing a VFD other
than a Marley drive, please refer to that drives installation manual.
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 Cooling
Technologies does not assume responsibility for any technical sup-
port or damages for problems associated 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 fluid cooler is operated at speeds which cause
damaging vibrations to the fluid cooler and associated equipment.
When utilizing a variable frequency drive, the fluid cooler 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 fluid cooler fan motor prior
to performing any maintenance on the fluid cooler. 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 . 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 doubleflow models—MHF7111 and MHF7113—install the two-piece
fan guard according to the installation drawing shipped with the fluid
cooler.
Warning
installation
Caution
Warning
