11
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 ex-
cessive 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.
Improper installation of the fan cylinder and fan guard will destroy the
structural integrity of the fan guard. Failure of the fan guard could allow
operating or maintenance personnel to fall into the rotating fan.
3. Spin the fan(s) manually to assure that all fan blades properly
clear the inside of the fan cylinder. If equipped, observe the ac-
tion of the coupling (or drive shaft couplings) to be sure that the
motor and Geareducer are properly aligned. If necessary, cor-
rect the alignment in accordance with the included manual.
For belt drive equipped models observe the action of the sheaves and
belts to be sure that the motor is properly aligned with the fan sheave.
See Belt Tensioning and Sheave Alignment on pages 22 thru 24.
Warning
➠
Installation
Warning
Warning
