AAON BL-600 - Manual (Page 31)

31
Where under normal operating conditions
the limit of 68°C/155°F (Restricted Zone)
for
normal touch, or 80°C/176°F
(Unrestricted Zone) for unintentional touch,
may be experienced, steps should be taken
to minimize contact or warn operators/users
that normal operating conditions will be
exceeded. In certain cases where the
temperature of the pumped liquid exceeds
the above stated temperature levels, pump
casing
temperatures may exceed
100°C/212°F and not withstanding pump
insulation techniques appropriate measures
must be taken to minimize risk for operating
personnel.
Storage
Pumps removed from service and stored,
must be properly prepared to prevent
excessive rusting. Pump port protection
plates must not be removed until the pump is
ready to connect to the piping. Rotate the
shaft periodically (At least monthly) to keep
rotating element free and bearings fully
functional.
For long term storage, the pump must be
placed in a vertical position in a dry
environment. Internal rusting can be
prevented by removing the plugs at the top
and bottom of the casing and drain or air
blow out all water to prevent rust buildup or
the possibility of freezing. Be sure to
reinstall the plugs when the unit is made
operational. Rust-proofing or packing the
casing with moisture absorbing material and
covering the flanges is acceptable. When
returning to service be sure to remove the
drying agent from the pump.
Handling Large VIL Units
One effective way of lifting a large pumping
unit is to place lifting hooks through the
motor lifting rings or straps around the
upper part of the motor. The pump and
motor unit will free-stand on the casing ribs.
Remove the coupling guard and place (2)
lifting straps through the pump/motor
pedestal, one on each side of the motor shaft
and secure to the lifting device.
With the straps in place, using a spacer bar if
necessary to protect the motor fan cover, the
whole assembly can now be lifted securely.
Note:
Handling, transportation and
installation of this equipment should only
undertaken by trained personnel with proper
use of lifting equipment.
Remove coupling guard and place lifting
straps on each side of coupling, use spacer
bar if necessary to protect motor fan cover.
Vertical Inline Pump Lifting Strap
Positioning
Note: All split-coupled pumps contain a
tapped hole in the motor bracket above the
discharge flange for draining the well. Pipe
this drain hole to a floor drain to avoid
overflow of the cavity caused by collecting
chilled water condensate or from seal
failure.