IM-995
Installation, Operation & Maintenance Manual
20
Optional Accessories (cont.)
Oil Circulation Systems:
a. Use non-detergent, turbine grade oil specified on the general accessory drawing.
b. Utilize the drain ports specified on the general accessory drawing.
c. There must be a slope of 15 degrees or ½" slope per foot to effectively drain the bearing and minimize leakage.
d. Drain lines should be vented at the highest point above the bearing centerline.
e. Piping must be flushed to leave no residue on a 20 micron filter.
f. Return piping should be heat traced to maintain flow in cold conditions.
g. Minimum fan-start oil temperature to be 70° F.
h. Maintain 110-130° F inlet oil temperature during operation.
i. If a heat slinger is supplied, place vanes facing away from the bearing to prevent oil from being drawn out of the bearing.
j. Oil flow must be established by measuring quantity vs time (gpm) at the bearing drain. Too much oil flow can cause
unwanted leakage. Oil flow rate is found on the general assembly drawing.
9. Site-Feed Oilers
— Fans provided with optional, site-feed oilers, the oil level is to be set as indicated by the manufacturer’s
installation instructions provided with the fan.
10. Concrete Filled Bases:
Inertia Bases
– Inertia bases are spring isolated bases specifically designed to be filled with concrete (by others). The following
instructions are a guide for filling a base with concrete. Remember to use safe practices when filling concrete into the base. It
is best to fill concrete at or near the base’s final resting area to reduce injury while transferring to the permanent location.
An inertia base is supplied with steel mesh or rebar added within the base frame with the intent of being filled with concrete
and then mounted on springs. Bases may be supplied with or without an optional bottom pan (sealer sheet).
When an optional bottom pan is supplied from the factory, the base must be set on a flat, level surface with the bottom pan
directly on the surface fully supporting the pan to maintain flatness on the bottom side. Pour concrete into the base and
remove excess concrete on the top side of the base to maintain an even mounting surface for fan mounting. Be sure that
the concrete has cured before lifting the base. Install isolators per the isolator installation manual.
When the optional bottom pan is not supplied, the base must be set on a flat, level surface that can fully support the weight
of the concrete. Place a sheet of heavy-mil poly-film between the flat surface and the base frame. Pour concrete into the base
and remove excess concrete on the top side of the base to maintain an even mounting surface for fan mounting. Be sure that
the concrete has cured before lifting the base. Install isolators per the isolator installation manual.
Optional Bottom Pan
Plastic
Sheeting
Click To View Our
Inertia Base Installation Video
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