210.100-IOM (JUL 2018)
Page 42
ACUAIR
®
HYGIENIC AIR UNITS
MAINTENANCE
TABLE 1 – FAN BEARING – LUBRICATION INTERVALS - BALL BEARING PILLOW BLOCKS
Relubrication schedule (months)
SPEED (RPM)
500
1000
1500
2000
2500
3000
3500
4000
4500
SHAFT DIA.
1/2" thru 1
ZZ\zn
"
6
6
5
3
3
2
2
2
1
1
ZB\zn
" thru 2
M\zn
"
6
5
4
2
2
1
1
1
1
2
ZZ\zn
" thru 2
ZB\zn
"
5
4
3
2
1
1
1
3
M\zn
" thru 3
ZB\zn
"
4
3
2
1
1
1
TABLE 2 – FAN BEARING – LUBRICATION INTERVALS - SPHERICAL ROLLER BEARING
SOLID PILLOW BLOCKS
Relubrication schedule (months)
SPEED (RPM)
500
1000
1500
2000
2500
3000
3500
4000
4500
SHAFT DIA
1
C\zn
" thru 1
M\zn
"
6
4
4
2
1
1
1
1
1/2
1
ZZ\zn
" thru 2
C\zn
"
4
2
1½
1
1/2
1/2
1/2
1/2
1/2
2
M\zn
" thru 3
M\zn
"
3
1½
1
1/2
1/2
1/2
1/2
3
ZB\zn
" thru 4
ZB\zn
"
2½
1
1/2
1/4
TABLE 3 – FAN BEARING – LUBRICATION INTERVALS - SPHERICAL ROLLER BEARING-SPLIT PILLOW BLOCKS
Grease
to be
added
at each
interval
Relubrication schedule (months)
SPEED (RPM)
500
750
1000
15000
2000
2500
3000
3500
4000
SHAFT DIA
1
M\zn
" thru 1
ZB\zn
"
6
4½
4
4
3½
2½
2½
1
1
0.50 oz
2
C\zn
" thru 2
ZZ\zn
"
5
4½
4
2½
2½
1½
1/2
1/4
1/4
0.75 oz
2
ZB\zn
" thru 3
ZB\zn
"
4½
4
3½
2½
1½
1
1/2
2.00 oz
4
M\zn
" thru 4
ZB\zn
"
4
4
2½
1
1/2
4.00 oz
5
M\zn
" thru 5
ZB\zn
"
4
2½
1½
1
7.00 oz
FAN BEARING LUBRICATION
Standard fan configurations ship with fan bearings factory
lubricated (ready for start-up). The fan should be turned off
and locked out to prevent accidental start-up of the fan during
lubrication procedures. Also, secure sheaves before servicing
the unit to ensure that the fan cannot freewheel. Failure to
do so may result in severe personal injury.
Proper lubrication of bearings helps to assure maximum
bearing life. Generally, lubricate bearings every 1,000 hours of
operation or more frequently when exposed to wet location,
wide temperature variety or severe atmospheric conditions.
Add grease with manual grease gun until a light bead of grease
appears at the bearing grease seal or refer to lubrication
frequency in the Tables 1, 2 & 3. Observation of the condition
of the grease expelled from the bearings at the time of re-
lubrication is the best guide as to whether lubrication intervals
and the amount of grease added should be altered. Always
lubricate bearings prior to extended shutdown or storage and
rotate shaft monthly.
Recommended Lubricant for Fan Bearings
A Lithium / Petroleum base grease conforming to an NLGI
Grade II consistency is normally used. Lubricant must be free
of any chemical impurities such as free acid or free alkali,
dust, rust, metal particles or abrasives. This light viscosity,
low torque grease is rust inhibited and water resistant, has a
temperature range of -30°F to +200°F with intermittent highs
of +250°F. Lubricate bearings as required by the severity of
required duty.
Proper Interval and Quantity -
See Tables 1, 2 & 3
FAN SEGMENT-FAN MOTOR
Keep the motor clean, dry and properly lubricated at all times.
Blow dust and dirt out of windings periodically using low-
pressure (50 psig) air. (Figure 49)
ODP
TEFC
Figure 49 – ODP (Open Drip Proof)
TEFC (Totally Enclosed Fan Cooled)
Mounting Hardware and Adjustable Motor Base
• Inspect for loose parts.
• Inspect for damage.
Motor Condition (Visual)
• Inspect for leaky bearing seals.
• Inspect for damage.
• Inspect for dirt, dust & debris in air vents on motor housing.
Electrical Checks
• Inspect all electrical terminations.
•
Inspect conduit fittings and clamps for damage or looseness.
• Inspect operating amperage and compare to nameplate.
Summary of Contents for AcuAir
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