210.100-IOM (JUL 2018)
Page 43
ACUAIR
®
HYGIENIC AIR UNITS
MAINTENANCE
TABLE 5 – MOTOR BEARING – SERVICE CONDITIONS
SEVERITY OF SERVICE
AMBIENT TEMP MAX
ATMOSPHERIC CONTAMINATION
TYPE OF BEARING
STANDARD
40°C
CLEAN, LITTLE CORROSION
DEEP GROOVE BALL BEARING
SEVERE
50°C
MODERATE DIRT, CORROSION
BALL THRUST, ROLLER
EXTREME
>50°C* OR
CLASS H INSULATION
SEVERE DIRT, ABRASIVE DUST
ALL BEARINGS
LOW TEMPERATURE
<-30°C**
CORROSION
* Special high temperature grease is recommended.
NOTE that high temperature grease may not mix with other
grease types.
Thoroughly clean bearing and cavity before adding
grease.
** Special low temperature grease is recommended.
TABLE 4 – MOTOR BEARING – LUBRICATION INTERVALS
NEMA / (IEC) FRAME SIZE
Rated speed - rpm
10,000
6,000
3,600
1,800
1,200
900
UP TO 210 INCL (132)
**
2,700 hr
5,500 hr
12,000 hr
18,000 hr
22,000 hr
OVER 210 TO 280 INCL. (180)
3,600 hr
9,500 hr
15,000 hr
18,000 hr
OVER 280 TO 360 INCL. (180)
*2,200 hr
7,400 hr
12,000 hr
15,000 hr
OVER 360 TO 5,800 INCL. (180)
*2,200 hr
3,500 hr
7,400 hr
10,500 hr
* Lubrication intervals are for ball bearings For roller bearings, divide the listed lubrication interval by 2
** For 6205 and 6806 bearings For 6807 bearings, consult oil mist lubrication (MN410)
Relubrication interval for 6205 bearing is 1,550 hr (Using grease lubrication)
Relubrication interval for 6806 bearing is 720 hr (Using grease lubrication)
TABLE 6 – MOTOR BEARING LUBE INTERVAL MULTIPLIER
SEVERITY OF SERVICE
MULTIPLIER
STANDARD
1.0
SEVERE
0.5
EXTREME
0.1
LOW TEMPERATURE
1.0
Lubrication
Motor Bearing Lubricant -
Bearing grease will lose its
lubricating ability over time. The lubricating ability of grease
depends primarily on the type of grease, the size of the
bearing, the speed at which the bearing operates and the
severity of the operating conditions. Good results can be
obtained if the following recommendations are used in your
maintenance program:
• A high-grade ball or roller bearing grease should be used.
Recommended grease for standard service conditions is
Polyrex EM (Exxon Mobil).
– Maximum operating temperature for standard motors =
110°C.
– Shutdown temperature in case of a malfunction = 115°C.
• Proper Lubrication Intervals – Recommended lubrication
intervals are shown in Table 4. It is important to realize
that the recommended intervals of Table 4 are based on
average use. Refer to additional information contained in
Tables 5 and 6.
• Motor Lubrication Procedure
(Figure 50)
CAUTION
Be sure that the grease you are adding to the motor is
compatible with the grease already in the motor. Consult
your distributor or an authorized service center if
grease
other than the recommended type is to be used.
CAUTION
To avoid damage to motor bearings,
grease must be kept
free of dirt. For an extremely dirty environment, contact
your distributor or an authorized Service Center for ad
-
ditional information.
– With Grease Relief Plug
1. Clean all
grease fittings.
2. Remove grease relief plug.
3.
Add only the recommended amount of grease.
4. Reinstall grease relief plug
Figure 50 – Grease Fittings
Summary of Contents for AcuAir
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