Service And Maintenance; Periodic Service And Maintenance; Ball Bearing Lubrication - Daikin Destiny VFD Series Installation And Maintenance Manual

Indoor air handler

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Table Of Contents

Table of Contents

Periodic Service and Maintenance

1. Check all moving parts for wear every six months.

2. Check bearing collar, sheave, and wheel hub setscrews,

sheave capscrews, and bearing hold-down bolts for

tightness every six months.

Ball Bearing Lubrication

1. Motor bearings—All ball bearings are prelubricated and do

not require additional grease during installation. However,

periodic cleaning out and renewal of grease is necessary.

Exercise extreme care when cleaning to prevent foreign

matter from entering the bearing. It is also important to

avoid over greasing. Only use a high grade, clean mineral

grease with the following characteristics.

a. Melting point preferably over 302°F (150°C).

b. Does not separate by oil and soap under operating

and storage conditions.

c. Free of abrasive matter, acid, alkali, and moisture.

d. Specific greasing instructions are located on a

label attached to the fan section door.

2. Fan shaft bearings—All ball bearings are prelubricated

and do not require additional grease during installation.

Periodic greasing is necessary. Bearings are accessible in

the fan section. A grease fitting is located on each side of

the fan shaft. Do not over lubricate. Wipe off any excess

grease to prevent overheating. The lubrication interval

varies with the period of operation and temperature of the

ambient air. Use the guidelines in the

IM 782-12 • DESTINY AIR HANDLERS

Table 35: Bearing Operating Temperature Range

Table 36: Lubricants Recommended for Fan Shaft Ball

Bearings

Keystone Ind. Lubricants

Exxon Company, U.S.A.

NOTE:Temperature ranges over 225°F are shown for lubricants only. High

temperature applications are not suitable for standard air handler components.

Figure 48: Fan Shaft Bearing Grease Fitting

Table

36.