33
Make sure power is removed from
the unit before performing the main-
tenance items contained in this sec-
tion.
GENERAL
A planned program of regularly sched uled main te nance
will return div i dends by avert ing possible costly and
un ex pect ed pe ri ods of down time. It is the responsibility
of the owner to pro vide the necessary main te nance
for the air handling units and coils. If a system failure
oc curs due to improper main te nance during the warranty
pe ri od, YORK will not be liable for costs in curred to
return the unit to sat is fac to ry operation.
PERIODIC MAINTENANCE – MONTHLY
Filters
Check the cleanliness of the fi lters and replace or clean
as required.
Linkages
If the unit is equipped with an air side economizer
examine the damper and the operator linkages to insure
that each is free and operating smoothly.
Fan Bearing Lubrication
Add grease slowly with shaft rotating until a slight
bead forms at the seals. If necessary, re-lubricate while
bearing is stationary.
Refer to Table 10 for lubricating
schedule.
Relubrication is generally accompanied by a temporary
rise in operating temperature. Excess grease will be
purged from the seals.
Recommended Lubricant for Fan Bearings
A Lithium / Petroleum base grease con form ing to an
NLGI Grade II consistency is nor mal ly used. Lu bri cant
must be free of any chem i cal im pu ri ties such as free
acid or free alkali, dust, rust, metal particles or abrasive.
This light viscosity, low torque grease is rust inhibited
and water resistant, has a tem per a ture range of -30°F
to +200°F with intermittent highs of +250°F. Lubricate
bearings as re quired by the se ver i ty of required duty.
PERIODIC MAINTENANCE – THREE TO SIX MONTHS
Disconnect and lock-out power from
the unit anytime service is being per-
formed on the fan sec tion. Failure to
do so could re sult in serious in ju ry or
death due to the fan turning on while
work is in progress.
Squealing belts during starting is
caused by slip ping belts that are not
tensioned prop er ly.
Motor Bearing Lubrication
Bearings must be re-lubricated periodically to assure
long life. Motor bearing should be lubricated yearly,
but may need lu bri ca tion more fre quent ly, depending
on se vere operating conditions.
TABLE 10 – FAN BEARING – LUBRICATION INTERVALS
RELUBRICATION SCHEDULE (MONTHS) BALL BEARING PILLOW BLOCKS
SPEED (RPM)
500
1000
1500
2000
2500
3000
3500
4000
4500
SHAFT DIA
1/2” thru 1-11/16”
6
6
5
3
3
2
2
2
1
1-15/16” thru 2-7/16”
6
5
4
2
2
1
1/2
1/4
1/4
2-11/16” thru 2-15/16”
5
4
3
2
1
1/2
1/2
3-7/16” thru 3-15/16”
4
3
2
1
1/2
1/2
4
JOHNSON CONTROLS
FORM 145.05-NOM2 (807)
SECTION 4 – MAINTENANCE
Summary of Contents for YSCD
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