FORM 100.10-NOM2
41
YORK INTERNATIONAL
MAINTENANCE
GENERAL
A planned program of regularly scheduled maintenance
will return dividends by averting possible costly and un-
expected periods of down time. It is the responsibility
of the owner to provide the necessary maintenance for
the air handling units and coils. If a system failure oc-
curs due to improper maintenance during the warranty
period, YORK will not be liable for costs incurred to
return the unit to satisfactory operation.
Removal access doors have been provided on all units
to enhance performance of necessary maintenance and
to provide access to various components which in time
may require replacement.
PERIODIC MAINTENANCE
Every Month
Every month, check the cleanliness of the filters and
replace or clean as required. (See Tables 12 - 14). Ex-
amine the damper and operator linkages to insure that
each is free and operating smoothly.
Every One To Six Months
Fan Bearing Lubrication (See Table 8)
– Fan bear-
ings on the CurbPak units may be equipped with stan-
dard and/or optional extended lubrication lines enabling
lubrication of both fan bearings from one side of unit.
(See Figure 41) Class I fans will have permanently lu-
bricated bearings.
For best results, bearings should be relubricated while
in operation providing personal safety is assured. Add
grease slowly with shaft rotating until a slight bead forms
at the seals.
If necessary to relubricate while bearing is stationary,
refer to manufacturer’s data for maximum grease ca-
pacity for the size bearing.
Relubrication is generally accompanied by a temporary
rise in operating temperature. Excess grease will be
purged at seals.
Fan Bearing Lubricant –
A Lithium./Petroleum base
grease conforming to an NLGI grade two consistency
is normally used. Lubricant must be free of any chemi-
cal impurities 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-
perature range of -30°F to +200°F with intermittent highs
of +250°F. Lubricate bearings as required by the se-
verity of required duty.
Motor Lubrication and Bearings
Bearing grease will lose its lubricating ability over time,
not suddenly. The lubricating ability of a grease (over
time) 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 re-
sults can be obtained if the following recommendations
are used in your maintenance program.
Motor Bearing Lubricant –
A high grade ball or roller
bearing grease should be used. Recommended grease for
standard service conditions is Polyrex EM (Exxon Mobil).
Equivalent and compatible greases include: Texaco
Polystar, Rykon Premium #2, Pennzoil Pen 2 Lube and
Chevron SRI.
• Maximum operating temperature for standard
motors = 110°C.
• Shut-down temperature in case of a malfunction =
115°C.
Lubrication Intervals –
Recommended lubrication
intervals are shown in Table 9-1. It is important to realize
that the recommended intervals of Table 9-1 are based
on average use.
Refer to additional information con-
tained in Tables 9-2, 9-3 and 9-4.
FIG. 41 –
LUBRICATION LINES
26201A
4
