FORM 160.73-O2 (605)
35
YORK INTERNATIONAL
• Add 1.5 cubic inches of
Texaco Premium RB grease
every 1800 hours of operation of the motor. Do not
expect to see grease exiting the grease relief port dur-
ing these re-lubrications.
Westinghouse Motor Lubrication:
•
Re-greasing should occur at 1000 operating hour
intervals.
• Westinghouse recommends using Westinghouse
Grease No. 53701.
•
Motors with shaft diameters less than 2 3/8 inch
require 1 oz of grease per bearing while motors with
shaft diameters between 2 3/8 and 3 inches require
1.5 oz.
Recommended greases for standard applications:
OPERATING AMBIENT TEMP. -30ºC to 50ºC
Chevron SRI
(Chevron)
Exxon Unirex #2
(Exxon Corp.)
Exxon Polyrex
(Exxon Corp.)
Shell Dolum R
(Shell Oil Co.)
Mixing different greases is not
recommended
Additional information on motor lubri-
cation and other service issues can be
found in the A-C Motors Instruction
Manual.
LEAK TESTING
The unit should be leak tested quarterly. Any leaks found
must be repaired immediately.
EVAPORATOR AND CONDENSER
The major portion of maintenance on the condenser and
evaporator will deal with the maintaining the water side
of the condenser and evaporator in a clean condition.
The use of untreated water in cooling towers, closed
water systems, etc. frequently results in one or more of
the following:
1. Scale
Formation.
2. Corrosion
or
Rusting.
3. Slime and Algae Formation.
It is therefore to the benefi t of the user to provide for
proper water treatment to provide for a longer and
more economical life of the equipment. The following
rec om men da tion should be followed in determining
the con di tion of the water side of the condenser and
evaporator tubes.
1. The condenser tubes should be cleaned annually
or earlier if conditions warrant. If the tem per a ture
dif fer ence between the water off the condenser and
the condenser liquid temperature is more than 4°F
(2°C) great er than the difference recorded on a
new unit, it is a good indication that the condenser
tubes re quire clean ing. Refer to the Maintenance
section of this manual for condenser tube cleaning
instructions.
2. The evaporator tubes under normal cir cum stanc es
will not require cleaning. If however the tem per a ture
dif fer ence between the refrigerant and the chilled
wa ter increases slowly over the operating sea son,
it is an indication that the evaporator tubes may be
foul ing or that there may be a water bypass in the
water box requiring gasket replacement or refrigerant
may have leaked from the chiller.
OIL RETURN SYSTEM
1. Change the dehydrator in the oil return system semi-
an nu al ly or earlier if the oil return system fails to
operate.
2. When the dehydrator is changed, the nozzle of the
eductor should be checked for any foreign particles
that may be obstructing the jet.
ELECTRICAL CONTROLS
1. All electrical controls should be in spect ed for ob-
vi ous malfunctions.
2. It is important that the factory settings of controls
(operation and safety) not be changed. If the set tings
are changed without YORK’s approval, the warranty
will be jeopardized.
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