The following greases can be used for standard applications at an operating ambient temperature
from -30ºC to 50ºC:
•
Chevron
®
SRI grease (Chevron Corporation)
•
UNIREX
®
N 2 grease (Exxon Mobil Corporation)
•
POLYREX
®
grease (Exxon Mobil Corporation)
•
Shell
®
Dolium R grease (Shell Oil Company)
For lubrication of TECO-Westinghouse motors:
•
Relubricate at 1000 operating hour intervals.
•
Refer to manufacturer for applicable greases.
•
Motors with shaft diameters less than 2 3/8 in. (60 mm) require 1 oz of grease per bearing,
while motors with shaft diameters between 2 3/8 in. (60 mm) and 3 in. (76 mm) require 1.5 oz
of grease per bearing.
WARNING
It is best practice not to mix different greases.
Note:
Additional information on motor lubrication and other service issues can be found in the
A-C Motors Instruction Manual.
Leak testing
Leak test the unit monthly. Repair any leaks found immediately.
Evaporator and condenser
The major portion of the maintenance of the condenser and evaporator involves maintaining the
water side of the condenser and evaporator in a clean condition.
The use of untreated water in cooling towers, closed water systems, for example, frequently results
in one or more of the following conditions:
1. Scale formation
2. Corrosion or rusting
3. Slime and algae formation
Providing correct water treatment ensures a longer and more economical life of the equipment.
Perform these tasks to determine the condition of the water side of the condenser and evaporator
tubes.
1. Clean the condenser tubes annually or earlier if conditions warrant. If the temperature
difference between the water off the condenser and the condenser liquid temperature
is more than 4°F (2.2°C) greater than the difference recorded on a new unit, it is a good
indication that the condenser tubes require cleaning. See
condenser tube cleaning instructions.
Model YK Style G R-134a or R-513A
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