2
SCHEDULED MAINTENANCE
5F,H compressor and condensing units provide long life and de-
pendable service when properly operated and regularly main-
tained. Establish a maintenance schedule based on factors such as
operating hours, load conditions and water quality. Maintenance
schedules listed in this section are offered as guides. Modify them
as needed to satisfy individual machine requirements.
Check Lubrication System
Always check compressor oil level before starting unit. If oil is
required, record date and amount added. See Fig. 1 for location of
oil filter plug. Refer to Application guide 574-509 for specific oil
types and quantities of oil.
Use of accessory oil separator requires additional oil. Oil level and
separator float valve movement during initial compressor opera-
tion should agree with instructions furnished with the oil separator.
OIL FILTER MAINTENANCE
A bleed-type, high-pressure, disposable filter is available as an
accessory for 5H40-86 compressors (see Fig. 1). Replace oil filter
after the first 50 hours of operation, or whenever the oil is changed
or becomes dirty.
Check yearly for clogged filter, indicated by a greater than normal
difference between oil pressure ahead of filter and after filter
(before orifice elbow). When this difference exceeds 5 psig,
change filter as follows:
1. Close oil-line shutoff valves on each side of filter (see Fig. 1).
2. Disconnect oil lines at filter connections.
3. Loosen filter bracket; remove and replace filter body.
NOTE: Refer to Accessory Oil Filter Instructions for additional
information.
Fig. 1 — Oil Filter Accessory Package (5H40-5H86)
CHECK OIL AND SHAFT SEAL TEMPERATURE
The normal operating temperature of the oil in the crankcase
ranges from 100°F to 135°F when fully loaded. Do not permit
maximum oil temperature to exceed 150°F. Conditions under
which such excessive temperatures could occur include situations
where the compressor operates in a fully unloaded condition for
an extended period, because the compressor would not be able to
remove all of the heat generated by compression and friction. In
such situations, use an oil cooler to maintain safe operating tem-
peratures. Refer to 5F, H Application Data for more information.
When crankcase oil temperature falls within the 120°F to 135°F
range, the shaft seal housing temperature should be approximately
140°F to 150°F. Shaft seal housing temperatures above 170°F may
cause shaft seal to age rapidly, and harden and crack. Therefore:
WARNING
RISK OF PERSONAL INJURY
HOT and COLD surface temperatures can occur during opera-
tion and can result in severe burns of frostbite.
WARNING
RISK OF PERSONAL INJURY
Exposed moving parts of the compressor drive can cause se-
vere injury. Appropriate guards must be utilized. Guards must
be in place before operating.
WARNING
RISK OF PERSONAL INJURY
Only approved refrigerants and refrigeration oils may be used.
WARNING
RISK OF PERSONAL INJURY
Use nitrogen or inert gas for tightness/pressure testing. DO
NOT USE oxygen or other industrial gases.
WARNING
RISK OF PERSONAL INJURY
System strength/tightness test pressure should not exceed
440 psig on the high-side and 270 psig on the low-side. Close
shutoff valves to isolate compressor if necessary.
WARNING
RISK OF PERSONAL INJURY
Charge only with refrigerant that conforms to AHRI
Standard 700.
CAUTION
This compressor shipped without oil. Do not run without add-
ing required lubricant.
IMPORTANT: Install all safety decals/labels that come with the
compressor.
IMPORTANT: The full-flow oil filter, on 5H120 and 5H126
compressors only, contains a replaceable cartridge. Replace the
filter cartridge after the first 100 hours of compressor operation.
After the initial filter change, check yearly for filter clogging. If
the pressure difference across the filter exceeds 5 psig, pump
down the compressor and then remove the cartridge. Fig. 2
illustrates complete filter assembly parts (cartridge not shown in
Fig. 2).
OIL
FILTER
H
W~
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