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Installation
Exact speeds are difficult to obtain
with a motor driven system.
1. Start the compressor and bring it up to 25% speed
and then immediately stop the compressor.
2. After shutting down the compressor, allow the
compressor temperatures to stabilize for at least
15 minutes.
3. Repeat steps 1 and 2 at 50% speed, 75% speed,
and 100% speed.
4. Operate the compressor at 100% speed for one
minute while making the following checks:
During the initial operating period,
checks should be made on all me-
chanical parts of the system to be sure
they are functioning properly. They
must include, but are not limited to
the following checks:
A. Check for unusual or excessive vibration or
overheating.
B. In addition to compressor, check motor speed in-
creaser / turbine bearing temperatures carefully.
Compressors that utilize refrigerant
cooled oil coolers may not be oper-
ated if there is no source of coolant
available.
12
C. Check that the oil cooler(s) is functioning prop-
erly.
D. Check the compressor lubrication system (see
DAILY OPERATION).
E. The compressor discharge temperature must
not exceed the limits specified in the applica-
tion data sheet for the application or the safety
limits of the controls system.
Final Coupling Alignment Check
(Figure 4, Item 16)
This procedure is often referred to as
the "hot check".
1. After at least six hours of operation at design oper-
ating conditions, or after the system has stabilized
at it's design operating temperatures, make the com-
plete final coupling alignment check. Refer to the
Final Alignment Check as outlined in the coupling
instruction Form 160.71-N2.
2. Verify the results of the final coupling alignment
check before any effort is made to dowel any of
the components, or finalize the adjustments of the
base frame jackscrews.
FORM 220.11-NM2 (602)
YORK INTERNATIONAL
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