Emerson Copeland Scroll YH16K1E, Инструкции по применению

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22 AGL_HP_ST_YHK1E_E_Rev02
5.6 Run-in time
Scroll compressors exhibit a slight decrease in input power during the initial running period.
Published performance ratings are based on calorimeter testing which is carried out after run-in.
Therefore, users should be aware that before the performance specified by EN 12900 is achieved
the compressor needs to be run in. Recommended run-in times for YH*K1E compressors to attain
the published performance are 16 hours at the standard conditions.
5.7 Initial start-up
CAUTION
High discharge pressure operation! Compressor damage!
Do not use
compressor to test opening setpoint of high-pressure cut-out. Bearings are
susceptible to damage before they have had several hours of normal running
in.
Liquid and high-pressure loads could be detrimental to new bearings. It is therefore important to
ensure that new compressors are not subjected to liquid abuse and high-pressure run tests. It is not
good practice to use the compressor to test the high-pressure switch function on the production line.
Switch function can be tested with nitrogen prior to installation and wiring can be checked by
disconnecting the high-pressure switch during the run test.
5.8 Rotation direction
Scroll compressors, like several other types of compressors, will only compress in one rotational
direction. Three-phase compressors will rotate in either direction depending upon phasing of the
power. Since there is a 50-50 chance of connecting power in such a way as to cause rotation in the
reverse direction,
it is important to include notices and instructions in appropriate locations
on the equipment to ensure proper rotation direction when the system is installed and
operated.
Observing that suction pressure drops and discharge pressure rises when the compressor is
energized allows verification of proper rotation direction. There is no negative impact on durability
caused by operating three-phase Scroll
compressors in the reversed direction for a short period of
time (under one hour) but oil may be lost. Oil loss can be prevented during reverse rotation if the
tubing is routed at least 15 cm above the compressor. After several minutes of operation in reverse,
the compressor protection system will trip due to high motor temperature. The operator will notice a
lack of cooling or heating. However, if allowed to repeatedly restart and run in reverse without
correcting the situation, the compressor will be permanently damaged.
All three-phase scroll compressors are identically wired internally. Therefore, once the correct
phasing is determined for a specific system or installation, connecting properly phased power leads
to the identified compressor terminals will ensure proper rotation direction.
5.9 Starting sound
During the very brief start-up, a clicking sound resulting from the initial contacting of the spirals is
audible and is normal. Due to the design of the Copeland Scroll compressors, the internal
compression components always start unloaded even if system pressures are not balanced. In
addition, since internal compressor pressures are always balanced at start-up, low-voltage starting
characteristics are excellent for Copeland Scroll compressors.
5.10 Deep vacuum operation
CAUTION
Vacuum operation! Compressor damage!
Copeland Scroll compressors
should never be used to evacuate refrigeration or air-conditioning systems.
Operating scroll compressors in deep vacuum could damage internal motor
parts and lead to unacceptable high temperatures in the compressor housing.
5.11 Shell temperature
During normal operation, the discharge gas as well as the compressor top shell and discharge line
can reach temperatures up to 130 °C
– see
Chapter 3.6 "Discharge gas temperature protection" .