Trane IntelliPak 2 Series, Инструкция по установке, эксплуатации и обслуживанию

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RT-SVX24Q-EN 173
5. Press the TEST START key to start the test.
Remember that the delay designated in step 4 must
elapse before the system will begin to operate.
6. After all of the compressors and condenser fans for
the number 1 circuit have been operating for
approximately 30 minutes, observe the operating
pressures. Use the appropriate pressure curve
found in
“(60 Hz) Air-Cooled Condensers,” p. 128 or
“(50 Hz) Air-Cooled Condensers,” p. 142 to
determine the proper operating pressures. For
superheat and subcooling guidelines, refer to
“Thermostatic Expansion Valves,” p. 177 .
IIm mp po orrtta an ntt:: Do Not release refrigerant to the
atmosphere! If adding or removing
refrigerant is required, the service
technician must comply with all
Federal, State and local laws.
7. Verify that the oil level in each compressor is
correct. The oil level may be down to the bottom of
the sightglass but should never be above the
sightglass.
8. Press the STOP key at the Human Interface Module
in the unit control panel to stop the system
operation.
9. Repeat steps 1 through 8 for the number 2
refrigeration circuit.
10. After shutting the system off, check the compressor
oil appearance. Discoloration of the oil indicates
that an abnormal condition has occurred. If the oil is
dark and smells burnt, it has overheated because:
the compressor is operating at extremely high
condensing temperatures; high superheat; a
compressor mechanical failure; or, occurrence of a
motor burnout.
If the oil is black and contains metal flakes, a
mechanical failure has occurred. This symptom is
often accompanied by a high compressor
amperage draw.
If a motor burnout is suspected, use an acid test kit
to check the condition of the oil. Test results will
indicate an acid level exceeding 0.05 mg KOH/g if a
burnout occurred.
The scroll compressor uses Trane OIL00079 (one
quart container) or OIL00080 (one gallon container)
without substitution. The appropriate oil charge for
CSHN250 and CSHN315 scroll compressors is 14.2
pints. For CSHN374 scroll compressor, use 15.2
pints.
Compressor Crankcase Heaters
Each scroll compressor is equipped with a 160-watt
crankcase heater.
Compressor Operational Sounds
Because of the scroll compressor design, it emits a
higher frequency tone (sound) than a reciprocating
compressor. It is designed to accommodate liquids,
both oil and refrigerant, without causing compressor
damage. The following sections describe some of the
operational sounds that differentiate it from those
typically associated with a reciprocating compressor.
These sounds do not affect the operation or reliability
of the compressor.
At Shutdown
When a Scroll compressor shuts down, the gas within
the scroll expands and causes momentary reverse
rotation until the discharge check valve closes. This
results in a “flutter” type sound.
At Low Ambient Start-Up
When the compressor starts up under low ambient
conditions, the initial flow rate of the compressor is low
due to the low condensing pressure. This causes a low
differential across the thermal expansion valve that
limits its capacity. Under these conditions, it is not
unusual to hear the compressor rattle until the suction
pressure climbs and the flow rate increases.
N No otte e:: Evaporative Condensers ordered with sump
heaters will have low ambient down to 10 deg as
standard
Variable Speed Compressors
At all operating speeds, eFlex™ permanent magnet
variable speed compressors sound different than fixed
speed scrolls. At low speed, variable speed
compressors can sputter. At high speed, variable speed
compressor buzz. These are normal operating sounds.
To ensure a quiet installation, eFlex variable speed
compressors are installed in a sound enclosure. Make
sure and keep the sound enclosure installed at all times
other than servicing.
Listen to recordings of eFlex variable speed scroll
sounds at www.trane.com/eFlexSounds.
IIm mp po orrtta an ntt:: Variable speed scroll compressors sound
different than single speed scroll
compressors. Sound changes with speed
and condition. To assist troubleshooting,
listen to normal operating sounds of
variable speed scroll compressors at www.
trane.com/eFlexSounds
Electronic Compressor
Protection Module (CPM)
The CSHN*** compressors come equipped with a
compressor protection device (CPM) capable of
detecting phase reversal, phase loss, and motor
overheating. When a fault is identified, the output relay
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