Lennox XC17-024, Руководство пользователя

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XC17 - 2 to 5 Ton Air Conditioner / Page 3
REFRIGERATION SYSTEM (CONTINUED)
Copper Tube/Enhanced Fin Coil
Lennox designed and fabricated coil.
Ripple-edged aluminum fins.
Copper tube construction.
Lanced fins provide maximum exposure of fin surface to
air stream resulting in excellent heat transfer.
Fin collars grip tubing for maximum contact area.
Flared shoulder tubing connections/silver soldering
construction.
Coil is factory tested under high pressure to insure
leakproof construction.
Entire coil is accessible for cleaning.
High Pressure Switch
Shuts off unit if abnormal operating conditions cause the
discharge pressure to rise above setting.
Protects compressor from excessive condensing
pressure.
Manual reset.
Low Pressure Switch
Shuts off unit if suction pressure falls below setting.
Provides loss of charge and freeze-up protection.
Automatic reset.
Hi-Capacity Liquid Line Drier
Factory installed in the liquid line, the drier traps
moisture or dirt that could contaminate the refrigerant
system.
100% molecular-sieve bead type drier.
OPTIONS
Expansion Valve Kits
Must be ordered extra and field installed on certain
evaporator units. See TXV Usage table.
Chatleff style fitting.
Freezestat
Installs on or near the discharge line of the evaporator
or on the suction line.
Senses suction line temperature and cycles the
compressor off when suction line temperature falls
below it’s setpoint.
Opens at 29°F and closes at 58°F.
Refrigerant Line Kits
Refrigerant lines (suction & liquid) are shipped
refrigeration clean. Lines are cleaned, dried,
pressurized, and sealed at factory.
Suction line fully insulated.
L15 lines are stubbed at both ends.
See Specifications table for selection.
Not available for -060 model and must be field
fabricated.
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COMPRESSOR
Scroll Compressor
Compressor features
high efficiency with
uniform suction flow,
constant discharge flow
and high volumetric
efficiency and quiet
operation.
Compressor consists
of two involute spiral
scrolls matched together
to generate a series of
crescent shaped gas
pockets between them.
During compression, one
scroll remains stationary
while the other scroll
orbits around it.
Gas is drawn into the
outer pocket, the pocket is sealed as the scroll rotates.
As the spiral movement continues, gas pockets are
pushed to the center of the scrolls. Volume between the
pockets is simultaneously reduced.
When pocket reaches the center, gas is now at high
pressure and is forced out of a port located in the center
of the fixed scrolls.
During compression, several pockets are compressed
simultaneously resulting in a smooth continuous
compression cycle.
Continuous flank contact, maintained by centrifugal
force, minimizes gas leakage and maximizes efficiency.
Scroll compressor is tolerant to the effects of slugging
and contaminants. If this occurs, scrolls separate,
allowing liquid or contaminants to to be worked toward
the center and discharged.
Low gas pulses during compression reduces
operational sound levels.
Compressor motor is internally protected from
excessive current and temperature.
Compressor is installed in the unit on resilient rubber
mounts for vibration free operation.
Factory installed crankcase heater.
Crankcase Heater
Crankcase heater prevents migration of liquid
refrigerant into compressor and ensures proper
compressor lubrication.
Compressor Sound Cover
A Lennox-exclusive, sand-filled, polypropylene
copolymer, compressor cover dramatically reduces
compressor sound levels.
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FEATURES