Lennox XC16 Specification page 3

FEATURES
REFRIGERATION SYSTEM (CONTINUED)
D
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.
E
Low Pressure Switch
Shuts off unit if suction pressure falls below setting.
Provides loss of charge and freeze-up protection.
Automatic reset.
F
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
indoor units. See Specification table and TXV
Substitution table.
Chatleff style fitting.
Freezestat
Installs on or near the discharge line of the indoor coil 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.
COMPRESSOR
G
Copeland Scroll Ultra Tech™ Two-Stage 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 be worked toward the
center and discharged.
at 67% capacity, creating more cost-effective and
efficient compressor operation. The bypassed
refrigerant is returned to the compressor housing
through the bypass ports. When the thermostat calls for
second-stage cooling, the internal solenoid is energized,
the slider ring rotates and covers the bypass ports, and
the compressor operates at full capacity.
Low gas pulses during compression reduces
operational sound levels.
On the fixed scroll there
are two bypass ports in
the first suction pocket. On
the outside of the fixed
scroll there is a "slider
ring" that is controlled by
an internal solenoid that
will rotate and cover the
bypass ports. When the
thermostat calls for
first-stage cooling, the
bypass ports are open and
the compressor operates
XC16 - 2 to 5 Ton Heat Pump / Page 3