Features And Benefits; Refrigeration System - Lennox T-CLASS TS Series Engineering Data

FEATURES AND BENEFITS

Applications
Air conditioners are available in 6, 7.5, 10 ton (one
compressor) and 10, 12.5, 15 and 20 ton (two
compressors) nominal sizes.
Matching air handlers provide a wide range of cooling
capacities and applications. See ARI Ratings tables.
See Air Handlers sections for data.
Units shipped completely factory assembled, piped, and
wired. Each unit is test operated at the factory insuring
proper operation.
Installer must set air conditioner, connect refrigerant lines,
add refrigerant charge and make electrical connections to
complete job.

REFRIGERATION SYSTEM

Refrigerant
Units operate with chlorine−free, ozone
friendly, R−410A (field furnished).
B
Outdoor Coil Fan(s)
TSA072 and TSA090 units have one outdoor fan. TSA120
and TSA150 units have two outdoor fans. TSA180 and
TSA240 units have four outdoor fans.
Direct drive fan(s) moves large volumes of air uniformly
through entire condenser coil(s) for high refrigerant
cooling capacity.
Upward discharge of air reduces operating sound levels
and prevents damage to lawns, shrubs, and walkways.
Fan motors are totally enclosed, overload protected and
equipped with a rain shield.
Fan service access is accomplished by removal of fan
guard(s) or removal of access panel.
C
Copper Tube/Enhanced Fin Coil(s)
Units are equipped with a wrap−around U" shaped coil
(072−090−120 models) or two
(150−180−240 models).
Lennox designed and fabricated coils constructed of
precisely spaced ripple-edge aluminum fins machine
fitted to seamless copper tubes.
Lanced fins provide maximum exposure of fin surface to
air stream resulting in excellent heat transfer.
Fins equipped with collars that grip tubing for maximum
contact area.
Flared shoulder tubing connections and machine brazed
silver soldering provide tight, leakproof joints.
Long life copper tubing is corrosion-resistant and easy to
field service.
Thoroughly factory tested under high pressure to ensure
leakproof construction.
Completely accessible for cleaning.
D
High Pressure Switch
Shuts off unit if abnormal operating conditions cause
discharge pressure to rise above setting.
Protects the compressor from excessive condensing
pressure.
Manual reset.
E
Loss of Charge Switch
Shuts off unit if liquid line pressure falls below setting.
Provides loss of charge and freeze-up protection.
Automatic reset.
F
Hi-Capacity Drier(s)
Drier traps moisture or dirt that could contaminate the
refrigerant system.
G
Refrigerant Lines and Service Valves
Suction and liquid lines are located on corner of unit
cabinet and are made with sweat connections. See
dimension drawings.
Fully serviceable suction and liquid line service valves
provide complete service access to refrigerant system.
Suction valve can be fully shut off, while liquid valve can be
front seated to manage refrigerant charge while servicing
system. Accessible outside of unit cabinet.
H
Compressors
TSA072, TSA090 and TSA120S4S models feature a
single scroll compressor. TSA120S4D, TSA150, TSA180
and TSA240 models have two scroll compressors.
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 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.
L" shaped coils
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.
Crankcase Heater(s) (All Models)
Crankcase heater(s) prevents migration of liquid
refrigerant into compressor(s) and ensures proper
compressor lubrication.
TS 6 to 20 Ton R−410A Air Conditioners / Page 3