22-1750-05
11
Mechanical
Specification Options
General
The 2TWX4 shall be fully charged from
the factory for matched indoor section
and up to 15 feet of piping. This unit must
be designed to operate at outdoor
ambient temperatures as high as 115°F.
Cooling capacities shall be matched with
a wide selection of air handlers and
furnace coils that are ARI certified. The
unit is certified to UL 1995. Exterior must
be designed for outdoor application.
Casing
Unit casing is constructed of heavy
gauge, galvanized steel and painted with
a weather-resistant powder paint.
Corrosion and weatherproof CMBP-G30
DuraTuff™ base.
Refrigerant Controls
Refrigeration system controls include
condenser fan and compressor
contactor. High and low pressure controls
are inherent to the compressor. Another
standard feature is the liquid line dryer.
Compressor
The Climatuff
®
compressor features
internal over temperature and pressure
protector, total dipped hermetic motor
and thermostatically controlled sump
heater. Other features include: roto lock
suction and discharge refrigeration
connections, centrifugal oil pump, and
low vibration and noise.
Condenser Coil
The Spine Fin™ coil shall be continu-
ously wrapped, corrosion resistant all
aluminum with minimum brazed joints.
This
coil is 3/8 inch O.D. seamless aluminum
glued to a continuous aluminum fin. Coils
are lab tested to withstand 2,000 pounds
of pressure per square inch. The outdoor
coil provides low airflow resistance and
efficient heat transfer. The coil is pro-
tected on all four sides by louvered
panels.
Low Ambient Cooling
As manufactured, this unit has a cooling
capability to 55°F. The addition of an
evaporator defrost control permits
operation to 40°F. The addition of an
evaporator defrost control with TXV
permits low ambient cooling to 30°F.
Accessories
Thermostats —
Heating/Cooling
(manual and automatic changeover).
Sub-base to match thermostat and
locking thermostat cover.
Evaporator Defrost Control —
See
Low Ambient Cooling.
Outdoor Thermostat —
Supplemental
heat outdoor ambient lockout from
46 to –10°F.