22-1790-08
11
Mechanical
Specification Options
General
The 4TTR3 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 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 alumi-
num 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 protected 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 30°F. The addition of a low
ambient kit with TXV permits low ambient
cooling to 0°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.