Table Of Contents - Carrier 50TFF007-014 Product Data

All units feature a non-corrosive
sloped condensate drain pan in accor-
dance with ASHRAE (American Soci-
ety of Heating, Refrigeration and Air
Conditioning Engineers) Standard 62.
Also, the sloped condensate pan on
units permits either an external side
condensate drain (outside the roof curb)
or an internal bottom drain (inside the
roof curb). Both options require field-
supplied P-trap.
In addition, the 50TFF units have a
standard filter access door, which per-
mits tool-less filter changes.
Field-installed electric heaters are
available in a wide range of capacities.
Single point wiring kit makes installa-
tion simple.
Simple electrical connections
Terminal boards, located in the base
unit control box, facilitate connections
to room thermostat, outdoor thermo-
stat(s), economizer, and electric heat.
Service panels are quickly removed,
permitting easy servicing.
Thru-the-bottom service connection
capability and thru-the-curb service
connections accessory allows power
and control wiring to be routed through
the unit basepan or curb, minimizing
roof penetrations. Both power and
control connections are made on the
same side of the unit to simplify instal-
lation. In addition, color-coded wires
permit easy tracing and diagnostics.
Proven compressor reliability
Design techniques feature computer-
programmed balance between com-
pressor, condenser, and evaporator.
Carrier-specified hermetic compres-
sors are equipped with compressor
overcurrent and overtemperature pro-
tection to ensure dependability.
The 50TFF units have Carrier's ex-
clusive Acutrol™ metering device which
precisely controls refrigerant flow,
preventing slugging and flood-back,
while maintaining optimum unit
performance.
Carrier's exclusive Acutrol metering
device precisely controls refrigerant
flow, preventing slugging and flood-
back, while maintaining optimum unit
performance.
Durable, dependable
construction
Designed for durability in any climate,
the weather-resistant cabinets are
manufactured using pre-painted steel.
The cabinet is constructed of galva-
nized steel and bonderized, and all exte-
rior panels are coated with a prepaint-
ed baked enamel finish. The paint
2
finish is non-chalking, and is capable of
withstanding Federal (U.S.A.) Test
Method Standard ASTM B117
500-hour salt spray test. All internal
cabinet panels are primed, permitting
longer life and a more attractive ap-
pearance for the entire unit. In addi-
tion, the 50TFF units are designed with
a single, continuous top piece to elimi-
nate any possible leaks. Totally en-
closed condenser-fan motors and per-
manently lubricated bearings provide
additional unit dependability.
Integrated economizers and
outdoor air
During a first stage call for cooling, if
the outdoor-air temperature is below
the control set point, the supply-air
sensor modulates the economizer out-
door-air damper open to achieve the
set point. When second-stage cooling is
called for, the compressor is energized
in addition to the economizer. If the
outdoor-air temperature is above the
set point, the first stage of compression
is activated and the economizer stays at
minimum vent position. Economizer
operation is controlled by Accusensor™
I dry-bulb thermostat that senses
outdoor-air temperature. Accessory up-
grade kits include solid-state enthalpy
control and differential enthalpy sensor.
The Durablade economizer has a re-
liable sliding plate damper which is eas-
ily adjusted for 100% outdoor air,
100% return air, or any proportions of
mixed air.
The 50TFF units also utilize the op-
tional field or factory-installed
EconoMi$er. This newly designed
EconoMi$er incorporates a
parallel-opposed blade design. In
addition, the EconoMi$er has a spring
return built into the damper motor to
provide reliable close-on-power-loss.
The EconoMi$er comes equipped with

Table of contents

Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,5
Options and Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,10
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11,12
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13,14
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-33
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Typical Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36,37
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-40
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42-44
up to 100% barometric relief capability
for high outdoor airflow applications.
In addition, the EconoMi$er baro-
metric relief damper or integrated pow-
er exhaust accessory can be utilized to
help maintain proper building pressure.
Quiet, efficient operation and
dependable performance
Compressors have vibration isolators
for extremely quiet operation. Efficient
fan and motor design permits opera-
tion at very low sound levels, and all
008-014 units are mounted on a spe-
cial polycore plate.
The 50TFF008-014 units offer high
energy efficiency and lower utility costs
through part load operation using
2 stages of cooling.
Quiet and efficient operation is
provided by belt-driven evaporator fans
(standard). The belt-driven evaporator-
fan motor allows adjustment to avail-
able static pressure to meet the job re-
quirements of even the most demand-
ing applications.
Increased operating efficiency is
achieved through computer-designed
coils featuring staggered copper tubes.
Fins are ripple-edged for strength,
lanced, and double waved for higher
heat transfer.
Carrier Apollo controls add
reliability, efficiency, and
simplification
The direct digital controls are ordered
as a factory-installed option. Designed
and manufactured exclusively by
Carrier, the controls can be used to ac-
tively monitor and control all modes of
operation, as well as to monitor
evaporator-fan status, filter status
indoor-air quality (humidity and carbon
dioxide), supply-air temperature, and
outdoor-air temperature.
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