Model Number Nomenclature - Carrier 38TDB Product Data

rust-resistant, quality appearance.
The coil is protected by an enhanced
WeatherArmor™ heavy duty inlet grille.
Constructed of a coated steel wire grid
and with spacing of 3/8 in., the guard
helps to protect the coil from inclement
weather, vandalism and incidental
damage. It provides protection while
not restricting airflow and maintain-
ing ease of coil inspection and
cleaning.
Unit Design — The coil incorporates
copper tubing and enhanced, aluminum
fins for optimum heat transfer. Hot con-
denser air and sound are discharged ver-
tically and away from adjacent patio
areas and foliage. Polymer spacers raise
the coil in a heat pump style basepan for
easy removal of water, dirt, and debris.
An electronic ECM condenser fan
(037 only) motor provides multi-speed
operation and enhanced low-speed effi-
ciencies and sound levels.
Auto-reset high- and low-pressure
switches continuously monitor system
operation.
A compressor crankcase heater, ener-
gized during the compressor off cycle,
helps to provide reliable starting.
Application Versatility — This unit
can be combined with a wide variety of
evaporator coils and fan coils to provide
quiet, dependable comfort. Unit can be
installed on a roof or at ground level on a
slab.
External Service Valves — Both
service valves are brass, back seating type

Model number nomenclature

18 SEER
2-Speed Air Conditioner
Nominal Capacity
024 — 24,000 Btuh
036 — 36,000 Btuh
037 — 37,000 Btuh
048 — 48,000 Btuh
060 — 60,000 Btuh
CERTIFICATION APPLIES
ONLY WHEN THE
COMPLETE SYSTEM
IS LISTED WITH ARI.
*Refer to the combination ratings in the Product Data Digest for system combinations meeting ENERGY STAR® efficiency standards.
2
with sweat connections. Valves are exter-
nally located so refrigerant connections
can be made quickly and easily. Each
valve has a service port for ease of check-
ing operating refrigerant pressures.
Easy Serviceability — Removal of
access panel and control box cover
provides easy access to all electrical con-
trols and compressor. Removal of top
provides access to fan motor and coil.
A self-diagnostic indicator on the
electronic control board informs the ser-
vice technician of the failed component.
Compressor Protection — The com-
pressor is protected with internal over-
loads. An internal pressure relief valve
provides high-pressure protection to the
refrigerant system.
Standard Features — An electronic
control eliminates excessive wiring. A
compressor sound hood and discharge
muffler provide improved sound levels
as well as sound quality.
Important — When selecting an
indoor blower section to be installed
with the two-speed unit, variable speed
indoor blower technology is recom-
mended. Some 5-speed tap PSC motor
products can be applied but detailed
engineering of the total system static
pressure is required. Very few 4-speed
tap PSC indoor motor products can be
installed with the two-speed unit. It is
important to match CFM for high-speed
capacity and low-speed capacity as
stated in the combination rating tables.
To derive all the benefits of improved
38TDB 036
*
As an ENERGY STAR ® Partner, Carrier
Corporation has determined that this
product meets the ENERGY STAR
®
guidelines for energy efficiency.
room humidity and temperature control,
lower noise levels, and maximum
energy savings, it is recommended that
you use variable speed indoor blower
technologies. See product data digest for
CFM requirements for low-speed capac-
ity and high-speed capacity operation.
required CFM for low-speed capacity
operation, you may have little latent heat
removal, resulting in lower comfort lev-
els in high humidity climates. If your
climate is hot with little to no humidity,
this mode of operation may be desired.
tor and relay.
be installed with a Puron-refrigerant
TXV on the indoor coil. The FV4 indoor
fan coils and the CK5P indoor furnace
coils come factory equipped with a bi-
flow balance port Puron-refrigerant
TXV. When installed in this application,
no further change is required. If any
other indoor fan coil or furnace coil is
used, an accessory bi-flow, balance port
TXV must be installed. See accessory
list in this publication for correct part
number. A Puron refrigerant, hard shut
off, balance port TXV is shipped only
with the 037 size for field installation.
limited warranty on all parts and a ten-
year limited warranty on the compressor
parts. Refer to warranty certificate for
specific details.
3 0 1
Packaging
Series
Electrical
3 — 208/230-1
REGISTERED QUALITY SYSTEM
If your CFM is higher than the
Compressor Start Assist — Capaci-
Expansion Valve — This unit must
Limited Warranty — Five-year