Model Number Nomenclature - Carrier Deluxe 38YZA Product Data

sound hood muffles noise from the
operation. The discharge muffler
minimizes low frequency
sound and pressure pulsation generated
by the compressor discharge gas.
Compressor — The 38YZA features
the efficient Copeland Scroll
compressor, specially designed for
applications using Puron refrigerant,
with its thicker shell, and an anti-reverse
rotation device for superior reliability
and quiet operation. In addition, each
compressor is mounted on rubber
isolators for additional sound reduction.
For improved serviceability, all models
are equipped with a compressor terminal
plug. The scroll compressor will start
under most system loads, thus
eliminating the need for start assisting
components. Continuous operation is
approved down to -30°F (-34.4°C) in the
heating mode and down to 55°F (12.8°C)
in the cooling mode. (See heating and
cooling performance tables.) The scroll
compressor is covered with a standard
10-year limited warranty.
Built-In Reliable Components —
The 38YZA's principal feature of
compressor protection is further
enabled by a high pressure switch; a
discharge temperature switch for
compressor overtemperature
protection; and a low pressure switch
for loss of charge protection. Reliable
operation is also optimized with a heavy
duty, quiet and easy to service reversing
valve.

Model number nomenclature

Electric Heat Pump
Nominal Capacity
018 — 18,000 Btu
024 — 24,000 Btu 042 — 42,000 Btu
030— 30,000 Btu 048 — 48,000 Btu
036— 36,000 Btu 060 — 60,000 Btu
2
Defrost Control Board — This board
incorporates a built-in 5-minute
compressor time-delay relay, defrost
relay, defrost timer, and low-voltage
terminal board. The defrost control
is a time/temperature initiation/
termination control which includes 4
field-selectable (DIP switch) time
periods of 30, 60, 90, and 120 minutes.
This control also includes a field-
selectable (DIP switch) Quiet Shift
defrost mode which, if selected,
maintains extremely quiet operation
during defrost.
Thermostatic Expansion Valve (TXV)
— This unit must be installed with a
Puron-refrigerant TXV on the indoor
coil. The FX4 and FV4 indoor fan coils
come factory equipped with a bi-flow
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
Puron-refrigerant TXV must be
installed. See accessory list in this
publication for correct part number.
WeatherArmor™ III System includes
three components:
— Casing steel is galvanized and coated
with a layer of zinc phosphate. A
modified polyester powder coating is
then applied and baked on, providing
each unit with a hard, smooth finish
that will last for many years.
—All screws on cabinet exterior are
ceramic coated for a long-lasting,
rust-resistant, quality appearance.
38YZA 024 3 1 1
Packaging
Series
Electrical
3—208/230-1
—The coil is protected with an
enhanced WeatherArmor™ heavy
duty inlet grille. With spacing
of 3/8-in. and construction of coated
12 gage wire, the guard helps protect
the coil from inclement weather,
vandalism, and incidental damage. It
provides protection while not
restricting airflow and maintaining
ease of coil inspection and cleaning.
Unit Design — All units are equipped
with totally enclosed fan motors for
greater reliability under rain and snow
conditions. The large, wraparound coil
uses copper tubing and enhanced sine
wave aluminum fins and is designed for
optimum heat transfer during heating
and cooling. The vertical air discharge
carries the sound and air up and away
from adjacent patio areas and foliage.
Rows of composite coils can be cleaned
with a common garden hose.
External Service Valves —Both service
valves are the brass, back seating type
with sweat connections. Each valve
has a service port for ease of checking
operating refrigerant pressures. A
separate suction service port provides for
ease of checking operating pressure in the
heating mode.
— 5-year limited
Limited Warranty
warranty on all parts, with a 10-year
limited warranty on the compressor.