2
Model number nomenclature
38YKB
018
3
0
1
Electric Heat Pump
Packaging
Series
Nominal Capacity
018—18,000 Btu
042—42,000 Btu
024—24,000 Btu
048—48,000 Btu
030—30,000 Btu
060—60,000 Btu
036—36,000 Btu
Electrical
3—208/230-1
charge; failure of evaporator fan;
built-in compressor internal pressure
equalization (018, 048, 060 sizes) to
limit excessive pressure build-up; a
high-pressure switch for high-
pressure protection on units equipped
with scroll compressors; and defrost
board for time/temperature defrost
function and compressor time delay
(5 minute).
Defrost Control Board
—
Incorporates a built-in 5-minute
compressor time delay, a defrost
relay, defrost timer, and low-voltage
wire leads. The defrost control is a
time/temperature initiation/
termination control which includes 3
field-selectable time periods of 30,
50, and 90 minutes.
Weather-Protective Cabinet
—
Steel is protected with a heavy
coating commonly called
‘‘galvanizing,’’ and coated with a
layer of zinc phosphate. A coat of
modified polyester powder 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 coated
for a long-lasting rust-resistant,
quality appearance.
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 tube
and enhanced sine wave aluminum
fin 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. Coil
can be cleaned with a common
garden hose.
External Service Valves
— Both
service valves are brass, front seating
type with sweat connections. Each
valve has a service port for ease of
checking operating refrigerant
pressures. Valves are externally
located so refrigerant tube
connections can be made quickly and
easily. A third service port is located
on the service panel for ease of
checking operating suction pressure
in the heating mode.
Warranty
— Standard 1-year on all
parts, with an additional 4-years on
compressor.
