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PRODUCT DATA | 9
Product Data
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MECHANICAL SPECIFICATIONS
Frequency ranges for the 18,000 ~ 48,000 Btu/h outdoor
units are:
18k, 24k Btu/h = 10 to 95 Hz Cooling; 10 to 130 Hz Heating
36k Btu/h = 15 to 120 Hz Cooling; 15 to 135 Hz Heating
42k, 48K Btu/h = 10 to 120 Hz Cooling; 10 to 135 Hz Heating
Coil
Outdoor Unit
Heat pump outdoor unit coils are made of nonferrous louvered
aluminum fins protected with an integral coil guard. The coil for each
outdoor unit has a minimum of 14 fins per inch (FPI); heat exchanger
has two rows. The coil fins have a factory applied corrosion resistant
GoldFin™ material with hydrophilic coating tested in accordance with
ASTM B-117 salt spray test procedure for a minimum of 1,000 hours.
Coils are factory tested to a pressure of 551 psig.
Indoor Unit
Indoor unit coils are factory built and are comprised of aluminum
fins mechanically bonded to copper tubing. Each indoor unit has
a minimum of two rows of coils, which are pressure tested to 551
psig at the factory. Each unit is provided with a factory installed
condensate drain pan below the coil.
Fans and Motors
Outdoor Unit
The 18,000 Btu/h (LUU180HHV),and 24,000 Btu/h (LUU240HHV)
outdoor units include one direct drive, variable speed axial /
propeller type fan with a horizontal air discharge; the 36,000 Btu/h
(LUU360HHV), 42,000 Btu/h (LUU420HHV), and 48,000 Btu/h
(LUU480HHV) include two fans. Fan blades are made of Acrylonitrile
Butadiene Styrene (ABS) material, and have a Brushless Digitally
Controlled (BLDC) fan motor. The fan motor has inherent protection,
permanently lubricated bearings, and variable speed with a
maximum speed up to 750 rpm (cooling) and 800 rpm (heating).
Raised guards are provided to limit contact with moving parts.
Indoor Unit
All of the indoor units have a single, direct-drive, turbo fan
manufactured of high-strength ABS HT-700 polymeric resin; the fans
are statically and dynamically balanced. The fan motor is brushless
digitally controlled (BLDC) with permanently lubricated and sealed
ball bearings. The fan / motor assembly is mounted on vibration-
attenuating rubber grommets. Fan speed is controlled using a
microprocessor-based direct digital control algorithm that provides
pre-programmed, field-selectable fixed or auto fan speeds in the
Heating and Cooling modes.
The indoor fan has Low, Med, High, Power Cool, and Auto settings
for Cooling mode; and has Low, Med, High, Power Heat, and Auto
settings for Heating mode. Auto setting adjusts the fan speed
based on the difference between the controller set-point and space
temperature.
Air Filter - Indoor
Unit
Return air is filtered with a
factory-supplied, removable,
washable filter accessible from
the bottom of the unit. For 2’
x 2’ cassettes the removable
washable filter size is 14” x 14”
x 1.”
For 3’ x 3’ cassettes the
removable washable filter size is
20.5” x 20.5” x 1.”
Electrical
The system was designed to
operate using 208–230/60/1
power with voltage variances of
±10% and includes overcurrent
protection. The indoor unit is
powered through the outdoor
unit.
Controls
Indoor and outdoor units are
factory wired with necessary
electrical control components,
printed circuit boards, thermistors, sensors, terminal blocks, and
lugs for power wiring. Factory installed microprocessor controls in
the outdoor unit and indoor unit shall perform functions to efficiently
operate the single zone system, communicating via a 14 AWG four-
conductor, stranded, shielded or unshielded (if shielded, must be
grounded to the chassis at the outdoor unit only) power/transmission
cable (and must comply with applicable local and national codes.
Microprocessor-based algorithms provide component protection,
soft-start capability, refrigeration system pressure, temperature,
defrost, and ambient control. System can be operated through
a handheld wireless controller supplied with the four-way ceiling
cassette indoor unit.
Condensate Lift / Pump
The indoor unit is provided with a factory installed and wired
condensate lift/pump capable of providing a maximum 31-1/2 inch
(18k, 24k, 36k, 42k, 48k indoor units) lift from the bottom surface of
the unit. Drain pump has a safety switch to shut off the indoor unit if
the condensate rises too high in the drain pan.
Figure 4: Four-Way 36,000 to
48,000 Btu/h 3x3 Ceiling Cassette
System (LC369HHV, LC429HHV,
and LC489HHV Models).
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