Mechanical Specification Options - Trane WCC030 Product Data

Mechanical
Specification Options
General
The units shall be horizontal airflow as
shipped and convertible to downflow. All units
shall be factory assembled, piped, internally
wired and fully charged with R-22. Units shall
be UL listed and carry a UL label. All units
shall be factory run tested to check cooling
operation, fan and blower rotation and control
sequence. Units shall be designed to operate
at ambient temperatures between 115°F and
55°F in cooling as manufactured. Cooling
performance shall be rated in accordance
with ARI standards.
Unit Casing
All components shall be mounted in a
weather-resistant steel cabinet with an
enamel finish. Access panels shall be
provided for unit controls and indoor coil and
fans. Indoor air section compartment shall be
completely insulated with fireproof, perma-
nent, odorless glass fiber material. Knockouts
shall be provided for utility and control
connections. Drain connections shall be
provided to accommodate indoor water runoff.
Compressor
The compressor shall be a hermetically
®
sealed, high efficiency Climatuff
Internal overcurrent and over temperature
protection, internal pressure relief shall be
standard. Crankcase heaters shall be
standard on all three phase models.
Refrigeration System
All units shall have capillary tube refrigerant
control. Service pressure tap ports, and a
refrigerant line filter dryer shall be standard.
Indoor and Outdoor Coils
Coils shall be internally finned or smooth bore
3/8" copper tubes mechanically bonded to
configured aluminum plate fin as standard.
Evaporator coil leak and pressure tested to
200 psig; condenser coil tested to 450 psig.
Indoor Fan
The indoor fan shall be a forward curved,
centrifugal-type fan with a multiple-speed,
direct drive motor. Motor is permanently
lubricated and shall have built-in overload
protection.
Outdoor Fan
One, direct-drive, statically and dynamically
balanced propeller fan shall be used in a
draw-through vertical discharge configuration.
Permanently lubricated weather proof motor
shall have built-in thermal overload protection.
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System Controls
System controls include condenser fan,
evaporator fan and compressor contactors.
Accessories
Roof Curb — The roof curb shall be designed
to mate with the unit and provide support and
complete weathertight installation when
properly installed. Adhesive back polyure-
thane sealing strips shall be provided to
ensure an airtight seal between supply and
return openings of the curb and unit. The roof
curb design allows field fabricated ductwork to
be connected directly to the curb. Curb ships
knocked down for field assembly, and includes
factory-installed wood nailer strips.
Fully Modulating Economizer — This
accessory shall be field installed and be
composed of the following items: 0-100%
fresh air damper, damper drive motor, fixed
dry bulb enthalpy control, and low voltage
pigtails for electrical connections. Solid state
enthalpy or differential enthalpy control is
optional. Economizer operations shall be
controlled by the preset position of the
enthalpy control. A barometric relief damper
shall be standard with the economizer and
compressor. provide a pressure operated damper that shall
be gravity closing and prohibit entrance of
outside air on equipment "off" cycle.
Manual Outside Air Dampers — Rain hood
and screen shall be field installed. Suitable for
up to 25% outside air.
Anti-Short Cycle Timer — Timed off device
that ensures a minimum of five minutes off
between compressor cycles.
Control Options
Standard Indoor Thermostats — Two stage
heating/cooling or one stage heating/cooling
thermostats shall be available in either manual
or automatic changeover.
Programmable Electronic Night Setback
Thermostat — Programmable electronic
thermostat shall provide heating setback and
cooling setup with 7-day, programming
capability. 1H/1C or 2H/2C models available.
IPB-99-7-EN-10-6-99