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Overview
General
Trane CeilAir overhead air conditioning systems (TR-OHS)
are constructed using the finest available materials/
components, state-of-the-art technology and quality
craftsmanship. The unit will provide years of trouble free
service if installed and maintained in accordance with this
manual. Damage to the unit from improper installation,
operation or maintenance is not covered by the warranty.
Due to advances in technology, components described
herein are subject to change without notice.
CeilAir TR-OHS systems are designed to be installed
indoors, unless otherwise noted on the equipment.
Propeller-type condensers, condensing units, drycoolers
and pump packages are designed for outdoor use.
Product Description
CeilAir TR-OHS systems are designed to be the most
versatile and flexible ceiling-mounted air conditioning
systems in the industry. The unit is available in air-cooled,
water-cooled, glycol-cooled and chilled-water
configurations. The cooling capacity in Btu/h will depend
on the unit size, which can range from 1 to 10 tons (3.5-35
kW), and can be either a single stage or dual stage unit.
In addition to cooling, other functional modes of opera-
tion include heating, humidification, dehumidification and
filtration to provide complete environmental control of a
conditioned space. The cabinet configuration is available
in a 2 ft x 4 ft frame for units ranging from 12,000 to 40,000
Btu/h (spot cooler or ducted) or a larger frame for units
ranging from 48,000 to 120,000 Btu/h (ducted only).
For ducted units, there are three configurations of airflow
patterns, dependent on unit: 90
through and in/ out-same-face (see
to the installation drawing provided with the unit for the
type of cabinet configuration and for the layout
dimensions.
Control Devices
Control interfaces are typically remotely mounted to a wall
or control panel.
The default control device for TR-OHS units is the A-Tech
digital thermostat, which provides basic control of the
system. Slightly different wiring is used with the
thermostat in single- and dual-stage units, as shown in
Figure 16, p.
22. The single-stage version is the A-Tech 1.1.
The two-stage version is the A-Tech 1.2. An operating
manual for the thermostat is provided with the unit under
separate cover.
AH-SVX008C-EN
o
right angle, straight
Figure 9, p.
14). Refer
Figure 1.
A-Tech digital thermostats
The advanced microprocessor controller is also available
for TR-OHS systems. This controller provides enhanced
features for more comprehensive control of the unit.
These features include full alarm system; input/output
monitoring status; full integrated control of heating,
cooling, humidification, and dehumidification and remote
communication with building management systems. An
operating manual for the controller is provided with the
unit under separate cover.
Figure 2.
Microprocessor controller and display
7
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