Packaged Gas/Electric Rooftop Units - Trane

RT-PRC006-EN
Application
Considerations
Application of this product should be
within the cataloged airflow and cooling
considerations.
Low Ambient Cooling
The Precedent line features, with
ReliaTel microprocessor controls, low
ambient cooling down to 0°F. With
electromechanical controls, Precedent
features low ambient cooling to 40°F. The
following options need to be included/
considered when low ambient
applications are required: continuous fan
operation, crankcase heaters, thermal
expansion valves, frostat. Contact your
local Trane Representative for more
assistance with low ambient cooling
applications.
Barometric Relief
This product line offers an optional
barometric relief damper for use in
conjunction with economizer option. This
accessory consists of gravity dampers
which open with increased pressure. As
the building air pressure increases, the
pressure in the unit return air section also
increases, opening the dampers and
relieving the conditioned space.
NOTE: THE EFFECTIVENESS OF
BAROMETRIC RELIEF DAMPER DURING
ECONOMIZING OPERATION IS SYSTEM
RELATED.
PRESSURE DROP OF THE RETURN AIR
SYSTEM SHOULD BE CONSIDERED TO
CONTROL BUILDING PRESSURIZATION.
Heating Operation
The heat exchanger is manufactured
with aluminized steel. To prevent
condensation within the heat exchanger,
do not exceed 50% outside air or a
minimum mixed air temperature of 40°F.
Condensate Trap
The evaporator is a draw-thru
configuration. A trap must be field
provided prior to start-up on the cooling
cycle.
Clearance Requirements
The recommended clearances identified
with unit dimensions should be
maintained to assure adequate service
maximum capacity and peak operating
efficiency. Actual clearances which
appear inadequate should be reviewed
with the local Trane sales personnel.
Unit Pitch
These units have reversible sloped
condensate drain pans. Units must be
installed level, any unit slope must be
toward the side of unit where condensate
drain is connected.
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