CHS-SVN011C-EN
7
Applications Considerations
Waterside
•
The low-temp air handling units should only be
used for applications that are well insulated.
•
These low-temp air-handling units are specifically
designed for cooler, freezer type applications
where there is a requirement for air temperatures
below 32°F. For that reason in these types of
applications the use of glycol is highly
recommended.
•
This equipment is also designed to be placed
indoors; therefore, special steps need to be taken to
run drain lines to their proper building site
drainage.
Airside
•
Some version models of these air-handling units
(AHU) are only able to provide constant volume to
the space (F0 units), special steps need to be taken
so that in applications above 32°F the fan does not
exceed a face velocity of 650 FPM to prevent
moisture carryover. As some units do not have VFD
capabilities, airflow modulation can only be
achieved by restricting the airflow. Please contact
Trane Rental Services for suggestions on
accomplishing this task. F1 model AHUs do have
the capability to modulate air since they are
equipped with a VFD and soft starter.
•
These unit does not have return air connections.
However, they do have the ability to connect to a
long throw adapter (F0 units) or to (4) 20” duct
connections (F1 units) to direct the supply air to the
place of choosing.
Water Treatment
Dirt, scale, products of corrosion and other foreign
material will adversely affect heat transfer. Therefore, it is
good practice to add strainers upstream the cooling coils
to efficiently help transfer heat.
Multiple AHU Applications
In order to prevent a decrease in airflow supply due to
excessive frozen coils, the unit triggers a timed defrost
cycle. While the cycle is on, fan will be turned off and
cooling will not be provided. In order to continuously meet
building load requirements TRS recommends the use of at
least (1) additional AHU to meet the building’s cooling
load while other unit(s) are in a defrost cycle.
