Trane Voyager TS 150-300 Series Installation, Operation And Maintenance Manual page 34

Factory-Mounted Unit Options
Note: In order to perform the last part of this operation, it
will be necessary to remove the barometric relief
filter, open the barometric relief damper, and reach
inside through the barometric relief outlet to
access and connect the copper exhaust elbow to
the smoke detector exhaust tube.
8. Connect the leg of the plastic elbow without the vinyl
tubing attached that was installed in
smoke detector inlet tube pushing it onto the piece of
vinyl tubing attached to the inlet tube.
9. Refer to Figure 23, p. 34
air smoke detector to the unit wiring harness.
10. This completes the installation of the return air smoke
detector. If the unit's air filter(s) and/or barometric relief
filter were removed to ease installation of the smoke
detector, they need to be replaced at this time.
Airflow and Sampling
Refer to the instructions provided below regarding unit
airflow to assure that the return air smoke detector will
function properly.
Important: The return air smoke detector is designed to
shut off the unit if smoke is sensed in the
return air stream. This function is
performed by sampling the airflow entering
the unit at the return air opening. Observe
the following instructions to assure the
airflow through the unit is sufficient for
adequate sampling. Failure to follow these
instructions will prevent the smoke detector
from performing its design function.
In order for the return air smoke detector to properly sense
smoke in the return air stream, the air velocity entering the
unit must be between 500 and 4000 feet per minute. Most
models of equipment covered by this instruction will
develop an airflow velocity that falls within these limits
over the entire airflow range specified in the evaporator
fan performance tables.
Certain models, however, if operated at low airflow, will
not develop an air velocity that falls within the required
500 to 4000 feet per minute range. For these models, the
design airflow shall be greater than or equal to the
minimum specified in Table
Table 7. Minimum allowable airflow
Unit Model Number
TSD180, THD180
Notes:
• Airflow through the unit is affected by the amount of
dirt and debris accumulated on the indoor coil and
filters. To insure that airflow through the unit is
adequate for proper sampling by the return air smoke
detector, complete adherence to the maintenance
34
Step 5 to the
for wire connections of return
7.
Minimum Allowable
Airflow with Return Air
Smoke Detector
5300 CFM
procedures, including recommended intervals
between filter changes and coil cleaning, is required.
• Periodic checks and maintenance procedures must be
performed on the smoke detector to insure that it will
function properly. For detailed instructions concerning
these checks and procedures, refer to the appropriate
section(s) of the smoke detector Installation and
Maintenance Instructions provided with the literature
package for this unit.
Important: Refer to the service literature provided for
testing and other information about the
smoke detector or if problems are
encountered.
Figure 23. Smoke detector wiring scheme
RT-SVX25Q-EN