Trane Voyager Commercial, Installation, Operation And Maintenance Manual

Page: 23 / 156

RT-SVX34R-EN 23
Installation General Requirements
Condensate Drain Connection
Each commercial rooftop unit is equipped with one (1)
1-1/4 inch Female NPT (threaded) drain connection.
Refer to “Unit Dimensions and Weights,” p. 13 for the
location of the connector. A condensate trap must be
installed due to the drain connection being on the
“negative pressure” side of the fan. Install a P-Trap at
the unit using the guidelines in
, p. 23 .
Pitch the drain line at least 1/2 inch for every 10 feet of
horizontal run to assure proper condensate flow.
Ensure that all condensate drain line installations
comply with applicable building and waste disposal
codes.
N No otte ess::
• For units with optional Condensate
Overflow Switch (COF), the switch will not
work properly if unit is not level or slightly
sloped toward switch.
• To ensure proper condensate flow during
operation the unit and the curb must be
level.
Figure 15. Condensate trap installation
Condensate Overflow Switch
This switch protects building from condensate
overflow damage. It is factory-installed and tested.
Figure 16. Condensate overflow switch location
O/A Sensor & Tubing
Installation
An Outside Air Pressure Sensor is shipped with all
units designed to operate on traditional variable air
volume applications (non-SZ VAV) and units with
Statitrac
™ .
A duct pressure transducer and the outside air sensor
is used to control the discharge duct static pressure to
within a customer-specified controlband. Refer to the
illustration in
, p. 24 and the following steps to install
the sensor and the pneumatic tubing.
1. Remove the O/A pressure sensor kit located inside
the fan section. The kit contains the following items;
• an O/A static pressure sensor
• a sensor mounting bracket
• 50’ of 3/16” O.D. pneumatic tubing
• mounting hardware
2. Using two #10-32 x 1-3/4” screws provided, install
the sensor's mounting bracket to the factory
provided bracket (near the fan section).
3. Using the #10-32 x 1/2” screws provided, install the
O/A static pressure sensor vertically to the sensor
bracket.
4. Remove the dust cap from the tubing connector
located below the sensor in the vertical support.
5. Attach one end of the 50' x 3/16” O.D. factory
provided pneumatic tubing to the sensor's top port,
and the other end of the tubing to the connector in
the vertical support. Discard any excess tubing.