26 RT-SVX34C-EN
Installation General Requirements
Condensate Drain Connection
Each commercial rooftop unit is equipped with one (1) 1-1/4 inch Female PVC condensate drain
connection.
Refer to Figure 11, p. 23 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 Figure 14, p. 26.
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.
O/A Sensor & Tubing Installation
An Outside Air Pressure Sensor is shipped with all units designed to operate on variable air volume
applications 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 Figure 15, p. 27 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.
Figure 14. Condensate Trap Installation
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