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Installation
Figure 21. Pressure sensing
Outside Air
Pressure
Sensor
Sensor Mounting
Bracket Attached to Roof
Tubing Connector
(In vertical support)
Duct, space, and return plenum pressure transducer tubing schematic
Return Plenum
Space Static
Transducer
Transducer
Sensing Tube
to Return
Plenum
LO
HI
LO
HI
C
NO
NC
Sensing Tube to
Outside Air Reference
Refrigeration System
Condensate Drain Connections
All condensate drain connections must be connected to the
evaporator drain connections.
A condensate trap must be installed due to the drain
connection being on the "negative pressure" side of the
fan. Install the P-Traps at the unit using the guidelines in
Figure 22, p.
40.
40
Top Port Connection
2' x 3/16" OD Tubing
Factory Provided
Pneumatic Tubing
(Field Installed)
To Calibration
Solenoid
Duct Static
Transducer
LO
HI
Sensing Tube
to Discharge Static
Pressure Sensing Location
C
Calibration
NC
Solenoid
NO
Sensing Tube to
Space Sensing
Location
Figure 22. Condensate trap installation
Post
1.25" NPT
Female Connection
Field Supplied
Condensate Piping
Pitch the drain lines at least 1/2 inch for every 10 feet of
horizontal run to assure proper condensate flow. Do not
allow the horizontal run to sag causing a possible double-
trap condition which could result in condensate backup due
to "air lock".
Figure 23. Condensate drain locations for units with
stacked indoor coils
4.5"
2.25"
Cleanout
Plug
CONDENSATE
DRAIN OPENING
RT-SVX063G-EN
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