40
RT-SVX072A-EN
the largest open area that will not be affected by sudden static pressure changes.
Figure 19. Pressure sensing
Outside Air Sensing Kit
Top Port Connection
Outside Air
Pressure Sensor
Factory Installed
Bracket
To Calibration
Solenoid
Return Plenum
Transducer
Space Static
Transducer
Duct Static
Transducer
Sensing Tube to
Discharge Static Pressure
Sensing Location
Sensing Tube to
Space Sensing Location
Calibration
Solenoid
Sensing Tube to
Outside Air Reference
Sensor Mounting
Bracket
Tubing Connector
(in vertical support)
2’ x 3/16” OD Tubing
Factory Provided
Pneumatic Tubing
(Field Installed)
Duct, Space and Return Plenum Pressure Transducer Tubing Schematic
Sensing Tube
to Return
Plenum
LO HILO HI
LO HI
C
NO
NC
C
NO
NC
SPACE PRESSURE TRANSDUCER
& SOLENOID ASSEMBLY
DUCT STATIC
TRANSDUCER ASSEMBLY
OUTSIDE AIR REFERENCE
TUBE CONNECTS HERE
RETURN AIR TRANSDUCER
& SOLENOID ASSEMBLY
TRAQ TRANSDUCER
& SOLENOID ASSEMBLY
Duct Staic Pressure Control
Gas Heat Units (SFH_)
All internal gas piping is factory-installed and pressure
leak-tested before shipment. Once the unit is set into
place, the gas supply line must be field-connected to
the elbow located inside the gas heat control
compartments.
IInnssttaallllaattiioonn
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