JACKSON SYSTEMS SPC-800 Static Pressure Control for use with Bypass Dampers Instruction Manual

: July 29, 2024
: JACKSON SYSTEMS

Table of Contents

JACKSON SYSTEMS SPC-800 Static Pressure Control for use with Bypass
Frequently Asked Questions
HOW THE BYPASS SYSTEM WORKS
INSTALLING
ADJUSTINGTHESTATICPRESSURECONTROL
SPECIFICATIONS
TERMINAL DESIGNATIONS
Contact
References
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JACKSON SYSTEMS SPC-800 Static Pressure Control for use with Bypass

Dampers

The SPC-800 is a static pressure control device designed for use with bypass dampers in HVAC systems. It helps maintain proper airflow and static pressure by incorporating a floating type motorized damper and solid-state switching technology.

Installation Instructions:

Mount the bypass damper and static pressure control assembly in the return air section of the HVAC system.
Ensure the sensing probe is installed with the arrow pointing in the direction of airflow.
Mount the control in a vertical position.
Connect a 24V 40VA transformer to power the system.

Adjusting the Static Pressure Control:

Use 3/8″ OD plastic tubing to connect the pressure control. Follow these steps to adjust the static pressure:

Confirm HVAC system balance.
Ensure all zone dampers are open.
Close the bypass damper.
Ensure the fan is running.
Use the setpoint adjustment knob to align with the arrow for desired static pressure.

Frequently Asked Questions

Q: What is the factory-set static pressure for the SPC-800?
- A: The factory setting is at 0.40 W.C.
Q: What does an LED indicator on the SPC-800 signify?
- A: An LED ON indicates that the damper is driving open.
Q: How should I connect the tubing to the pressure control?
- A: Use 1/4″ tubing connected to P1+ (dark gray) high-pressure fitting on the pressure control.

HOW THE BYPASS SYSTEM WORKS

As individual zone dampers open and close, the system static pressure will rise and fall. In order to maintain proper airflow and static pressure through the HVAC system, a bypass system incorporating a floating type motorized damper and a static pressure control should be used. The static pressure control is equipped with solid-state switching and timing circuit to enhance operation and improve reliability

INSTALLING

INSTALLINGTHEBYPASSDAMPERANDSTATICPRESSURECONTROL ASSEMBLY

The bypass damper should be installed with the bypass air being discharged into the return air plenum (or above the ceiling if this area is used as a common return). The static pressure control should be installed so that the diaphragm is in the vertical position. The high pressure side (P1 +) of the static pressure control should be connected to the plastic sensing probe and inserted in the main supply plenum, downstream of the bypass damper and at least 3 feet from the air handling unit inastraight section of duct at the center line. The sensing probe is 2.5” (6.35cm) x 1/4” (6mm) O.D. and is connected to the pressure control with 1/4” O.D. plastic tubing. The sensing probe should be installed with the arrow in the direction of airflow. The sensing probe, 6’ of plastic tubing, and mounting hardware are furnished with static pressure control

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ADJUSTINGTHESTATICPRESSURECONTROL

Confirm that the HVAC system has been properly balanced.
Confirm that all zone dampers are in the open position.
Confirm that the bypass damper is in the closed position.
Confirm that the fan is running.
Use the setpoint adjustment knob to set the static pressure by aligning with the arrow