Install Instructions

STATIC PRESSURE CONTROL (SPC)
3 69-1526
TROUBLESHOOTING
If the SPC does not operate as specified in the Checkout procedure, see Table 1.
Table 1. Troubleshooting.
Problem Possible Trouble Solution
SPC does not operate the damper. Problem with the tubing. Verify that the tubing is not kinked
or plugged.
Wired incorrectly. Verify the wiring.
Bypass damper closes as zones are
satisfied.
Incorrectly wired damper. Verify that the N.C. and N.O. are
correctly wired to the damper.
Damper does not open enough when
the smallest damper is the only one
calling.
SPC is set too high. Decrease the pressure setting by
turning the adjustment screw up
(counterclockwise).
Damper does not close fully when all
zones are calling.
SPC set too low. Increase the pressure setting by
turning the screw down (clockwise).