Reference Guide

The Braeburn Zoning Reference Guide 8 Part No. RG-0508-001
In normal operation, the weight arm will lift up when pressure increases. If the air 3.
is  owing left to right, position the weighted arm at 4:00. If the air is  owing right
to left, position the arm 8:00 when no zones are calling.
Adjust the weighted arm so that the damper is barely closed when all zones are 4.
calling.
Install an Electric Bypass
This option also uses a short duct between the supply plenum and
the return air plenum, but uses an electrically controlled damper to
reduce excess plenum pressure. The electrically controlled damper
is powered from a static pressure sensor that is mounted into the
plenum. As pressure increases in the supply plenum, the static
pressure sensor will register this increase and power the motorized
damper open slowly so as to relieve the excess pressure. As the
pressure is removed, the static pressure sensor will stop opening
the damper when the plenum pressure becomes less than the set-
point on the static pressure sensor.
Installing an electric bypass requires just a few steps.
Install a power open / power close damper and bypass duct from the supply side 1.
to the return side.
Mount the static pressure controller on a vertical surface near where the pressure 2.
sensor will be installed into the supply plenum.
Mount the pressure sensor into the supply plenum so the air blowing past the 3.
tube, and not directly into the end.
Wire the damper, the static pressure controller and the start position relay as 4.
shown in the SPC instructions.
Turn the HVAC blower on high and insure all zones are open. 5.
Use a  at head screwdriver to slowly turn the setscrew on the SPC clockwise. 6.
When you start to get near the right adjustment point, the damper blade on the
bypass damper will start to close and then stop. Continue moving the setscrew
clockwise until the damper is barely closed. The proper set-point is when all
zones are calling with the fan on high, and the bypass damper is just staying
closed.
Con rm the wiring by turning off all zones. The bypass damper should power 7.
open and stay open. If the wiring is wrong, startup will be noisy because the
bypass damper will power close when the zones are turned off.