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The following menu items allow the inlet to open proportionately to fans set up for proportional control. Natural
inlets typically open proportionately to the fans. You must use a static pressure sensor (even if you don’t plan on
using one with the controller) to set up the inlet openings for each stage of fan ventilation. Measure the static
pressure while one fan group is running and adjust the inlet opening until the static pressure is at the correct level.
Record the inlet opening size. Next, measure the static pressure while two fan groups are running and adjust the inlet
opening until the static pressure is at the correct level. Repeat the process until all of the fan groups are running.
Sidewall, Tunnel & Ceiling Inlet Settings
Inlets are typically a proportionally controlled device so the menu items Open this distance and Close this distance
are not used. Instead, when an inlet needs to open or close more, the proportional control or static pressure control
settings are used.
Reminder: The Inlets are listed under the DEVICE / EQUIPMENT SETTINGS menu.
The controller has a minimum motion time of three seconds. Opening sizes should be set large
enough to allow a minimum of three seconds movement from one setting to the next.
Static Pressure Pause Timer
Input the time the inlet should pause after it moves due to a change in static pressure. The pause time prevents the
inlet from responding too often to changes in static pressure. This menu item appears only when the inlet is set up
to run according to static pressure. If the inlet moves too often, try increasing the time entered here.
The following
display screens use readings from one of each three inlet groups. The inlet groups are all the same, so for the
purpose of space, we have used some from each group.
SIDEWALL INLET GROUP #1 SETTING
Z1-S01
Static Pressure Pause Timer: 0:15
Operating Mode
Refer to the
Operating Modes
section for a list of operating modes.
SIDEWALL INLET GROUP #1 SETTING
Z1-S01
Operate as: Temp Natural Only
Proportional Control
CONTROL
SETTINGS
DEVICE / EQUIPMENT SETTINGS
Z1-S01
PRESS ENTER TO VIEW SETTINGS
ENTER