Zone Damper Control — Zone damper control allows
the bypass controller to position each zone damper associ-
ated with its system. Each zone damper can be indepen-
dently programmed full-open or full-closed. The System Setup
Enable option is used to control the system dampers.
The full-open or full-closed position of each zone damper
associated with the bypass controller is maintained while sys-
tem setup is enabled. The bypass controller automatically
modulates its own bypass damper full closed and each zone
damper full open.
During zone damper control operation, equipment heat-
ing and cooling is deenergized, the system supply air fan is
energized, all zone dampers are at the maximum open
position, and the bypass damper is in the minimum open
position.
To activate the System Setup Enable option (zone damper
control), set category 5, option 7 to ON.
NOTE: During System Setup Enable, the bypass controller
will disable the operation of every device on its network.
The bypass controller will only control the damper position
of the monitor thermostat and zone controllers associated with
its system.
SYSTEM SETUP ENABLE DISPLAY — The bypass con-
troller indicates the device address of the zone it is currently
communicating with in the upper left part of the display. All
zone dampers are set to the maximum open position upon
activating System Setup Enable.
During System Setup Enable, zone damper information is
displayed by the bypass controller based on the following
annunciators:
• A flashing "O" annunciator indicates the damper is modu-
lating open. A continuous "O" annunciator indicates the
damper is at its maximum open or maximum airflow
position.
• A flashing "C" annunciator indicates the damper is modu-
lating closed. A continuous "C" annunciator indicates the
damper is at its full closed or minimum airflow position.
NOTE: For pressure independent thermostat operation, the
"O" or "C" annunciator may not stop flashing because the
thermostat will continuously modulate its damper to main-
tain the airflow set point. If the device does not control a
damper, the bypass controller continuously indicates an "O"
annunciator.
• A "CE" indicates that there is a communication problem
between the bypass controller and the device at the ad-
dress shown.
• A "dE" indicates that there is a damper error at the dis-
played zone.
SELECTING ZONE CONFIGURATION — Press the In-
creaseAddress button if the desired device address is greater
than the device address currently displayed. See Fig. 6. Press
the Decrease Address button if the desired device address is
less than the device address currently displayed.
NOTE: When zone damper control is activated, it will ini-
tially display the highest address scanned. The bypass con-
troller will not display its own device address.
POSITIONING A ZONE DAMPER — To position a closed
zone damper open or an open zone damper closed, press both
left information buttons simultaneously.
DEACTIVATING ZONE DAMPER CONTROL — Zone
Damper Control is deactivated by pressing the lower right
information button while the current system pressure is be-
ing displayed.
NOTE: When Zone Damper Control is deactivated it re-
leases control of each zone damper. The monitor thermostat
is allowed to energize the fan relay, but must wait 5 minutes
before selecting a system mode.
Fig. 6 — Zone Damper Control
Programming Buttons
7
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