VAV/Zone
Configuration &
Setup
There are a few configuration selections available which can be used
to tailor the software operation to match the mechanical equipment the
controller is installed on. These are programmed using either the Modular
System Manager, the Modular Service Tool, the System Manager TS, or
a personal computer with Prism computer front end software installed
on it. See the
Modular Service Tool and System Manager Operator
Interface Technical Guide
, the
System Manager TS Technical Guide
,
or the
Prism Computer Front End Technical Guide
for complete VAV/
Zone Controller programming information.
General
Several options are available to configure the VAV/Zone Controller for
the appropriate equipment it is installed on. All of these options can be
set from the “Configuration” menu with the exception of “AHU Heat
Call” which is set from the “Setpoints” menu. Again, please refer to the
Operator’s Interface Technical Guide
or the
Prism Computer Front-End
Technical Guide
for detailed programming information.
Box Control Method
Set this configuration item for the type of box the VAV/Zone Controller
is used on. The options available are:
0 =
Cooling Only Box (With Reheat if Required)
1 = Heating/Cooling Changeover Box
2 = Series Fan Powered Box With Reheat
3 = Parallel Fan Powered Box With Reheat
Damper Operating Mode
This option sets the direction of rotation the damper moves when driving
towards its full open position. The options available are:
0 = Direct Acting (Clockwise-to-Open Damper)
1 = Reverse Acting (Counterclockwise-to-Open Damper)
Voting Zone
If this particular VAV/Zone Controller is being used on a “Zoning”
system as opposed to a true VAV system, this option must be set to al-
low the MiniLink Polling Device to determine if this controller should
be included in the zoning system voting process. If this is set to “Yes”,
this controller will be included in the voting process. If this is a zoning
system and it is set to “No”, this controller will not vote in the zoning
system voting process. If it is a true “VAV” system, the option should
be set to “No”. The options available are:
0 = Yes
1 = No
Pressure Independent Boxes-Airflow @ 1”
W.C.
If this is a pressure independent box, this option allows you to calibrate
the box CFM correctly using the box manufacturer’s “K” factor. Enter
the correct “K” (CFM) factor for the inlet diameter of the box you are
configuring.
Expansion Relays - Steps of Reheat
If the box has reheat supplied by an electric coil, this option must be set
for the number of electric heating stages on the box. If the box has hot
water heat with a 2 position hot water valve, set the number of stages
to “1”. For hot water heat with a proportional hot water valve, this must
be set for “0”. Options available are:
0 = No Staging
1 = 1 Stage of Reheat
2 = 2 Stages of Reheat
3 = 3 Stages of Reheat
Proportional Heating Signal
If the box has hot water reheat using a proportional hot water valve, set
this option to match the voltage signal required by the hot water valve
you are using. Options available are:
0 = 0-10 VDC Voltage Signal
1 = 2-10 VDC Voltage Signal
Allow Box Heat With AHU Heat
If the box you are using has reheat or auxiliary heat, configuring this
setting to 1=Yes will allow the box heat to operate at the same time as
the HVAC unit heat. Options available are:
0 = No
1 = Yes
Main Fan Status
If the VAV/Zone Controller is installed on a non-fan powered box that
has reheat, set this option to “Yes” in order to enable box reheat only
when the HVAC unit fan is running. A full description of how this setting
affects the various box types in the occupied and unoccupied modes is
contained under the “Mode Sequence” heading that follows later in this
manual. Options available are:
0 = No Heat can operate without fan
1 = Yes Heat cannot operate without fan
Push-Button Override Group ID#
During Unoccupied Mode, all VAV/Zone Controllers with a correspond-
ing
Group ID#
will resume Occupied operation whenever any of the
VAV/Zone Controllers with the same
Group ID #
has its push-button
depressed to initiate an override condition. This allows you to group
zones in various areas of the building. For example, individual tenants
with several offices could restore occupied mode for just their zones and
not affect other zones in the building. If you don’t want a specific zone
to be a part of any group, enter a ‘
0
’ for its Group ID #.
Dump Zone
If this VAV/Zone Controller is to be used as a “Dump Zone”, set this
configuration to 1=Yes. The dump zone is a controller without an
actuator that is used to control a duct heater or auxiliary heat. Options
available are:
0 = No
1 = Yes
AHU Heat Call
This setting is located under the “Setpoints” menu on screen #3. This
is used only for the unoccupied mode. For non-fan powered terminal
units, this temperature setpoint is used to allow auxiliary heat such as
baseboard heaters to be energized in an attempt to satisfy the heating
demand prior to initiating the HVAC unit Supply Air Heating mode.
For fan powered terminal units, this setpoint can be used to operate the
series or parallel box to satisfy the heating demand by using plenum
air and reheat prior to initiating the HVAC Supply Air Heating mode.
During unoccupied mode, when the temperature in the space drops
below the AHU Heat Call setpoint, the VAV/Zone Controller sends a
signal to the VCM-X Controller to initiate the HVAC unit Supply Air
Heating Mode. This setpoint temperature can be set higher or lower than
the Space Heating Setpoint.
VAV/Zone Configuration
19
Non-Modular ZCAP Technical Guide
Sequence of Operations
