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VAV/Zone Controller Package
START-UP & COMMISSIONING
VAV/Zone Controller Configuration & Setup
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 aff ects the various box types in
the occupied and unoccupied modes is contained in the Occupied
Mode Sequences and Unoccupied Mode Sequences that follow
later in this manual. Options available are No - Heat can operate
without fan or Yes - Heat cannot operate without fan.
Push-Button Override Group ID#
During Unoccupied Mode, all VAV/Zone Controllers with a cor-
responding 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 offi
ces could restore
occupied mode for just their zones and not aff ect other zones in
the building.
The default group ID number for all VAV/Zone Controllers is set
at the factory as 1. If you don’t want a specifi c zone(s) to be part
of that group, you must give each one a distinct group number
between 2 and 16.
NOTE:
WattMaster recommends that your groups consist
of at least 3 zones to ensure minimum airfl ow across the
HVAC unit coil.
Dump Zone
The dump zone is a controller without an actuator that is used
to control a duct heater or Auxiliary Heat. If this VAV/Zone
Controller is to be used as a Dump Zone, set this confi guration
to 1=Yes. Options available are Yes or No.
AHU Heating Call
This setting is located under the
Setpoints Menu
or
Setpoints
Screens
and is used only for the Unoccupied mode. For Non-Fan
Powered Terminal units, this temperature setpoint is used to al-
low a heating device such as baseboard heaters to be energized
in an attempt to satisfy the heating demand prior to initiating
the HVAC unit’s 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 Control-
ler sends a signal to the Unit Controller to initiate the HVAC unit
Supply Air Heating Mode. This setpoint temperature can be set
higher or lower than the Space Heating Setpoint.
NOTE:
This setpoint follows the Unoccupied Heating
Setpoint Setback.
Auxiliary Heat
The Auxiliary Heat option allows for a separate setpoint that is
diff erent from the other heating setpoints. The Auxiliary Heat
Relay energizes at 0.5ºF below the Auxiliary Heat Setpoint
and de-energizes 0.5ºF above the Auxiliary Heat Setpoint. The
Auxiliary Heat will continue to function regardless of the HVAC
Mode the Unit Controller is in or at any airfl ow condition. This
is typically used to control baseboard or other perimeter heat
sources.
See
Table 3, page 31
for a complete layout of the vari-
ous fan and heat relay staging points.
Expansion Relays – Steps of Reheat
If only 1 stage of box heat is required and this is not a Fan Termi-
nal Unit, use the Auxiliary Heat relay on the VAV/Zone Controller
and select “Used for BOX Re-heating” in the Confi guration. Also
in “Stages of Box Re-Heat” confi gure for 1 stage.
If the box requires more than 1 stage of reheat, the OE325-03
VAV/Zone Controller Expansion Module must be used and 2 or
3 stages of heat must be selected. If a Fan Terminal Unit is used,
use the OE325-03 VAV/Zone Controller Expansion Module for
all stages of heat.
Box Reheat
The box heat will be energized whenever the Space Temperature
drops below the Occupied Heating Setpoint and the damper will
go to the Minimum Damper During Box Heating Mode setpoint.
Window Open Detection
When this feature is selected, if the contacts on terminals BIN
and GND are open, the controller will control to the Unoccupied
Cooling and Heating Setpoints, and when the contacts are closed,
it will go control to the Occupied Cooling and Heating Setpoints.
Normally closed operation can be selected by confi guring reverse
contact polarity. See the VAV/Zone Controller Inputs and Outputs
section for more details.
Motion Sensor Occupancy Detection
When this feature is selected, if the contacts on terminals BIN
and GND are open, the controller will control to the Occupancy
Cooling and Heating Setback Setpoints. When the contacts are
closed, it will go back to the Occupied Cooling and Heating Set-
points. Normally closed operation can be selected by confi guring
reverse contact polarity. See the VAV/Zone Controller Inputs and
Outputs section for more details.
Type of Space Sensor
Choose the type of Space Sensor that you are using - Analog or
Digital.
Stand Alone Box Running Continuous Occupied
Mode
Choose if unit is a Stand-Alone Box that operates independently
without requiring communication with the HVAC unit controller.
