WattMaster VAV System - Manual (Page 12)

Technical Guide
Operator Interfaces 12
Configuration
In order to correctly setup the WMVAV controller you must first con-
figure several parameters in regard to the type of HVAC unit and system
you have installed. Most of these values and operating parameters are
only set once, at the initial system setup and are never changed.
System Manager Instructions
From any menu screen press the “Setpoint” key. The unit selection screen
will appear requesting that you enter the unit ID number. Enter the cor-
rect unit ID number of the WMVAV controller you want to configure
and hit the “Enter” key. You will see the screen shown below.
1)Change Setpoint
2)Configure Unit
3)Damper Force
ESC) Exit Menu
Press “2” on the keypad to enter Configuration Screen #1.
Modular Service Tool Instructions
From any menu screen press the “Configuration” key. The unit selec-
tion screen will appear requesting that you enter the unit ID number.
Enter the correct unit ID number of the WMVAV controller you want to
configure and hit the “Enter” key. You will then see unit configuration
screen #1.
Configuration Screen #1
WMVAV Config ID 59
Constant Volume Mode
Active : NO
[0=NO 1=Yes]
This HVAC unit can be configured to operate as a Constant Volume or
VAV unit. The Constant Volume Mode does not provide Static Pressure
Control. You can install a Duct Pressure Sensor on a Constant Volume
unit and only monitor the Static Pressure. This is the only mode that
supports dehumidification.
Configuration Screen #2
WMVAV Config ID 59
Controlling Sensor
SUPPLY AIR
Press”0” to Change
Press the “0” key to select the desired method of control and the third
line of the display will change text to show which sensor has been se-
lected as the Controlling Temperature for the WMVAV controller. Avail-
able selections are:
SUPPLY AIR Supply Air Sensor
(Occupied Cooling with
Morning Warm-up)
*RETURN AIR Return Air Sensor
(Occupied Cool, Heat &
Vent)
SPACE TEMPERATURE Space Temperature Sensor
(Occupied & Unoccupied
Cool, Heat & Vent)
OUTSIDE AIR Outdoor Temperature Sensor
(Occupied Cool, Heat &
Vent)
LOCAL ANALOG VALUE Local Analog Value
* On WMVAV controller codes earlier than version 1.01, if you
select “RETURN AIR” you will have Occupied Cool, Heat &
Vent as opposed to Occupied Cooling & Venting Only as the
previous code provided.
Configuration Screen #3
WMVAV Config ID 59
Economizer Control
By This AHU: YES
[0=NO 1=YES]
If your AHU has outside air dampers, it is recommended that you allow
the WMVAV controller to modulate these dampers in the economizer
mode so that it can be used as the first stage of cooling. If you don’t
have outside air dampers, or you decide to let a separate controller main-
tain these dampers, select NO for this option.
Configuration Screen #4
WMVAV Config ID 59
Fan Cycle Mode
Needed: Yes
[0=NO 1=Yes]
If you need proof of airflow before allowing any heating or cooling
stages to operate, install a differential pressure switch with a contact
closure that is connected to analog input #7 and select this option. If
this option is not selected, the WMVAV controller assumes there is ad-
equate airflow anytime the fan is running and ignores this signal.
Programming The WMVAV Controller