WattMaster VAV System - Manual (Page 28)

Technical Guide
Operator Interfaces 28
Programming The VAVBOX Controller
Configuration
In order to correctly setup the VAVBOX controller you must first con-
figure several parameters in regard to the type of system and operating
parameters for the VAVBOX controller you have installed. Most of these
values are and operating parameters are only set once, at the initial sys-
tem 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 VAVBOX 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 the first unit configuration screen.
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 VAVBOX controller you want
to configure and hit the “Enter” key. You will then see unit configura-
tion screen #1.
Configuration Screen #1
HC Box Cnfg IDxxxx
Box Control Method
COOLING ONLY BOX
[Enter Type 0 - 3]
This Box Control code will operate in one of four possible modes:
0 = COOLING ONLY BOX
1 = H/C CHANGEOVER BOX
2 = SERIES FAN BOX
3 = PARALLEL FAN BOX
Configuration Screen #2
HC Box Cnfg IDxxxx
Damper Operating
Mode: DIRECT ACTING
[0=Direct 1=Reverse]
Enter a ‘0’ for DIRECT ACTING or a ‘1’ for REVERSE ACTING.
If the damper opens in a clockwise direction, it is DIRECT ACTING
If the damper opens in a counterclockwise direction, it is REVERSE
ACTING
CAUTION:
If you change this setting, you MUST cycle power
to the controller to allow it to re-calibrate the
damper feedback positions for its’ new direction
of control!
Configuration Screen #3
HC Box Cnfg IDxxxx
Pr Independent Boxes
Airflow @ 1" WG
Constant..: 1200 CFM
If this is a Pressure Independent Box, you must enter this airflow con-
stant so that the CFM readings can be correctly calculated. This airflow
constant is provided by the box manufacturer and depends on the diam-
eter of the duct.
Configuration Screen #4
HC Box Cnfg IDxxxx
Expansion Relays
[Optional]
Steps of Re-Heat: 2
If you require the VAVBOX Controller to control reheat for the zone it
is installed in, you must include a relay expansion board and then con-
figure the number of heating stages ( 1, 2 or 3 ) that it will be controlling
whenever there is a heating demand in the space. Enter ‘0’ if you don’t
require this option.
Configuration Screen #5
HC Box Cnfg IDxxxx
Proportional Heating
Signal..: 0 - 10 VDC
[0 = 0-10 1 = 2-10]
Select this option to change the range of the proportional heat output
from 0-10 VDC to 2-10 VDC.
Configuration Screen #6
HC Box Cnfg IDxxxx
Allow Box Heat With
AHU Heat....: NO
[0=NO 1=YES]
Set this option to 1 = YES to allow the heating relays controlling box
heat to remain on even when the AHU is in Supply Air Heating Mode.
This is used as a method to provide supplemental heat if for some rea-
son the AHU heat cannot satisfy the heating demand