TEL AFA4000/E - Dual Output - Econ Output 2

AFA4000/E VAV Airflow Controller / p.145
8.5 Dual Output – Econ Output 2
The AFA4000/E has a second 0 – 10V control output that is available when the Econ power
supply unit is fitted. It can be configured for 4 functions using the pushbutton menu.
Function
Additional requirements
Description
Bleed damper
• Econ power supply unit
0 – 10 Vdc output to control a
secondary damper e.g. fresh air bleed
or supply air damper
Volume pressure
• Econ power supply unit
• Pressure cell PCB
• Duct restrictor device
0 – 10 Vdc volumetric output based on
duct volume measurement
Volume
• Econ power supply unit
• Sash position sensor
0 – 10 Vdc volumetric output based on
sash position and face velocity
calculation
Face Velocity
• Econ power supply unit
0 – 10 Vdc face velocity retransmission
output, 0-10Vdc / 0-1.00m/sec
(200fpm) e.g. 0.50m/sec = 5Vdc
8.5.1 Bleed Damper
The bleed damper function is used to operate a secondary output based on the Econ Output 1
voltage. It can be scaled and offset to give the required output direction and range. Examples
are using the second output as a Fresh Air or Room Air Bleed control voltage signal.
To access the ECON Configure Menu, navigate to Main Menu > Set up Monitor > Configure >
Econ Config.
Press the ↓ button to scroll down the menu list and press Mute to select the required option.
Note: The Configure menu is password protected. The default password is 0 0 0 0.
Note: The Monitor Set up Menu also includes Calibration and Password sub-menus which are
used by engineers to set up the system. If you enter any of the Monitor Set up sub-menus
by accident, press the ↑ and ↓ arrows together when the password is requested to
return to the Monitor Set up menu.
1. Select Output Type from the Econ Configure menu and press Mute to continue.