AFAM System & AFAM+
171
Advanced Fresh Air
Management Plus (AFAM+)
System
An advanced microprocessor controlled fresh air
management system also provides programmable
control of the O
2
and CO
2
levels in the container,
and data logging of the O
2
and CO
2
gas level
readings.
The AFAM+ system includes all AFAM system
components plus a gas sensor unit, sensor filter,
vent loop, pressure relief valve assembly and
single purge port. The controller can be set to
control the O
2
level in the container between 0 to
21% and the CO
2
level between 0 to 25%.
Setting AFAM+ System Values
The AFAM option submenu in the Configuration
menu is factory set to AFAM+. The controller
then adds the AFAM, AFAM Delay, AFAM Rate,
O
2
Min and CO
2
Max submenus to the Setpoint
menu. If a replacement controller or new software
is installed, a controller auto configuration will
detect the AFAM+ option when the AFAM door
control module and gas sensor are connected to
the controller. When an auto configuration is
performed, the controller sets the AFAM Option
in the Configuration menu to Analyzer. To operate
the AFAM+ system, the AFAM Option must be
manually set to AFAM+.
• Analyzer: This setting turns on data logging
for O
2
and CO
2
gas levels only. The AFAM+
system does not operate.
• AFAM+: This setting turns on the AFAM+
system to control O
2
and CO
2
gas levels. The
controller then adds O
2
Min and CO
2
Max
submenus to the Setpoint display in addition
to the AFAM, AFAM Delay and AFAM Rate
submenus.
The default setting for AFAM in the Setpoint
menu is the last value set (Off, Units or Demand).
AFAM must be set to Demand to control the vent
door to the O
2
and CO
2
gas levels.
Starting the AFAM+ System
1. Press the SETPOINT key. The Setpoint menu
appears with the cursor in the “TEMP SETP”
line.
2. Press F2 key to scroll to “AFAM” line.
3. To change the mode setting, press F4 key.
Cursor moves to end of menu line and flashes.
WARNING: After installing or servicing
the AFAM door assembly, remove all tools
and install the vent grille before starting
the AFAM system. Failure to replace the
vent grille before turning the AFAM
system on may result in personal injury or
unit damage.
1. Gas Sensor Assembly (Mounts in Evaporator)
2. Vent Door Assembly and Damper Motor
3.
Interface Board and Cable (Mounts in Control
Box)
Figure 65: AFAM+ System
WARNING: The vent door and motor
actuator arm move immediately when the
F4 key is pressed to turn the AFAM system
to “DEMAND”, “UNITS” or “OFF”.
Keep hands and tools away from the air
exchange system components to prevent
personal injury or unit damage.
AXA0251
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