AP Expert VT-110, User Manual

Page: 42 / 84

Chapter 11: Air Inlets
Configuring Air Inlet Parameters
Before You Begin
NOTE: Inlet openings are defined as a percentage of their total opening time.
1. Using the menu select arrow keys, navigate to Inlet→Stage Opening .
NOTE: This menu is accessible if the inlet is enabled.
2. Set the following parameters:
Position This is the current position of the air inlet. This value
cannot be modified.
Test mode This is the room temperature that is used in test
mode. This value can only be modified in the “Test
Mode” menu
Hysteresis When the actuator isn’t moving, a minimum opening
or closing command is necessary for the actuator to
start moving. This value is called the “hysteresis”
and it can be adjusted from 1 to 15 seconds (time-
rbased inlet) or from from 2 to 10% (potentiometer-
based inlets). The hysteresis prevents the actuator
from moving constantly. Set it to the desired value.
Min Fan Speed Set the fan speed over which the inlet can start
opening.
Closed This is the position of the air inlet during the “Off
Time” portion of minimum ventilation cycles. Set this
position to the desired value.
Min Vent This is the position of the air inlet during the “On
Time” portion of a minimum ventilation cycle.
Stage #x (min) Assign an inlet opening (in %) with the startup of
each variable fan stage.
Stage #x Assign an inlet opening (in%) with each on/off fan
stage and with the end of each variable fan stage.
Over Opening Assign an inlet position to the over-opening stage.
*This parameter is accessible if the over-opening
function is enabled in the Installation Setup.
Over-Opening Bandwidth Specify the number of degrees above the start tem-
perature of the last fan stage the inlet must reach its
over-opening position. *This parameter is accessi-
ble if the over-opening function is enabled in the
Installation Setup.
42 890-00081 Expert VT-110