Honeywell CVL4022ASVAV1 Engineering Manual page 89

Net Data
NCI/Field Type
Type ubyte
PressDependent ubyte
TR Speed
fpm
Table 23. Configuration Parameters (Continued)
AP
Default Internal
Val Units
0 Flow Control Type
0 – Normal, The flow is controlled to satisfy the temperature
control algorithm.
1 – Flow Tracking, The temperature control is turned off and the air
flow set point equals the sum FlowTrackIn and TrackModeOffset.
This feature is used to balance the flow between several input vav
boxes and one exhaust vav box in a room. If a non zero value is
assigned to TrackModeOffset, then the room is pressurized or de
pressurized.
Notes:
Flow Tracking ignores window open flow settings.
Flow Tracking ignores morning warmup configuration.
Flow Tracking follows emergency command flow settings.
2 – ShareWall Module, The temperature control loop is turned off
and the flow is controlled by the wall module at another master
node. In this case nviShare is bound to nvoShare of the master
node and the information received in nviShare is used to control
the air flow. The master node has the temperature sensor
connected to it and controls the space temperature by its own
damper and the other dampers of all nodes bound to it. This
feature is used when:
Only one temperature sensor is used in a large area to control
several nodes.
There is a need to reprogram multiple satellite controllers based
on flexible floor plans. Each controller is fitted with a wall module
and the units configured as a ShareWallModule with a valid
nviShare network connection respond as satellites of the master
controller providing nvoShare data.
0 Enable pressure dependent control logic in the airflow control loop.
Pressure dependent control does not require an airflow sensor.
0 – pressure independent is implemented using a cascaded
control algorithm. The temperature control algorithm specifies the
desired air flow and the cascaded flow control algorithm measures
and controls the air flow to the desired air flow set point. The air
flow is independent of the supply air pressure. An air flow sensor is
required to measure the actual air flow.
1 – pressure dependent is implemented using the space
temperature to control the damper Position directly. The air flow is
dependent on the supply air pressure. The air flow sensor is not
used to control air flow.
Notes:
Series fan zone terminals require pressure independent airflow
control. This is necessary in order to avoid dumping the primary air
through the induction (return air) inlet.
If pressure dependent control is enabled, the Tool must set
nciAlarmInhibit in order to disable the alarm ID associated with the
alarm state on-board pressure sensor is open or shorted.
180 fpm Throttling range.
default value is 180 fpm
≤
0
Precision: 0
89
Description
≤
range 5000 fpm
31-00083—02