Trane VAV VV550 LonTalk, Руководство по установке и эксплуатации

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VAV VV550 Controller Device Home Tabs: Instructions
Setup Tab
In Rover, the Setup Tab can be changed by selecting the Configure button. Following are
descriptions of each line on the Setup tab for the Device Setup.
VAV setup
Nominal Flow: Nominal flow is the total airflow capacity of the VAV box. Nominal Flow becomes
an active field when "Generic" is selected in Box Setup under the Unit Tab. Select the CFM nominal
flow for the unit. This is normally used when mounting the VV551 controller on someone else's VAV
unit
Note: See CNT-PRC003-EN if retrofitting a VV550/1 controller onto someone else's VAV unit.
Unit Flow Gain: The flow gain is used to calibrate the value reported by the flow sensor so that
the reported airflow matches the actual airflow. The flow gain is determined during the air
balancing of system. A testing, adjusting, and balancing professional will use the Rover Air and
Water Balancing tool to calculate this value and balance the VAV box. Normally, you should not
need to change this value here.
Tracking Offset: This field is available only if the controller is using flow tracking control. Type
a tracking offset to create a positive or negative pressure in the controlled zone. The tracking offset
is added to the airflow setpoint, so a positive offset decreases the pressure in the zone, and a
negative offset increases the pressure in the zone. (A positive number decreases the pressure
because the flow tracking VAV box is removing air from the space.
Note: See Operation section for an explanation of flow tracking control.
If the flow sensor fails, the controller will control to the minimum flow setpoint if the flow tracking
offset is negative and to the maximum flow setpoint if the tracking offset is positive.
Flow Offset: The flow offset is used to calibrate the value reported by the flow sensor so that the
reported flow matches the actual flow. The flow offset is determined during the air balancing
process. A testing, adjusting, and balancing professional will use the Rover Air and Water
Figure 44. Setup tab