Commissioning Screen - Trane Symbio 210 Installation, Operation And Maintenance Manual

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Commissioning Screen

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BAS-SVX091A-EN
Discharge Air Temperature Reset Maximum: This is the maximum discharge air temperature
allowed when local heat (either modulating hot water or SCR electric) is on. Once the controller has
increased airflow to Airflow Setpoint Reset Maximum Local Heat, reheat capacity is allowed to
increase further, raising the discharge air temperature, but not above this maximum limit.
Discharge Air Temperature Design Setpoint: When local heat (either modulating hot water or
SCR electric) is initially activated, the air valve will maintain position/flow at Airflow Setpoint Reset
Minimum Local Heat and begin increasing reheat capacity. Once reheat capacity has increased to
the point that the discharge air temperature has reached this design setpoint, the controller will
begin to modulate airflow between Airflow Setpoint Reset Minimum Local Heat and Airflow Setpoint
Reset Maximum Local Heat, while reheat capacity is modulated to maintain the discharge air
temperature at this design setpoint.
Note: When the parameters on this tab are used, leave Airflow Setpoint Minimum Local Heat (found
in the Flow Setpoints Setup section) at the factory configured value. If there is a fault with the
discharge air temperature sensor, the controller reverts to Airflow Setpoint Minimum Local
Heat when local heat is on.
Zero Air and Water Valve Position (Start Button): The calibration sequence enables the controller
to calibrate the air valve position and the water valve position, as well as calibrate the flow sensor.
Auto-commissioning (Start Button): The controller auto-commissioning test sequence validates
both the proper operation of all outputs and the capability to measure all inputs. The purpose of the
test sequence is to minimize the labor required to commission the unit in the field.
The auto-commissioning test does not require a flow sensor or a discharge or supply air
temperature sensor. If there is no flow sensor, the controller runs in pressure-dependent mode.
A temperature sensor in the discharge air stream is required for testing of the fan and the reheat.
The fan and the reheat are not tested if the discharge air temperature sensor is not present. The
fan is not tested if there is no fan. Local reheat is tested, if it is present. Remote reheat is not
tested.
The sequence starts on receipt of an auto-commission command from the Tracer TU service
tool start button or the Tracer SC+. The auto-commission command contains a time/date stamp.
No 3rd party tool can start the auto-commissioning sequence. The user then chooses to
commission all VAV boxes or one VAV box. The results of auto-commissioning are contained in
a structured network variable called reported auto commissioning report. The controller places
the time/date stamp in the report. The structure is loaded with the default values for all of the
fields when the auto commissioning test sequence starts. The fields are updated with the results
as the sequence progresses. The data is held until the next auto-commissioning test.
If an auto-commission command is received in the middle of an auto-commissioning cycle, the
auto-commissioning sequence restarts. If an auto-commission command is received during
calibration, calibration aborts and restarts after auto-commissioning finishes. If an abort auto-
commission command is received during the calibration portion of the primary air valve test, it is
honored after the air valve calibration finishes.
Calibrate Air Valve (Start Button): Displays the Calibrate Air Valve dialog box. Use this air
balancing tool to perform a basic two-point air balance for the Symbio 500 controller. See the Tracer
TU Help for Programmable Controllers ("Configuring and Commissioning Equipment" > "VAV Boxes"
> "Using the Air Balancing Tool") for the correct procedure.
Note: A full discussion of air balancing is beyond the scope of this document. Refer to the Air
Systems for Tracer SC+ Applications Guide (BAS-APG007).
Airflow Override: Displays the Airflow Override dialog box. The user can override the air damper to
open for a limited duration as part of a system water balancing operation. When the timed duration
expires, the water valve is released back to its normal setting.
Water Valve Override: Displays the Water Valve Override dialog box. The user can override the
water valve to open for a limited duration as part of a system water balancing operation. When the
timed duration expires, the water valve is released back to its normal setting.
Controller Points and Parameters
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