Balancing mode places the VAV system in a state where the balancing contractor determines if the system can deliver rated flow to all of the VAV boxes at full system flow. To determine this, the balancing mode places the RTU and the VAV Boxes in the proper operating modes. You can place the system into balancing mode from the Commissioning section of the zone coordinator on the SBH.
When the system is placed in balancer mode, the following occurs:
- The VAV boxes command to Cooling Max Flow.
- After a two minute time delay, the RTU runs the fan at full speed.
- The heating and cooling of the RTU turns off.
- The economizer closes.
When the system exits balancer mode, the following occurs:
- The RTU returns to static pressure control mode.
- After a two minute time delay, the VAV boxes are released to normal control.
- The heating and cooling of the RTU is enabled.
- The economizer returns to its minimum position.
Note: The system automatically returns to normal operation if balancing mode is
left to operate for eight hours. This automatic expiration safeguards the system from
constantly running with dampers fully open if the user forgets to disable balancing
mode.