System information

VAV Device
This element represents a variable air volume device, which controls airflow into a space using fans, and heats or
cools the air using electric or water coils. Sensors monitor the supply and discharge air temperatures.
Figure 289: VAV Device
The VAV Device element has the following runtime characteristics:
• When the element is bound to three Metasys items (damper, flow, and flow setpoint), the two attached Advanced
Value Boxes display all of their functionality. For information about Advanced Value Box functionality, see
Advanced Value Box.
• The VAV Device element displays a discharge air sensor or supply air sensor if these sensors are configured to
display.
The Damper Output binding has the following runtime characteristics:
• When the value of the Damper Output binding within the VAV Damper Primary binding group is:
- Closed - the damper is closed.
- 25% Open - the damper is one quarter open.
- 50% Open - the damper is half open.
- 75% Open - the damper is three quarters open.
- 100% Open - the damper is completely open.
The Water Coil binding has the following runtime characteristics:
• When the value of the Coil Output binding within the Water Coil binding group is:
- Closed - none of the coils are animated.
- 20% Open - one quarter of the coils are animated.
- 50% Open - half of the coils are animated.
- 70% Open - three quarters of the coils are animated.
- 100% Open - all coils are animated.
• The Coil Mode binding within the Water Coil group supports two animations: heat and cool. If the coil is used for
heating, the animated pipes inside the coil appear bright red, while the non-animated pipes appear dark red. If
the coil is used for cooling, the animated pipes inside the coil appear bright blue, while the non-animated pipes
appear dark blue.
The Supply Fan Status binding has the following runtime characteristics:
• When the value of the Supply Fan Status binding is:
- Off - the fan blades do not spin.
- On - the fan blades spin.
• The color of the fan blades reflects the current value of the Supply Fan Status item (for example, stopped or
running) as defined by the Fan Status section within Metasys system preferences. By default, green indicates
a running fan and red a stopped fan. However, if the status of the item is non-normal (for example, offline), the
color of the fan blades reflects the status of the item as defined by the Status Colors section within Metasys
system preferences. In other words, the status color for a not normal item supersedes the fan status color.
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