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Delivered VAV System
Overview
What is Delivered VAV?
Delivered VAV is a small tonnage VAV system made up of three Trane prod-
uct families. It is the combination of:
• Voyager Commercial 27 ½ to 50 ton VAV Packaged Rooftop Unit
• Up to 32 VariTrane VAV boxes with DDC Controls
• VariTrac Central Control Panel with Operator Display
Delivered VAV will only work with this combination of Trane products. It will
not support any other types of equipment.
The Voyager Commercial 27 ½ to 50 ton rooftop unit must be a VAV model
with factory installed inlet guide vanes or variable frequency drive, micro-
processor controls, and Trane Communications Interface.
Delivered VAV will support up to 32 VariTrane VAV boxes with the DDC
controls option. They may be single duct boxes or fan powered boxes, and
may have a factory installed local heat option if desired.
The heart of the system is the VariTrac Central Control Panel with Operator
Display. The CCP acts as the communications hub of the system. It is
responsible for coordinating the actions of the VAV rooftop and the actions
of the VAV boxes with each other to meet the comfort requirements of the
zones.
As in any other application, the Voyager Commercial VAV unit runs the
supply fan at full constant volume whenever it goes into the heating mode,
with all the VAV boxes commanded to maximum flow. For this reason the
unit heat is only used for the Morning Warm-up and Daytime Warm-up
modes available on the Voyager Commercial unit. In both of these modes
the VAV boxes are commanded to maximum flow. If individual zone heat-
ing is required during normal daytime operation, a local heat source must
be provided at the box.
What Delivered VAV is Not
Delivered VAV is not changeover-bypass VAV. It is a true pressure indepen-
dent VAV system. The fact that we utilize the VariTrac Central Control Panel
as the heart of the system does not make it a VariTrac system. There is no
bypass damper in this system.
Additionally, Delivered VAV will only work with the combination of the
Voyager Commercial VAV unit, VariTrane VAV boxes with DDC controls, and
the VariTrac CCP with Operator Display. It will not support any other types
of equipment.
