Ducted Installations
2500 and 3500 Series Zoneline units may be used in ducted installations.
With a ducted installation it is possible to condition the air in two areas that have a common wall separating them. A special adapter mounts on the wall case and a transition piece directs the air from the unit into the adapter. Instructions for mounting the adapter to the wall case are included with the duct adapter. The adapter contains a grille that allows air from the unit to be discharged into the primary room and the adapter connects to a duct extension that allows the air to flow to the adjoining room. Ducting a unit may allow a single unit to be used rather than a separate unit in each room, providing a means of reducing initial equipment cost. The duct may extend a total of 15 feet (with a field fabricated insulated duct extension) in one direction, either to the right or to the left of the unit. A baffle in the adapter allows up to 50% of the discharge air to be delivered to the secondary room.
The installation of the wall case and
Refer to pages 38 and 39 for drawings of ducted installations.
Prior to the installation of the transition from the room cabinet to the adapter, it will be necessary to remove the discharge grille from the room cabinet. Instructions for this modification are included with the duct adapter.
New Ducted Installations
Components
Duct Adapter RAK6052 - The duct adapter is secured to each side of the wall case and requires the drilling of mounting holes
in the wall case during installation.
A template for the hole location is in the installation instructions. By securing the duct adapter to the
wall case, the chassis retains the
Duct Extension RAK601 - This kit contains a 44" long insulated duct, a register mounting collar, and an air supply register. It can be secured to the duct adapter at either end of the adapter. This duct may be cut at any dimension and used in two applications providing the sum of the two duct lengths necessary do not exceed the 44" length. Even in single applications the mounting flange must be cut off one end of the duct to accept the collar and supply register.
Mounting Collar and Supply Register RAK602 These components are included in the Duct Extension Kit RAK601. They
may be ordered separately for installations where two duct extensions are made from one RAK601.
Ducted Application
Considerations
When designing a ducted application some application considerations to be made include:
1.Do not exceed the 15 foot length maximum for the duct extension. Field supplied duct extension must be completely insulated with minimum of 1/2" insulation
2.The duct must be a straight run. Turns or bends in the duct extension create air pressure drops that the unit is not designed to overcome.
3.Minimum recommended clearance between the unit and the adjacent wall is 2".
4.Provisions for return air must be made to allow air circulation from secondary room. Doors in both secondary and primary rooms may be undercut or a return grille may be installed through a common wall.
5.When calculating the heat gain / heat loss take both areas into consideration.
Replacements of Existing Ducted Units
Since the design of the Zoneline chassis has changed over the years to provide better performance and appearance, some of the components used in ducted applications have changed. Select the proper components from the information below. The best procedure in determining the correct kit is to measure duct extension cross section.
Flat Top-Discharge Units
(Zoneline Units Built Prior to 1988)
Existing Duct Extension Cross Section Measurements:
Duct Adapter RAK7012 - This duct adapter will allow the replacement of a new chassis (2500 or 3500 Series unit) into an existing ducted application. This adapter will align properly with the duct extension and will eliminate the need to modify the wall opening. In order to minimize replacement costs, some of the components of the old duct adapter must be removed and used in the new installation. Consult the Installation Instructions of the RAK7012 before removing and discarding the old duct adapter. See additional notes page 58.
Slope-Front Discharge Units
(Models With AZC, AZR, AZW, or AZ21 or AZ31 Prefix)
Existing Duct Extension Cross Section Measurements:
Duct Transition RAK7022 - This duct transition will allow the replacement of a new
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