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Ducted Installation Comments
New Installations
The GE Zoneline 2500 and 3500 series are approved for
ducted installation using the GE Duct Adapter model
RAK6052 and the GE Duct Extension RAK601. A field
fabricated duct extension with the same interior
measurements as the RAK601 may be used with the
RAK6052 duct adapter. GE does not recommend ducting in
more than one direction.
The use of a duct adapter other than the RAK6052 is not
approved by GE and may cause problems such as inadequate
airflow to the secondary room or the unit shutting off on
one of the overload devices.
Failure to allow for adequate air return from the secondary
room is often the cause of less than satisfactory performance
of a ducted installation.
Replacement Installations
GE offers duct adapters to allow for easy replacements of
previous design chassis in ducted installations where a GE
duct adapter was used in the original installation. A duct
adapter is available that will align with the duct extension
when GE built components were used in the original
installation.
The duct extension used from the early 1960’s until late
1987 was 8-3/8" high by 6-1/2" wide. If the chassis to be
replaced is the flat-top discharge (design until late 1987) the
duct adapter model RAK7012 will align with the existing
duct extension. This means the duct extension will not have
to be changed. However, to keep the cost of the replacement
to a minimum there are components that will need to be
taken off the existing installation and used on the RAK7012
duct adapter. The wall case mounting brackets, screws,
discharge grille, damper, and end cap will need to be
retained.
If the chassis is a slope-front discharge and the duct
dimensions are 8-3/8" high by 6-1/2" wide then the chassis
has already been replaced and the purchase of a new duct
adapter is not required. The only piece that needs to be
replaced in this installation is the transition piece, model
RAK7022, which fits between the chassis and the duct
adapter.
If the chassis being replaced has a model number that
begins with AZ22E or AZ32H the new 2500 or 3500 series
unit can be installed using the same components that were
used for the 2200 or 3200 series unit.
If the chassis is a slope-front discharge and the duct
dimensions are 7-3/32" high by 6-1/2" wide only the
RAK7022 transition piece is required to install a 2500 or
3500 series unit in the ducted installation.
There were a number of Zoneline units installed in ducted
installations that did not use a GE duct adapter. The easiest
way to determine if the existing duct adapter is a GE duct
adapter is to compare the duct adapter dimensions to the
dimensions above. If the dimensions are different than the
dimensions above or it the duct adapter is not made of sheet
metal, it is not a GE duct adapter. In such installations GE
recommends the removal of the old duct adapter and duct
extension and the installation of a RAK6052 duct adapter
and a RAK601 duct extension. Zoneline units installed in
installations not using GE duct adapters and an extension
with the same cross-section dimensions as the duct adapter
may not be covered by the warranty.
1719 Data Manual 2001 2/14/02 3:12 PM Page 58
