Trane BAYSQRD001 Assembly instructions

18-HE79D1-1E-EN
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES.
IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service information
pack upon completion of work.
Square to Round Adaptor Kit
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with
the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the
purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.
Note: The manufacturer recommends installing only approved matched indoor and outdoor systems. All of the manufacture’s split
systems are AHRI rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and out-
door split systems are maximum efficiency, optimum performance and the best overall system reliability.
Installer’s Guide
Models
BAYSQRD001
BAYSQRD002
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of
heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and train-
ing. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious in-
jury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels
that are attached to the equipment.
WARNING

2 18-HE79D1-1E-EN
Installer's Guide
Safety Section
HAZARDOUS VOLTAGE!
Failure to follow this Warning could result in property
damage, severe personal injury, or death.
Disconnect all electric power, including remote discon-
nects before servicing. Follow proper lockout/tagout
procedures to ensure the power cannot be inadver-
tently energized.
General Data
Kit Contents
Items Quantity
Supply Adaptor 1
Return Adaptor 1
Gasketing A/R
Inspection
Check carefully for any shipping damage. This must be
reported to and claims made against the transportation
company immediately. Any missing parts should be
reported to your supplier at once and replaced with
authorized parts only.
Install Adaptor Kit
1. Remove the panels covering both the horizontal
supply and return openings on the unit.
2. Attach gasketing to the flanges on both adaptors.
3. Place one of the adaptors over the supply opening.
Align the adaptor so that the left side edge of the
adaptor flange is flush to the side of the mitred
corner post on the cabinet, and the bottom flange of
the adaptor is flush with the bottom of the cabinet.
Secure with sheet metal screws. See Figure 1.
Figure 1. Install Supply Adaptor

18-HE79D1-1E-EN 3
Installer's Guide
4. For use with small 12 cabinet *****016-36
Models - Place the other adaptor over the return
opening of the cabinet. Align the adaptor so that
there is 1” between the flanges of the adaptors and
that the bottom flange is with the bottom of the
cabinet. Secure with sheet metal screws.
See Figure 2.
For use with medium 12 cabinet *****042-60
Models - Follow instructions above but leave a
4-1/2” gap. See Figure 2.
Figure 2. Install and Align Return Adaptor
A INSTALL NOTE
BAYSQRD001 1” AS ABOVE
BAYSQRD002 4- 1/2” LONGER 20.92” SIDE TOP/BOTTOM
5. For use with **CA4024-60 Models - Place
adaptors over the supply and return openings and
align with dimples. Secure with sheet metal screws.
The 16” or the 18” flexduct can be used.
See Figures 3 and 4.
Note: The steps 3 and 4 do not apply to **CA4024-
60 models.
Note: * indicates alpha character.
Figure 3. Install Supply Adaptor (**CA4024-60)
Note: Notice orientation of the Adaptor.
Figure 4. Install and Align Return Adaptor
(**CA4024-60)
INSTALL NOTE
BAYSQRD001 AS ABOVE
BAYSQRD002 SHORTER 20.35” SIDE TOP/BOTTOM

About Trane and American Standard Heating and Air Conditioning
Trane and American Standard create comfortable, energy efficient indoor environments for residential applications.
For more information, please visit www.trane.com or www.americanstandardair.com
The manufacturer has a policy of continuous data improvement and it reserves the right to change design and specifications without notice. We are
committed to using environmentally conscious print practices.
© 2023
18-HE79D1-1E-EN 14 Jul 2023
Supersedes 18-HE79D1-1D-EN (June 2020)
20.35
20.92
18.85
19.42
TOP/BOTTOM
TOP/BOTTOM
SIDE SIDE
Note: Flexduct size is 18”
*Depth is 6”
Note: Rotate 90°for
**CA4024-60 models
6. Connect field supplied flex duct to the adaptors and secure with field supplied clamps. See Figure 5 for
dimensional drawings for flexduct sizing.
Figure 5. Dimensional Drawing
BAYSQRD001 Dimensions
(For use on *****018-036 Units)
14.42
18.85
16.42
20.85
Note: Flexduct size is 16”
*Depth is 6”
BAYSQRD002 Dimensions
(For use on *****042-060 Units)