27” Sleeve Exterior Grilles
CORRECT Vertical Louvers
WSC Sleeve
Standard Grille - Ships with sleeve
IMPORTANT:
Operating the air conditioner with incorrect rear grille or without Baffle Adapter Kit (on 19 3/4” deep sleeve) will recirculate discharge air and cause compressor overload to trip.
WSC Sleeve
Optional Architectural Grille- AG
INCORRECT Horizontal Louvers
Installation Accessories (27” sleeve models only)
DK / Drain Kit
Installed at the back of the unit and allows for attachment to permanent condensate disposal system, if disposal is necessary or desired.
SB / Sub Base
Used as a base for the unit when it is desired to place the cord and receptacle within the installation, or simply as a base for the unit when mounted low in the wall.
IDK / Internal Drain Kit
New construction applications where a condensate drain system has been built into the wall interior.
BAK / Baffle Adapter Kit
Necessary when installing in a sleeve deeper than 16 3/4" deep, such as Fedders B sleeve (19 3/4" deep).
Fedders B 
19 3/4”
26” Sleeve Exterior Grilles
USC Sleeve | Sleeve shown with |
Standard Grille | Replacement Grille |
Expanded aluminum grille designed for use with USC sleeve.
REPLACEMENT GRILLE – Ships with US/UE chassisIMPORTANT:
When installing into an existing sleeve, consult Installation Section of your Installation/Operation Manual to determine whether or not the grille needs to be replaced and/or a baffle adapter should be used.
Sleeve/Chassis Dimensions
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| Model | Height | Width | Depth | Front | Into Room | Outside | Height | Width | Max. Depth |
WALLMASTER |
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WSC Sleeve | 16 3/4" | 27" | 16 3/4" | 23" | 7 1/2" | 9/16" | 17 1/4" | 27 1/4" | 15 5/16" |
Chassis | 15 3/4" | 26 1/2" | 21" | 22” | – | – | – | – | – |
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USC Sleeve | 15 1/2" | 25 7/8" | 16 3/4" | 20 1/2" | – | 1/2" | 15 3/4" | 26 1/8" | 16 1/4" |
IMPORTANT:
US= 3 3/8”, UE= 2 7/8”
US Chassis | 14 3/8" | 24" | 20 1/8" | 3 3/4" | – | – |
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UE Chassis | 14 3/8" | 24 5/8" | 19 5/8" | 3 1/2" | – | – | – | – | |
US chassis w/front fully installed into USC sleeve extends into room 3 3/8”. UE chassis w/front fully installed into USC sleeve extends into room 2 7/8”.
IMPORTANT: Sleeves are sold and shipped separately to accommodate new construction and replacement requirements
