Duct Connections - Lennox T?CLASS TAA SERIES Installation Instructions Manual

Duct Connections

SIDE RETURN AIR COVER PLATE
RELOCATION
UNIT IS SHIPPED FOR INSTALLATION IN AN UPFLOW OR HORIZONTAL
APPLICATION WITH BOTTOM (OR END) RETURN AIR. IF UNIT WILL BE USED IN
AN UPFLOW APPLICATION WITH SIDE RETURN AIR, REMOVE SCREWS THAT
SECURE SIDE COVER PLATE ON SIDE RETURN AIR OPENING. USE EXISTING
SCREWS TO RE−SECURE COVER PLATE OVER BOTTOM OPENING.
072−090−120−150 MODELS
SIDE RETURN AIR COVER PLATE (SHIPPED
FROM FACTORY INSTALLED)
NOTE SIDE RETURN AIR COVER PLATE CAN BE
RELOCATED TO BOTTOM RETURN AIR LOCATION.
IF A RETURN AIR PLENUM IS NOT USED, INSTALLATION CODES MAY LIMIT
INSTALLATION TO SINGLE−STORY STRUCTURES ONLY. DO NOT INSTALL THE
SUPPLY AIR PLENUM WITHIN 18 INCHES (457 MM) OF THE BLOWER ACCESS
PANEL.
NOTE Use flexible duct to eliminate vibration.
506149−01 04/11
SUPPLY AND RETURN AIR FLANGES ARE
PROVIDED AND ARE STORED INSIDE UNIT FOR
SHIPPING. SEE TABLE 2 FOR FLANGE
LENGTHS.
SIDE VIEW
Figure 4. Cover Plate Relocation and Installation of Flanges
INSTALLATION OF FLANGES
ALIGN PROVIDED FLANGES WITH PRE−DRILLED HOLES IN
BOTH RETURN AND SUPPLY AIR LOCATIONS AND SECURE
WITH FIELD−PROVIDED SHEET METAL SCREWS (#10−16 X 5/8").
NOTE
180−240 MODELS
ENCOMPASS BOTH OPENINGS.
Page 10
TOP VIEW
SUPPLY AIR
ON DUAL−BLOWER UNITS, FLANGES
SIDE VIEW