Trane DX1B080A9421A Return AIR Filters, Typical Upflow Return AIR Filter INSTALLA- Tions, Front

Installer’s Guide

REMOVE FILTER FROM UPFLOW		q
FURNACE WHEN RETURN DUCT IS
ATTACHED TO FURNACE TOP SIDE
(HORIZONTAL LEFT OR RIGHT
APPLICATIONS) AS SHOWN.	FILTER

Close coupled (less than 36") return (filter directly beneath bottom side return) not recommended due to

w *

LOCATING

NOTCHES *

PROVIDED

FOR SIDE

RETURN

CUTOUT

*

*

*SEE OUTLINE DRAWING

CUT OUT

FOR

SIDE

FILTER

FRONT

of Furnace

noise considerations. If used, securely attach 1/2" mesh metal hardware cloth protective screen to the inside bottom of filter grill.

7.Connect the duct work to the furnace. See Outline Drawing (pages 4&5) for supply and return duct size and location. Flexible duct connectors are recom- mended to connect both supply and return air ducts to the furnace.

If only the front of the furnace is accessible, it is recommended that both supply and return air plenums are removable.

8.When replacing a furnace, old duct work should be cleaned out. Thin cloths should be placed over the registers and the furnace fan should be run for 10 minutes. Don’t forget to remove the cloths before you start the furnace.

RETURN AIR FILTERS

(Filter and filter rack are not supplied with unit)

TYPICAL UPFLOW RETURN AIR FILTER INSTALLA- TIONS

These furnaces require high velocity type air filters. The optional filters may be located within the furnace blower compartment for UPFLOW furnaces in either a BOTTOM or SIDE (left side or right side) return air inlet. Some optional filters may need to be trimmed for side or bottom filter use.

NOTE:

On upflow 5 or 6 ton airflow models where the airflow requirement exceeds 1800 CFM - Models will require return air openings and filters on: (1) both sides; or (2) one side and the bottom; or (3) just the bottom.

The furnace and the blower filter rack installation can be seen in Figure 13.

The optional furnace filter in the bottom or side con- figuration can be removed by simply turning the two latches on the blower door and tilting the door forward.

The filter rails are spring loaded for automatic adjust- ment to allow standard size, locally obtainable replace- ment filters. The filter rack itself slides to adjust to the required width needed for bottom or side return.

MINIMUM CLEARANCE FROM COMBUSTIBLE MATERIALS FOR

UPFLOW/HORIZONTAL AND DOWNFLOW/ HORIZONTAL FURNACES

	UNIT LOCATION
FURNACE SURFACE	VERTICAL	HORIZONTAL	HORIZONTAL
	CLOSET	CLOSET	ALCOVE / ATTIC
SIDES	0"	1"	0"
BACK	0"	3"	6"
TOP	1"	1"	1"
FRONT	3"	3"	18"
VENT	0"	0"	0"

NOTE: CLEARANCE REQUIRED AT TOP OF PLENUM IS 1"

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