INSTALLATION
REMOVE OLD FILTER AND DISCARD
(Figure 11)
NOTE: This filter may be mounted in the furnace compartment.
CLEAN BLOWER COMPARTMENT
NOTE: The air fi lter cannot remove dirt from blower and ducts.
INSTALLATION
The following is a typical installation of the air fi lter on a “Highboy” furnace (Figure 7).
1.Place the air fi lter compartment on the fl oor. Stand it upright with the door facing you (Figure 2). If a horizontal installation is being planned, lay the compartment on its side, this will help you to visualize the relative location of all parts.
2.Remove the door (by grasping top and pulling door away from compartment) and set it aside. Remove 4” fi lter by grasping it at the top and bottom. Set in a safe location until the cabinet is installed.
3.Set the compartment next to the furnace (if possible) to match the opening in the compartment.
If the furnace opening cannot be enlarged, a transition fi tting should be used. (Figure 3).
The compartment can be attached directly (Figure 12), or a starting collar can fi rst be fi tted to the furnace inlet. A butt or slip joint can be used.
Securely attach the compartment to furnace inlet, using at least two of the mounting holes on each side of the compartment.
Frame
Duct
Mounting
Holes
Figure 11
Figure 12
4.Using butt joint, attach duct work (normally an elbow) to the upstream side of air fi lter compartment. (Note the use of the sheet metal turning vanes inside the elbow to improve air distribution.) (Figure 13)
Transition Fittings
If the air duct does not fi t the compartment opening, a transition
| Turning |
Air Flow | Vanes |
Figure 13
fitting should be used. Gradual transitions are preferred for greatest effi ciency. Not more than four inches per linear foot (approximately 20° angle) should be allowed (Figure 3).
5.Connect the vertical duct section to the elbow.Wedge a wood block between floor and elbow for support (Figure 14).
6.Seal all joints in the return air system downstream from the air fi lter with duct tape to prevent dust from entering the air stream. Tape is usually applied on the outside of ducts, but may also be applied on the inside, or both.
7.With the air fi lter compartment installed,
Vertical |
Section |
Wood Block |
Tape All
Joints
Figure 14
MAINTENANCE
For maximum effi ciency, your air fi lter should be inspected once a month and changed if dirt loading is heavy. When changing is required, the following procedure should be used.
1.Remove door from air fi lter compartment.
2.Remove 4” fi lter and discard.
3.Insert new 4” fi lter by sliding it into the compartment. (Note direction of air fl ow.)
4.Replace door.
!CAUTION
The fiber filter used in this cabinet for air cleaning must be replaced every 90 to 180 days. Your heating and cooling efficiency will decrease due to insufficient air flow when filter becomes dirty.
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