1199088-UAI-D-1018
Johnson Controls Unitary Products
3
9.
Install one or both “L” brackets (provided with kit). Verify
thickness of filter being used. For normal Installation, use a
1” or 2” filter.
a.
For 1” filter, use first “L” bracket to support filter from
behind and second “L” bracket to support filter from
front.
b.
For 2” filter only, use one “L” bracket to support filter
from behind. Secure each end of “L” bracket to filter
frame (bottom) with mount screw. See Figure 8.
10. Use a standard off-the-shelf air filter for both large and
small filter frame sizes. Check filter for correct airflow rating
from Table 3.
11. Install filter access panel on unit. See Figures 2 and 9.
12. Return to the unit Installation Manual to finish accomplish-
ing unit installation procedures.
SECONDARY INSTALLATION
(When Downflow Economizer Installed)
Install filter and frame kit as follows:
1.
Verify that power to unit is off.
2.
Remove the horizontal duct cover from the back of the unit.
See Figures 2 and 9.
FIGURE 7:
Anchor Screws Secure Filter Frame to Compressor
Block off Panel
FIGURE 8:
“L” Bracket Installed
A0387-001
FILTER FRAME
(BOTTOM)
FILTER FRAME
(RIGHT SIDE RAIL)
1/2” LONG #10 SCREW
(SELF-TAPPING)
A0388-001
FILTER FRAME
(BOTTOM)
“L” BRACKET
MOUNT
SCREW
MOUNT
SCREW
FIGURE 9:
Filter Assembly Inside of Unit
TABLE 3:
Filter Usage
Unit Type
Unit
Tonnage
Filter Opening
Size
Minimum Air Velocity
Rating Feet/Minute
AC/HP
2 Ton
20 X 20
288
AC/HP
2.5 Ton
20 X 20
360
AC
3 Ton
20 X 20
432
HP
3 Ton
20 X 30
288
AC
3.5 Ton
20 X 20
504
HP
3.5 Ton
20 X 30
336
AC/HP
4 Ton
20 X 30
384
AC/HP
5 Ton
20 X 30
480
NOTICE
If a downflow economizer is being Installed in the unit, the
downflow economizer blocks access through the filter
access opening which normally allows filter change out for
the unit. The Normal Installation procedure in the first part
of this document can not be accomplished because the
downflow economizer must be installed before the filter
frame is installed. The Secondary Installation procedure is
accomplished by installing the filter frame through the hori-
zontal duct opening on the back of the unit.
A0366-001
HORIZONTAL
DUCT
OPENING
BACK OF UNIT
FILTER FRAME
(Inside of unit)
SIDE
OF UNIT
FRONT
OF UNIT
(Not shown
in this view)
FILTER
RETAINER
BRACKET
