Installation & Operation Manual (2019, 2020)
42 43
Figure 83
FRR031
TRIM MOULDING
SILL PLATE GUIDE CHANNEL
NOTE: SUPPORT BRACKET MAY BE OMITTED 
FROM THRU-THE-WALL INSTALLATIONS IF 
THE CABINET IS SECURED AS FOLLOWS: 
DRILL TWO HOLES IN EACH SIDE AND 
INSTALL 4 FASTENERS (2 EACH SIDE).
USE #12 x 2″ SCREWS, (ITEM 4).
TOGGLE BOLTS OR EXPANSION BOLTS 
MAY BE REQUIRED.
CAULK ALL SIDES WEATHER TIGHT
INSIDE AND OUTSIDE
SCREW #12 x 2″ 
LONG (USE 3)
(ITEM 4)
3″
4″
INSIDE WALL SURFACE
3
/8″ SLOPE DOWN
CABINET
SUPPORT BRACKETS
SCREW #12 x 2″ LONG
DRILL 
5
/32″ DIA. PILOT HOLES.
STEP 6.   Slide the cabinet into the hole far enough to allow the guide-
channel of the sill plate to contact the inside wall surface 
(Figure 83).
STEP 7.   Drill three (3) 
5
/32″ diameter pilot holes (use the sill plate holes 
as a guide) into the frame and install three (3) #12 x 2″ long 
screws (Item 4) (Figure 83).
NOTE:   Alternate fasteners are required when securing the sill plate 
or support brackets to material other than wood (cinder block, 
brick, masonry, or concrete). These items can be purchased at 
your local hardware store.
NOTE:  DO NOT LEVEL the cabinet from front to back. Make sure 
there is approximately 
3
/8″ to 
1
/2″ slope (
1
/8 to 
1
/4 bubble on 
the level) toward the outside of the house.
STEP 8.  Drill two (2) 
5
/32″ diameter pilot holes in each cabinet side at the 
locations shown (Figure 83) and install four (4) #12 x 2″ screws 
(Item 4). Provided that Step 5 (hole construction) provides 
a sturdy mount with solid vertical studs, support brackets may 
not be required. The installation must support the weight of the 
unit plus an additional weight of 400 pounds on the rear of the 
cabinet. If support brackets (Item 1) are available, they can be 
installed as shown in Figure 83.
STEP 9.  Complete the installation by following Steps 12 through 15 of 
“STANDARD WINDOW INSTALLATION” instructions, starting 
on Page 35.
EXPANSION ANCHOR BOLT
MOLLY OR TOGGLE BOLT
Thru-the-Wall Installation continued










