STEP 1. Cut hole within stud space behind heater in the back wall 8-1/4" high by 12-5/8" wide. The lower edge of the
hole to be 45-3/4" above the floor plate or 47" from the floor (with standard 2"x4" floor base) as shown in
Figure 13-A (below).
STEP 2. Install plaster ground frame for rear register in hole and nail frame to stud as shown in Figure 13-B (below).
STEP 3. REAR REGISTER INSTALLATION: Cut and remove embossed plates in inner and outer casing. Follow
instructions for installation of regular furnace.
STEP 4. After furnace is installed, attach rear register grille as shown in Figures 14-B & 14-C (on page 19) by insertion
over plaster ground and attach with sheet metal screws, provided.
STEP 5. Damper as shown in Figure 14-C (on page 19) can be adjusted from full open for maximum heat to
fully closed.
FIG. 13-A
12 ⅝"
HOLE
FOR BACK
REGISTER
PLASTER
STUD
PLATE
FIG. 13-C
24
1017754-A
40542-A REAR REGISTER KIT (Optional Accessory)
Installation Instructions for Gravity Vented Wall Furnaces
ROUGH-IN DIMENSIONS FOR
REAR REGISTER
14-3/8"
PLASTER
8 ¼"
OPENING
7/8" FROM
EACH STUD
45-3/4"
STUD
PLASTER
40542-A REAR REGISTER KIT - W25/35 Series (Used on Single Wall Models Only)
27
23
22
25
26
FIG. 13-B
STUD
PLASTER
PLATE
Part Description
Damper
Damper Spring
Frame Assembly
Register Chain
Bell, Pull
Register Assembly
Installation Instructions
Page 18
Back to Index
PLACING FRAME FOR
REAR REGISTER
PLASTER
NAIL
TO STUD
STUD
PLASTER
Ref. No.
Part No.
22
40375
23
40377
24
40365
25
40379
26
85003
27
40355
- -
84504