Installation - Williams 4505622A Owner's Manual

Installing Your Furnace

Installation

1. Lay an outline of the furnace in the selected location, and
draw diagonally from each corner of the outline as shown in
Figure 6.
2. Drive a nail through the flooring at the intersection of the
diagonal lines.
3. Use the nail location as a reference, and examine the area
beneath the floor to assure there are no obstructions that will
prevent the installation of the furnace and that adequate
clearance between the furnace and the ground can be
obtained. If the selected location of the furnace is appropriate,
proceed to step 4.
4. Bore two 1" diameter holes in opposite corners of the furnace
outline. Be sure the holes do not extend beyond the furnace
outline.
5. Insert a compass or sabre saw into one of the 1" diameter
holes and cut along the furnace outline. Cut as straight and
accurately as possible to avoid any possibility the hole will not
fit the furnace or will extend beyond the outer perimeter of the
furnace grille after it is installed.
6. If it is necessary to cut floor joists to install the furnace, install
headers across the cut ends of the floor joists, and double the
floor joists along each side of the furnace cut-out as shown in
Page 11, Figure 7. If you must cut a girder or beam, construct
an adequate foundation and pillar to support each end of the
cut member.
7. If necessary, dig a pit and install a pan in the ground beneath
the furnace to provide the required clearances.
8. Remove the grille from the furnace.
9. Lower the furnace into the floor opening until the flanges on
the furnace cabinet rest on the floor.
10. Fasten the 'furnace in place by driving nails through the sides
of the furnace cabinet and into the floor joists.
11. Refer to Page 12, Figure 10 for the installation of draft hood
collars and the draft hood.
12. Install the (2) draft hood collars and gaskets by positioning the
collars into the (2) rectangular openings on the furnace,
making sure gaskets are facing toward the furnace.
13. Slip the (2) draft hood collars over the combustion chamber
outlets and engage the collars into the furnace until the
gaskets press tight against the furnace. Secure the collars to
the furnace with (12) screws previously removed.
14. Check to be sure that the draft hood collars fit snugly over the
combustion chamber outlets.
15. Install the draft hood by positioning the draft hood with the
open side down. Slip it over the draft hood collars making sure
the draft hood collars engage into the draft hood. Secure the
draft hood to the furnace with (4) screws previously removed.
16. Install the pipe necessary to connect the furnace to the gas
vent or chimney. Be sure to comply with all the requirements
for proper venting as stated in the "Venting and Chimney
Requirements" section of this manual.
10
17. Connect the furnace to the gas supply line as specified by the
"Gas Supply and Piping Requirements" section of this manual
(see Page 9, Figure 5).
18. Install the thermostat and connect the thermostat lead wires to
the limit switch and control as shown in Page 11, Figure 8.
FIGURE 6 Marking for Furnace Installation