Empire Heating Systems 3588-4 Installer And Serviceman's Manual page 7

4. Position the furnace so that the long sides are running the same
way as the floor joists (see 10), so that you will only have to
cut one joist. Be sure you install headers or cross supports
between each joist next to the one you cut (see 10). If the fur-
nace is narrow, you will have to also run an additional furnace
support between the two headers or cross supports you add
(see 10). There is a "Cutout Template" in the box the furnace
came in. It is the exact size for the opening needed in the floor
to fit the furnace. Use the cardboard template when preparing
and cutting the floor but always double check the dimensions
(see Table on next page). HINT: When you cut the joist, don't
forget to allow for the thickness of the two headers you will
install. Each one is about 1 1/2 inches thick. Since you will
be using two of them, that is a total of 3 inches.
5. If the house has a sealed or unventilated foundation, an
opening will have to be provided to admit air for burning at
the burner. The opening or vent MUST BE at least 1 square
inch per thousand BTUs. (The owner will also have to provide
a gate or door as an entrance to the crawl space so that the
serviceman can get to the bottom of the furnace for making
any necessary adjustments.) The furnace must have at least
6 inches clearance at the bottom.
6. If you have a completely open foundation strong winds will
cause your burner to flutter, make noise and cause the pilot
to go out. The best setting for a furnace is an enclosed but
ventilated foundation with an access door or gate.
Page 7
CUttING tHE FLOOR
HERE's HOW tO dO It
1. Place the template on the floor where you want the furnace and
draw an outline on the floor around the template. Recheck the
dimensions carefully.
2. Remove the template and drive a long nail through the floor
within the outline. If you hit a joist instead of going through,
try another spot within the outline.
3. Go below and find where the nail came through, so you will
know where the furnace will be located downstairs.
4. If the furnace location does not have to be exact, plan on plac-
ing the furnace against one of the joists. see Figure 10.
5. Cut out some of the floor along the joist so that you can look
through and see where you are. Use that joist and cutout as a
guide by laying the template along it, and draw a new outline.
6. Cut away the flooring around the outline but do not cut the joist
yet. Remember that the joist has to be cut back farther than
the flooring to make room for the headers. see Figure 10.
7. Place jacks or supports under the joist that is to be cut. This
will prevent the joist sagging and pinching the saw when you
are cutting.
8. Move any heavy furniture, or appliance (refrigerator) away from
the area where the joist is being cut. If not properly supported,
the floor could sag and furniture could fall on you.
9. Cut through the joist at each end and remove. Put the header
in place and jack it up against the floor. see Figure 10. Make
sure it is butted up against the end of the joist you have just
cut. Use the template to make sure the header is square to the
two joists on each side of it.
10. Drive three large nails through each of the joists and into each
end of the header. Now drive three large nails through the
header and into the end of the joist just cut. Install the other
header in the same way. see Figure 10.
11. Use the template to position the additional furnace support and
then nail the support in place by driving three nails into each
end of it, through the headers. see Figure 10.
12. Remove the jacks and supports.
13. Make sure the furnace is facing the way you want it with draft
diverter closet to the vent pipe chimney. Then, with someone
helping you, slowly lower it into the opening.
14. Drive two nails through each side and at least one nail through
each end of the furnace from the inside into each joist and
header that surrounds it.
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