Installation Guide

13
LocatingtheFurnace
• Thedimensionsoftheroomoralcovemustbeableto
accommodate the overall size of the furnace and required
clearances to combustible materials listed in Figure 1
(page 5). Access for positioning and servicing must also
be considered when locating the unit. To determine
the required clearances needed for installation, refer
to Figure 18 (page 26) for overall dimensions.
• Thefurnacemustbeinstalledonasolidsurfaceandmust
be level front-to-back and side-to-side at installation. The
surface that the furnace is mounted on must provide
sound physical support of the unit. Secure the furnace
to the floor.
• Thefurnaceshouldbeinstalledasclosetothecenterof
the air distribution system as possible and attached to
a properly installed duct system. Donotusetheback
ofthefurnaceforreturnair.See pages 11 - 12 for
circulating requirements.
• The furnace must be installed so that all electrical
components are protected from water.
• TheplenumattachedtotheA/Ccoilboxandductwork
within 3 ft. of the furnace must be installed so that
surfaces are at least 1” from combustible construction.
• Wheninstalledinaresidentialgarage,thefurnacemust
be positioned so the burners and the source of the
ignition are located no less than 18 inches above the
floor and protected from physical damage by vehicles.
• The furnace must be installed upstream from a
refrigeration system.
• The furnace requires special venting materials and
installation procedures. See pages 9 & 10 for venting
guidelines and specifications.
UpowFurnaces
wARNING:
Thefurnacemustnotbeinstalleddirectlyon
carpeting,tile,oranycombustiblematerialother
thanwoodooring.Failuretocomplymayresult
inre,propertydamageorpersonalinjury.
*SA series gas furnaces are shipped with the bottom panel
installed as shown in Figure 18 (page 26). If the furnace
is installed with side return air, the bottom panel must not
be removed. If the furnace is installed with bottom return
air, the bottom panel must be removed. See Bottom Panel
Removal on page 15.
HorizontalFurnaces
wARNING:
Thefurnacemustnotbeinstalleddirectlyon
carpeting,tile,oranycombustiblematerialother
thanwoodooring.
• The*SAseriesgasfurnacecanbeinstalledhorizontally
(Figure 7) in an attic, basement, crawl space or alcove.
It can also be suspended from a ceiling in a basement
or utility room in either a right to left airflow or left to
right airflow as shown in Figure 8.
• *SAseriesfurnacesareshippedwiththebottompanel
installed. If the furnace is installed horizontally, remove
the bottom panel from the furnace before attaching the
duct system. See Bottom Panel Removal on page 15.
• Ifinstallingthefurnaceinanattic,itisrequiredthata
drip pan be placed under the furnace. If the installation is
on a combustible platform (Figure 7), it is recommended
that the drip pan extend at least 12 inches past the top
and front of the furnace.
• Ifsuspendingthefurnacefromtheceiling,assemblea
support frame (Figure 8) using slotted iron channel and
full threaded rod. Fasten the frame together with nuts,
washers, and lockwashers. Secure the support frame
to the rafters with lag bolts. The furnace can also be
suspended using steel straps around each end of the
furnace. The straps should be attached to the furnace
with sheet metal screws and to the rafters with bolts.
• Itisrecommendedforfurtherreductionofrehazard
that cement board or sheet metal be placed between the
furnace and the combustible floor and extend 12 inches
beyond the front of the door and top of the furnace.
Figure7.*SAHorizontalInstalledonaPlatform
Gas Inlet
Wood or
non-combustible
Platform
Type “B” Vent
Coil Plenum
Electrical Supply
Connection