FURNACE
(OR COIL CASING
WHEN USED)
COMBUSTIBLE
FLOORING
DOWNFLOW |
SUBBASE |
SHEET METAL |
PLENUM |
FLOOR |
OPENING |
A96285
Fig. 6—Furnace, Plenum, and Subbase Installed on
Combustible Floor
2.When completed, downflow subbase, plenum, and furnace (or coil casing when used) should be installed as shown in Fig. 6.
Step 4—Horizontal Attic Installation
Do not install furnace on its back; safety control operation will be adversely affected. Never connect
The furnace can be installed horizontally on either the
CONSTRUCT WORKING PLATFORM
Construct working platform on location where all required furnace clearances are met. (See Table 1 and Fig. 8.)
INSTALL FURNACE
1.Position furnace in desired location.
2.Connect gas supply pipe. See Fig. 8 for typical piping entry.
3.Connect supply- and
4.Install
5.Install 24- X
→Step 5—Horizontal Crawlspace Installation
The furnace can be installed horizontally with either the LH or RH side up. In a crawlspace, furnace can either be hung from floor joist (see Fig. 9) or installed on suitable blocks or pad. (See Fig.
FURNACE
CD5 OR CK5
COIL ASSEMBLY
OR KCAKC
COIL BOX
COMBUSTIBLE |
FLOORING |
SHEET METAL |
PLENUM |
FLOOR |
OPENING |
A96284 |
Fig. 7—Furnace, Plenum, and Coil Assembly or Coil
Box Installed on Combustible Floor
10.) The furnace can be suspended from each corner by hanger bolts (4 each
Since horizontal crawlspace installation is very similar to attic installation, refer to Step 4. The installation of a sheet metal shield in front of louvered control panel is covered in Step 4. For a crawlspace installation, this same sheet metal shield must be installed above louvered control panel. Extend sheet metal shield over furnace top far enough to cover gas pipe entry hole.
Step 6—Filter Arrangement
Never operate unit without a filter or with filter access door removed. A failure to follow this warning could result in fire, personal injury, or death.
The 2
Step 7—Gas Piping
→Gas piping must be installed in accordance with national and local codes. Refer to the NFGC NFPA
Canadian installations must be installed in accordance with NSC- NGPIC and all authorities having jurisdiction.
The gas supply line should be a separate line directly from the meter to the furnace, if possible. Refer to Table 5 for recom- mended gas pipe sizing. Risers should be used to connect to the furnace and to the meter.
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