171/2oIN.WIDE
CASINGS ONLY:
INSTALL FELD-SUPPLIED
FILTER FILLER STRIP
UNDER FILTER.
21-IN.WIDE
CASINGS ONLY:
SUPPORT RODS (3)
EXTEND 1/4" ON EACH
SIDE OF FILTER AND
REST ON CASING FLANGE
• WASHABLE
FILTER
FILTER
SUPPORT
FILTER
RETAINER
Fig. 26--Bottom Filter Arrangement
4, Reinstall fiont filler panel and screws
A00290
Step 7--Gas Piping
Gas piping must be installed in accordance with national and local
codes Refer to current edition of NFGC in the United States
Canadian installations must be made in accordance with NSCNG°
i :
BOTTOM
CLOSURE
PANEL
FRONT FILLER
PANEL
A93047
Fig. 2g--Removing Bottom Closure Pane{
22
PI( and all authorities having jurisdiction. Gas supply line should
be a separate line running directly fi'om meter to t:urnace, if
possible. Refer to Table 5 fbr recommended gas pipe sizing. Risers
mnst be used to connect to fhrnace and to meter. Support all gas
piping with appropriate stlaps, hangers, etc. l_se a minimum of 1
hanger ever?" 6 ft. Joint compound (pipe dope) should be applied
sparingly and only to male threads of joints. Pipe dope must be
resistant to propane gas.
FIRE OR EXPLOSION HAZARD
Failure to %llow this warning could result in fire, explosion,
personal ir!iury, or death
-Connect gas pipe to t:m'nace using a backup wrench to avoid
damaging gas controls
-Gas vah'e shutoff switch MUST be thcing _:bp,vard or tilted
upward.
-Never purge a gas line into a combustion chamber. Never
test tbr gas leaks with an open flame. Use a commercially
available soap solution made specifically for the detection of
leaks to cheek all connections.
-Use proper length of pipe to avoid stress on gas control
manit'old,
-It" a flexible connector is required or allowed by authori w
having jurisdiction, black iron pipe shall be installed at
fl/rnace gas valve and extend a n_ininmm of 2 in outside
flul_ace casing.
Install a sediment trap in riser leading to flmaace Trap can be
installed by connecting a tee to riser leading to fimaace so
straight-through section of tee is vertical. Then connect a capped
nipple into lower end of tee Capped nipple should extend below
level of gas controls. Place a ground joint union between gas
control manifold and manual gas shutoff valve (See Fig. 28)
If local codes allow the use of a flexible gas appliance connector,
always use a new listed connector. Do not use a connector which
has previously served another gas appliance.
,i
FIRE OR EXPLOSION HAZARD
Failure to %llow the safety warnings exactly could result in
serious injury, death or property damage.
Never test £_r gas leaks with an open flame. Use a commer-
cially available soap solution made specifically £_r the
detection of leaks to check all connections. A fire or explo=
sion could result causing property damage, personal injury or
toss of lit).
An accessible manual shutoff valve MLST be installed external to
the flul_ace casing and within 6 fi of furnace A 1iS=in NPT
plugged tapping, accessible tbr test gauge connection, MUST be
Table 5--Maximum Capacity of Pipe*
NOMINAL
IRON
PIPE
SIZE
(BN.)
tl2
314
1
1-114
1-tl2
INTERNAL
DIAMETER
{BN.)
0.622
0.824
1.049
1.380
1.610
LENGTH OF PiPE (F7)
10 20 30 40 50
175 120 97 82 73
360 250 200 170 151
680 465 375 320 285
1400 950 770 660 580
2100 1460 1180 990 900
* Cubic fl of gas per hr for gas pressures of 05 psig (14-in. wc) or less, and
a pressure drop of 05qn. wc (based on a 060 specific gravity gas).
Ref: Table 12-2 NFPA 54-2002.
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