Kenmore N8MSL0701412A1 Installation Instructions Manual page 19

FURNACE OVERHEAT HAZARD
Failure to follow this caution may result in unit
component damage.
Connect gas pipe to gas valve using a backup
wrench to avoid damaging gas controls and burner
misatiqnment.
An accessible manual equipment shutoff valve MUST be
installed external to furnace casing and within 6 ft. (1.8 M) of
furnace. A 1/8-in. (3 mm) NPT plugged tapping, accessible
for test gauge connection, MUST be installed immediately
upstream of gas supply connection to furnace and
downstream of manual equipment shutoff valve.
NOTE: The furnace gas valve inlet pressure tap connection
is suitable to use as test gauge connection providing test
pressure DOES NOT exceed maximum 0.5 psig (14-in. w.c.)
stated on gas control valve. (See Figure 41)
Figure 21 - Burner and Manifold
TOP VIEW OF BURNER AND MANIFOLD ASSEMBLY
2" (51 ram)Nipple
Street
Supply
t-Gas Valve
A08551
Figure 22 - Typical Gas Pipe Arrangement
GAS--
SUPPLY
j'"_
MANUAL J
II
SHUTOFF
_ _
VALVE
(REQUIRED)_ "1_
}_
SEDIMENT--
/
TRAP
/
UNION.-.J
A02035
Some installations require gas entry on right side of furnace
(as viewed in upflow.) (See Figure 21)
Install a sediment trap in riser leading to furnace as shown in
Figure 22. Connect a capped nipple into lower end of tee.
Capped nipple should extend below level of furnace gas
controls. Place a ground joint union between furnace gas
control valve and exterior manual equipment gas shutoff
valve. A 1/8-in. (3 mm) NPT plugged tapping, accessible for
test gauge connection, MUST be installed immediately
upstream of gas supply connection to furnace and
downstream of manual equipment shutoff valve.
Piping should be pressure and leak tested in accordance with
NFGC, local, and national plumbing and gas codes before
the furnace has been connected. After all connections have
been made, purge lines and check for leakage at furnace
prior to operating furnace.
If pressure exceeds 0.5 psig (14-in. w.c.), gas supply pipe
must be disconnected from furnace and capped before and
during supply pipe pressure test. If test pressure is equal to or
less than 0.5 psig (14-in. w.c.), turn off electric shutoff switch
located on furnace gas control valve and accessible manual
equipment shutoff valve before and during supply pipe
pressure test. After all connections have been made, purge
lines and check for leakage at furnace prior to operating
furnace.
Figure 23 - Relocating J-Box
FACTORY
INSTALLED
LOCATION
ALTERNATE
FIELD
LOCATION
Figure 24 - Field-Supplied Electrical Box on Furnace
Casing
O
The gas supply pressure shall be within the maximum and
minimum inlet supply pressures marked on the rating plate
with the furnace burners ON and OFF.
441 01 1402 02
19