Sears N8MPL050B12B1 - Manual (Page 20)

2. Follow steps 2 through 4 Piping with Street Elbows.
1. Screw one elbow onto gas valve with the outlet facing away
from the furnace.
2. Screw second elbow onto first elbow tight enough to be leak
proof. An additional V
4 turn will be required at the end of step
2. See Figure 17 and Figure 18.
Figure 17
Gas Valve with Elbows (*8MP)
25-25-03
Figure 18
Gas Valve with Elbows (*8MP)
3. Gas supply line then can be run directly into opening of elbow.
Piping with Close Nipples and Standard Elbows
1. Assemble elbows and nipples similar to street elbows shown
in Figure 13.
WARNING
FIRE OR EXPLOSION HAZARD.
Failure to properly install metal gas connector could
result in death, personal injury and/or property
damage.
A flexible corrugated metal gas connector must be
properly installed, shall not extend through the side
of the furnace, and shall not be used inside the
furnace.
Black iron pipe shall be installed at the furnace gas
control valve and extend a minimum of 2" outside
furnace.
Additional LP Piping Requirements
• Have a licensed LP gas dealer make all connections at stor­
age tank and check all connections from tank to furnace.
• If copper tubing is used, it MUST comply with limitation set in
Local Codes, or in the absence of local codes, the gas codes
of the country having jurisdiction.
• Two-stage regulation of LP gas is recommended.
wmrnm
FIRE OR EXPLOSION HAZARD.
An open flame or spark could result in death,
personal injury and/or property damage.
Liquefied petroleum (LP) gas is heavier than air and
will settle and remain in low areas and open
depressions.
Thoroughly ventilate area and dissipate gas. Do
NOT use a match or open flame to test for leaks, or
attempt to start up furnace before thoroughly
ventilating area.
Final Check
• Test all pipe for leaks.
• If orifices were changed, make sure they are checked for
leaks.
• During pressure testing of gas supply piping system:
a. If test pressure does not exceed V 2" psi, isolate the
furnace from the gas supply piping system by closing the
equipment shutoff valve.
b. If test pressure exceeds V 2" psi, the furnace and its manual
equipment shutoff valve must be disconnected from the gas
supply piping system.
• To check for leaks apply soap suds or a liquid detergent to
each Joint. Bubbles forming indicate a leak.
• Do not use an open flame to test for gas leaks. Fire or explo­
sion could occur.
• Correct even the smallest leak at once.
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