12
441 01 2610 00
Figure 7
Clearances
Measure from face of orifice to the
back side of the manifold.
1
1
/
8
²
1
3
/
16
²
29.3
mm
+1.5
--1.1
8. Reassemble all parts in reverse order as removed. Be sure to
engage the main burner orifices in the proper opening in the
burners.
9. After reassembling, turn gas on and check all joints for gas
leaks using a soapy solution. All leaks must be repaired im-
mediately.
Gas Piping Requirements
NOTE:
The gas supply line must be installed by a qualified service
technician in accordance with all building codes, (In the state of
Massachusetts, gas supply connections MUST be performed by a
licensed plumber or gas fitter).
1. Install gas piping in accordance with local codes, or in the ab-
sence of local codes, the applicable national codes.
2. It is recommended that a manual shutoff valve be installed in
the gas supply line outside the unit. Locate valve as close to
the furnace as possible where it is readily accessible. Refer to
Figure 8.
3. Use black iron or steel pipe and fittings or other pipe approved
by local code.
4. Use pipe thread compound which is resistant to natural and
LP gases.
NOTE:
The use of copper tubing for gas piping is NOT approved
by the state of Massachusetts.
5. Use ground joint unions and install a drip leg no less than 3
²
long to trap dirt and moisture before it can enter gas valve.
6. Provide a
1
/
8
²
inch plug for test gauge connection immediate-
ly up stream of gas supply connection to furnace.
7. Use two pipe wrenches when making connections to prevent
gas valve from turning.
Typical Gas Piping
Figure 8
25--24--35a
Union
Manual
Valve
Drip leg & pipe cap
left side entry
8. Flexible corrugated metal gas connector may
NOT
be used
inside the furnace or be secured or supported by the furnace
or ductwork.
9. Properly size gas pipe to handle combined appliance load or
run gas pipe directly from gas meter or LP gas regulator.
10. Install correct pipe size for run length and furnace rating.
11. Measure pipe length from gas meter or LP second stage reg-
ulator to determine gas pipe size.
CAUTION
Use wrench to hold gas valve when turning elbows and
gas line to prevent damage to the gas valve and fur-
nace.
Left Side Gas Entry
Pipe can be ran directly to gas valve.
Right Side Gas Entry
Requires two(2) 90
°
elbows and nipples.
FIRE OR EXPLOSION HAZARD.
Failure to properly install metal gas connector can
result in death, bodily injury and/or property
damage.
The flexible corrugated metal gas connector must
be properly installed, cannot go through the side of
the furnace, and can not be used inside the
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.
