9. After reassembling, turn gas on and check all joints for gas
leaks using a soapy solution. All leaks must be repaired im-
mediately.
Clearances
Measure from face of orifice to the
batck side of the manifold,
29.3 +_11"5mm "\k,,..k--..,.,.r_j
LP Conversion
I An accessory kit shall be used to convert to propane gas use, see
the furnace rating plate for the LP conversion accessory kit part
number.
CARBON MONOXIDE POISONING HAZARD.
Failure to follow this warning can result in
death, property damage and/or personal
injury.
NOx inserts for use with Natural Gas units
ONLY. If LP Gas is required, NOx inserts must
be removed.
FIRE, EXPLOSION, UNIT DAMAGE HAZARD.
Failure to follow this warning can result in
death, property damage and/or personal
injury.
An LP conversion accessory kit is required
when operating the furnace with LP gas.
*8MPLs and N8MPLs contain NOx inserts.
For LP conversion remove screws that secure the NOx insert and
discard insert.
Reinstall screws. See Figure 37
NOTE: It is very important to reinstall the NOx insert mounting
screws.
Removing NOx inserts
25-40-03

Main Burner Flame Check

Allow the furnace to run approximately 10 minutes. Then inspect
the main burner flames. See Figure 38.
Check for the following:
• Stable and blue flames. Dust may cause orange tips or
wisps of yellow, but flames MUST NOT have solid, yellow
tips.
• Flames extending directly from burner into heat exchanger.
• Flames do NOT touch sides of heat exchanger
If any problems with main burner flames are noted, it may be nec-
essary to adjust gas pressures or check for drafts.
Main Burner
10-10-78
NOTE: For Ignitor location see Figure 39.
441 01 261302