Lennox Elite Series Installation Instructions Manual page 17

FIREBOX SUBFLOOR
FRONT OF FIREPLACE
BURNER POSITIONING
NOTE: INSTALL REAR BURNER FIRST,
THEN FRONT BURNER.
BRACKET A
REAR BURNER
f i r e - p a r t s . c o m
FRONT BURNER
Note: The burners are not identical. Position them so
that the circular burner ports run as shown. Note
especially the vertical run of ports relative to the pilot
burner. Bracket A on the rear burner will interfere
with the pilot burner if an attempt is made to install
the rear burner in the front burner's position.
Figure 31
Millivolt Appliances
Step 4. SIT Systems - Refer to Figure 32 and
the instructions provided with the kit. Using a
Torx T20, remove and discard the three pres-
sure regulator mounting screws. Remove the
pressure regulator, spring, poppet, diaphragm
and bushing. Discard all removed compo-
nents. Ensure the rubber gasket installed on
the back of the replacement pressure regulator
is properly positioned and install the new pres-
sure regulator using the new screws supplied
with the kit. Tighten screws to 25 In. lb. torque.
REAR BURNER
Pressure
Regulator
FRONT BURNER
Figure 32
Step 5. Attach manometer to the manifold side
pressure test fitting and verify manifold pres-
sure reads 3.5 inches water column (0.87 kPa)
for natural gas, and 10.0 inches water column
(2.49 kPa) for propane gas.
BURNER
Step 6. Refer to Figure 33 and remove the
PORTS
pilot hood assembly to access the hexed pilot
orifice. Remove and replace the orifice with
the one provided with the kit.
PILOT
BURNER
Pilot
Orifice
Figure 33
Electronic Appliances
Step 7. Honeywell Electronic Valves - See
Figure 34 and the instructions provided with
the kit. Remove the slotted cap screw, o-ring,
pressure-regulating adjusting screw and
spring. Retain all parts for possible later use.
Install new components from the kit. Black
cap and red spring for propane gas units.
Silver cap and stainless steel spring fro natural
gas units. Before installing the cap, attach
manometer to the manifold side pressure test
fitting and adjust screw until pressure reads
3.5 inches water column (0.87 kPa) for natural
gas, and 10.0 inches water column (2.49 kPa)
for propane gas.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Manifold
Pressure
Test Port
Remove
These
Components
Slotted
Cap
Figure 34
See Figure 35 and replace the pilot orifice as
follows: Remove the ignitor assembly retainer
clip, and carefully remove the ignitor assembly.
Exercise extreme care to prevent damage to
or breakage of the ignitor assembly. Remove
the screw securing the pilot assembly to its
mounting bracket. Back off the flare nut at the
end of the pilot gas line to free the pilot assem-
bly from the gas line. Remove the pilot orifice
and replace it with the one provided with the
conversion kit. Reinstall the pilot assembly by
reversing the steps detailed here.
When reinstalling the ignitor assembly, use
extreme care to prevent damage and break-
age. Do not apply any leverage to the ignitor
assembly while restoring the retainer clip to
its original position.
Pilot
Orifice
Note: If the ignitor is damaged, a replace-
ment kit is available, order Catalog Number
87L54.
Figure 35
Inlet Pressure Test Port
Spring
Adjusting
Screw
Pilot
Assembly
Ignitor
Assembly
Retaining
Clip
Flare Nut
17