Lennox gas conversion kit fgck Benutzerhandbuch

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Step 9. SIT Systems - Refer to 

Figure 1.  Using

a Torx T20, or a flat screwdriver, remove and
discard the three pressure regulator mounting
screws.  Remove the pressure regulator, spring,
poppet, diaphragm and bushing.

Discard all removed components.  Ensure the
rubber gasket installed on the back of the
replacement pressure regulator is properly
positioned and install the new pressure regula-
tor using the new screws supplied with this kit.
Tighten screws to 25 In. lb. torque.

Step 10.  Refer to 

Figure 3  and remove the

pilot hood assembly to access the hexed pilot
orifice.  Using a (4mm) Allen wrench, remove
and replace the orifice with the one provided
with this kit.  

Figure 4  shows the pilot reas-

sembled, with proper flame.  

Figure 5  shows

a typical pilot to burner relationship.

Step 11. SIT Systems - See 

Figure 8.  Using a

Torx T20, or a flat screwdriver, remove and
discard the three pressure regulator mounting
screws.  Remove the pressure regulator, spring,
poppet, diaphragm and bushing.  Discard all
removed components.

Using a standard tin snip cutting tool, proceed
to trim shoulder off of the regulator provided
with the kit.  Ensure the rubber gasket installed
on the back of the replacement pressure regu-
lator is properly positioned and install the new
modified pressure regulator using the new
screws supplied with this kit.  Tighten screws to
25 In. lb. torque.

Step 12.  Refer to 

Figure 6  and replace the pilot

orifice as follows:  Remove the ignitor assem-
bly retainer clip, and carefully remove the igni-
tor assembly.  Exercise extreme care to pre-
vent 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 assembly from the gas line.

Remove the pilot orifice and replace it with the
one provided with this conversion kit.  Rein-
stall 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.

Step 13.  Unscrew the orifice from the manifold
and replace it with the one provided with this kit
(

Figure 9 ).

Step 14. Reassemble all removed compo-
nents by reversing the procedures outlined in
the preceding steps.  Use pipe joint compound
or Teflon tape on all pipe fittings before install-
ing (ensure propane resistant compounds are
used in propane applications, do not use pipe
joint compounds on flare fittings).  Adjust the
air shutter opening on the burner tube, refer to
Note on page 1.

Step 15. Attach appropriate conversion kit
label (

Figure 10 ) next to the rating plate on the

appliance.  Attach the installer conversion
label next to the gas valve, after filling out the
information on the label.  Refer to the Installa-
tion Instructions for required input rating.

INPUT BTU/HR  –  50,000

MANIFOLD PRESSURE  –  3.5"

ORIFICE SIZE  –  (0.130)

INPUT BTU/HR  –  50,000

MANIFOLD PRESSURE  –  10"

ORIFICE SIZE  –  (0.080)

Step 18.  For detailed Lighting Instructions,
refer to the Homeowners/Care And Operations
instructions.

Step 16. Turn on gas supply and test for gas
leaks, using a gas leak test solution (also
referred to as bubble leak solution).

Step 17.  Attach manometer to the manifold
side pressure test fitting (

¹⁄₄" Allen wrench for

Electric units) and adjust screw until pressure
reads 3.5 inches water column (6.54 MmHg)
for natural gas, and 10.0 inches water column
(18.69 MmHg) for propane gas.  Refer to the
Installation Instructions and the Table below.