Lennox Hearth LMDV-4035-CPM, LMDVT-3328-CPM, LMDV-4035-CNM Electronic Appliances Honeywell Systems

Step 6. Electronic Appliances -

Honeywell Systems

See Figure 67 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 for natural gas units.

OFF ON CONTROL	Inlet Pressure Test Port
	I
IGNITE
	ISP
Manifold
Pressure
Test Port
Slotted
Cap
	Spring
	Adjusting
	Screw
Figure 67

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.

See Figure 68 and replace the pilot orifice as follows: Remove the Igniter assembly retainer clip, and carefully remove the Igniter assembly.

Exercise extreme care to prevent damage to or breakage of the Igniter assembly. Remove the screw securing the pilot assembly to its mount- ing 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 the conversion kit. Reinstall the pilot assembly by reversing the steps detailed here.

When reinstalling the Igniter assembly, use extreme care to prevent damage and break- age. Do not apply any leverage to the Igniter assembly while restoring the retainer clip to its original position.

All Models

Step 7. Remove the burner orifice from the manifold and replace it with the one provided with the kit. See Table 14 for orifice sizes required for use with natural gas or propane gas. Figure 69 illustrates the orifice.

Burner Orifice Sizes

Elevation 0-4500 feet ( 0-1372 meters)

Model	Natural	Propane
	Gas	Gas
Series
	drill	drill size (inches)
	sizez(inches)
LMDVT-3328	#45 (.082") *	1.2mm (.048") *
LMDVR-3328	39L66 •	99K78 •
LMDV-3530	#44 (.086") *	#55 (.052") *
	60J8001 •	19L5201 •
LMDV-4035	#37 (.104") *	1/16" (.062")*
	24M1001 •	21L0101 •

*Standard size installed at factory

• Part /Cat. Number

Table 14

Pilot Assembly

Pilot Orifice

Ignitor

Figure 69

Assembly

	Retaining
Flare Nut	Clip

Note: If the Igniter is damaged, a replacement kit is available - order Catalog Number 87L54.

Figure 68

Step 8. Reassemble all removed components by reversing the procedures outlined in the preceding steps. Use pipe joint compound or Teflon tape on all pipe fittings before installing (ensure propane resistant compounds are used in propane applications, do not use pipe joint compounds on flare fittings).

Step 9. Attach the conversion label provided in the conversion kit to the rating plate on the appliance.

Step 10. Turn on gas supply and test for gas leaks.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Lennox reserves the right to make changes at any time, without notice, in design, materials, specifications, prices and also to discontinue colors, styles and products. Consult your local distributor for fireplace code information.

Printed in U.S.A. © 2005 by LENNOX HEARTH PRODUCTS

36 P/N 850,029M REV. G 05/2008 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

1110 West Taft Avenue • Orange, CA 92865