Step 6. Electronic Appliances -

See Figure 66 and replace the pilot orifice as

Honeywell Systems

follows: Remove the ignitor assembly retainer

See Figure 65 and the instructions provided

clip, and carefully remove the ignitor assembly.

 

with the kit. Remove the slotted cap screw,

Exercise extreme care to prevent damage to

o-ring, pressure-regulating adjusting screw

or breakage of the ignitor assembly. Remove

and spring. Retain all parts for possible later

the screw securing the pilot assembly to its

use. Install new components from the kit.

mounting bracket. Back off the flare nut at the

Black cap and red spring for propane gas

end of the pilot gas line to free the pilot

units. Silver cap and stainless steel spring

assembly from the gas line. Remove the pilot

for natural gas units. Before installing the

orifice and replace it with the one provided

cap, attach manometer to the manifold side

with the conversion kit. Reinstall the pilot

pressure test fitting and adjust screw until

assembly by reversing the steps detailed here.

pressure reads 3.5 inches water column (0.87

 

kPa) for natural gas, and 10.0 inches water

When reinstalling the ignitor assembly, use

column (2.49 kPa) for propane gas.

extreme care to prevent damage and break-

 

 

age. Do not apply any leverage to the ignitor

OFF ON CONTROL

Inlet Pressure Test Port

assembly while restoring the retainer clip to

its original position.

 

I

IGNITE

 

 

 

ISP

 

 

 

All Models

Manifold

 

Step 8. Remove the burner orifice from the

Pressure

 

manifold and replace it with the one pro-

Test Port

 

vided with the kit. See the following table for

 

 

Slotted

 

orifice sizes for natural and propane mod-

 

els. Figure 67 illustrated the orifice.

Cap

 

 

 

Spring

Adjusting

Screw

Figure 65

Pilot

Assembly

Model

Orifice size

Elevation

 

 

Feet

Series

 

 

 

 

(meters)

 

Nat.

Prop.

 

 

 

 

 

 

MPDT-3328

#45

0.048 inch

 

MPDR-3328

 

 

 

 

 

 

 

0-4500

MPD-3530

#44

#55

 

 

 

(0-1370)

MPD-4035

#37

0.062 inch

 

 

 

 

 

MPD-4540

#36

#52

 

 

 

 

 

Figure 67

Step 9. 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 10.Attach the conversion label provided in the conversion kit to the rating plate on the appliance.

Step 11. Turn on gas supply and test for gas leaks.

Pilot Orifice

Ignitor

Assembly

 

Retaining

Flare Nut

Clip

Note:

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

Figure 66

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Lennox Hearth Products 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. © 2002 by Lennox Hearth Products

P/N 850,014M REV. R 06/2008

 

1110 West Taft Avenue • Orange, CA 92865

 

 

 

Page 31 Page 32
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Lennox Hearth MPD-45 Series, MPD-40 Series, MPD-35 Series, MPD-33 Series Pilot Assembly, Ignitor Assembly, Flare Nut Clip
Page 31 Page 32

MPD-35 Series, MPD-45 Series, MPD-33 Series, MPD-40 Series specifications

The Lennox Hearth MPD-33, MPD-40, MPD-45, and MPD-35 Series are sophisticated and innovative products designed for both aesthetic appeal and functional heating efficiency. These multi-sided gas fireplaces are engineered to bring warmth and style to any space, making them a popular choice for homeowners looking to enhance their living environment.

One of the standout features of the MPD Series is their versatile design. Each model is available in different sizes with stylish options, catering to various room dimensions and decor styles. The MPD-33, MPD-40, and MPD-45 models provide flexibility in installation, while the MPD-35 offers extra depth for a more pronounced fire presence, making them suitable for both contemporary and traditional interiors.

A key characteristic of the Lennox Hearth MPD Series is its high-efficiency operation. These fireplaces are designed to maximize heat output while minimizing fuel consumption, resulting in lower energy bills. The innovative burner system produces a realistic flame effect that can be adjusted to create the perfect ambiance for any occasion. The use of advanced technology ensures that the heat generated is evenly distributed, enhancing overall comfort.

Safety is paramount in the design of the MPD Series. Each model is equipped with a state-of-the-art safety shut-off system that activates if the flame goes out, ensuring peace of mind for users. Additionally, the glass front not only provides a clear view of the flames but is designed to stay cool to the touch, making it safe for families with children and pets.

The efficiency of these models is further complemented by an optional remote control feature, allowing users to adjust the flame height and thermostat settings with ease. The MPD Series is also compatible with smart home systems, providing users with added convenience.

Overall, the Lennox Hearth MPD-33, MPD-40, MPD-45, and MPD-35 Series exemplify the perfect combination of efficiency, safety, and design. Their ability to blend function with visual appeal makes them an ideal choice for creating a cozy atmosphere in any room, from living areas to bedrooms. These fireplaces stand as a testament to Lennox's commitment to quality and innovation in home heating solutions. With advanced technologies and a focus on user comfort, the MPD Series is designed to meet the needs of modern homeowners seeking reliable and stylish heating options.
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