Desa AND VM42 User Manual

B-VENT DECORATIVE GAS FIREPLACE

OWNER’S OPERATION AND INSTALLATION MANUAL

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MODELS M36(B,H), M42(B,H), VM36(B,H), AND VM42(B,H)

NATURAL GAS

WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.

FOR YOUR SAFETY

— Do not store or use gasoline or any other flam-

mable vapors or liquids in the vicinity of this or any other appliance.

— WHAT TO DO IF YOU SMELL GAS :

• Do not try to light any appliance.

• Do not touch any electrical switch;

• Do not use any phone in your building.

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire department.

— Installation and service must be performed by a

qualified installer, service agency, or the gas supplier.

SAVE THIS BOOK

This book is valuable. In addition to instructing you on how to install and maintain your appliance, it also contains information that will enable you to obtain replacement parts or optional accessory items when needed. Keep it with your other important papers.

WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional information consult a qualified installer, service agency, or the gas supplier.

NOT FOR USE WITH SOLID FUEL

CHECK LOCAL CODES PRIOR TO

INSTALLATION

MASSACHUSETTS STATE CODE REQUIRES THE VENT DAMPER TO BE WELDED OPEN OR REMOVED.

This appliance may be installed in an aftermarket*, permanently located, manufactured (mobile) home, where not prohibited by state or local codes.

This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases, unless a certified kit is used.

*Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer.

Save this manual for future reference.

TABLE OF CONTENTS

SAFETY INFORMATION

TABLE OF CONTENTS

SAFETY INFORMATION ............................................................ 2

UNPACKING............................................................................... 3

INTRODUCTION......................................................................... 4

PRODUCT SPECIFICATIONS.................................................... 5

SELECTING LOCATION............................................................. 6

PRE-INSTALLATION PREPARATION ........................................ 6

VENTING INSTALLATION .......................................................... 9

INSTALLATION ..........................................................................11

OPERATING FIREPLACE ........................................................ 18

INSPECTING BURNERS.......................................................... 19

SAFETY INFORMATION

WARNINGS

WARNING: This product contains and/or generates chemicals known to the State of California to cause cancer or birth defects, or other reproductive harm.

IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate, or service this fireplace. Improper use of this fireplace can cause serious injury or death from burns, fire, explosions, electrical shock, and carbon monoxide poisoning.

DANGER: Carbon monoxide poisoning may lead to death!

This fireplace is a vented product. This fireplace will not produce any gas leakage into your home if properly installed. This fireplace must be properly installed by a qualified service person. If this unit is not properly installed by a qualified service person, gas leakage can occur.

Carbon Monoxide Poisoning: Early signs of carbon monoxide

poisoning resemble the flu, with headaches, dizziness, or nausea. If you have these signs, the fireplace may not have been installed properly. Get fresh air at once! Have fireplace inspected and serviced by a qualified service person. Some people are more affected by carbon monoxide than others. These include pregnant women, people with heart or lung disease or anemia, those under the influence of alcohol, and those at high altitudes.

Propane/LP gas and natural gas are both odorless. An odor-making agent is added to each of these gases. The odor helps you detect a gas leak. However, the odor added to these gases can fade. Gas may be present even though no odor exists.

Make certain you read and understand all warnings. Keep this manual for reference. It is your guide to safe and proper operation of this fireplace.

CLEANING AND MAINTENANCE ............................................ 20

SERVICE HINTS....................................................................... 20

TECHNICAL SERVICE ............................................................. 20

WIRING DIAGRAM ................................................................... 20

REPLACEMENT PARTS .......................................................... 20

TROUBLESHOOTING .............................................................. 21

ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ....... 24

OWNER’S REGISTRATION FORM.......................................... 27

ACCESSORIES ........................................................................ 29

WARRANTY INFORMATION...................................... Back Cover

WARNING: Any change to this fireplace or its

controls can be dangerous.

1. This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases unless a certified kit is used.

2. For propane/LP fireplace, do not place propane/LP supply tank(s) inside any structure. Locate propane/LP supply tank(s) outdoors. To prevent performance problems, do not use propane/LP fuel tank of less than 100 lbs. capacity.

3. If you smell gas

• shut off gas supply

• do not try to light any appliance

• do not touch any electrical switch; do not use any phone in

your building

• immediately call your gas supplier from a neighbor’ s phone.

Follow the gas supplier's instructions

• if you cannot reach you gas supplier , call the fire department.

4. Never install the fireplace

• in a recreational vehicle

• where curtains, furniture, clothing, or other flammable objects

are less than 42" from the front, top, or sides of the fireplace

• in high traffic areas

• in windy or drafty areas

5. This fireplace reaches high temperatures. Keep children and adults away from hot surfaces to avoid burns or clothing ignition. Fireplace will remain hot for a time after shutdown. Allow surfaces to cool before touching.

6. Carefully supervise young children when they are in the room with fireplace.

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SAFETY INFORMATION

UNPACKING

SAFETY INFORMATION

Continued

7. A hearth extension is not required with this appliance. If one is installed, it is for aesthetic purposes only and does not have to meet the standard requirements.

8. Turn fireplace off and let cool before servicing or repairing. Only a qualified service person should install, service, or repair this fireplace. Have fireplace inspected annually by a qualified service person.

9. You must keep control compartments, burners, and circulating air passages clean. More frequent cleaning may be needed due to excessive lint and dust from carpeting, bedding material, etc. Turn off the gas valve and pilot light before cleaning fireplace.

10. Have venting system inspected annually by a qualified service person. If needed, have venting system cleaned or repaired. See Cleaning and Maintenance, page 20.

11. Keep the area around your fireplace clear of combustible materials, gasoline, and other flammable vapor and liquids. Do not run fireplace where these are used or stored. Do not place items such as clothing or decorations on or around fireplace.

12. Do not use this fireplace to cook food or burn paper or other objects.

13. Do not use any solid fuels (wood, coal, paper , cardboard, etc.) in this fireplace. Use only the gas type indicated on fireplace nameplate.

14. This appliance, when installed, must be electrically grounded in accordance with local codes or, in the absence of local codes, with the National Electrical Code, ANSI/NFPA 70, or the Ca- nadian Electrical Code, CSA C22.1.

15. Do not obstruct the flow of combustion and ventilation air in any way. Provide adequate clearances around air openings into the combustion chamber along with adequate accessibility clearance for servicing and proper operation.

16. Do not install fireplace directly on carpeting, vinyl tile, or any combustible material other than wood. The fireplace must set on a metal or wood panel extending the full width and depth of the fireplace.

17. Do not use fireplace if any part has been exposed to or under water. Immediately call a qualified service person to arrange for replacement of the unit.

18. Do not operate fireplace if any log is broken.

19. Do not use a blower insert, heat exchanger insert, or other accessory not approved for use with this fireplace.

20. Provide adequate clearances around air openings.

UNPACKING

The following items are packed inside the firebox. Remove before positioning firebox into framing.

• Transition Collar - For vent connection

• Ceramic Log Pack - Shrink-wrapped on cardboard

• Three (3) plastic bags containing lava rock, pan and ember materials

• Rear Log - Remove the two plastic quick ties from around the burner and grate

• Grate Stand - Lift off of burner pan

Check all items for any shipping damage. If damaged, promptly inform dealer or distributor where you bought the product.

Safely retain these items for later installation.

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INTRODUCTION

Before You Begin

INTRODUCTION

Models M36(B,H), VM36(B,H), M42(B,H) and VM42(B,H) are vented gas fireplaces that use a millivolt gas control valve with a millivolt ignition system. A 6" B-Type venting system and a listed type vent cap are not supplied but are required for proper operation. See venting instructions on pages 9 and 10.

WARNING: This gas appliance must not be connected to a chimney flue servicing a solid fuel burning appliance.

Models M36(B,H), VM36(B,H), M42(B,H) and VM42(B,H) are factory equipped for use with natural gas and must be converted when intended for use with propane/LP gas. A respective model PCBM-36 or PCBM-42 conversion kit may be purchased for simple conversion to propane/LP gas. See Accessories, page 29.

BEFORE YOU BEGIN

Before beginning the installation of your appliance, read these instructions through completely.

This DESA appliance and its approved components are safe when installed according to this installation manual and are operated as recommended by DESA. Unless you use DESA approved components tested for this appliance, YOU MAY CAUSE A FIRE HAZARD!

The DESA warranty will be voided by, and DESA disclaims any responsibility for the following actions :

A) Modification of the appliance or any of the components. B) Use of any component part not approved by DESA in combi-

nation with this appliance.

C) Installation and/or operation in a manner other than instructed

in this manual.

D) The burning of anything other than the type of gas approved

for use in this gas appliance.

The installation must conform with local codes or, in the absence of local codes, with the current National Fuel Gas Code, ANSI Z223.1/ NFPA 54 or with the current CAN/CGA B149 Installation Codes.

This appliance complies with ANSI Z21.50-2000 and CSA 2.22-

2000 as Vented Gas Fireplaces and is listed and tested by the Canadian Standards Association to the above test standards.

WARNING: Installation of this appliance should be done by a qualified service person well trained in the installation of such appliances. You will also need a building permit from your local Building and Safety Commissioner before installing this appliance; otherwise your insurance co. may not cover this appliance.

NOTICE: This appliance is not intended to be used as a primary source of heat.

CAUTION: Do not connect appliance before pressure testing gas piping. Damage to gas valve may result and an unsafe condition may be caused.

The appliance and it’s individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa).

The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.5 kPa).

For the purpose of input adjustment two pressure taps (for IN and OUT pressures) are provided on the gas control valve for test gauge connections to the appliance.

GAS RATING - NATURAL

M36(B,H)/VM36(B,H) M42(B,H)/VM42(B,H)

Max. Input Rating: 40,000 Btu/Hr 45,000 Btu/Hr Manifold Pressure: 3.5 in. WC (.87 kPa) 3.5 in. WC (.87 kPa) Minimum Supply Pressure: 4.5 in. WC (1.12 kPa) 4.5 in. WC (1.12 kPa) Maximum Supply Pressure: 10.5 in. WC (2.66 kPa) 10.5 in. WC (2.66 kPa) Orifice Size: # 30 # 29

GAS RATING - PROPANE/LP

Max. Input Rating: 40,000 Btu/Hr 45,000 Btu/Hr Manifold Pressure: 10.0 in. WC (2.49 kPa) 10.0 in. WC (2.49 kPa) Minimum Supply Pressure: 11.0 in. WC (2.74 kPa) 11.0 in. WC (2.74 kPa) Maximum Supply Pressure: 13.0 in. WC (3.23 kPa) 13.0 in. WC (3.23 kPa) Orifice Size: # 52 # 50

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PRODUCT SPECIFICATIONS

For Use With

6"Ø Type B-1

Vent Pipe Only

Stand Off

Collar

Outside Air Kit Location (Optional)

Gas Supply

Alternate

Inlet

HEARTH AREA

DIMENSIONS

Glass Door (Optional)

1.5"

13.5"

Model 36 Model 42 Model 36 Model 42

A 29" 36" M 42" 49" B 5/8" 5/8" N 36" 40" C 41" 48" O 37" 41" D 12" 14" P 8 5/8" 10 1/2" E 21 1/4" 23" Q 13 7/8" 14" F 22 1/4" (24" w/o Brick) 29 1/4" (31" w/o Brick) R 10 1/2" 12 1/2" G 32 5/8" (34" w/o Brick) 39 1/2" (41 1/4" w/o Brick) S 2 1/2"2 H 15 3/4" (16 3/4" w/o Brick) 17 3/4" (18 3/4" w/o Brick) T 8 1/8"8

/2"

/8" I 40 1/4" 44 1/4" U 11" 12 3/4" J 21" 24" V 7" 7" K8"9"W2

/4"2

/4" L 34 3/4" 42" X 5" 4 1/2"

Figure 1 - Appliance Dimensions

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SELECTING LOCATION

PRE-INSTALLATION PREPARATION

Clearances

SELECTING LOCATION

To determine the safest and most efficient location for your appliance, you must take into consideration the following guidelines:

1. The location must allow for proper clearances (see Clearances, next column).

2. Consider a location where heat output would not be affected by drafts, air conditioning ducts, windows, or doors.

3. A location that avoids the cutting of joists or roof rafters will make installation easier. Figure 2 shows a plan view of a few common locations.

Flush installations are recommended where living space is limited or at a premium, and since the space required to enclose the appliance would be located beyond an outside wall, this would also reduce the cutting of joists, roof rafters, and such. Check local codes for any restrictions.

Projected installations can extend any distance into the room. A projection may be ideal for a new addition on an existing, finished wall.

Corner installations make use of space that may not normally be used and provides a wider and more efficient range for radiant heat transference.

Internal wall installations provide a discreet option for room separation and can also be ideal as an addition to an existing wall.

PRE-INSTALLATION PREPARATION

CLEARANCES

Minimum clearances to combustibles are:

• Back and Sides of Outer Surround............................ 0" min.

• Drywall to Sides of Front Face (Nailing Flanges) ... 0" min.

• “B” Vent Surfaces ..................................................... 1" min.

• Ceiling to Opening .................................................. 42" min.

• Floor .......................................................................... 0" min.

• Perpendicular Wall ............................... See Figure 6, page 7

CAUTION: Do not block required air spaces with insulation or any other material. Do not obstruct effective opening of appliance with any type of facing material.

2 x 4 Stud Nailing

Back

0" Clearance

Left Side Surround

Flange

CORNER

INTERNAL WALL INSTALLATION

FULL PROJECTION INSTALLATION

INSTALLATION

FLUSH INSTALLATION

Figure 2 - Possible Locations for Installing Appliance

Front Face

Figure 3 - Minimum Clearances (Top View)

1" (25mm) Min. Clearance to "B" Vent’s Outer Pipe

Ceiling

42" (1067mm) Min. Clearance from Opening to Ceiling

0" Clearance to Combustible or Noncombustible Flooring

0" Clearance

DO NOT BLOCK

OR OBSTRUCT

OPENINGS

Maintain 2" (51mm) Min. Clearance to the Transition Pipe as Measured at the Outer Vent Collar

Drywall

Required Air Spaces are Indicated with

". Do Not

an "

Pack with Insulation or Any Other Material

Figure 4 - Minimum Clearances (Front View)

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PRE-INSTALLATION PREPARATION

Continued

PRE-INSTALLATION PREPARATION

Mantel Clearances and Wall Details

MANTEL CLEARANCES AND WALL DETAILS

A combustible mantle shelf maybe installed a maximum 12" (229mm) from the wall. Figures 5 and 6 show the minimum allowable distances from various combustible mantle components in relation to the fireplace opening.

Combustible Materials

Header

Spacer

6" (152mm)

3" (76mm)

(38mm) Max.

12"

(229mm)

/2"

TOP VIEW

Outer Surround

Combustible Material May Be Used

SAFE

1 1/2" (38mm) Max.

3" (76mm) Max.

6" (152mm) Max.

ZONE

Perpendicular Wall

M36(B,H) M42(B,H)

VM36(B,H) VM42(B,H)

A 9" (229mm) 6" (152mm) B 12" (305mm) 9" (229mm)

Figure 6 - Side Clearances - Top View (Cross Section)

M36(B,H) M42(B,H)

VM36(B,H) VM42(B,H)

A 14" (356mm) 15" (381mm) B 8" (203mm) 9" (229mm)

Figure 5 - Mantel Clearances - Side View (Cross Section)

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PRE-INSTALLATION PREPARATION

Framing Installing Transition Pipe and Starter Collar

PRE-INSTALLATION PREPARATION

Continued

FRAMING

1. Frame appliance enclosure as illustrated in Figures 7 and 8.

Note:

If a wall covering is used to line the enclosure, then all

measurements must be from the surface of the covering.

2. Place the appliance into the framing and secure it.

Note:

If appliance is to be raised above floor level, a platform

must be built to support the appliance.

3. Install the supply line to the appliance using a 1/2" NPT black iron gas line terminating 2 5/16" above the bottom of the appliance. The gas line must be installed through the lower left side access point or alternate access hole in the bottom of the appliance (see Figure 19, page 12).

4. Repack insulation around the gas line to cover any remaining openings in the conduit sleeve. Prepare the incoming gas line with teflon tape or pipe joint compound and hook-up incoming gas line to the flexible gas line.

Note:

If 1/2" NPT black iron pipe does not mate with fitting at the end of flexible gas line, remove fitting and replace with a 37 degree flare 3/4"-12, 1/2" NPT (female) fitting.

WARNING: When finishing appliance, do not overlap combustible material onto the black front face. Brick, tile, or other noncombustible materials may be applied to the face provided that any gap is between the material used and the face is caulked with a noncombustible caulking.

These Dimensions Allow for a 3/4" Clearance at Sides and Back of Fireplace. However, 0" Clearance is Permitted

3/4" Clearance

Not Required at Nailing Flanges

M36(B,H)/VM36(B,H) M42(B,H)/VM42(B,H)

A 24 1/2"(622.3mm) 27 9/16"(700.1mm) B 73 7/8"(1876.4mm) 83 7/8"(2130.4mm) C 52 3/16"(1326mm) 59 5/16"(1506.6mm) D 17 1/4"(438.2mm) 19 1/2"(495.3mm)

Figure 8 - Corner Installation Guidelines

INSTALLING TRANSITION PIPE AND STARTER COLLAR

The transition pipe and starter collar shown in Figure 9 are supplied with the fireplace, unattached and ready for installation. Remove the starter collar and set aside. Slide the transition pipe over the vent collar and attach with a minimum of three screws. Replace the starter collar over the transition pipe and attach using four screws located on the leg stands (five used on the model M42). To install B-vent piping, slide the first piece of B-vent over the transition pipe and attach with a minimum of two screws.

M36(B,H)/VM36(B,H) M42(B,H)/VM42(B,H)

A 40 3/8" (1020mm) 44 3/8" (1121mm) B 21 3/8" (543mm) 23 1/8" (587mm) C 41 1/4" (1048mm) 48 1/4" (1226mm)

Figure 7 - Rough Opening for Installing in Wall

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B-Vent Piping

Starter Collar

Transition Pipe

Vent Collar

Figure 9 - Installing Transition Pipe and Starter Collar

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VENTING INSTALLATION

A B-type venting system must be connected to the appliance for venting to the outside of the building.

The following section is provided as a guide to a standard B-type vent installation.

Standing codes requirements concerning B-type vent installations may vary within your state, province or local codes jurisdiction. Therefore, it is recommended that you check with your local building codes for specific requirements or in absence of local codes, follow Section 7.0 of the current National Fuel Gas Code

ANSI Z223.1/NFPA 54 and in Canada with CAN/CGA B149 for Category I systems using double wall B-1 vent pipe.

This gas appliance must be vented to the outdoors only and may not be terminated into an attic space or into a chimney flue servicing a solid-fuel burning appliance.

This appliance may be vented through a manufactured chimney system or a masonry chimney using a B-vent adapter or a chimney liner system if all are listed, inspected and approved by local codes and/or building authorities.

The examples shown in Figure 10 are typical of most B-vent installations and codes practices.

Listed Vent Cap

Maintain Listed Clearance

Support Each Lateral At Least Every Six (6) Feet

Position Firestop

12' Min.

Maintain Listed Clearance

Position Firestop

60°

Example 1:

Shows the minimum allowable system height and lateral offset for a 60° degree or greater inclination. Code specifies that offsets at 60° degrees or greater are considered horizontal and must follow the 75% percent rule for lateral to total vertical system height. Codes also allows only one offset in the total system when at 60° degrees or greater. The total vertical height in this example represents the minimum height of 8 feet and therefore the allowable lateral is 6 feet when the 75% percent rule applies. If the lateral length must exceed 75% then the system must be sized in accordance with the Category I venting tables.

Example 2:

Shows a multiple offset each at 45° degrees of inclination. Multiple offsets are permitted if they do not exceed 45° degrees of inclination. The total lengths of the two offsets are not required to meet the 75% percent allowable rule.

Example 3:

Shows a single offset at 45° degrees of inclination and therefore the lateral length at 10 feet of offset does not have to meet the 75% percent rule.

In each case the offsets must be supported and firestops must be positioned wherever the vent must pass through a sub-floor, ceiling joist or an attic overhang. The vent pipe must terminate vertically into a listed type vent cap and extend a sufficient height through an approved roof flashing, roof jack or a roof thimble. At all points the listed clearances must be maintained.

45°

Listed Vent Cap

Maintain Listed Clearance

12' Min.

Position Firestop

Listed Vent Cap

45°

10'

Maintain Listed Clearance

12' Min.

Maintain Listed Clearance

Figure 10 - Typical B-Vent Configuration

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Maintain Listed Clearance

EXAMPLE 3EXAMPLE 2EXAMPLE 1

VENTING INSTALLATION

Checking for Proper Venting

VENTING INSTALLATION

Continued

Vent terminations must be located in accordance with height and proximity rules of NFPA No. 54 or CAN/CGA B149. These rules apply to vents at 12 in. diameter or less and require a minimum height in accordance with the roof pitch and a minimum of 8 ft. distance from a vertical wall or obstruction (see Figure 11).

If venting horizontally through a side wall becomes necessary, a listed thimble approved for use with B-type vent must be used. Check with your local codes before venting through a side wall.

Some codes areas allow the use of existing B-type vent systems if the system is at or above the recommended diameter of the flue; in this case 6".

The flue connection must be made using listed B-type connectors and the existing system must be code inspected for damage and proper installation.

It is not recommended that this appliance be common vented with an existing gas burning appliance. However, if it becomes necessary to common vent this appliance, the venting system must be sized and configured in accordance with the common venting guides Appendix G of the current National Fuel Gas Code ANSI Z223.1/ NFPA 54 and in Canada with CAN/CGA B149.

Lowest Discharge Opening

Listed Gas Vent

H (Min) Height From Roof

Listed Vent Cap

8 Ft. Min.

Roof Pitch x/12 Listed Clearance

H (Min.)

Roof Pitch Ft. m

Flat to 6/12 1.0 0.30 6/12 to 7/12 1.25 0.38 Over 7/12 to 8/12 1.5 0.46 Over 8/12 to 9/12 2.0 0.61 Over 9/12 to 10/12 2.5 0.76 Over 10/12 to 11/12 3.25 0.99 Over 11/12 to 12/12 4.0 1.22 Over 12/12 to 14/12 5.0 1.52 Over 14/12 to 16/12 6.0 1.83 Over 16/12 to 18/12 7.0 2.13 Over 18/12 to 20/12 7.5 2.27 Over 20/12 to 21/12 8.0 2.44

Note:

Before connecting this appliance to an existing vent system or a common venting system consult with your local architect, planner, or building official.

WARNING: This appliance must be properly con-

nected to a system and must not be connected to a chimney flue servicing a separate solid fuel burning appliance.

CHECKING FOR PROPER VENTING

After completing and checking the electrical, gas and vent connections, follow the lighting instructions and allow the main burner to run for approximately 5 minutes. Hold a lighted match or cigarette near the top edge of the fireplace opening and play it along the entire length of the opening (see Figure 12). Proper venting should tend to draw the flame or smoke into the appliance. Improper venting or escaping of spillage of burned gas, is indicated when the match flickers or goes out. Smoke from a cigarette will also tend to disperse away from the appliance.

If the appliance is found to be improperly venting, shut it off and notify your installer or a qualified service agency to inspect the venting system.

NOTICE: This appliance is equipped with a vent safety shutoff switch which will shut down the appliance in the case of a venting problem. Do not bypass the vent safety switch. If the appliance should shut down, contact a qualified installer, service agency, or your gas supplier to have the vent inspected before operating.

Check this area along the entire top edge of the fireplace opening. Smoke or flame should be drawn into the appliance opening.

Figure 11 - B-Vent Terminations

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Figure 12 - Checking for Spillage

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INSTALLATION

Wall Switch Installation

INSTALLATION

Optional Wireless Hand-Held Remote Control Installation

WALL SWITCH INSTALLATION

The installation of a wall switch allows you to activate the gas control valve without the normal household electricity since the valve operates on millivolt current supplied by the heat generated by the thermopile. To install the wall switch:

1. Remove the front refractory access panel by lifting up and angling out of the firebox opening (see Figure 13).

2. Use wire and connectors provided. Attach red wire to terminal marked TH/TP on control valve. Attach white wire to blade connector on open end of safety circuit wiring (see Wiring Diagram, page 20).

Note:

If any of the original wire from the unit control must be replaced,

use the same type or a higher rated wire (25 ft. maximum length).

WARNING: Do not wire remote wall switch to main

power supply (Standard 120v household current).

4. Locate wall switch in a convenient location.

5. After wire connections are complete, replace refractory access panel.

OPTIONAL WIRELESS HAND-HELD REMOTE CONTROL INSTALLATION

Note:

If using optional wireless hand-held remote control, the wall

switch is no longer operational.

Installing Receiver

1. Remove the front refractory access panel by lifting up and angling out of the firebox opening (see Figure 13) to expose controls.

2. Disconnect wall switch wires from TH and TH/TP terminals on control valve (see Figure 14).

3. Install remote receiver unit onto mounting bracket using the two plastic mounting clips (see Figure 15).

To Safety Circuit

Note:

If any of the original wire as supplied must be replaced, use

H T

P T

P T H T

Route Millivolt Wires (Supplied) Through Gas Line Conduit Sleeve

To Thermopile

18 AWG TYPE CL2 (UL) 105 C (25 ft. length MAXIMUM) or equivalent.

Wall Switch

(Supplied)

(Back View)

Figure 13 - Removing Front Refractory Access Panel

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108795-01K

Figure 14 - Wall Switch Wiring Diagram

Receiver

Plastic Mounting Clips

Mounting Bracket

Figure 15 - Installing Remote Receiver (Shown from Rear of Mounting Bracket)

INSTALLATION

Optional Wireless Hand-Held Remote Control Installation (Cont.) Gas Line Hook-Up

INSTALLATION

Continued

4. Connect wires to control circuit. Connect white wire to terminal marked TH/TP on control valve. Connect red wire to male blade connector provided at open end of safety circuit wiring (see Wiring Diagram, page 20).

5. Locate the battery clip mounted on the back of the receiver (see Figure 16).

6. Slide 9-volt battery (not included) through the clip.

Note:

Only

use alkaline battery.

7. Attach the terminal wires to the battery (see Figure 16).

8. Replace refractory brick access panel.

9-Volt Battery

Battery Clip

Terminal Wires

Figure 16 - Installing Battery in Receiver

Receiver

Installing 9-Volt Battery in Hand-Held Remote Control Unit

1. Remove battery cover on back of remote control unit.

2. Attach terminal wires to the battery (not included). Place battery into the battery housing.

3. Replace battery cover onto remote control unit.

Battery Cover

Terminal

Wires 9-Volt Battery

Note:

Only use alkaline battery .

Remote Control Unit

GAS LINE HOOK-UP

WARNING: Gas line hookup should be done by

your gas supplier or a qualified service person.

WARNING: Before you proceed, make sure your

gas supply is OFF.

A manual shutoff valve has been included in the appliance’s gas supply system. You may consider installing an extra gas shutoff valve outside the appliance’s enclosure (check with local codes) where it can be accessed more conveniently with a key through a wall as shown in Figure 18.

In conformance with local codes, route a 1/2" NPT gas line to the appliance through hole in left side of firebox or sub-floor as shown in Figure 19.

CAUTION: Do not kink flexible gas line.

Typical Exterior Wall Gas Shutoff Installation

Key

Figure 18 - Manual Shutoff Valve Installation

1/2" NPT Incoming Black Iron Gas Line

Shutoff Valve

Extension

Battery Housing

Figure 17 - Installing Battery in Hand-Held Remote Control Unit

For more information, visit www.desatech.com

Alternate Gas Supply Through Sub-Floor

M36(B,H)/VM36(B,H) M42(B,H)/VM42(B,H)

Figure 19 - Routing Incoming Gas Line

/8" (219mm) 10 1/2" (267mm)

108795-01K

INSTALLATION

0.5"

Continued

Gas Line Hook-Up (Cont.)

INSTALLATION

Ember and Pan Material Placement

DESA recommends that a black iron gas line be routed from the gas source, through a sediment trap (shown in Figure 20), and into the appliance, Once connected through the appliance, a flexible gas line may be used for ease of installation to gas control valve (see Figure 21).

Before connecting the black iron gas line to the inside of the appliance a sediment trap must be included outside the appliance between the gas line and the gas shutoff valve. It must extend down three (3) inches beyond the center of the pipe. Prepare incoming black iron gas line with teflon tape or pipe joint compound (Check with local building codes).

CAUTION: Compounds used on threaded joints of gas piping shall be resistant to the action of Liquefied Petroleum (LP or propane), and should be applied lightly to ensure excess sealant does not enter the gas line.

WARNING: All gas piping and connections must be tested for leaks after the installation is completed.

After ensuring that the gas valve is on, apply a commercial leak detection solution to all connections and joints. If bubbles appear, leaks can be detected and corrected.

Do not use an open flame for leak testing and do not operate any appliance if a leak is detected.

EMBER AND PAN MATERIAL PLACEMENT

1. Open the bag(s) of vermiculite and fill the entire burner pan until the burner tube is completely covered (see Figure 22).

2. Smooth the pan material just even with edges of the burner pan.

3. Remove the ember material from the bag and flatten small amounts into quarter size pieces and lay on top of the surface of the pan material (see Figure 23).

4. Place just enough to cover the entire surface and leave about a 1/2 inch gap under the lower grate members to allow air to flow (see Figure 24).

Grate

Vermiculite (Pan Material)

Figure 22 - Fill Entire Burner Pan with Vermiculite

Grate

Ember Material

Vermiculite (Pan Material)

Burner Pan

Complete your gas installation by connecting incoming gas line with flexible gas line. Secure tightly with wrench but DO NOT

OVERTIGHTEN.

Incoming 1/2" Gas Line Permitted by Local Codes

Sediment Trap (Not Supplied)

3" Min.

(76mm)

Figure 20 - Sediment Trap

Gas Shutoff Valve

Flexible Gas Line Do NOT Kink

Note:

1/2" NPT Incoming Gas Line

1) Wire Connections Not Shown for Clarity

2) * 1/8" NPT Plugged Tapping

Figure 21 - Connecting Flexible Gas Line to Millivolt Valve

Side Wall

Of Appliance

Red Surface Indicates For Propane/LP Use Only

OFF

IN OUT

Inlet Pressure Tap

Pilot Adj

Outlet Pressure Tap

Figure 23 - Ember Material on Surface of Pan Material (Vermiculite)

Grate

Pan and Ember Material

Burner Pan

Figure 24 - Pan and Ember Material Clearances

108795-01K

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INSTALLATION

Log Placement for M36/VM36 Models

INSTALLATION

Continued

LOG PLACEMENT FOR M36/VM36 MODELS

1. Place small front right log (log 1) on right front of grate as shown in Figure 25.

2. Place large back log (log 2) onto grate making sure notches rest over grate as shown in Figure 25.

3. Place log 3 across logs 1 and 2 aligning pegs on log 3 with holes in logs 1 and 2 (see Figure 26).

4. Place the top of log 4 across the right side of log 2, aligning peg in log 4 with hole in log 2 (Figure 26). Rest the front of log 4 on the grate as shown in Figure 27.

5. Align the peg at top of log 5 with the hole on the top left of log 2 (see Figure 27). Rest the bottom of log 5 on grate as shown in Figure 28.

6. Align peg at the top of log 6 with hole on the front left of log 2 (Figure 27). Rest the bottom of log 6 on grate as shown in Figure 28.

To enhance the look of the hearth you may optionally place the lava rock provided around the front and sides of the burner.

NOTICE: Do not put lava rock inside the burner pan or around the air mixer fitting. Placing lava rock inside the burner pan or blocking the openings of the propane/LP air-mixer could cause performance problems.

Log 4

Log 3

Log 2

Log 1

Figure 26 - Installing Logs 3 and 4

Log 5

Log 6

Log 4

Log 3

Log 2

Figure 25 - Installing Logs 1 and 2

For more information, visit www.desatech.com

Log 1

Figure 27 - Installing Logs 5 and 6

Figure 28 - Logs Installed for M36/VM36 Models

108795-01K

INSTALLATION

Continued

Log Placement for M42/VM42 Models

INSTALLATION

LOG PLACEMENT FOR M42/VM42 MODELS

1. Place log 1A on the front left side of grate. Place log 1B on the front right side of the grate. See Figure 29.

2. Place large back log (log 2) onto grate making sure notches rest over grate. Insert peg on back of log 1A into hole on front left of log 2 (see Figure 29).

3. Place log 3 across log 1A and log 2, aligning peg on log 3 with top left hole on log 2 (see Figure 30).

4. Align peg on log 4 with inside left hole on log 2 (see Figure

30). Log 4 will rest on grate fingers as shown in Figure 31.

5. Align peg on log 5 with the inside right hole on log 2 (see Figure 31). Rest the lower part of log 5 on the log 4 and on grate as shown in Figure 32.

6. Align peg at the top of log 6 with outside right hole on log 2. Fit the peg at the lower part of log 6 into the hole on top of log 1B (see Figures 31 and 32).

To enhance the look of the hearth you may optionally place the lava rock provided around the front and sides of the burner pan.

Log 3

Log 4

Log 1A

Log 2

Log 1B

Figure 30 - Installing Logs 3 and 4

Log 5

Log 4

Log 6

Log 2

Log 1A

Figure 29 - Installing Logs 1A, 1B and 2

Log 2

Log 1B

Figure 31 - Installing Logs 5 and 6

Log 1B

Figure 32 - Logs Installed for M42 /VM42 Models

108795-01K

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INSTALLATION

Combustion Air Kit Model AK4 (Optional) Appliance Enclosure Installing Optional Glass Door Accessory

INSTALLATION

Continued

COMBUSTION AIR KIT MODEL AK4 (OPTIONAL)

The outside air kit may be installed on the left side of the fireplace only. The vent can be installed through any outside wall a minimum of three feet below fireplace termination cap. The handle to operate the damper door for the outside air inlet will be located inside the left “screen pocket” of the firebox (see Figure 33). Pull the handle to open or push to close.

CAUTION: Air inlet ducts are not to terminate in

attic space.

Screen Pocket

Air Kit Handle

Figure 33 - Air Kit Handle Location

APPLIANCE ENCLOSURE

INSTALLING OPTIONAL GLASS DOOR ACCESSORY

CAUTION: Use only glass doors certified for use

with this appliance.

Note:

Glass door may be heavy for some individuals. If this is the

case, please request help from someone else. The M36, VM36, M42 and VM42 B-vent fireplaces are approved

for use with optional bi-fold glass doors (see Accessories, page 29). The glass panels may be ordered and installed anytime after the fireplace installation is complete.

Follow these steps to install left and right panels:

1. With the handle at the bottom, completely fold the panel on its hinges.

2. With the handle facing the center of the firebox opening, insert the lower pivot pin on the glass door panel into the hole in pivot plate on the bottom edge of the fireplace opening (see Figure 35).

3. Keeping the folded door tilted, slide the upper two pins into the guide track found under the upper facial edge of the firebox opening.

4. Tilt the glass assembly fully vertical until the outer pivot pin snaps into the mounting hole in the upper spring clip (see Figure 35).

Slide Top Pin Into Door Track

Spring Clip

Before finishing the enclosure around the appliance, inspect all joints around the outer surround. Any gaps between the nailing flanges and the framing should be sealed with noncombustible insulation or caulking.

If the appliance is mounted on a raised platform, it must be a continuous surface and not on blocks without a solid surface. This will prevent the entry of cold air by means of conduction through the total bottom of the appliance. (see Figure 34).

Side Framing

Caulk Here

Figure 34 - Sealing Between Appliance and Framing

For more information, visit www.desatech.com

Side Framing

Pack Insulation

Insert Pin Into Spring Clip

Insert Bottom Pivot Pin Into Pivot Plate and Swing Door Into Vertical Position

Pivot Plate

Figure 35 - Installing Optional Glass Door

108795-01K

INSTALLATION

Continued

Installing Optional Glass Door Accessory (Cont.)

INSTALLATION

Opening Vent Damper

5. Once the top and bottom pins are secured, unfold the door into the closed position.

6. Repeat the process for the opposite door assembly.

7. T o adjust the doors, slide them partially open. Using a screwdriver, loosen the hold-down screws in the spring clip (see Figure 36) and pivot plate.

8. Close both doors until evenly joined at the middle and note the gap at the outer edges of the face.

9. Reopen one door at a time and retighten the upper and lower hold-down screws.

10. Repeat the process until both doors are evenly joined, spaced and working freely.

CAUTION: The glass panels become very hot while the appliance is operating. Do not attempt to adjust or clean the glass doors until the appliance has fully cooled.

The doors may be removed for replacement or cleaning as follows:

1. Partially open the door and press up on the upper spring clip with a screw driver until the outer top pivot pin is free of the clip.

2. Fully fold the frame assembly and slide the upper edge towards the center of the firebox opening until the guide pins are free of the frame rail (see Figure 37).

Spring Clip

Depress Spring Clip to Release

Pivot Pin Fold Bi-Fold Door After Releasing Spring Clip and Slide Door Out of Upper Track

Figure 37 - Removing Glass Doors

Remove Bottom Pin From Pivot Plate While Sliding Door Out of the Upper Track

Pivot Plate

OPENING VENT DAMPER

Vent damper must be locked in the full open position before operating the fireplace. If vent damper is not open, fireplace will not light.

CAUTION: Always operate the appliance with the doors either fully opened or fully closed. Operating the appliance with the doors partially open can result in improper venting of flue products.

Spring Clip

Side Front Face

Partially Opened Door

Figure 36 - Adjusting Glass Doors

Hold-Down Screw

VENT DAMPER MUST BE LOCKED

IN THE FULL OPEN POSITION

TO OPERATE THE APPLIANCE

Figure 38 - Opening Vent Damper

CLOSEOPEN

108795-01K

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Clockwise

C-clockwise

OPERATING FIREPLACE

For Your Safety Read Before Lighting Lighting Instructions To Turn off Gas to Appliance

OPERATING FIREPLACE

FOR YOUR SAFETY

READ BEFORE LIGHTING

WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

A. This appliance has a pilot which must be lighted by hand.

When lighting the pilot, follow these instructions exactly.

B. BEFORE LIGHTING smell all around the appliance area

for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electric switch; do not use any phone in your building.

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire department.

C. Use only your hand to push in or turn the gas control knob.

Never use tools. If the knob will not push in or turn by hand, don’t try to repair it, call a qualified service technician or gas supplier. Force or attempted repair may result in a fire or explosion.

D. Do not use this appliance if any part has been under water.

Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

LIGHTING

INSTRUCTIONS

NOTICE: During initial operation of new heater, burning logs will give off a paper-burning smell. Orange flame will also be present. Open damper or window to vent smell. This will only last a few hours.

1. STOP! Read the safety information, above.

2. Turn wall switch to the OFF position.

3. Turn off all electric power to the appliance.

4. Fully open glass doors if installed.

5. Remove front refractory brick access panel.

6. T ur n gas control knob clockwise tion (see Figure 39).

7. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor . If y o u s me l l g a s, S T O P ! Foll o w “ B ” in the safety information ab ove. If you don’t smell gas, go to the next step.

8. T urn control knob counter clockwise position.

to the OFF posi-

to the PILOT

9. Push in the knob all the way and hold in. Immediately light the pilot manually . Continue to hold the contr ol knob in f or about (1) minute after the pilot is lit. Release knob and it will pop back up. Pilot should remain lit. If it goes out, repeat steps 5 through 9.

• If knob does not pop up when released, stop and im-

mediately call your service technician or gas supplier.

• If the pilot will not stay lit after se veral tries, turn the gas

control knob to “OFF” and call your service technician or gas supplier.

10. Turn gas control knob counterclockwise

C-clockwise

to “ON”.

Knob can be turned to “ON” only if the control knob is popped out.

11. Replace front refractory brick access panel.

12. Fully close glass doors if installed.

13. Turn on all electric power to the appliance.

Gas Control Knob

Pilot Adjustment

OFF

IN OUT

Position Indicator

Figure 39 - Control Knob in the PILOT position

Screw

TO TURN OFF GAS

TO APPLIANCE

1. Turn off the wall switch.

2. Turn off all electric power to the appliance if service is to be performed.

3. Fully open glass doors if installed.

4. Remove front hearth brick and control access panel.

5. Turn gas control knob clockwise not force.

6. Replace front refractory brick access panel.

7. Fully close glass doors if installed.

Pilot Burner

Ignitor

Figure 40 - Pilot

to “OFF”. Do

Clockwise

Thermopile

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108795-01K

Optional Hand-Held Remote Operation

OPERATING FIREPLACE

To Turn Off Gas to Appliance

INSPECTING BURNERS

Pilot Assembly

Burner Flame Pattern

OPERATING FIREPLACE

Continued

OPTIONAL HAND-HELD

REMOTE OPERATION

Note:

The receiver and hand-held remote control kit must be purchased separately (see Accessories, page 29). Follow installation instr u c t i o n s o n p ag e s 11 and 12 of t hi s manual.

1. After lighting, let pilot flame burn for about one minute.

T urn contr ol knob to ON position. Slide the selector switch to the REMOTE position. hand-held remote was on when selector switch was last turned off. You can now turn the burner on and off with the hand-held remote control unit.

IMPORTANT:

MOTE or ON position when the pilot is not lit. This will drain the battery.

2. Press the control button on the hand-held remote to turn

the burner on. Press the contr ol button again to turn b urner off (see Figure 41).

3. To Lock press both buttons on remote control until light

stops flashing. Remote is now locked. If the fir e is on it will be turned off automatically. In the locked state, the light will not light up when any button is pressed.

4. To Unlock press both buttons together on remote control

until light stops flashing. The remote is now unlocked.

Do not leave the selector switch in the RE-

Note:

The burner may light if

Control Button Turns Burners On and Off

INSPECTING BURNERS

Check pilot flame pattern and burner flame patterns often.

PILOT ASSEMBLY

The pilot assembly is factory preset for the proper flame height. Alterations may have occurred during shipping and handling. The pilot is located on the back right hand side of the burner.

The height of the thermopile must be 3/8" to 1/2" above the pilot flame. The flame from the pilot burner must extend beyond the thermopile.

If your pilot assembly does not meet these requirements:

• Turn the adjustment screw marked pilot clockwise to decrease or counterclockwise to increase the flame to proper size (see Figure 39, page 18). Do not remove the adjustment screw.

• see Troubleshooting, pages 21 through 23

Thermopile

Pilot Burner

Ignitor

Figure 42 - Correct Pilot Flame Pattern

BURNER FLAME PATTERN

Figure 41 - On/Off Hand-Held Remote Control Unit GHRCB

TO TURN OFF GAS

TO APPLIANCE

Shutting Off Heater

Press in and turn control knob clockwise position.

Shutting Off Burner Only (pilot stays lit)

Turn remote control wall switch to the OFF position.

For more information, visit www.desatech.com

108795-01K

Clockwise

to the OFF

Burner flames will be steady; not lifting or floating. Flames should go up through the middle of logset. Flames should not "spill" to the edges of the pan or sides of the logset.

Figure 43 shows a typical flame pattern. If burner flame pattern differs from that described:

• turn appliance off (see To Turn Off Gas to Appliance, column 1)

• see Troubleshooting, pages 21 through 23

Figure 43 - Typical Flame Pattern

CLEANING AND MAINTENANCE SERVICE HINTS TECHNICAL SERVICE WIRING DIAGRAM REPLACEMENT PARTS

CLEANING AND MAINTENANCE

WARNING: Installation and repair should be done by a qualified service person. The appliance should be inspected before each use and at least annually by a qualified service person. More frequent cleaning may be required due to excessive lint from carpeting, bedding material, pet hair, etc. It is imperative that the control compartments, burners, and circulating air system be kept clean.

WARNING: The logs can be hot. Handle only when cool.

WARNING: Turn off gas and electrical power before servicing appliance.

WARNING: Failure to keep the primary air opening(s) of the burner(s) clean may result in sooting and property damage.

PILOT AND BURNER

• Remove logs and ember material before cleaning burner and replace when cleaning is complete.

• Burner and controls should be cleaned with compressed air to remove dust, dirt, or lint.

• Use a vacuum cleaner or small, soft bristled brush to remove excess dust, dirt, or lint.

LOGS

• If you remove logs for cleaning, refer to log placement information on pages 14 and 15 to properly replace logs.

• Use a vacuum cleaner to remove any carbon buildup on logs.

• Replace log(s) if broken. See Replacement Parts.

• Replace ember material periodically as needed. See Replace- ment Parts.

SERVICE HINTS

When Gas Pressure Is Too Low

• pilot will not stay lit

• burner will have delayed ignition

• fireplace will not produce specified heat

• propane/LP gas supply may be low if using propane/LP gas

If using propane/LP gas, you may feel your gas pressure is too low. If so, contact your local propane/LP gas supplier.

TECHNICAL SERVICE

You may have further questions about installation, operation, or troubleshooting. If so, contact DESA’s Technical Service Department at 1-866-672-6040. When calling please have your model and serial numbers of your heater ready.

You can also visit DESA’s Technical Services web site at

www.desatech.com.

WIRING DIAGRAM

PILOT BURNER

PILOT GAS LINE

INCOMING MAIN GAS SUPPLY

IGNITOR

THERMOPILE

PILOT SAFETY WIRE

REPLACE FACTORY WIRING WITH 105¡C EQUIVALENT OR HIGHER RATING

EXTERNAL WIRING USE ONLY CLASS 2 THERMOSTAT WIRE 18 GA. RED/WHITE

DO NOT

CONNECT

N.O. SW

MANUAL DAMPER SWITCH

TO 120V

RED

WHITE

TH TP TH/TP

WALL SWITCH

(SUPPLIED)

N.C.SW

(VENT SAFETY SHUTOFF SWITCH)

REPLACEMENT PARTS

Note:

Use only original replacement parts. This will protect your

warranty coverage for parts replaced under warranty.

PARTS UNDER WARRANTY

Contact authorized dealers of this product. If they can’t supply original replacement part(s) call DESA’s Technical Service Department at 1-866-672-6040 for referral information.

When calling DESA, have ready

• your name

• your address

• model and serial numbers of your fireplace

• how fireplace was malfunctioning

• type of gas used (propane/LP or natural gas)

• purchase date Usually, we will ask you to return the part to the factory.

PARTS NOT UNDER WARRANTY

Contact authorized dealers of this product. If they can’t supply original replacement part(s) call DESA at 1-866-672-6040 for referral information.

When calling DESA, have ready

• model number of your fireplace

• the replacement part number

For more information, visit www.desatech.com

108795-01K

TROUBLESHOOTING

Note:

For additional help, visit DESA’s Technical Service web

site at www.desatech.com.

Note:

Before troubleshooting the system, make sure the gas shutoff

valve is ON.

OBSERVED PROBLEM

Pilot will not light

Pilot will not stay lit

POSSIBLE CAUSE

1. No gas supply, or shutoff valve is OFF

2. Air in gas line

3. Construction debris clogging pilot orifice

4. Low gas pressure

5. Control valve knob is not on the PILOT position

6. Kinked pilot line

7. Bad valve

8. Vent damper not fully open

1. Loose wiring on thermopile to regulator valve. No millivolt current is being sent back to regulator

2. If valve knob and wall switch are in the ON position, probable defective regulator valve

3. Vent damper not fully open

The two most common causes of a malfunctioning gas appliance are:

1. Loose wiring connections

2. Construction debris clogging the pilot and/or gas control valve filter

REMEDY

1. Check to see if you have gas supply

2. Hold regulator control valve in the PILOT position for 2 to 3 minutes to purge air . If you smell gas stop and wait for a few minutes before trying to light the fireplace

3. Remove debris and dirt, inspect and clean any other possible obstructions

4. Contact your gas supplier

5. Refer to section on pilot lighting

6. Have a qualified technician replace pilot line

7. Replace regulator valve (see Accesso- ries, page 29)

8. Open vent damper until fully locked in OPEN position

1. Check wiring connections. Refer to wiring diagram shown in Wall Switch In- stallation, page 11

2. Have a qualified technician replace valve

3. Open vent damper until fully locked in OPEN position

No gas to burner, although wall switch and valve are set to the ON position

Frequent pilot outage

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108795-01K

1. Wall switch wires defective or too long

2. Thermopile not generating sufficient voltage

1. Pilot flame may be too low, causing safety pilot to “drop out”

2. Improper venting or excessive blockage

1. Check electrical connections

2. See Pilot will not stay lit, above

1. Clean and adjust pilot flame for maximum flame impingement on thermopile

2. Have the vent system inspected, including the termination cap. Remove any restriction or obstruction

TROUBLESHOOTING

Continued

OBSERVED PROBLEM

Pilot goes out when wall switch is ON

Spark ignitor will not light pilot after repeated triggering of red button

POSSIBLE CAUSE

1. Millivolt output on thermopile too high

1. Defective ignitor (no spark at electrode)

2. Defective pilot or misaligned electrode at pilot (spark at electrode)

3. No gas or low gas pressure

4. If using propane/LP gas, no propane/LP gas in tank

REMEDY

1. Replace thermopile

1. Check for spark at the electrode and pilot; if no spark and electrode wire is properly connected, replace ignitor

2. Using a match, light pilot. If pilot lights, turn off pilot and trigger the red button again. If pilot lights, an improper gas/air mixture caused the improper lighting and a longer purge period is recommended. If pilot will not light, check gap at electrode and pilot. Gap should be 1/8" to have a strong spark. If okay , replace pilot

3. A) Check remote shut off valves from

fireplace. Usually there is a valve near the fireplace and sometimes there is a valve near the main. There can be more than one (1) valve between the fireplace and main

B) Low pressure can be caused by a va-

riety of situations such as bent line, too narrow diameter of pipe, or even low line pressure. Check for kinked lines. If none, consult with plumber or gas supplier

4. Check propane/LP supply and contact local propane/LP supplier

For more information, visit www.desatech.com

108795-01K

TROUBLESHOOTING

Continued

WARNING: If you smell gas

• Shut off gas supply.

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your

building.

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire department.

TROUBLESHOOTING

IMPORTANT:

supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles, etc., create fumes. These fumes may mix with combustion air and create odors.

Operating fireplace where impurities in air exist may create odors. Cleaning

OBSERVED PROBLEM

Fireplace produces a clicking/ticking noise just after burner is lit or shut off

Fireplace produces unwanted odors

Gas odor even when control knob is in OFF position

Gas odor during combustion

POSSIBLE CAUSE

1. Metal expanding while heating or contracting while cooling

1. Fireplace burning vapors from paint, hair spray, glues, etc. (See statement above)

2. For propane/LP gas, low fuel supply

3. Gas leak. See Warning statement at

top of page

1. Gas leak. See Warning statement at top of page

2. Control valve defective

1. Foreign matter between control valve and burner

2. Gas leak. See Warning statement at

top of page

IMPORTANT

REMEDY

1. This is common with most fireplaces. If noise is excessive, contact qualified service person

1. Ventilate room. Stop using odor causing products while fireplace is running

2. Contact local propane/LP supplier

3. Locate and correct all leaks (see Gas Line Hook-Up, pages 12 and 13)

1. Locate and correct all leaks (see Gas Line Hook-Up, pages 12 and 13)

2. Replace control valve

1. Take apart gas tubing and remove foreign matter

2. Locate and correct all leaks (see Gas Line Hook-Up, pages 12 and 13)

Dark residue on logs or inside of fireplace

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108795-01K

1. Improper log placement

2. Air holes at burner inlet blocked

3. Burner flame holes blocked

4. Improper venting or excessive blockage

5. Excessive amounts of embers and pan material

1. Properly locate logs

2. Clean out air holes at burner inlets. Periodically repeat as needed

3. Remove blockage or replace burner

4. Have the vent system inspected, including the termination cap. Remove any restrictions or obstruction

5. Clear excess embers until a minimum gap of 1/2" remains under the grate

ILLUSTRATED PARTS BREAKDOWN

Models M36(B,H), M42(B,H), VM42(B,H) and VM42(B,H)

ILLUSTRATED PARTS BREAKDOWN

MODELS M36(B,H), M42(B,H), VM36(B,H)

AND VM42(B,H)

37(LP)

59/60

For more information, visit www.desatech.com

108795-01K

Models M36(B,H), M42(B,H), VM42(B,H) and VM42(B,H)

PARTS LIST

KEY M36(B,H) M42(B,H) NO. VM36(B,H) VM42(B,H) DESCRIPTION QTY.

1 14153 14153 Micro Switch 1 2 ** ** Insulation Pan 1 3 ** ** Fireplace Top Assembly 1 4 ** ** Fireplace Surround 1 5 106642-01 106642-01 Air Rod Retainer 1 6 106643-01 106643-01 Damper Rod Retainer 1 7 106651-01 107805-01 Panel Closure 2 8 ** ** Firebox Bottom 1 9 ** ** Firebox Surround 1 10 106657-02 107811-02 Air Separator 1 11 11408 11408 Bushing 2 12 106658-02 107812-02 Left Refractory, Std. Brick

108164-02 108169-02 Left Refractory, Herringbone 106658-01 107812-01 Left Refractory, Std. Brick 108164-01 108169-01 Left Refractory, Herringbone

13 106659-02 107814-02 Right Refractory, Std. Brick

108165-02 108170-02 Right Refractory, Herringbone 106659-01 107814-01 Right Refractory, Std. Brick 108165-01 108170-01 Right Refractory, Herringbone

14 106660-02 107816-02 Rear Refractory, Std. Brick

108166-02 108171-02 Rear Refractory, Herringbone 106660-01 107816-01 Rear Refractory, Std. Brick 108166-01 108171-01 Rear Refractory, Herringbone

15 106661-02 107818-02 Bottom Rear Refractory, Std.

108167-02 108172-02 Bottom Rear Refractory, 106661-01 107818-01 Bottom Rear Refractory,

108167-01 108172-01 Bottom Rear Refractory,

16 106662-02 107820-02 Bottom Front Refractory,

108168-02 108173-02 Bottom Front Refractory, 106662-01 107820-01 Bottom Front Refractory,

108168-01 108173-01 Bottom Front Refractory,

17 ** ** Firebox Support Leg 2

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 20 of this manual.

(M36B/M42B) 1 (M36H/M42H) 1 (VM36B/VM42B) 1 (VM36H/VM42H) 1 (M36B/M42B) 1 (M36H/M42H) 1 (VM36B/VM42B) 1 (VM36H/VM42H) 1 (M36B/M42B) 1 (M36H/M42H) 1 (VM36B/VM42B) 1 (VM36H/VM42H) 1

Brick (M36/M42, M36B/M42B) Herringbone (M36H/M42H) 1 Std. Brick (VM36/VM42,

VM36B/VM42B) 1

Herringbone (VM36H/VM42H) Std. Brick (M36/M42,

M36B/M42B) 1 Herringbone (M36H/M42H) 1 Std. Brick (VM36/VM42,

VM36B/VM42B) 1 Herringbone (VM36H/VM42H) 1

** Not a field replaceable part.

KEY M36(B,H) M42(B,H) NO. VM36(B,H) VM42(B,H) DESCRIPTION QTY.

18 106687-01 106887-02 Damper Can Collar 1 19 106691-01 107839-01 Screen Rod 2 20 ** ** Firebox Top Assembly 1 21 106699-01 106699-01 Transition 6" B-Vent Collar 1 22 106703-01 106703-01 Air Kit Door Assembly 1 23 ** ** Firebox Face 1 24 106948-02 107823-02 Smoke Deflector 1 25 ** ** Fireplace Top Insulation 1 26 107796-01 107796-02 Grate Assembly 1 27 107742-01 107742-02 Burner Pan 1 28 107795-01 107831-01 Burner Tube 1 29 107748-01 107748-01 Burner Bracket 1 30 107985-01 107985-02 Pilot Shield 1 31 901681-01 901681-01 Burner Clamp 1 32 11209 11209 Nut, #10-24 1 33 11147 11147 Screw, #10-24x1/2 1 34 901066-01 901066-01 Brass Air Mixer (NG) 1

901066-02 901066-02 Brass Air Mixer (LP) 1

35 901064-03 901064-08 Orifice (NG) 1

901065-13 901065-12 Orifice (LP) 1 36 108084-01 108084-01 Pilot - Natural Gas 1 37 108085-01 108085-01 Pilot Orifice (LP) 1 38 11102 11102 Screw, #8-32x3/8 2 39 14512 14512 Gas Control Valve (NG) 1

14513 14513 Gas Control Valve (LP) 1 40 107741-01 107741-01 Valve Bracket 1 41 14261 14261 Piezo Ignitor 1 42 111288-02 111288-02 Manual Valve with Flex Hose 1 43 108769-01 108769-02 Extension Deflector 2 44 108005-01 108005-01 Wire Harness 1 45 108005-02 108005-02 Wire Harness 1 46 11418 11418 Push-On Nut 2 47 12105 107840-01 Screen 2 48 14123 14123 Strain Relief 1 49 14574 106543-01 Limit Switch 1 50 ** ** Collar Insulation 1

51 20023 20488 Starter Collar 1 52 20027 20027 Brick Liner Retainer 2 53 20042 20042 Air Kit Cover 1 54 20088 20088 Door Stop 1 55 20089 20089 Pivot Clip 2 56 20090 20090 Spring Clip 2 57 20280 20280 Top Spacer 4

58 ** ** Gas Knockout Cover 4 59 ** ** Gas Conduit 1 60 ** — Gas Conduit 1 61 22912 22924 Draft Diverter 1 62 24353 24353 Box Assembly 1 63 11165 11165

PARTS AVAILABLE NOT SHOWN

901155-01 901155-01 Vermiculite Bag 1

901156-01 901156-01 Pan Material 1

901157-01 901157-01 Lava Rock 1

22180 22180 Wall Switch Kit 1

Screw, #10x5/8 Mod. Tr. Blk. Ox

108795-01K

For more information, visit www.desatech.com

Logsets for Models M36(B,H), M42(B,H), VM42(B,H) and VM42(B,H)

ILLUSTRATED PARTS BREAKDOWN

LOGSETS FOR MODELS M36(B,H), M42(B,H), VM36(B,H) AND

VM42(B,H)

ILLUSTRATED PARTS BREAKDOWN

Logset for M36(B, H)/VM36(B, H) Models

KEY PART NO. NUMBER DESCRIPTION QTY.

- 107999-01 Log Set 1 108724-01 Right Front 9" Split Log 1 2 901098-01 Rear Log 1 3 108720-01 Top Right Log - 11 4 108721-01 Top Right Log - 16" 1 5 108722-01 Top Left Log - 13 6 108723-01 Top Left Log - 11" 1

/4"1

/2" Y-Log 1

Logset for M42(B, H)/VM42(B, H) Models

KEY PART NO. NUMBER DESCRIPTION QTY.

- 107999-02 Log Set 1A 108723-01 Left Front Log - 11" 1 1B 108839-01 Right Front Log - 15 3/4" Round 1 2 901098-02 Rear Log 1 3 108722-01 Top Left Log - 13 4 108838-01 Inside Top Left Log - 15 5 108721-01 Inside Top Right Log - 16" 1 6 108720-01 Top Right Log - 11

/2" Y-Log 1

/4" Split 1

/4"1

For more information, visit www.desatech.com

108795-01K

OWNER'S REGISTRATION FORM

In order to provide better customer service for this and future purchases, we recommend that you register your product with us. You can register online at www.desatech.com. If access to our website is not available to you, please complete this Owner’s Registration Form and mail to the address on the back of this owner’s manual. Please provide the following product information:

Brand: Model: Date Purchased: Serial Number: First Name: Last Name: Address: City: State: Zip: Country: Home Phone: ( ) - E-Mail:

Please answer the following questions to register your product with DESA:

1. Where will the product be used? ❍ Living/Family Room ❍ Office/Warehouse ❍ Utility Shed/Outbuilding ❍ Garage ❍ Bedroom ❍ Bathroom ❍ Other

2. If you bought this product yourself, did you plan to purchase this type of product before going into the store? ❍ Yes ❍ No

3. Who selected the product? ❍ Male ❍ Female ❍ Both

4. What is the population of your area? ❍ Under 10,000 ❍ 10,000 to 25,000 ❍ 25,000 to 50,000 ❍ 50,000 to 100,000 ❍ 100,000 to 250,000 ❍ Over 250,000

5. What is your primary source of heat? ❍ Propane (LP Gas) ❍ Fuel Oil ❍ Wood ❍ Natural Gas ❍ Electric ❍ Other

6. How was the product installed? ❍ Professional Installer ❍ Self ❍ Other

7. Cost of product excluding sales tax? $___________________

8. Cost to install product? $____________________

9. Type of store where product was purchased? ❍ Hardware ❍ Propane Dealer ❍ Natural Gas/Utility Co. ❍ Home Center/Builder’s Supply ❍ Fireplace or Hearth Shop ❍ Farm Store ❍ Other

10. What motivated you to buy this product? ❍ Sudden Cold Weather ❍ Replace Older Model ❍ D.I.Y. Home Project ❍ Emergency Back-Up Heat ❍ Heater was on Sale ❍ Energy Savings/High Efficiency ❍ Construction Project ❍ Other

11. How did you learn about this product brand? ❍ Advertising ❍ Relative or Friend ❍ Store Display ❍ Other ________________________

12. Level of Education of Purchaser: ❍ Some High School ❍ Completed High School ❍ Completed College ❍ Completed Graduate School

13. Age of Purchaser: ❍ Under 20 ❍ 20 - 29 ❍ 30 - 39 ❍ 40 - 49 ❍ 50 - 59 ❍ 60 or Over

14. Buyer’s total annual household income: ❍ Under $15,000 ❍ $15,000 to $19,999 ❍ $20,000 to $34,999 ❍ $35,000 to $49,999 ❍ $50,000 to $74,999 ❍ $75,000 to $99,999 ❍ $100,000 and Over

15. Store where product was purchased: Name: ______________________________________ City: _______________________ State: __________

16. In choosing this product, how important were the following:

Availability Price Brand Name Overall Quality Heat Output Made in USA Warranty Local Service Value for Price Prior Brand Experience Controls Location Thermostat, Remote, or Manual Operation Ease of Operation Special Features Salesperson’s Recommendation Friend/Relative’s Recommendation Portability

108795-01K

Quiet Operation

For more information, visit www.desatech.com

Not Important Somewhat Important Very Important

(Comfort Glow, Vanguard, etc.) (EFP33PR, VTGH33NR, etc.)

Note:

Keep receipt for warranty verification.

7 or 9 digit number located on product or identification tag.

❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍

TAPE

2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004

Postage

Required

For more information, visit www.desatech.com

TAPE

108795-01K

ACCESSORIES

NOTICE: All accessories may not be available for all fireplace models.

Purchase these firebox accessories from your local dealer. If they can not supply these accessories, call DESA’s Sales Department at 1-866-672-6040 for information. You can also write -to the address listed on the back page of this manual.

AIR KIT - AK4

Optional kit helps offset the negative pressure often existing in today's tightly constructed homes.

REMOTE CONTROL KITS

RC - Standard On/Off Millivolt Remote Control Kit GHRCB - Hand-Held Remote Control Kit GWMT1 - Wall-Mount Remote Control Kit

PROPANE CONVERSION KITS

PCBM-36 - Propane Conversion Kit for 36" B-Vent Millivolt

Fireplace PCBM-42 - Propane Conversion Kit for 42" B-Vent Millivolt Fireplace

EXTRUDED ALUMINUM BI-FOLD GLASS DOORS

BD36 - 36" Black Finish BD36B - 36" Brushed Brass Finish BD36P - 36" Platinum Finish BD42 - 42" Black Finish BD42B - 42" Brushed Brass Finish BD42P - 42" Platinum Finish

BRICK LINER

(For M36(B,H) and M42(B,H)

BL36 - 36" Refractory Standard Brick Liner Kit BL42 - 42" Refractory Standard Brick Liner Kit BL36H - 36" Refractory Herringbone Brick Liner Kit BL42H - 42" Refractory Herringbone Brick Liner Kit

BLOWER KIT

BK - Squirrel Cage Blower With Speed Control BK3E - Triple Fan Blower System

PERIMETER TRIM

PT36 - 36" Perimeter Trim - Black PT36B - 36" Perimeter Trim - Brushed Brass PT36PB - 36" Perimeter Trim - Polished Brass PT36P - 36" Perimeter Trim - Platinum PT42 - 42" Perimeter Trim - Black PT42B - 42" Perimeter Trim - Brushed Brass PT42PB - 42" Perimeter Trim - Polished Brass PT42P - 42" Perimeter Trim - Platinum

LOUVER TRIM (Rolled Louvers Only)

LT36B - 36" Louver Trim Kit - Brushed Brass LT36P - 36" Louver Trim Kit - Platinum LT36PB - 36" Louver Trim Kit for VM36(B,H) - Polished Brass LT42B - 42" Louver Trim Kit - Brushed Brass LT42P - 42" Louver Trim Kit - Platinum LT36PB - 42" Louver Trim Kit for VM42(B,H) - Polished Brass

FACE/LOUVER PANEL KITS

SP36, SP42 - Smooth Faced Panel Kit- Black SL36, SL42 - Stamped Louver Panel Kit- Black RL36, RL42 - Rolled Louver Kit- Black FP36, FP42 - Filigree Panel Kit- Black FP36B, FP42B - Filigree Panel Kit- Brushed Brass FP36P, FP42P - Filigree Panel Kit- Platinum FP36PB, FP42PB - Filigree Panel Kit- Polished Brass

FIRE CRACKLE - CF6-A

Creates the sound of a real burning fire.

(For VM36(B,H) and VM42(B,H)

BL36S - 36" Refractory Standard Brick Liner Kit BL42S - 42" Refractory Standard Brick Liner Kit BL36HS - 36" Refractory Herringbone Brick Liner Kit BL42HS - 42" Refractory Herringbone Brick Liner Kit

For more information, visit www.desatech.com

108795-01K

WARRANTY INFORMATION

KEEP THIS WARRANTY

Model Serial No. Date Purchased

Always specify model and serial numbers when communicating with the factory. We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written warranty. We make

no other warranty, expressed or implied.

LIMITED WARRANTY B-VENT FIREPLACE

DESA warrants this product to be free from defects in materials and components for four (4) years from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions. To make a claim under this warranty the Bill of Sale or cancelled check must be presented.

This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required to restore this heater to proper operating condition and an allowance for labor when provided by a DESA Authorized Service Center. Warranty part(s) MUST be obtained through authorized dealers of this product and/or DESA who will provide original factory replacement parts. Failure to use original factory replacement parts voids this warranty. The heater MUST be installed by a qualified installer in accordance with all local codes and instructions furnished with the unit.

This warranty does not apply to parts that are not in original condition because of normal wear and tear, or parts that fail or become damaged as a result of misuse, accidents, lack of proper maintenance or defects caused by improper installation. Travel, diagnostic cost, labor, transportation and any and all such other costs related to repairing a defective heater will be the responsibility of the owner.

TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE PRODUCT; THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO FOUR (4) YEARS ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE; AND DESA'S LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.

Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or consequential damages, so the above limitation on implied warranties, or exclusion or limitation on damages may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights that vary from state to state. For information about this warranty write:

2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004

www.desatech.com

108795 01

NOT A UPC

For more information, visit www.desatech.com

108795-01 Rev. K 06/03

108795-01K

Desa AND VM42 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual