Desa M36, 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* 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

OPERA TING FIREPLACE ........................................................ 18

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

SAFETY INFORMATION

WARNINGS

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.

WARNING: Any change to this fireplace or its

controls can be dangerous.

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

ACCESSORIES ........................................................................ 27

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

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.

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.

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108795-01E

SAFETY INFORMATION

UNPACKING

SAFETY INFORMATION

Continued

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 27.

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: # 50 # 47

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108795-01E

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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108795-01E

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 may be installed from either side or from the bottom of the appliance (see Figure 19, page 12).

4. Feed flexible gas line through one of three gas line conduit sleeve and repack insulation to cover any openings. 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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Figure 9 - Installing Transition Pipe and Starter Collar

B-Vent Piping

Starter Collar

Transition Pipe

Vent 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 60° 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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108795-01E

Maintain Listed Clearance

EXAMPLE 3EXAMPLE 2EXAMPLE 1

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