Desa M36, M42, VM36, VM42 User Manual

0 (0)

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 flammable 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.

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2

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

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

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 completelybeforetryingtoassemble,operate,orservice this fireplace. Improper use of this fireplace can cause serious injury or death from burns, fire, explosions, electrical shock, and carbon monoxide poisoning.

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.

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.

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.

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.

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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 3

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.

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

8.Turn fireplace off and let cool before servicing or repairing. • Three (3) plastic bags containing lava rock, pan and ember

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 Canadian 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.

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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108795-01H

INTRODUCTION

4 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 combination 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 2.222000 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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Desa M36, M42, VM36, VM42 User Manual

PRODUCT SPECIFICATIONS

 

 

A

For Use With

 

 

6"Ø Type B-1

 

 

Vent Pipe Only

 

E

 

 

Stand Off

 

D

Collar

7"

 

 

B

C

 

 

 

7"

Alternate

 

Gas Supply

 

 

 

 

Inlet

 

X

 

 

 

K

 

Outside Air

I

 

Kit Location

 

(Optional)

J

 

 

R

S T

7"

P

 

L

Q

 

M

PRODUCT SPECIFICATIONS

5

F

HEARTH AREA

H

DIMENSIONS

G

Glass Door

1.5"

13.5"

(Optional)

 

N O

W

V

 

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 1/2"

H

15 3/4" (16 3/4" w/o Brick)

17 3/4" (18 3/4" w/o Brick)

T

8 1/8"

8 1/8"

I

40 1/4"

44 1/4"

U

11"

12 3/4"

J

21"

24"

V

7"

7"

K

8"

9"

W

2 1/4"

2 1/4"

L

34 3/4"

42"

X

5"

4 1/2"

Figure 1 - Appliance Dimensions

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6

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 insulationoranyothermaterial.Donotobstructeffective opening of appliance with any type of facing material.

2 x 4 Stud

Nailing

Flange

Back

0" Clearance

Left Side

Surround

0"

 

CORNER

 

 

INTERNAL WALL

INSTALLATION

Front Face

Drywall

INSTALLATION

 

 

 

 

 

 

Figure 3 - Minimum Clearances (Top View)

 

 

1" (25mm) Min.

 

 

Clearance to

 

 

"B" Vent’s Outer Pipe

FULL

FLUSH

Ceiling

 

INSTALLATION

 

 

PROJECTION

 

 

 

42" (1067mm)

 

INSTALLATION

 

 

 

Min. Clearance

Maintain 2" (51mm) Min.

 

 

from Opening to

Clearance to the Transition

 

 

Ceiling

Pipe as Measured at the

 

 

0" Clearance

Outer Vent Collar

Figure 2 - Possible Locations for Installing Appliance

*

*

*

*

Required Air

 

 

 

 

Spaces are

 

 

 

 

Indicated with

 

 

 

 

an "*". Do Not

 

 

 

 

Pack with

 

 

 

 

Insulation or Any

 

DO NOT BLOCK

 

Other Material

 

 

 

 

OR OBSTRUCT

 

 

 

 

OPENINGS

 

 

0" Clearance to Combustible or Noncombustible Flooring

Figure 4 - Minimum Clearances (Front View)

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PRE-INSTALLATION PREPARATION

7

Mantel Clearances and Wall Details

PRE-INSTALLATION

PREPARATION

Continued

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.

12"

Combustible

(229mm)

Materials

Header

6" (152mm)

TOP VIEW

Outer Surround

Combustible

Material May

Be Used

1 1/2" (38mm)

SAFE

ZONE

Max.

3" (76mm)

 

 

 

 

Max.

 

6" (152mm) Max.

A

 

Perpendicular

B

Wall

 

A

 

 

M36(B,H)

M42(B,H)

 

B

Spacer

 

VM36(B,H)

VM42(B,H)

 

A

9" (229mm)

6" (152mm)

 

 

 

 

 

 

B

12" (305mm)

9" (229mm)

 

3" (76mm)

 

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

 

 

 

 

1 1/2"

 

 

 

 

 

(38mm) Max.

 

 

 

 

 

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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8

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.

A

B

C

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

D

C

A

3/4" Clearance

Not Required

 

 

 

 

at Nailing

 

 

Flanges

 

 

B

 

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.

B-Vent Piping

Starter Collar

 

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

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

 

A

40 3/8" (1020mm)

44 3/8" (1121mm)

Transition Pipe

B

21 3/8" (543mm)

23 1/8" (587mm)

 

C

41 1/4" (1048mm)

48 1/4" (1226mm)

 

 

 

 

Vent Collar

Figure 7 - Rough Opening for Installing in Wall

 

 

 

 

Figure 9 - Installing Transition Pipe and Starter Collar

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VENTING INSTALLATION

9

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.

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.

 

 

Listed

 

 

 

 

 

 

 

Vent Cap

 

 

Listed

Listed

 

 

 

 

 

Vent Cap

 

 

 

 

 

Vent Cap

 

 

 

 

 

 

 

Maintain

 

Maintain

 

 

 

 

 

 

Listed

 

 

 

Maintain

 

Listed

 

 

 

 

 

 

Clearance

 

Maintain

 

Listed

 

Clearance

 

 

 

 

 

Support Each

 

Listed

 

Clearance

 

 

 

 

 

 

 

 

Lateral At

 

Clearance

 

 

 

 

 

Least Every

45°

 

 

 

 

 

60°

Six (6) Feet

12' Min.

 

 

 

 

 

 

 

 

 

8'

 

 

 

45°

10'

 

6'

 

 

 

12' Min.

Position

 

45°

Position

 

12' Min.

 

Position

 

 

Firestop

 

Firestop

 

Firestop

 

 

 

 

 

 

 

 

 

 

Maintain

 

Maintain

 

 

Maintain

 

 

Listed

 

Listed

 

 

Listed

 

 

Clearance

 

Clearance

 

 

Clearance

EXAMPLE 1

EXAMPLE 2

EXAMPLE 3

Figure 10 - Typical B-Vent Configuration

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