Monessen Hearth HWB600 User manual

HWB600/HWB600HB MODELS

INSTALLATION, OPERATION AND MAINTENANCE MANUAL

FOR RESIDENTIAL INSTALLATION

THIS FIREPLACE IS U.L. LISTED FOR USE WITH

THE "L" SERIES CHIMNEY SYSTEM COMPONENTS.

53D9035. Rev 1 03/03

ONLY UNVENTED GAS LOG SETS WHICH HAVE BEEN FOUND TO COMPLY WITH THE STANDARD FOR UNVENTED ROOM

HEATER, ANSI/IAS/AGA Z21.11.2, ARE TO BE INSTALLED IN THIS FIREPLACE.

WHEN AN APPROVED ANSI/ISA/AGA Z21.11.2 UNVENTED ROOM HEATER IS INSTALLED IN THIS FIREPLACE, AN H2853

CANOPY MUST ALSO BE INSTALLED.

WARNING: DO NOT OPERATE AN UNVENTED GAS LOG SET IN THIS FIREPLACE WITH THE CHIMNEY REMOVED.

You have chosen the finest wood burning fireplace available. Your fireplace has been designed for

years of heating and viewing enjoyment. Please take time to read this entire manual before installing

or operating your fireplace.

LISTING AND CODE APPROVALS

The instructions contained in this manual provide the information necessary to install this fireplace in accordance

with Underwriter’s Laboratories requirements and in compliance with the National Fire Protection Association

Standard No. 211. Some codes may require the fireplace and chimney be electrically grounded. Before

beginning the installation, you should check with local building officials to obtain required permits and assure

compliance with local regulations and coded. If you encounter problems with code requirements, contact your

dealer for assistance.

These Fireplace models are listed by Underwriters Laboratories, Inc. to U.L. 127-standard for factory-built

fireplaces. The design of this fireplace and these instructions complied with applicable safety standard for a

factory built fireplace in effect at the time the fireplace was manufactured. You should be aware, however, that

failure to install, operate, and maintain this or any other factory built fireplace properly can result in a house fire

or other occurrences that could cause deaths, injuries, and property damages. It is very important that the

persons installing and/or supervising the installation of this fireplace have appropriate skills in using the tools

and techniques required; and reading and comprehension skills sufficient to read and follow these instructions.

These instructions contain warnings, cautions, and notes to emphasize important safety information. To assure

that safe and satisfactory service is received from this fireplace, please read the following special notices and

all the contents of this manual.

TABLE OF CONTENTS

Listing and Code Approvals................................................................................................................1

Important Information..........................................................................................................................2

Operation Guidelines.........................................................................................................................3

Clearances .................................................................................................................4-6

Fireplace Location ................................................................................................................7

Installation Preparation ........................................................................................................8-9

Floor Protection . ...............................................................................................................10-11

Fireplace Components ...................................................................................................12

Fireplace Installation .....................................................................................................13

Chimney Installation .................................................................................................................14-15

Chimney Offset Installation ............................................................................................16-17

Chimney Cap Installation ........................................................................................................18-19

Chimney Cap Chase Installation ......................................................................................................20

Outside Combustion Air Precautions and Recommendations ...............................................21-22

Combustion Air Assembly ................................................................................................................23

Gas Appliance Installation .......................................................................................................24-25

Trim and Door Installation ...............................................................................................................26

Fireplace Operation ................................................................................................................27-28

Maintenance and Safety .........................................................................................................29-31

Repair Parts Diagram and List ................................................. .............................................32-33

Warranty...................................................................................................................................34-35

CONGRATULATIONS!

53D9035. Rev 1 03/03

1. Read these instructions entirely before beginning any part of the installation. Save these instructions for

any future repairs.

2. Use these instructions as a guide during the installation of the fireplace.

3. Be sure these instructions become the property of and are reviewed by all future users of this fireplace to

encourage proper operation and maintenance.

4. All the parts used with this fireplace system must be installed in accordance with these installation instructions.

Failure to do so may be hazardous and will void the warranty.

5. This fireplace and accessories should not be altered in any way that is not specifically recommended in

this manual.

6. Refer to your local building code for local requirements pertaining to installation of factory-built fireplaces.

These fireplaces are intended for installation and use according to standard NFPA NO.211 of the National

Fire Protection Association.

7. This fireplace must not be installed with a masonry flue.

8. This fireplace and chimney should not be used for venting a wood or coal burning heater or fireplace insert.

Warning: Do not install a separate solid fuel insert or gas fireplace insert into this fireplace and chimney

system without written authorization.

9. Warning: Do not pack required air spaces with combustible material or insulation not specifically

recommended for use in such areas.

INTENDED PRODUCT USAGE

The fireplace is designed to sit directly on a combustible floor. The fireplace must be installed with clearances

to combustible building materials specified in this manual. Only parts manufactured by Monessen Hearth

Systems and labeled for use with the fireplace should be used in the installation of this fireplace except for

special roof flashings that may be fabricated locally. The use of improper parts in the installation can be

hazardous and voids the warranty offered by Monessen Hearth Systems.

This fireplace is designed to burn wood. This fireplace is not designed to burn coal, unplumbed liquid fuels,

unplumbed gaseous fuels or household refuse. Any attempt to burn these fuels in the fireplace can be hazardous.

Failure to heed usuage warnings may cause a fire hazard and will void the Warranty. This fireplace is intended

for supplemental heating only and is not intended for use as a primary heating system. For use with Solid

Wood Fuel, UL Classified Processed Solid Fuel Fire Logs, or Certified Decorative Gas Appliance.

“Do not use a fireplace insert or other product not specified for use with this fireplace.”

IMPROPER INSTALLATION

Improper installation or use of this fireplace will void the warranty and can cause:

1. Damage to the fireplace from overheating.

2. Hazardous temperatures to develop on combustible materials adjacent to the fireplace or chimney.

3. The emission of smoke, sparks or hazardous gases into the dwelling.

4. Leakage of rain water into the dwelling.

IMPORTANT INFORMATION

53D9035. Rev 1 03/03

OPERATION GUIDELINES

When a AK4 combustion air assembly and a combustion air duct are attached to the connecting point on the

left of the fireplace, combustion air may enter the firebox through a dampered opening behind the left side

panel. This feature is designed for your benefit to reduce the room air used for combustion and to prevent

excessive loss of heat from the room. When the fireplace is in use, this damper should be open. When the

fireplace is not in use, the damper should be closed to prevent cold air from entering the firebox. The combustion

air damper is open when the lever, located on the left side of the firebox near the top of the left firebrick, is up

and closed when the lever is down.

Outside air for combustion is optional unless required by federal, state or local building codes. See the section

of this manual providing the instructions for installation of the combustion air assembly. The design of the

fireplace allows the routing of the combustion air duct up, down, or horizontally to obtain the outside combustion

air. This permits flexibility in planning your installation. See Figure 25 for typical installation methods. Review

the precautions and recommendations in this manual pertaining to outside combustion air installation.

Glass doors should be installed to receive the maximum benefit from your fireplace. For large fires, the

maximum heating benefit from the fireplace will be obtained with the doors open due to the high amount of

radiant heat being emitted out of the front opening of the fireplace. With a small fire, or before retiring in the

evenings, it is best to operate the fireplace with the doors closed to prevent excessive room air form being

drawn up the chimney. When the doors are open, the mesh screens should be closed to help keep burning

embers from popping out of the firebox.

The fireplace should also be equipped with a flue damper, which must be open when the fireplace is in use.

The flue damper control lever is located inside the fireplace. The counterweighted damper is operated by

simply pushing up to open or pulling down to close the damper. When the fireplace is not in use, the damper

should be closed to prevent cold air form entering the chimney as well as preventing warm air in the room from

escaping up the chimney.

NOTE: It is normal for a small amount of smoke to be released from the upper portion of the fireplace the first

few times you use your new fireplace. This results from an oil residue on the metal. Open a door or window

to allow the smoke to escape.

The grate included with this fireplace helps to appropriately locate and contain the burning wood. Failure to

use this grate may cause overheating of parts of the fireplace and allow large pieces of burning wood to roll

forward out of the firebox. If the grate becomes warped or damaged, it must be replaced with grate number

052874 only.

WARNING: Fireplaces equipped with doors should be operated only with the doors fully open or doors fully

closed. If doors are left partly open, gas and flame may be drawn out of the fireplace opening, creating risks

of both fire and smoke.

All fireplace chimneys are in direct contact with cold air on the exterior of the structure. Consequently, when

the fireplace is not in use, cold air can fall down the chimney of the fireplace to cool off the fireplace chase.

Therefore, the fireplace chase must be insulated to minimize the risk of cold air infiltration to the home. Even

if the fireplace chase is adequately insulated, this cannot completely ensure that cold air infiltration into the

structure will be eliminated. Cold air infiltration is a possibility with any fireplace or device that freely

communicates with the air on the outside of the structure. Today’s homes are more energy-efficient and,

therefore, better insulated and tightly constructed. Unfortunately, when air is removed from the house, as by a

bathroom fan, or consumed by a furnace, additional air is needed to replace the air consumed. Unless the

additional air is supplied, this can cause a negative pressure in the home. When this happens, the house will

draw in outside air form the cracks in the windows, down the fireplace flue or other locations of air leakage in

the home. Because cold air infiltration may be unavoidable in some structures, Monessen Hearth Systems is

not responsible for heat loss or air infiltration through or around the fireplace.

53D9035. Rev 1 03/03

CLEARANCES

53D9035. Rev 1 03/03

CLEARANCES

53D9035. Rev 1 03/03

CLEARANCES

53D9035. Rev 1 03/03

FIREPLACE LOCATION

CAUTION: Do not install fireplace over carpeting.

This fireplace does not weigh more than large pieces of furniture and can normally be located near a load

bearing wall without requiring additional foundations or supports. If however, the fireplace is to be trimmed

with a heavy stone or brick facing and hearth extension, be sure the supporting structure is adequate.

Figures 3 and 4 provide dimensional details of the fireplace, required spacing to combustible walls, and some

suggested fireplace locations. When selecting a location, choose one that is away from frequently opened

doors, central heat outlets or returns, or other places where air movements may disturb the airflow around the

fireplace. Air turbulence near the fireplace may cause smoke to spill out of the fireplace opening.

53D9035. Rev 1 03/03

8' 0"

LEVEL

SOLID

SURFACE

FIRESTOP SPACER

SEE NOTES



JOIST INSULATE SAME

AS CEILING

NOTES:

1. MODEL LF-FS-2 FIRESTOP 

SPACER MUST BE USED.

2. LOCAL CODES MAY NOT REQUIRE

FIRE STOPPING AT THE CEILING LEVEL

FOR CHASE INSTALLATIONS, BUT IT IS

RECOMMENDED FOR SAFETY AND 

REDUCING HEAT LOSS.

3. DO NOT INSULATE THE CHASE WITH 

BLOWN OR FILL TYPE INSULATION.

INSULATION SHOULD ONLY CONTACT

THE FIREPLACE AT POINTS WHERE 

THE FIREPLACE WOULD NORMALLY BE 

CONTACTED BY FRAMING MATERIALS 

OUTSIDE BASE

INSULATION

(THERMAL BARRIERS)

SOLID CONTINUOUS

SOLID CONTINUOUS

SURFACE

INSULATE OUTSIDE

INSULATE OUTSIDE 

WALLS OF CHASE

CHIMNEY SECTIONS

CHIMNEY SECTIONS

"L" SERIES

LCLF FLAT CHASE 

TOP FLASHING

LCL TELESCOPING

CHIMNEY CAP

Survey the planned location for the fireplace for overhead plumbing or electrical wires, etc., that might complicate

the installation or endanger persons installing or cleaning the chimney. Avoid a location where the chimney

cap will be near abrupt changes in the roof shape, nearby wall or embankments, under or near trees or above

the roof of a single story wing of a two story building as shown by Figure 7. All these conditions can cause

turbulence or pressure conditions that can cause poor chimney draft and smoke spillage from the fireplace

opening. Elbows may be used to offset the chimney to avoid obstructions or to locate the chimney cap in a

preferred location. Refer to the sections of this manual pertaining to chimney offsets for instructions on proper

elbow use. Poor installation or location of the chimney cap and/or components can cause wind blown rain to

enter the chimney.

Be sure the selected location will allow a 17" square combustible material-free space for the chimney to pass

through. If the chimney is to pass through living or storage spaces, be sure there is adequate space to enclose

the chimney to avoid personal contact with, or damage to, the chimney. If the fireplace is to be installed on an

outside wall, the surrounding walls (chase) should be constructed and insulated as shown by Figure 5. Failure

to insulate the fireplace form outside temperatures will cause heat loss through and around the fireplace.

INSTALLATION PREPARATION

FIGURE 5

53D9035. Rev 1 03/03

MULTIPLE STORY INSTALLATION

ATTIC SPACE

SINGLE STORY INSTALLATION WITH

POOR 

LOCATION

PREFERRED 

LOCATION

2" MIN. CLEARANCE 

TO COMBUSTIBLES

"L" SERIES CHIMNEY COMPONENTS

FIRESTOP SPACER

LF-FS-2 (2" AIR SPACE

CLEARANCE TO 

COMBUSTIBLES

17" SQUARE

OPENING

IN JOIST



15 FT MIN.

SEE TABLE 1 FOR

ROOF OPENING

SIZE

3 FT. MIN. OR 2' ABOVE

ANY POINT WITHIN 10'

ATTIC SPACE

FLUE OUTLET HEIGHT

STORM COLLAR

FLASHING

(612 OR 1212)

LC CHIMNEY CAP

FIRESTOP SPACER

LF-FS-2 (2" AIR SPACE

CLEARANCE TO 

COMBUSTIBLES)

17" SQUARE

OPENING IN

JOIST

17" SQUARE

OPENING IN

JOIST

(612 OR 1212)

FLUE OUTLET HEIGHT

2" CLEARANCE TO

COMBUSTIBLES (MIN.)

3 FT. MIN.

HEIGHT - 86 FT. CHIMNEY

MAX. INSTALLATION

SECOND FLOOR AREA

FIRST FLOOR AREA

THIRD FLOOR AREA

ATTIC SPACE

MODEL LC

CHIMNEY CAP

STORM COLLAR

(INCLUDED WITH CAP)

FLASHING

17" SQUARE

OPENING IN

JOIST

SEE TABLE 1 FOR

ROOF OPENING SIZE

FIRESTOP SPACER

LF-FS-2 (2" AIR SPACE 

CLEARANCE TO 

COMBUSTIBLES

FIRESTOP SPACER

LF-FS-2 (2" AIR SPACE

CLEARANCE TO 

COMBUSTIBLES)

INSTALLATION PREPARATION

FIGURE 6

FIGURE 7

FIGURE 8

53D9035. Rev 1 03/03

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