Monessen Hearth NB18, NB24 User Manual

5 (1)
Monessen Hearth NB18, NB24 User Manual

UNVENTED GAS LOG

HEATER or

VENTED DECORATIVE

APPLIANCE

INSTALLATION AND OPERATING

INSTRUCTIONS

MODEL: NB18, NB24

Natural Gas or Liquid Propane

Control Type: Millivolt

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

This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is

installed. Provisions for adequate combustion and ventilation air must be provided.

Refer to page 7.

WARNINGS

If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

Do not store or use gasoline or other flammable vapors and 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.

READ AND SAVE THESE INSTRUCTIONS

CONTENTS

Important Safety Information ..................................

3

Getting Started..........................................................

5

Product Features and Specifications ....................

6

Natural Gas .........................................................

6

Propane/LPG.......................................................

6

Ignition Controls...................................................

6

Pilot/ODS.............................................................

6

Thermal Generator ..............................................

6

General Installation Information ............................

7

Codes ..................................................................

7

Adequate Combustion and Ventilation Air ...........

7

Fireplace and Hearth Dimensions ..........................

9

Placement in a Fireplace

 

with a Restrictive Barrier .......................................

10

Clearances and Height Requirements .................

11

Floor Clearance .....................................................

16

Fireplace Preparation ............................................

17

Installing Vented Applications .............................

18

Connecting the Gas ...............................................

19

Checking Gas Pressure ........................................

20

Millivolt...............................................................

20

Electrical Wiring (Millivolt).....................................

21

Connecting Remote Receiver............................

22

Checking System Operation..............................

22

Berkley Oak Log Placement .................................

23

Ember, Grate, and Rock Installation.....................

25

Optional Cast Iron Grate

 

and Andirons Installation................................

25

Flame Appearance..................................................

26

Checking Burner Flames ......................................

27

Operating Instructions...........................................

28

For Your Safety Read Before Lighting ...............

28

Millivolt Control Lighting Instructions .................

29

Match Lighting Instructions ................................

30

Cleaning Instructions.............................................

30

Troubleshooting .....................................................

31

Replacement Parts .................................................

33

Burner Assembly ...............................................

33

Logs...................................................................

35

Warranty ....................................................

Back page

2

81D0107

IMPORTANT SAFETY INFORMATION

INSTALLER

Please leave these instructions with the appliance.

OWNER

Please retain these instructions for future reference.

IMPORTANT

Read these instructions carefully before installing or trying to operate this vent-free gas heater.

WARNING

• Any change to this heater or its controls can be dangerous.

• Improper installation or use of the heater can cause serious injury or death from fire,

 

 

burns, explosion or carbon monoxide poisoning.

 

• Do not allow fans to blow directly into the fireplace. Avoid any drafts that alter burner

 

flame patterns.

 

• Do not use a blower insert, heat exchanger insert or other accessory, not approved

 

for use with this heater where applicable.

 

 

1.Due to high temperatures, the appliance should be located out of traffic and away from furniture and draperies.

2.Children and adults should be alerted to the hazard of high surface temperature and should stay away to avoid burns or clothing ignition.

3.Young children should be carefully supervised when they are in the same room with the appliance.

4.Do not place clothing or other flammable material on or near the appliance.

5.Any safety screen or guard removed for servicing an appliance, must be replaced prior to operating the heater.

6.Installation and repair should be done by a qualified service person.

7.To prevent malfunction and/or sooting, an unvented gas heater should be cleaned before use and at least annually by a professional service person. More frequent cleaning may be required due to excessive lint from carpeting, bedding material, etc. It is imperative that control compartments, burners and circulating air passageways be kept clean.

8.CARBON MONOXIDE POISONING: Early signs of carbon monoxide poisoning are similar to the flu with headaches, dizziness and/or nausea. If you have these signs, obtain fresh air immediately. Have the heater serviced as it may not be operating properly.

9.The installation must conform with local codes or, in the absence of local codes, with the National Fuel Gas

Code, ANSI Z223.l/NFPA54.

10.This unit complies with the latest revision of ANSI Z21.11.2-2007 Unvented Heaters and also complies with ANSI Z21.60 Decorative Vented Appliances for Solid Fuel Burning Fireplaces. State and local codes may only allow operation of this appliance in a vented configuration. Check your state or local codes. For vented operation, see “Vented Instructions” in this manual.

11.Do not install the heaters in a bathroom or bedroom.

12.Correct installation of the ceramic fiber logs, proper location of the heater, and annual cleaning are necessary to avoid potential problems with sooting. Sooting, resulting from improper installation or operation, can settle on surfaces outside the fireplace. See log placement instructions for proper installation.

13.Avoid any drafts that alter burner flame patterns. Do not allow fans to blow directly into fireplace. Do not place a blower inside burn area of firebox. Ceiling fans may create drafts that alter burner flame patterns. Sooting and improper burning will occur.

14.Caution: Candles, incense, oil lamps, etc. produce combustion byproducts including soot. Vent-free appliances will not filter or clean soot produced by these types of products. In addition, the smoke and/or aromatics (scents) may be reburnt in the vent-free appliance which can produce odors. It is recommended to minimize the use of candles, incense, etc. while the vent-free appliance is in operation.

15.This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is installed. Provisions for adequate combustion and ventilation air must be provided. See page 8.

Continued on page 4

81D0107

3

IMPORTANT SAFETY INFORMATION

Continued from page 3

16.Keep room area clear and free from combustible materials, gasoline and other flammable vapors and liquids.

17.Unvented gas heaters are a supplemental zone heater. They are not intended to be the primary heating appliance.

18.Unvented gas heaters emit moisture into the living area. In most homes of average construction, this does not pose a problem. In houses of extremely tight construction, additional mechanical ventilation is recommended.

19.During manufacturing, fabricating and shipping, various components of this appliance are treated with certain oils, films or bonding agents. These chemicals are not harmful but may produce annoying smoke and smells as they are burned off during the initial operation of the appliance; possibly causing headaches or eye or lung irritation. This is a normal and temporary occurrence.

The initial break-in operation should last four hours to properly cure logs and rock wool, with the burner at the highest setting. Provide maximum ventilation by opening windows or doors to allow odors to dissipate. Any odors remaining after this initial break-in period will be slight and will disappear with continued use.

20.Input ratings are shown in BTU per hour and are for elevations up to 2,000 feet. For elevations above 2,000 feet, input ratings should be reduced 4 percent for each 1,000 feet above sea level. Refer to the National Fuel Gas Code.

21.The appliance and its appliance main gas 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).

22.The appliance must be isolated from the gas supply piping system by closing its equipment 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).

23.Do not use this room heater if any part has been under water. Immediately call a qualified service technician to inspect the room heater and to replace any part of the control system and any gas control which has been under water.

24.This appliance must not be used with glass doors in the closed position. This can lead to pilot outages and severe sooting outside the fireplace.

25.Never burn solid fuels in a fireplace where a unvented room heater is installed.

26.Always have a fireplace screen in place when the appliance is in operation and, unless other provisions for combustion air are provided, the screen must have an opening(s) for induction of combustion air.

WARNING

 

Never connect unit to private (non-

 

 

 

 

utility) gas wells. This gas is commonly

 

 

known as wellhead gas.

 

 

 

We suggest that our gas hearth products be installed and serviced by professionals who are certified in the U.S. by the National Fireplace Institute® (NFI) as Gas Specialists.

www.nficertified.org

MASSACHUSSETTS RESIDENTS ONLY: Please see pages 40 & 41 for additional information.

4

81D0107

GETTING STARTED

MAKE SURE YOU HAVE RECEIVED ALL PARTS:

Check your packing list to verify that all listed parts have been received. You should have the following:

• Unvented Gas Log Burner Assembly

• Two (2)

Plastic Bags Containing Crushed Volcanic Rock

Installation/Operating Instructions

• Two (2)

Anchoring Screws

• Ceramic Fiber Logs / Refractory Logs

Rock wool

Grate Assembly

On/Off Log Switch Assembly

The following options may be used with the Millivolt controlled heater. These options are not packaged with the log set.

• Hand Held Remote with Receiver

• Wall Thermostat with 15' Wire

Wall Switch with 15' Wire

Hand held Thermostat Remote with Receiver

Cast Iron Grate and Andirons

Riser Kit

CAUTION

Gloves are recommended when handling ceramic fiber logs to prevent skin irritation from loose fibers. Logs are fragile — handle with care.

Carefully inspect the contents for shipping damage. If any parts are missing or damaged, immediately inform the dealer from whom you purchased the appliance. Do not attempt to install any part of the appliance unless you have all parts in good condition.

WHAT YOU WILL NEED FOR INSTALLATION:

You should have the following items available before proceeding with installation:

• External regulator (for propane/LPG and 1/2 lb. natural gas systems only)

Piping which complies with local codes

Sediment trap (recommended)

Screwdriver

Tee joint.

• Pipe sealant approved for use with propane/LPG (Resistant to sulfur compounds)

Drill with 5/32 masonry bit

• Pipe wrench or appropriate size crescent wrench set

Manual shutoff valve

 

 

81D0107

5

PRODUCT FEATURES AND SPECIFICATIONS

NATURAL GAS

NOTE: An external regulator is required to reduce supply pressure to a maximum of 10 1/2" W.C. on natural gas systems operating at higher pressure.

MILLIVOLT

 

Model Number

Control

Gas Rate

Regulator Pressure Setting: 3.5" w.c.

Max BTU/Hr

Min BTU/Hr

NB18NV

Millivolt

28,000

19,000

Pilot Regulator:

3.5" w.c.

NB24NV

Millivolt

37,000

25,000

Gas Inlet Pressure:

Max 101/2" w.c.

 

 

 

 

Min. 5" w.c.

PROPANE/LPG

Note: An external regulator is required to reduce supply pressure to a maximum of 13" w.c.

MILLIVOLT

 

 

 

Gas Rate

Regulator Pressure Setting: 10" w.c

Model Number

Control

Max BTU/Hr

Min BTU/Hr

Gas Inlet Pressure:

Max. 13" w.c.

NB18PV

Millivolt

27,000

22,000

NB24PV

Millivolt

36,000

28,000

 

Min. 11" w.c.

 

 

 

 

 

IGNITION CONTROLS

Piezo ignitor allows ignition of the pilot without the use of matches or batteries.

Millivolt control has four (4) positions:

OFF

- All gas to the gas logs is shut off at the valve.

IGN

- Valve position to light/maintain a standing pilot.

ON

-

Valve position to turn ON/OFF log set with remote switch/thermostat.

LOW/HI

-

Variable position to control flame height (heat output).

PILOT/ODS

The gas log heater is fitted with a specially designed safety pilot (ODS assembly) which senses the amount of oxygen available in the room and shuts the gas log heater off if the oxygen level begins to drop below a satisfactory level. The pilot can only be relit when adequate fresh air is available.

THERMAL GENERATOR

The millivolt gas log pilot is fitted with a Millivolt (thermopile) generator to provide power for remote activation.

6

81D0107

GENERAL INSTALLATION INFORMATION

CODES

Adhere to all local codes or, in their absence, the latest edition of THE NATIONAL FUEL GAS CODE ANSI Z223.1 or NFPA54 which can be obtained from…

American National Standards Institute, Inc.

1430 Broadway

New York, NY 10018

or

National Fire Protection Association, Inc.

Batterymarch Park

Quincy, MA 02269

ADEQUATE COMBUSTION AND VENTILATION AIR

This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air.

The National Fuel Gas Code, (ANSI Z223.1/NFPA 54), defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 BTU per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space. An unconfined space is defined as a space whose volume is not less than 50 cubic feet per 1,000 BTU per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed, through openings not furnished with doors, are considered a part of the unconfined space.

UNUSUALLY TIGHT CONSTRUCTION IS DEFINED AS CONSTRUCTION WHERE…

a)walls and ceilings exposed to the outside atmosphere have a continuous water vapor retarder with a rating of 1 perm (6 x 1011 kg per pa-sec-m2) or less with openings gasketed or sealed;

b)weather striping has been added on openable windows and doors, and

c)caulking or sealants are applied to areas such as joints around window and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and gas lines, and at other openings.

81D0107

7

GENERAL INSTALLATION INFORMATION

Counter

Fireplace

H

W

Figure 1 - Example of a Large Room with 1/2 Wall Divider

The following formula can be used to determine the maximum heater rating per the definition of unconfined space:

BTU/Hr =

(L1 + L2) Ft x (W) Ft x (H) Ft.

x 1000 BTU/Hr

50

Consider two connecting rooms with an open area between, with the following dimensions:

 

L1 = 151/2 Ft., L2 = 12 Ft., W = 12 Ft., H = 8 Ft.

BTU/Hr =

 

(151/2 + 12) x (12) x (8)

x 1000 = 52800 BTU/Hr

50

 

 

If there were a door between the two rooms the calculation would be based only on the room with the heater.

BTU/Hr =

(151/2) x (12) x (8)

x 1000 = 29760

BTU/Hr

 

 

50

 

 

 

 

 

WARNING

If the area in which the heater may be operated is smaller than that defined as an unconfined space or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of the methods described in the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3 or applicable local codes.

8

81D0107

FIREPLACE AND HEARTH DIMENSIONS

WARNING

This appliance is for installation only in a solid-fuel burning masonry or UL127 factorybuilt fireplace, vent free appliance, or in listed ventless firebox enclosure. It has been design certified for these installations.

Exception: DO NOT install this appliance in a factory-built fireplace that includes instructions stating it has not been tested or should not be used with unvented gas logs.

Use manufacturer's installation and clearance requirements as defined in their manual.

The NB Series unvented room heater is approved for installation into the following unvented fireplaces:

GCUF Series Fireboxes Magnum36/42, Lo-Rider36 or BUF

The NB Series unvented room heater may also be installed into a Ventless Firebox Enclosure for Gas Fired Decorative Type Unvented Room Heaters per IAS Requirement No. 2-97 ANSI Z21.91-2001 (typically referred to as a "Universal Firebox"), as long as firebox hearth dimensions meet the minimum hearth dimensions shown below.

Model

A

B

C

D

NB18 with BO18(R,F)

26"

13"

18"

17"

NB24 with BO24(R,F)

29"

13"

221/4"

17"

NB24 with BO30(R,F)

33"

13"

251/4"

17"

Without front grate installed “B” will be 121/2.

C

D

A

B

Figure 2 - Hearth Minimum Dimension

81D0107

9

PLACEMENT IN A FIREPLACE WITH A RESTRICTIVE BARRIER

IMPORTANT INFORMATION FOR THE INSTALLATION OF THIS GAS LOG SET

The following are guidelines for placing a gas log set in a fireplace that has a restrictive barrier along the bottom front opening of the fireplace. Some examples of barriers are glass/screen door frames and sunken/recessed fireplaces.

Height of Restriction (X)

Minimum Depth of Fireplace/Firebox

No restriction

13"

0 to 11/2"

16"

From 11/2" to 3"

16"

Greater than 3"

ANY BARRIER GREATER THAN THREE INCHES (3") PLACED IN FRONT OF

 

THE GAS LOG SET IS NOT RECOMMENDED BY THE MANUFACTURER.

Glass door frames with adjustable louvers should have the louvers fully open while the unit is in operation.

Height of restrictive barrier X caused by glass door frames, recessed fireplaces, etc. from

the base or bottom surface of the unit. (See Table).

The log set should be placed against or as near as possible to the rear wall of the fireplace/firebox.

Depth of fireplace/firebox.

(See Table).

Figure 3 - Reference Drawing of a Natural Flame Log Set in an Enclosure

WARNING

Barriers such as the bottom of a glass door frame placed in front of a gas log set can change the air flow characteristics of the fireplace which in turn can cause the unit to overheat and malfunction.

NOTE: Non combustible material such as refractory brick may be used to line the floor of the fireplace in order to raise the height of the gas log set in relation to a restrictive barrier. If the unit is raised, the minimum height dimension listed in the homeowner’s manual must not be exceeded.

NOTE: If the log set is equipped with a remote receiver, a restrictive barrier may reduce the battery life by increasing the ambient temperature inside the fireplace. Placement of the receiver outside of the fireplace will extend the battery life.

10

81D0107

CLEARANCES AND HEIGHT REQUIREMENTS

WARNING

The dimensions shown in Figures 4 through 12 and defined in the fireplace manufacturer's instructions are minimum clearances to maintain when installing this heater. Left and right clearances are determined when facing the front of the heater.

When heater is installed into a ventless firebox, minimum clearances, as specified by the ventless firebox manufacturer, must be met.

Follow these instructions carefully to ensure safe installation. Failure to follow instructions exactly can create a fire hazard.

Sidewall and ceiling clearances: The sides of the fireplace opening must be at least 16" from any combustible wall. The ceiling must be at least 42" from the top of the fireplace opening.

42"

16"

Figure 4 - Sidewall and Ceiling Clearances

81D0107

11

CLEARANCES and HEIGHT REQUIREMENTS

Heat resistant material (minimum requirements) with no wooden mantel or other combustible projection:

To install the gas logs into a fireplace with no wooden mantel, shelf or other combustible projection above the fireplace opening, measure the heat resistant material height, per Figure 5, then see TABLE A.

Heat resistant materials such as slate and marble must be at least 1/2” thick. Sheet metal should not be installed onto combustible material.

IMPORTANT: If you cannot meet these minimum clearances you must operate the heater with chimney flue damper open. Refer to “Installing Vented Applications” found on page 18.

Heat

Resistant

Material

Measure

this

distance

Heater in

Fireplace or

Firebox

Figure 5 - Measuring Heat Resistant Material

HEAT RESISTANT

REQUIREMENTS FOR SAFE INSTALLATION

MATERIAL

 

 

NB18

NB24

MEASUREMENT

 

 

12" or more

Hood not required.

Hood not required.

8" to less than 12"

Hood not required.

Extend heat resistant material

 

 

to 12" OR install hood. See

 

 

Figure 5.

Less than 8"

Extend heat resistant material

Extend heat resistant material

 

and 8” AND install hood. See

to 8" AND install hood. See

 

Figure 5.

Figure 5. OR, extend heat

 

 

resistant material to a height of

 

 

at least 12".

TABLE A - Heat Resistant Material Requirements with no Mantel or Combustible Projection

12

81D0107

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