Monessen Hearth Natural Blaze, NB18PV, NB18NV, NB24PV, NB18NIF Owner's Manual

...

Installation/Owner’s Manual

Appliance Setup, Care and Operation

INSTALLER: Leave this manual with party responsible for use and operation. OWNER: Retain this manual for future reference. Contact your dealer with questions regarding installation, operation or service.

NOTICE: DO NOT discard this manual!

Natural Blaze Series

Models:

NB18NV/PV NB24NV/PV NB18NIF/PIF NB24NIF/PIF

WARNING: FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury, death, or property damage.

• DO NOT store or use gasoline or other am- mable 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.

- Leave the building immediately.

- 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 re department.

• Installation and service must be performed

by a qualied installer, service agency, or the gas supplier.

In the Commonwealth of Massachusetts installation must be

performed by a licensed plumber or gas tter.

See appliance installation manual for additional

Commonwealth of Massachusetts requirements.

• DO NOT install this unit in a bedroom or

bathroom.

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/19

Safety Alert Key:

• DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.

• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.

• CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

• NOTICE: Used to address practices not related to personal injury.

Table of Contents

Installation Standard Work Checklist ....................3

1 Product Specic & Important Safety Information

A. Appliance Certication ............................4

B. BTU Specications ...............................4

C. Gas Pressures .................................. 4

D. High Altitude Installations ..........................4

E. Non-Combustible Materials Specication. . . . . . . . . . . . . . 4

2 Getting Started

A. Design and Installation Considerations ............... 5

B. Tools and Supplies Needed ........................ 5

C. Inspect Appliance and Components ..................5

D. Check Parts ....................................6

E. Installation Information ............................ 6

F. Adequate Combustion Ventilation Air ................. 7

3 Clearances & Height Requirements

A. Clearances & Height Requirements ..................9

B. Before Installing the Appliance ..................... 13

C. Damper Stop Installation ......................... 13

D. Assembly Procedure ............................14

4 Gas Information

A. Gas Line Connection ............................15

B. Fuel Type .....................................15

C. Gas Pressure ..................................15

D. Gas Service Access .............................16

E. Check Gas Pressure ............................16

5 Electrical Information

A. General Information .............................17

B. Connect Optional Wall Switch or Thermostat ..........18

C. Connect Remote Receiver ........................19

D. Check System Operation .........................19

E. Wiring Requirements ............................20

F. Detailed Component Operating Instructions ..........21

7 Owner’s Manual

A. Congratulations ................................ 31

B. Limited Lifetime Warranty .........................32

8 Product Specication Information

A. Application Certication ..........................35

B. BTU Specications ..............................35

9 Important Safety & Operating Information

A. Appliance Safety ............................... 36

B. General Operating Parts ......................... 38

C. Fuel Specications ..............................38

D. Before Lighting Appliance. . . . . . . . . . . . . . . . . . . . . . . . . 38

10 Lighting Instructions

A. Millivolt .......................................39

B. Intellire Plus ODS (IFP) .........................42

C. Initial Use ..................................... 44

11 IntelliFire Plus

A. RC300 Remote Control .......................... 45

12 Maintenance & Service

A. Maintenance: Frequency & Tasks .................49

B. Maintenance Tasks: Qualied Service Technician .....49

C. Burner Ignition & Operation .......................49

D. Cleaning & Servicing ............................ 50

13 Troubleshooting

A. Millivolt Control System .......................... 51

B. IntelliFire Plus ODS Ignition System ................ 52

14 Service Parts & Accessories

A. Service Parts .................................. 54

B. Accessories ................................... 72

C. Contact Information ............................. 74

6 Gas Log Set

A. Grate & Log Installation ..........................22

B. Log Placement (Berkley Oak) ..................... 23

C. Log Placement (Highland Oak) ....................25

D. Log Placement (Stoney Creek) ....................26

E. Log Placement (Beachcomber) ....................28

F. Flame Appearance .............................. 29

G. Operating Instructions ........................... 29

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/192

NOTE: Monessen vent free gas logs are hand painted for ultimate beauty and realism. As a result, some variation in color and shading will occur from set to set. This is intentional and designed to make each product unique, as found in nature.

Installation Standard Work Checklist

ATTENTION INSTALLER:

This standard work checklist is to be used by the installer in conjunction with, not instead of, the instructions contained in this installation manual.

Customer: Lot/Address:

Model

(circle one): NB18NV,NB18PV,NB18NIF,NB18PIF

WARNING! Risk of Fire or Explosion! Failure to install appliance according to these instructions could lead to a fire or explosion.

Gas Log Install Sections 2 and 5

Verified that the chimney has been cleaned. (pg. 13) Verifi ed clearances to combustibles.

Gas Logs are leveled and secured. See page 8 for adequate provisions for combustion and ventilation air have been verified.

Gas Section 4

Proper appliance for fuel type. Leak check performed and inlet pressure verified. Verified proper air shutter setting for installation type.

Follow this Standard Work Checklist

Date Installed: Location of Fireplace: Installer:

NB24NV,NB24PV,NB24NIF,NB24PIF

Dealer/Distributor Phone # Serial #:

?YHW , ON F I SEY

___________________________ ___________________________

___________________________

___________________________ ___________________________ ___________________________

Electrical Section 5

Switch wires properly installed.

Embers & Logs Section 6

All packaging and protective materials removed (inside & outside of appliance). Embers and logs installed correctly.

Accessories installed properly.

Finishing Section 3

Verifi ed all clearances meet installation manual requirements. Mantels and wall projections comply with installation manual requirements.

Manual bag and all of its contents are removed and the log set given to party responsible for use and operation. Started log set and veried no gas leaks exist.

___________________________ ___________________________

___________________________

___________________________ ___________________________

Hearth & Home Technologies recommends the following:

• Photographing the installation and copying this checklist for your file.

• That this checklist remain visible at all times on the appliance until the installation is complete. Comments: Further description of the issues, who is responsible (Installer/ Builder/ Other Trades, etc) and corrective action needed _____________________________________________________________________________________ Comments Communicated to party responsible ____________________ by ______________________on ___________

 = Contains updated information.

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/19

(Builder / Gen. Contractor/) (Installer) (Date)

4619-982 08/19

Product Specic and Important Safety Information

A. Appliance Certication

MODEL: NB18NV/PV, NB24NV/PV, NB18NIF/PIF

NB24NIF/PIF

LABORATORY: CSA

TYPE: Unvented Room Heater

STANDARD: ANSI Z21.11.2-2016 (Unvented Heaters)

ANSI Z21.60-2017∙CSA 2.26-2017 (Decorative

Gas Appliances for Installation in Solid-Fuel Burning Fireplaces)

This product is listed to ANSI standards for "Unvented Room Heaters” and applicable sections of "Gas Burning Heating Appliances for Manufactured Homes" and "Gas Fired Appliances for Use at High Altitude."

NOTICE: This installation must conform with local codes. In the absence of local codes you must comply with the National Fuel Gas Code, ANSI Z223.1-latest edition in the U.S.A.

NOT INTENDED FOR USE AS A PRIMARY HEAT SOURCE.

This appliance is tested and approved as either supplemental room heater or as a decorative appliance. It should not

be factored as primary heat in residential heating calcula-

tions.

NOTE: For LP models an external regulator is required to reduce supply pressure to a maximum of 13" w.c.

C. Gas Pressures

NATURAL PROPANE (LP)

Inlet Minimum 5.0" w.c. 11.0" w.c.

Inlet Maximum 10.5" w.c. 13.0" w.c.

Gas Valve Manifold Pressure Setting

Pilot Regulator 3.5" w.c. —

NATURAL GAS: An external regulator is required to reduce supply pressure to a maximum of 101⁄2" w.c. on natural gas systems operating at higher pressure.

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

Pilot/ODS

The gas log heater is tted 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.

3.5" w.c. 10" w.c.

B. BTU Specications

Maximum

Models

NB18NV (0-2000 FT) 28,000 19,000 #38

NB18PV (0-2000 FT) 27,000 22,000 #52

NB24NV (0-2000 FT) 37,000 25,000 3.00 mm

NB24PV (0-2000 FT) 36,000 28,000 #49

NB18NIF (0-2000 FT) 28,000 19,000 #38

NB18PIF (0-2000 FT) 27,000 22,000 #52

NB24NIF (0-2000 FT) 37,000 25,000 3.00 mm

NB24PIF (0-2000 FT) 36,000 28,000 #49

Input

BTU/h

Minimum

Input

BTU/h

Orice

D. High Altitude Installations

NOTICE: If the heating value of the gas has been reduced, these rules do not apply. Check with your local gas utility or authorities having jurisdiction.

When installing above 2000 feet elevation: Reduce input rate 4% for each 1000 feet above sea level.

Check with your local gas utility to determine proper

orice size.

E. Non-Combustible Materials Specication

Material which will not ignite and burn. Such materials are

those consisting entirely of steel, iron, brick, tile, concrete,

slate, glass or plasters, or any combination thereof.

Materials that are reported as passing ASTM E 136,

Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750 ºC shall be considered

non-combustible materials.

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/194

Getting Started

A. Design and Installation Considerations

Installation MUST comply with local, regional, state and national codes and regulations. Consult insurance carrier, local building inspector, re ofcials or authorities having

jurisdiction over restrictions, installation inspection and

permits.

Before installing, determine the following:

• Where burner assembly and log set are to be installed.

• Gas supply piping.

• Whether optional accessories—devices such as a wall

switch or remote control—are desired.

• Approved wood burning masonry replace or vent-free replace.

Installation and service of this appliance should

be performed by qualied personnel. Hearth & Home Technologies recommends HHT Factory Trained or NFI certied professionals.

Improper installation, adjustment, alteration, service or

maintenance can cause injury or property damage. For assistance or additional information, consult a qualied service technician, service agency or your dealer.

B. Tools and Supplies Needed

Before beginning the installation be sure that the following

tools and building supplies are available.

• Tape measure

• Gloves

• Voltmeter

• Manometer

• Phillips screwdriver

• Safety glasses

• Flat blade screwdriver

• Soapy water solution for gas leak testing

• Electric drill and bits (1/4 in. magnetic)

• External regulator (for propane/LPG only & 1/2 psi

Natural gas system

• Piping which complies with local codes

• Pipe sealant approved for use with propane/LPG

(Resistant to sulfur compounds)

• Manual shutoff valve

• Sediment trap

• Tee joint

• Pipe wrench

C. Inspect Appliance and Components

• Carefully remove the appliance and components from

the packaging.

• Logs are packaged and sold separately.

• Report to your dealer any parts damaged in shipment.

• Read all of the instructions before starting the instal-

lation. Follow these instructions carefully during the

installation to ensure maximum safety and benet.

WARNING! Risk of Fire or Explosion! Damaged parts could impair safe operation. DO NOT install damaged, incomplete or substitute components. Keep appliance dry.

Hearth & Home Technologies disclaims any responsibility for, and the warranty will be voided by, the following actions:

• Installation and use of any damaged appliance.

• Modication of the appliance.

• Installation other than as instructed by Hearth & Home Technologies.

• Installation and/or use of any component part not approved by Hearth & Home Technologies.

Any such action may cause a re hazard.

WARNING! Risk of Fire, Explosion or Electric Shock! DO NOT use this appliance if any part has been under

water. Call a qualied service technician to inspect the

appliance and to replace any part of the control system and/or gas control which has been under water.

WARNING: This product and the fuels used to operate this product (liquid propane or natural gas), and the products of combustion of such fuels, can expose you to chemicals including benzene, which is known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings. ca.gov.

Gloves are recommended when handling refractory and logs to prevent skin irritation

from loose bers. Logs are fragile; handle

with care.

CAUTION

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/19

D. Check Parts

Verify contents to ensure you have received all parts. You should have the following:

NB Models

• Unvented gas log burner assembly

• Two (2) bags of crushed volcanic rock

• Installation/operating instructions

• Two (2) Anchoring Screws

• Ceramic ber or refractory logs

• Rock wool

• Grate assembly

• On/off log switch assembly (MV models only)

• RC300 remote control (IFP models only)

• Double A batteries (IFP models only)

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 (MV)

• Wall switch with 15' wire

• HILOKTN/P (an accessory kit for ame adjustment

from a hand held remote)

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.

Model A B C D

NB18 w/18" Log 26" 13" 18" 17"

NB24 w/24" Log 29" 13" 22

NB24 w/30" Log 33" 13" 25

NB18IF w/18" Log 28

NB24IF w/24" Log 31" 13" 25

NB24IF w/30" Log 35" 13" 25

Figure 2.1 - Minimum Dimensions for Engine, Logs &

Firebox

⁄2" 13" 201⁄4" 17"

⁄4" 17"

E. Installation Information

WARNING

This appliance is for installation only in a solid-fuel

burning masonry or UL127 factory-built replace or in listed ventless rebox enclosure. It has been design certied for these installations.

Exception: DO NOT install this appliance in a factory-

built replace that includes instructions stating

it has not been tested or should not be used with unvented gas logs.

Use manufacturer's installation and clearance require-

ments as dened in their manual.

The NB18, 24, 30 series unvented room heaters are approved for installation into the following unvented reboxes: MCUF, LCUF, GCUF, GRUF, BUF and Exacta.

The Natural Blaze Series unvented room heaters may also be installed into a Ventless Firebox Enclosure for Gas Fired Decorative Type Unvented Room Heaters per ANSI Z21.91 (typically referred to as a "universal rebox"), as long as rebox hearth dimensions meet the minimum hearth dimensions shown below. See Figure 2.1.

Placement in Fireplace with a Restrictive Barrier

The following are guidelines for placing a gas log set in a replace that has a restrictive barrier on the replace for vented appliance only. See Figure 2.2.

Height of Restriction

(x)

No Restriction 13"

0" to 3" 16"

Greater than 3" *

*Any barrier greater than 3" placed in front of the gas log set is not

recommended by the manufacturer.

NOTE: Non-combustible material such as refractory brick may be used to line the oor of the replace 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 be met or 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 replace. Placement of the receiver outside of the replace will extend the battery life.

Minimum Depth of

Fireplace/Firebox

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/196

WARNING

Barriers such as the bottom of a glass door frame placed in front of a gas log set can change the air

ow characteristics of the replace which in turn

can cause the unit to overheat and malfunction when installed as a vented log set.

Height of restrictive barrier caused by glass door frames, recessed replaces, etc. from the base or bottom surface of the unit. (Refer to table)

Glass door frames with adjustable louvers

should have the louvers fully open while the unit is in operation

Figure 2.2 - Reference Drawing of a Natural Flame Log Set in an Enclosure with Glass Door or Barrier Installed

The log set should be placed against

or as near as possible to the rear

wall of the replace/rebox.

Depth of replace/rebox

(Refer to table)

F. Adequate Combustion Ventilation Air

This heater shall not be installed in a conned space or

unusually tight construction unless provisions are provided

for adequate combustion and ventilation air. The National Fuel Gas Code, (ANSI Z223.1/NFPA54),

denes a conned space as a space whose volume is less than 50 cubic feet per 1,000 BTU per hour (4.8m

of the aggregate input rating of all appliances installed in

that space, and an unconned space 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 communicat-

ing directly with the space in which the appliances are installed, through openings not furnished with doors, are

considered a part of a conned space. Unusually tight construction is dened 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 10

kg per pa/sec-m2) or less with openings

gasketed or sealed, and

b. Weather stripping has been added to windows and

doors, and

c. Caulking or sealants are applied to areas such as joints

around window and door frames, between sole plates

and oors, between wall-ceiling joints, between wall

panels, at penetrations for plumbing, electrical and gas

lines and other openings.

per kw)

WARNING

Do not install the heater:

• Where curtains, furniture, clothing, or

other ammable objects are less than

36" from the front of the heater.

• In high trafc areas.

• In windy or drafty areas.

WARNING

Gloves are recommended when handling logs to prevent skin irritation from loose

bers. Logs are fragile—handle with care.

The following formula can be used to determine the maximum heater rating per the denition of unconned space: Refer to Figure 2.3.

BTU/Hr = (L1 + L2) Ft x (W) Ft x (H) Ft

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)

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)

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/19

Counter

Figure 2.3

WARNING

If the area in which the heater may be operated does not meet the required volume for indoor combustion air, combustion and ventilation air shall be provided by one of the methods described in the National

Fuel Gas Code, ANSI Z223.1/NFPA 54, the International Fuel Gas Code or applicable

local codes.

Fireplace

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/198

Clearances and Height Requirements

A. Clearances and Height Requirements

WARNING

The dimensions shown in Figures 3.1 through

3.8 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 rebox, minimum clearances, as specied by the ventless rebox manufacturer, must be met.

Follow these instructions carefully to ensure safe installation. Failure to follow instructions exactly

can create a re hazard.

Sidewall and ceiling clearances: The sides of the re- place opening must be at least 16" from any combustible

wall. The ceiling must be at least 42" from the top of the replace opening.

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

To install the gas logs into a replace with no wooden

mantel, shelf or other combustible projection above the

replace opening, measure the heat resistant material height, according to Figure 3.2 and 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 clear-

ances you must operate the heater with chimney ue damper open. Refer to “Installing Vented Applications” found on page 13.

Heat resistant

Material

Measure

This

42"

16"

Figure 3.2 - Measure Heat Resistant Material

Figure 3.1 - Sidewall and Ceiling Clearances

Table A — Heat Resistant Material Requirements with No Mantel or Combustible Projection

Heat Resistant Material Measurement

12" or more Hood not required Hood not required

8" or less than 12" Hood not required Extend heat resistant material to 12" or install hood. Figure 3.3

NB18 NB24

Requirements for Safe Installation

Distance

Heater in Fireplace/ Firebox

Less than 8" Extend heat resistant

material to 8” AND install hood. Figure 3.3

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/19

Extend heat resistant material to 8" AND install hood Figure 3.5. OR Extend heat resistant material to a height of at least 12".

Heat resistant material (minimum requirements) with wooden mantel or other combustible projection:

To install the heater with a wooden mantel, shelf or other combustible projection above, rst measure the heat resistant material shown in Figure 3.3, then refer to Table B.

8" or More

Hood

Heater in Fireplace or Firebox

of Heat Resistant

Material

Figure 3.3 - Measuring Heat Resistant Material for Mantel

Table B - Heat Resistant Material Requirements Height and Mantel Location

Heat Resistant Material Measurement

Requirements for Safe Installation with Wooden Mantel, Shelf or other Combustible

Projection

NB18 NB24

12" or more Hood not required. Observe proles (side

elevations) shown in Figure 3.6 .

8" or less than 12" Install hood and observe proles shown

in Figure 3.5 OR Extend heat resistant material to at least 12" and observe proles shown in Figure 3.6.

Less than 8" Extend heat resistant to at least 8", install

hood and observe proles shown in Figure

3.5 . OR Extend heat resistant material to at least 12" and observe proles shown in Figure 3.6.

Hood not required. Observe prole (side elevations shown in Figure 3.6 .

Install hood and observe proles shown in Figure 3.5 . OR Extend heat resistant material to at least 12" and observe proles shown in Figure 3.6.

Extend heat resistant material to least 8", install hood and observe proles shown in Figure 3.5 . OR Extend heat resistant material to at least 12" and observe proles shown in Figure 3.6.

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/1910

Heat Resistant

Material

10"

2¹⁄₂"

8" 14" 20¹⁄₂" 24⁵⁄₈" 28"

Heat Resistant

Material

10" or less

28"

12" min.

Heater in Fireplace or Firebox

Figure 3.4 - Minimum Mantel Clearance with No Hood —

NB18

Example: A mantel may project from the wall a maximum

of 21⁄2" at a minimum of 14" above the opening, and a

maximum of 6" at a minimum of 201⁄2" above the opening.

12" 10"

8" 6"

Heat Resistant

Material

2¹⁄₂"

8" 14¹⁄₂" 18⁵⁄₈" 22¹⁄₂" 26"

Heater in Fireplace or Firebox

Figure 3.6 -Minimum Mantel Clearance with No Hood —

NB18/24

Example: The bottom of the mantel may project from the

wall a maximum of 10" at a minimum of 28" above the opening.

Hood

Heater in Fireplace or Firebox

Figure 3.5 - Minimum Mantel Clearance with Hood — All

Models

Example: A mantel may project from the wall a maximum of 21⁄2" at a minimum of 8" above the opening, and a maximum of 6" at a minimum of 141⁄2" above the opening.

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/19

The gas log heater must be installed at least 13⁄8" above any combustible ooring material, such as carpeting or tile, which is closer than 14" to the base of the replace. The minimum distance must be maintained from the top surface of carpeting, tile, etc. Figure 3.7

The gas log heater may be installed nearer to the oor if a minimum of 14" of noncombustible material such as slate or marble is installed between the base of the replace and the combustible ooring. Figure 3.8

Heater in Fireplace or Firebox

Combustible Material

⁄8" Minimum

Figure 3.7 - Minimum Clearance above Combustible Flooring

This Distance May Now be Less Than 1

⁄8"

Heater in Fireplace or Firebox

Combustible Material

14” Minimum

Figure 3.8 - Minimum Clearance above Combustible Flooring with Noncombustible Material Installed at Base of Fireplace

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/1912

WARNING

Before installing in a solid fuel burning replace, The chimney ue and rebox must be cleaned of soot, creosote, ashes and loose paint by a qualied

chimney cleaner.

WARNING

This log set can be installed in a solid fuel burning fireplace (masonry fireplace or manufactured

replace) with a working ue and constructed of non combustible material or in a vent-free rebox.

Exception: DO NOT install this appliance in a factory-

built replace that includes instructions stating that

it has not been tested or should not be used with unvented gas logs. This log set may be installed as a vented log set.

WARNING

The use of thermostat is not allowed on vented log application. It is only allowed on unvented room

heater classication.

B. Before installing the appliance:

• Turn off gas supply to replace or rebox.

• Have the replace oor and chimney professionally

cleaned to remove ashes, soot, creosote or other

obstructions. Have this cleaning performed annually after installation.

• Seal any fresh air vents or ash clean-out doors

located on oor or wall of replace. If not, drafting may cause pilot outage or sooting. Use a heatresistant sealant.

Install and operate the appliance as directed in this manual.

C. Damper stop installation:

A damper stop must be provided with the unit. Contact your dealer to obtain one. The damper stop must be installed as shown in Figure 3.9 to prevent full closure of the replace damper blade and provide a minimum 29 square inch ue opening.

Damper Stop

Before Fully Installing the Unit:

Turn OFF the gas supply to the replace or rebox.

•

• Seal any fresh air vents and/or ash clean-out doors

located on the oor or wall of the replace. If left

unsealed, drafting may cause pilot outage or soot-

ing. Use a heat resistant sealant. Do not seal the

chimney ue damper.

Vented Application Installations — NB & NBIF Only

Intellire Plus ODS (IFP) and millivolt controlled gas logs

may be installed as a vented decorative log set in com-

pliance with ANSI Z21.60 and National Fuel Gas Code, Section 6.6. Since, the gas logs are operated with the

damper open, non-combustible material and minimum mantel requirements do not apply.

NOTE: The use of a thermostat is prohibited in vented

log installations.

Damper

Figure 3.9 - Damper Stop Installation.

WARNING

When this log set is installed in a vented application, the damper must be clamped to be fully open.

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/19

D. Assembly Procedure

1. Center the burner assembly inside the fireplace or firebox. Make certain that the front of the burner assembly sits inside the front edge of the replace or the rebox.

2. Anchor holes are located on the right and left sides of the brackets attached to the engine base. After centering

the burner assembly correctly, mark the holes on the

replace or rebox oor. Drill two (2) 5/32” diameter holes approximately 1 ¼” deep. Anchor the two anchoring screws shipped with the unit using ¼” hex head chuck and secure the burner assembly to the replace through the holes drilled earlier. See Figure 3.10.

3. Anchor the grate to the replace/rebox oor using the

screws provided. See Figure 3.10.

Proper installation of the grate is essential to prevent any movement of the gas logs and controls during operation.

WARNING

You must secure the gas log heater to the replace oor. If not, the entire unit may move when you

adjust the controls. Movement of unit may cause shifting of the gas logs which leads to sooting and improper burning. Grate movement could cause a gas leak.

Special care is required if you are installing the unit

into a sunken replace. You must raise the replace oor to allow access to gas log controls. This will ensure adequate air ow and guard against sooting.

Raise the fireplace floor using noncombustible materials, as described in Placement in a Fireplace with Restrictive Barrier on Page 6.

Screw

Anchor Hole

Figure 3.10 - Securing Heater to Floor of Fireplace/Firebox

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/1914

Gas Information

WARNING

Use new black iron or steel pipe. Internally tinned copper or copper tubing can be used per National Fuel Code, section 2.6.3, providing gas meets

hydrogen sulde limits, and where permitted by local

codes. Gas piping system must be sized to provide minimum inlet pressure (Listed on Data Plate) at the

maximum ow rate (BTU/hr). Undue pressure loss

will occur if the pipe is too small.

A manual shutoff valve must be installed upstream of the appliance. Union tee and plugged 1/8" NPT pressure tapping point should be installed upstream of the appliance.

A. Gas Line Connection

NOTICE: A qualied gas appliance installer must connect

the heater to the gas supply. Consult all local codes.

IMPORTANT: Hold heater valve rmly with a wrench to prevent movement when connecting to inlet pipe.

Always use an external regulator for all propane/LPG

heaters and high pressure one to two-pound systems

only, to reduce the supply tank pressure to a maximum of 13" w.c. This is in addition to the internal regulator in the heater valve.

WARNING

Connecting directly to an unregulated propane/ LPG tank can cause an explosion.

The heater gas inlet connection is a 3/8" NPT at the valve. On all control type units, the inlet connection is on the right side of unit. To connect from the opposite side, route the pipe around the back portion of the unit.

When tightening up the joint to the valve, hold the valve

securely to prevent movement.

Test all gas joints from the gas meter to the heater valve for leaks using a gas analyzer or soap and water solution after completing connection. DO NOT USE AN OPEN FLAME.

Check the gas pressure with the appliance burning and the control set to HIGH.

B. Fuel Type

• This appliance is equipped for either natural or propane gas. Field conversion is not permitted.

• Make sure the appliance is compatible with available gas

types.

C. Gas Pressure

• Optimum appliance performance requires proper input pressures.

• Gas line sizing requirements will be determined in ANSI Z223.1 National Fuel Gas Code in the USA.

• Pressure requirements are:

Figure 4.1 Gas Connection

WARNING

CHECK GAS TYPE: The gas supply must be the same as stated on the heater’s rating plate. If the gas supply is different, DO NOT INSTALL THE HEATER. Contact your dealer for the correct model.

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/19

NATURAL PROPANE (LP)

Inlet Minimum 5.0" w.c. 11.0" w.c.

Inlet Maximum 10.5" w.c. 13.0" w.c.

Gas Valve Manifold Pressure Setting

Pilot Regulator 3.5" w.c. —

WARNING! Risk of Fire or Explosion! High pressure will damage valve. Low pressure could cause explosion.

• Verify inlet pressures. Verify minimum pressures when other household gas appliances are operating.

• Install regulator upstream of valve if line pressure is

greater than 1/2 psig.

• Valve pressure taps are accessible by removing the right side log. See Figure 4.2.

3.5" w.c. 10" w.c.

Note: Have the gas supply line installed in accordance with local codes, if any. If not, follow ANSI Z223.1. Installation should be done by a qualied installer approved and/or licensed as required by the locality. (In the Commonwealth

of Massachusetts installation must be performed by a

licensed plumber or gas tter).

D. Gas Service Access

Depending upon local code, a manual gas shutoff, in a readily accessible area may be required and located upstream from the appliance.

WARNING

Fire Risk.

Explosion Hazard.

High pressure will damage valve.

• Disconnect gas supply piping BEFORE

pressure testing gas line at test pressures

above 1/2 psig.

• Close the manual shutoff valve BEFORE

pressure testing gas line at test pressures

equal to or less than 1/2 psig.

Intellire Plus ODS (IFP)

Check the gas pressure with the appliance burning and the control set to HIGH.

The valve regulator controls the burner pressure which should be checked at the pressure test point.

Turn captured screw counterclockwise two or three turns and then place tubing to pressure gauge over test point. Use test point “A” closest to gas inlet. After taking pres-

sure reading, be sure and turn captured screw clockwise

rmly to reseal. Do not over torque. Check for gas leaks. See Figure 4.3.

E. Check Gas Pressure

Millivolt

The valve regulator controls the burner pressure which should be checked at the pressure test point.

Turn captured screw counter clockwise two or three turns

and then place tubing to pressure gauge over test point

(use test point “OUT” closest to control knob). After taking

pressure reading, be sure and turn captured screw clock-

wise rmly to re-seal. Do no over torque. Check for gas leaks. See Figure 4.2.

Test Port “OUT”

Test Port ‘A’

Figure 4.3 Pressure Test Point Location

Figure 4.2 - Pressure Test Point Location Millivolt Control

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/1916

Electrical Information

A. General Information

WARNING! Risk of Shock or Explosion! DO NOT wire 110-120 VAC to the valve or to the appliance wall switch. Incorrect wiring will damage controls.

NOTICE: This appliance must be electrically wired and grounded in accordance with local codes or, in the absence of local codes, with National Electric Code ANSI/NFPA 70-latest edition.

• Wire the appliance junction box to unswitched 110120 VAC. This is required for proper operation of the appliance.

• A 110-120 VAC circuit for this product must be protected

with ground-fault circuit-interrupter protection, in compliance with the applicable electrical codes, when it is installed in locations such as in bathrooms or near

sinks.

• Low voltage and 110/120 VAC voltage cannot be shared within the same wall box.

Electrical Service and Repair

WARNING! Risk of Shock! Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

WARNING! Risk of Shock! Replace damaged wire with type 105º C rated wire. Wire must have high temperature insulation.

Label all wires before disconnecting when servicing controls. Wiring errors can cause improper and dangerous operation.

CAUTION

WARNING

Do not connect wall switch to 110 V circuit.

WARNING

Electrical connections should only be performed

by a qualied, licensed electrician. Main power

must be off when connecting to main electrical power supply or performing service. All wiring shall be in compliance with all local, city and state codes. The 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 (latest edition) and Canadian Electrical Code, CSA C22.1.

Accessories Requirements

• This appliance may be used with a wall switch, or optional wall mounted thermostat and/or a remote control.

Wiring for optional Hearth & Home Technologies approved accessories should be done now to avoid reconstruction. Follow instructions that come with those accessories.

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/19

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

CAUTION

The millivolt valve is a self-powered combination gas control THAT DOES NOT REQUIRE 110 VAC TO OPERATE.

On/Off Switch or Optional Wall Switch, Remote or T-Stat

B. Connect Optional Wall Switch or Thermostat (vent free application only)

1. Use 18 awg, two-wire cable, 15 feet maximum length.

2. At one end of the cable, connect both wires to the wall switch or thermostat. At the other end, connect one wire to TP/TH and one wire to TH, using fork terminal or connect the wall switch/thermostat to the two male (0.25") terminals on the left side of the unit. The color of the wires does not matter.

ODS Pilot

Thermopile

Wires

ODS Pilot

TH = 3

TP = 1

TP/TH = 2

Log Switch

Figure 5.1 - Wiring Diagram

NOTE: Log switch wires are not factory connected. Connect log switch wires to the TP/TH and TH valve terminals as shown.

Millivolt

Valve

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/1918

C. Connect Remote Receiver

1. Set remote receiver. See instructions included in receiver kit.

2. Unplug the two terminals for the log switch from the

valve, connect the piggy back terminal of the receiver

to the TH and TP/TH on the valve. Slide the terminal

of the log switch onto the piggy back terminal on the receiver

NOTE: Do not allow wires to touch grate or burner.

NOTE: Heat reduces battery life. You can protect the receiver and extend battery life by mounting receiver

in wall or other location outside the replace.

D. Check System Operation

The millivolt system and individual components may be checked with a millivolt meter having a 0-1000 mV range.

Conduct each check shown in chart below by connecting

meter test leads to terminals as indicated.

1. Complete Millivolt System Check

(“A” Reading - Thermostat contacts CLOSED -

Control Knob “ON” - Main burner should turn ON)

a. If the reading is more than 175 millivolts and the

automatic valve still does not come on, replace the

control.

b. If the closed circuit reading (“A” reading) is less than

175 millivolts, determine cause for low reading, pro-

ceed to Section B below.

2. Thermopile Output Reading Check (“B” Reading - Thermostat contacts OPEN - Main burner OFF)

1. Check gas pressure to the unit. If gas pressure is

within minimum and maximum on data plate, then check pilot voltage, 500 millivolts minimum. If the

minimum millivolt reading is not obtainable, replace

pilot.

Check

Test To Test

Connect Meter Leads

to Terminals

Switch or Thermostat

Contacts Meter Should Read

A Complete System 2 and 3 Closed Minimum 175

B Thermopile Output 1 and 2 Open Minimum 500

Remote Wire

Connectors

Remote Wire

Connectors

Figure 5.2 - Installing Remote Receiver

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/19

TP/TH = 2

TP = 1 TH = 3

Valve

Remote Receiver

E. Wiring Requirements

Intellire™ Plus ODS Ignition System Wiring

• Wire the appliance junction box to 110-120 VAC for proper operation of the appliance.

WARNING! Risk of Shock or Explosion! DO NOT wire IFP ODS controlled appliance junction box to a switched circuit. Incorrect wiring will override IFP ODS safety lockout.

• Refer to Figure 5.4, IFP ODS Wiring Diagram.

• This appliance is equipped with an Intellire™ Plus control valve which operates on a 6 volt/1.5 AMP system.

• Install 4 AA cell batteries into the battery pack before use. See Figure 5.3

THERMOCOUPLE MODULE

Battery Pack

Figure 5.3 Battery Pack Location

PILOT

IGNITOR

THERMOCOUPLE

BLACK

(GROUND)

ORANGE

(PILOT)

19093-Thermocouple Module Wire

FLAME

MODULATION

CONTROL MODULE

RED

BLACK

BROWN

GREEN

(MAIN)

ORANGE

WHITE

RED

BROWN/BLACK

OPTIONAL ON/OFF

SWITCH

THERMOCOUPLE

IGNITOR

GRAY

19026-GM931 Control Box ODS

BATTERY PACK

RC300 4.5V DC (AAA X 3)

6V DC

Figure 5.4 IntelliFire™ Plus ODS Wiring Diagram (Battery Only)

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/1920

F. Detailed Component Operating Instruc-

tions— Intellire™ Plus ODS (Battery

Only)

Control Module Operation

1. The control module has an ON/OFF/REMOTE selector switch that must be set. See Figure 5.5.

OFF Position: Appliance will ignore all power inputs and

will not respond to any commands from a wall switch or

remote. The unit should be in the OFF position during

installation, service, battery installation, fuel conversion,

and in the event that the control goes into LOCK-OUT mode as a result of an error code.

ON Position: Appliance will ignite and run continuously

in the HI ame setting, with no adjustment in ame output. This mode of operation is primarily used for initial installation.

REMOTE Position: Appliance will initiate commands

from an optional wired wall switch and/or the wireless remote (RC300).

2. If using a wired wall switch with the module in REMOTE

mode, the appliance will ignite and run continuously in

the HI ame setting, with no adjustment in ame output.

3. The control module has safety feature that automatically

shuts down the heater after 9 hours of continuous

operation without receiving a command from the RC300 remote.

4. If you intend to use both an optional wired wall switch and the RC300 remote control to operate your replace,

the wall switch will override any commands given by

the remote.

5. Battery life will be shortened if the ame adjustment feature is used frequently on the RC300 remote control.

6. Module Reset

This module may lock-out under certain conditions.

When this occurs, the appliance will not ignite or

respond to commands. The module will go into

lock-out mode by emitting three audible beeps, then

continuously displaying a RED/GREEN error code at its status indicator LED.

• Locate the module selector switch. (See Figure 5.5).

• Set the module selector switch to the OFF position.

• Wait ve (5) minutes to allow possible accumulated gas to clear.

• Set the module selector switch to ON or REMOTE position.

• Start the appliance.

WARNING! Risk of Explosion! DO NOT press the mod-

ule reset switch more than one time within a ve minute time period. Gas could accumulate in rebox. Call a qualied service technician.

MODULE

SELECTOR SWITCH

STATUS

INDICATOR LED

Figure 5.5 Control Module

NG/LP GAS-TYPE SELECTOR SWITCH

Nine Hour Safety Shutdown Feature

The appliance has a safety feature that automatically

shuts down the heater after nine hours of continuous operation without receiving a command from the wall

switch or optional remote.

Appliance ON/OFF

Use the IntelliFire™ Plus Remote Control to control the ON/OFF function of the appliance. Follow instructions included with the remote control. If desired, a wall switch may be installed to control the ON/OFF function of the appliance.

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/19

Gas Log Sets

A. Grate and Log Installation

WARNING

The positioning of the logs is critical to the safe and clean operation of this heater. Sooting and other problems may result if the logs are not properly

and rmly positioned in the appliance. Never add

additional logs or embellishments such as pine cones, vermiculite or rock wool to the heater. Only use the logs and rock wool supplied with the unit.

Failure to position the parts in accordance with

diagrams below or to use only parts specically

approved for this heater may result in property damage or personal injury.

Key Hole

Slot

BEFORE YOU BEGIN

This unit is supplied with ceramic ber logs. Do not handle these logs with your bare hands. Always wear gloves to

prevent skin irritation from ceramic bers. After handling the logs, wash your hands gently with soap and water

to remove any traces of bers.

CAST IRON GRATE INSTALLATION

Install the cast iron grate by inserting screw head on back

of right side of grate into the “I” shaped slot on front right corner of unit. After moving screw head to the bottom of the “I” slot, insert the screw head on the back of the left side of grate into the keyhole slot on the left front of unit. See Figure 6.1.

Cast Iron Grate

Figure 6.1 - Grate Installation

I Slot

Cast Iron Grate

Screw Head

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/1922

WARNING

• Gloves are recommended when handling logs to

prevent skin irritation from loose bers. Logs

are fragile - handle with care.

• Use only rock wool provided with log set.

• DO NOT ADD ADDITIONAL ROCK WOOL.

Wash hands after placing rock wool. Itching may occur.

Right Front Log #2

NOTE: Installation instructions are the same for 18", 24" and 30" log sets. Pictures used in this instruction illustrate the 24" set. Some variation may exist between the images and the set included with the instructions.

Dime-sized pieces

of rock wool

Figure 6.2 - Rock Wool Placement

B. INSTALL 18", 24" AND 30" (F, R) BERKLEY OAK LOGS PLACEMENT

1. Place the #1 log (the “chunk”) on the grate bar right side of the burner adjacent to the controls. See Figure 6.3 .

2. Place front right log (#2) on right pin located on burner and right grate bar. See Figure 6.4. Slide Log #1 for- ward so that it is tight against log #2.

Figure 6.4 - Log #2 Placement

3. Place right rear log (#3) on pin located on rear support bracket and rest left side of log on front right log. See Figure 6.5.

Right Rear

Log #3

Figure 6.5 - Log #3 Placement

4. Place left rear log (#4) on pin located on rear support bracket on left side. See Figure 6.6.

Left Rear

Log #4

Figure 6.3 - Log #1 Placement

Ember Chunk Log #1

Figure 6.6 - Log #4 Placement

Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. B • 11/19

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Monessen Hearth Natural Blaze, NB18PV, NB18NV, NB24PV, NB18NIF Owner's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual