Monessen Hearth DFS42NVC, DFS32NVC, DFS32PVC, DFS42PVC, DFS36PVC User Manual

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VENT-FREE FIREPLACE

SYSTEMS

INSTALLATION AND OPERATING

INSTRUCTIONS

MODELS:

DFS32NVC, DFS32PVC

DFS36NVC, DFS36PVC

DFS42NVC, DFS42PVC

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 10.

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

Electrical Wiring (Milli-Volt) ..................................

19

Product Features.....................................................

5

Connecting Optional Wall Switch........................

19

Operation ..............................................................

5

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

20

Specifications ..........................................................

7

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

20

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

7

Log Placement.......................................................

21

Pilot.......................................................................

7

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

25

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

7

Checking the Burner Flame .................................

26

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

8

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

27

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

9

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

27

Firebox Dimensions ..............................................

9

Milli-Volt Control Lighting Instructions.................

28

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

10

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

29

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

10

Cleaning and Servicing.........................................

29

Removing Screen ...............................................

12

Blower and Other Optional Equipment

...............30

Installing Canopy ................................................

12

Illustrated Parts Breakdown.................................

31

Location of Fireplace ............................................

13

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

31

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

14

Heater .................................................................

32

Fireplace Framing..................................................

15

Cabinet................................................................

34

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

17

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

36

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

18

Trim Installation.....................................................

38

Milli-Volt Control..................................................

18

Using Optional Outside Air Kit.............................

40

 

 

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

Back Cover

2

71D0532

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 materials, 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 ANSI Z21.11.2 Unvented Heaters.

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 10.

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

Continued on page 4

71D0532

3

IMPORTANT SAFETY INFORMATION

Continued from page 3

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 two to three hours 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 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.Never burn solid fuels in a fireplace where a unvented room heater is installed.

25.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.

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.

4

71D0532

Monessen Hearth DFS42NVC, DFS32NVC, DFS32PVC, DFS42PVC, DFS36PVC User Manual

PRODUCT FEATURES

Screen

On/Off Switch

Piezo

Control

Knobs

Figure 1 - Access to Controls

This vent-free fireplace must be mounted on the floor or on the optional fireplace hearth.

OPERATION

This unvented gas heater requires no outside venting and burns cleanly with high heating efficiency.

This zero-clearance unvented gas heater can be installed against (or recessed into) any wall that is accessible to a gas line.

71D0532

5

PRODUCT FEATURES

NATURAL GAS

Milli-Volt Pressure

Regulator Pressure Setting: 3.5" w.c.

Pilot Regulator: 3.5" w.c.

Gas Inlet Pressure: Max. 10 1/2" w. c.

Min. 5" w.c.

Model Number

Control

 

Gas Rate

 

 

Max BTU/Hr

Min BTU/Hr

DFS32NVC

MILLI-VOLT

 

38,000

26,000

DFS36NVC

MILLI-VOLT

 

38,000

26,000

DFS42NVC

MILLI-VOLT

 

38,000

26,000

PROPANE/LPG

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

Milli-Volt Pressure

Regulator Pressure Setting: 10" w.c. Gas Inlet Pressure: Max. 13" w.c.

Min. 11" w.c.

Model Number

Control

Gas Rate

Max BTU/Hr

Min BTU/Hr

DFS32PVC

MILLI-VOLT

34,000

26,000

DFS36PVC

MILLI-VOLT

34,000

26,000

DFS42PVC

MILLI-VOLT

34,000

26,000

6

71D0532

SPECIFICATIONS

IGNITION CONTROLS

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

Milli-Volt 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). Both front and rear burners are in operation

 

to provide realistic glow and yellow flame.

PILOT

 

The gas log heater is fitted with a specially designed safety pilot light (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 milli-volt gas log pilot is fitted with a milli-volt generator to provide power for remote activation.

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7

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 grate/burner assembly

Installation/operating instructions

Ceramic fiber logs

Rock wool

Plastic bag containing crushed volcanic rock

Trim kit

Canopy and five (5) mounting screws

The milli-volt controlled version of this heater is the only style designed to be operated with optional devices for ON/OFF functions. The following options may be used with the milli-volt controlled heater. These options are not packaged with the log set.

Hand held remote with receiver

Wall switch with 15' wire

Wall thermostat with 15' wire

Hand held thermostat remote with receiver

WARNING

• 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 must 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

Pipe wrench or appropriate size crescent wrench set

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

Sediment trap

Manual shutoff valve

Tee joint.

Phillips head screwdriver

8

71D0532

GENERAL INSTALLATION INFORMATION

In planning the installation for the fireplace it is necessary to determine where the unit is to be installed and whether optional accessories are desired. Gas supply piping should also be planned. The following steps represent the normal sequence of installation. Each installation is unique, however, and might require a different sequence.

1.Position fireplace in desired location. Refer to the “Location of Fireplace” and “Clearances and Height Requirements,” and “Firebox Framing” sections found in this manual. Note: Be sure all packing material has been removed from underside of the unit.

2.Install canopy and logs per instructions found in this manual. The canopy MUST be installed for safe operation of the unit.

3.Field wire main power supply to units with fan kit. Refer to the “Electrical Section” found in this manual. (Electrical connections should only be performed by an experienced, licensed certified tradesman).

D

F

E

4.Install optional ON/OFF kit on units with milli-volt control. Refer to installation instructions included with the kit and also refer to the “Electrical Wiring” section found in this manual.

5.Plumb gas line. Refer to the “Connecting the Gas” section found in this manual. (Gas connections should only be performed by an experienced, licensed / certified tradesman).

6.Complete finish wall material and/or surround.

 

DFS32NVC

DFS36NVC

DFS42NVC

 

DFS32PVC

DFS36PVC

DFS42PVC

 

 

 

 

A

37"

41"

47"

B

32"

36"

42"

C

16"

18"

18"

D

29"

32"

38"

E

18⅝"

20⅝"

20⅝"

F

23⅜"

27⅜"

33⅜"

G

13¼"

15¾"

15¾"

H

18"

17⅝"

17⅝"

I

29⅞"

34"

40"

J

7⅛"

9¾"

9¾"

K

8"

8¼"

8¼"

L

2¾"

2¼"

2¼"

Figure 2 - Firebox Dimensions with Screen and Log Sets

C

1 ¼"

 

1/4"

 

7

 

57/16"/16"

 

 

 

I

 

 

 

 

34 ½"

213/4"¾"

 

B

1/2"

 

 

 

 

 

J

2

1/2½"

 

 

6"

 

 

K

 

 

 

"

 

 

 

5

 

 

 

11 5/16"

A

G

 

 

 

 

 

L

H

71D0532

9

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

WARNING

Do not install the heater:

Where curtains, furniture, clothing, or other flammable objects are less than 42" from the front of the heater.

In high traffic areas.

In windy or drafty areas.

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/NFPA54), 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, and an unconfined 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 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.

10

71D0532

GENERAL INSTALLATION INFORMATION

Counter

Fireplace

H

W

Figure 3 - 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

+ L

2) Ft x (W) Ft x (H) Ft

x 1000

 

 

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 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/NFPA54, Section 5.3 or applicable local codes.

71D0532

11

GENERAL INSTALLATION INFORMATION

REMOVING SCREEN

Remove fireplace screen frame panel by pushing screen frame panel up and out. See Figure 4.

WARNING

Do not operate the unit without the screen frame panel and canopy installed.

Canopy

Fireplace

Screen

Figure 4 - Removing Fireplace Screen Frame Panel

NOTE: Fireplace screen must be removed to access log box and to install canopy.

INSTALLING CANOPY

1.Remove the fireplace screen as described in the previous section.

2.Align the canopy with the holes in the top frame. See Figure 5.

3.Secure screws as shown. See Figure 5.

4.Install and tighten side screws. Make sure the canopy is level and secure. Install the fireplace screen.

Figure 5 - Canopy Installation

12

71D0532

LOCATION OF FIREPLACE

Carefully select the best location for installation of your unvented fireplace. The following factors should be taken into consideration.

Clearance to side wall, ceiling, woodwork and window or other combustibles. Refer to “Clearances and Height Requirements” section on page 14. Minimum clearances to combustibles must be maintained.

Location must not be affected by drafts caused by kitchen exhaust fans, ceiling fans, return air registers for forced air furnaces / air conditioners, windows or doors.

Installation must provide adequate ventilation and combustion air.

DO NOT INSTALL THIS MODEL IN A BEDROOM OR BATHROOM.

Location should be out of high traffic areas and away from furniture and draperies due to heat from firebox.

Never obstruct the front opening of the unvented fireplace or restrict the flow of combustion and ventilation air.

Minimize modifications to existing construction. See Figure 6 below for location suggestions.

Do not install in the vicinity where gasoline or other flammable liquids may be stored. The unvented firebox must be kept clear and free from the combustible materials.

Figure 6 - Suggested Locations

71D0532

13

CLEARANCES AND HEIGHT REQUIREMENTS

WARNING

The dimensions shown in Figures 7 and 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.

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

Sidewall and ceiling clearances: The clearance from the inside of the appliance to any combustible adjacent wall should no be less than 9".

See Figure 7.

Ceiling clearance: The ceiling must be at least 42" from the top of the firebox opening. See Figure 7.

Back wall clearance: The appliance may be placed against a combustible back wall.

Floor clearance: The fireplace may not be installed onto any combustible flooring material, such as carpeting, vinyl or tile without the hearth or a minimum 22 GA (0.030") metal or a minimum 1/2" wooden base covering the entire width and depth of the base. Combustible material must be installed at least one inch away from the front face of the unit.

Mantel clearances: The canopy supplied with the unit must be installed. If a combustible mantel is installed. It must meet the clearance requirements shown in Figure 8.

Combustible material can contact top of fireplace.

12"

 

10"

 

8"

 

6"

23"

21/2"

21"

16"

19"

12"

 

N o n - c o m b u s t i b l e

material only if needed to

cover optional radiant top

panel above canopy.

Figure 8A - Minimum Mantel Clearances

 

42" Minimum

9"

9"

Minimum

Minimum

Figure 7 - Sidewall and Ceiling Clearances

Figure 8B - Mantel Heights

For Wide Brass Canopy. See pg. 35

14

71D0532

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