Mr. Heater MHVFB30NGT, MHVFB20NGT User Manual

OPERATING INSTRUCTIONS AND OWNER’S MANUAL

READ INSTRUCTIONS CAREFULLY: Read and follow all instructions. Place instructions in a safe

place for future reference. Do not allow anyone who has not read these instructions to assemble, light, adjust or operate the heater.

INSTALLER: Leave this manual with the appliance. CONSUMER: Retain this manual for future reference.

UNVENTED NATURAL GAS FIRED ROOM HEATER

Plaque Heaters

MHVFRD20NGBT

(BLOWER INCLUDED)

MHVFRD20NGT

(BLOWER SOLD SEPARATE)

MHVFRD30NGBT

(BLOWER INCLUDED)

MHVFRD30NGT

(BLOWER SOLD SEPARATE)

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

- Do not store or use gasoline or other ﬂ ammable vapors and liquids in the vicinity of this or any other appliance.

- WHAT TO DO IF YOU SMELL GAS

• Shut off gas supply

• Do not try to light any appliance

• Do not touch an 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 ﬁ re department.

- Installation and service must be performed by a qualiﬁ ed installer, service agency, or the gas supplier.

Blue Flame Heaters

MHVFBF20NGBT

(BLOWER INCLUDED)

MHVFBF20NGT

(BLOWER SOLD SEPARATE)

MHVFBF30NGBT

(BLOWER INCLUDED)

MHVFBF30NGT

(BLOWER SOLD SEPARATE)

WARNING: This is an unvented gas-ﬁ red 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 Fresh Air for Combustion and Ventilation section on page 4 of this manual.

WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual for correct installation and operational procedures. For assistance or additional information consult a qualiﬁ ed installer, service agency, or gas supplier.

This appliance may be installed in an aftermarket permanently 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 any other gas.

MR. HEATER, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 · 800-251-0001

2016 - CB

WARNINGS IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate, or

service this heater. Improper use of this heater can cause serious injury or death from burns, ﬁ re, explosion, electrical shock, and carbon monoxide poisoning.

WARNING: This appliance is equipped for natural gas. Field conversion is not permitted.

WARNING: Do not use any accessory not approved for use with this heater.

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

• Do not place clothing or other ﬂ ammable ma- terial on or near the appliance.

• Due to high temperatures, heater should be kept out of trafﬁ c and away from furniture and draperies.

• Surface of heater becomes very hot when running. Keep children and adults away from hot surfaces to avoid burns or clothing ignition. Heater will remain hot for a time after shutdown. Allow heater surfaces to cool before handling.

• Young children should be carefully supervised when they are in the same room with heater.

• Make sure grille guard is in place before running heater. If screen or grille guard is removed for servicing it must be replaced prior to operating the heater.

• Keep the appliance area clear and free from combustible materials, gasoline, and other ﬂ ammable vapors and liquids.

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

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

CONTENTS

WARNINGS ........................................................................ 2

SPECIFICATIONS .................................................................3

PRECAUTIONS ....................................................................3

IGNITION SYSTEM BATTERY INSTALLATION ....................... 4

BLOWER FAN CONTROL SWITCH OPERATION ....................4

DETERMINING THE TYPE OF HEATER LOCATION SPACE .....5

INSTALLATION ...................................................................6

FASTENING HEATER TO WALL ............................................7

FLOOR MOUNTING AWAY FROM WALL .............................8

CONNECTING TO GAS SUPPLY ........................................... 8

OPERATING YOUR HEATER ............................................... 10

CLEANING AND MAINTENANCE .......................................11

TROUBLESHOOTING ........................................................ 14

EXPLODED-VIEW PARTS DRAWING ................................... 16

PARTS LIST ....................................................................... 17

WARRANTY .................................................................... 20

SOCIAL MEDIA

In order to provide the best service possible Mr. Heater is now giving you more ways to get in touch with us:

WEBSITE: Mr. HeaterÊs full line of product are now at:

WWW.MRHEATER.COM

FACEBOOK: Find us on Facebook

TWITTER: Find us on twitter

YouTube: There are now informational videos on YouTube.

Unvented Natural Gas Vent Free Room Heaters

Installation Instructions and Owner’s Manual

SPECIFICATIONS

**Operating heater above elevations of 4,500 feet could cause pilot/ODS to shutdown heater.**

MHVFRD20TB /

MHVFRD20T NG BTU (Available) 20,000 30,000 20,000 30,000 Type of Gas Natural Gas Only Natural Gas Only Natural Gas Only Natural Gas Only Ignition Battery ignitor (1-AA) Battery ignitor (1-AA) Battery ignitor (1-AA) Battery ignitor (1-AA) Pressure Regulator Setting 4.5 Inches of Water 4.5 Inches of Water 4.5 Inches of Water 4.5 Inches of Water Inlet Gas Pressure (Maximum) 14 Inches of Water 14 Inches of Water 14 Inches of Water 14 Inches of Water Inlet Gas Pressure (Minimum) 7 Inches of Water 7 Inches of Water 9 Inches of Water 9 Inches of Water Electrical Rating /Blower

Thermostatic Control Yes Yes Yes Yes

Top 36” (915cm) 36” (915cm) 36” (915cm) 36” (915cm) Sides 10” (254cm) 10” (254cm) 10” (254cm) 10” (254cm) Floor (min to top of carpet) 3” (76cm) 3” (76cm) 3” (76cm) 3” (76cm) Fabric / ﬂ ammable objects 36” (915cm) 36” (915cm) 36” (915cm) 36” (915cm)

120V, 60Hz , 1

MHVFRD30TB / MHVFRD30T NG

120V, 60Hz , 1 120V, 60Hz , 1 120V, 60Hz , 1

Clearances: inches (mm)

MHVFBF20TB / MHVFBF20 NG

MHVFBF30TB / MHVFBF30T NG

PRECAUTIONS:

1. 20,000 or 30,00 BTU heater may not be installed in a bedroom or bathroom, or any place where a strong wind would shut down the appliance.

2. This heater needs outside ventilation air to run properly. The Oxygen Depletion Sensor (ODS) safety shutoff system shuts down the heater if not enough fresh air is available. See Fresh Air for Combustion and Ventilation, pages 4 through 6.

WARNING: An unvented heater having an input

of more than 10,000 Btu/hr (2 931W) shall not be installed in a bedroom or bathroom.

3. Keep all air openings in heater clear, free of debris or any blockage. This will insure that enough air for proper combustion enters the heater.

4. If heater shuts off, do not relight until you provide fresh, outside air. If heater keeps shutting off, it requires servicing.

5. Turn off and unplug heater and let cool before servicing. Only a qualiﬁ ed service person should service and repair heater.

6. Do not run heater:

• Where ﬂ ammable liquids or vapors are used or stored

• During dusty conditions.

7. Before using furniture polish, wax, carpet cleaner or similar products, turn heater off. If heated the vapors from these products may create a white powder residue within burner box or on adjacent walls or furniture.

8. Do not use heater if any part has been underwater. Immediately call a qualiﬁ ed service technician to inspect the room heater and to replace any part of the control system and any gas control which has been underwater.

9. Operating heater above elevations of 4,500 feet

could cause pilot/ODS to shutdown heater.

10. Always run heater with control knob in a locked position. Never set control knob between locked positions. Poor combustion and higher levels of carbon monoxide may result if control knob is left between locked positions.

DANGER: Carbon monoxide poisoning may lead to death.

Carbon Monoxide Poisoning:

Early signs of carbon monoxide poisoning resemble the ﬂ u, with headaches, dizziness, or nausea. If you have these signs, the heater may not be working properly. Get fresh air at once! Have heater serviced. Some people are more affected by carbon monoxide than others. These include pregnant women, persons with heart or lung disease or anemia, those under the inﬂ uence of alcohol, and those at high altitudes.

Natural Gas:

Raw natural gas is odorless. An odor making agent is added to natural gas, which helps you detect a natural gas leak. However the odor added to natural gas can fade. So natural gas may be present even though no odor is detected. Make certain you read and understand all warnings. Keep this manual for reference. It is your guide to safe and proper operation of this heater.

Unvented Natural Gas Vent Free Room Heaters

Installation Instructions and Owner’s Manual

Product Features

Fan Blower Switch

(located on back of heater)

Burners

Ignitor Button

Control Knob

FRESH AIR FOR COMBUSTION AND VENTILATION

WARNING: This heater shall not be installed in

a conﬁ ned space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.

Grill

Heater Cabinet

Front Panel

*Blower not included on all units

Figure 1

SAFETY DEVICE

This heater has a pilot with an Oxygen Depletion Sensor (ODS) safety shut off system. The ODS/pilot shuts off the heater if there is not enough fresh air.

IGNITION SYSTEM / BATTERY INSTALLATION

– The heater is equipped with an electronic manual ignitor. This system requires no matches, or other source to light heater, but does require one AA battery to operate ignitor. (AA Battery included).

To install or replace battery unscrew the ignitor cap (red button), insert battery positive (+) terminal up

and replace cap. (AA Battery included)

THERMOSTATIC CONTROL

These heaters have a control valve with a thermostat sensing bulb. This results in the greatest heater comfort and may result in lower bills.

BLOWER FAN CONTROL SWITCH OPERATION

On models equipped with an electrical blower. The blower switch has three positions: MANUAL, OFF and AUT O. In AUTO, the blower will turn on and off as the heater cycles on and off. On MANUAL, the blower will run continuously. To turn blower off, use the OFF position.

LOCAL CODES

Install and use heater with care. Installation must conform to local codes or in the ab-

sences of local codes, use the latest edition of National Fuel Gas Code ANSI Z223.1/NFPA 54.

UNPACKING

1. Remove heater from carton.

2. Remove all protective packaging applied to heater for shipment.

3. Check heater for any shipping damage. If heater is damaged, promptly inform dealer where you bought heater.

EST ABLISHING ADEQUATE VENTILATION

The following are excerpts from National Fuel Gas Code, NFPA 54/ ANSI Z223.1, Section 5.3, Air for Combustion and Ventilation. All spaces in homes fall

into one of the three following ventilation classiﬁ cations:

1. Unusually Tight Construction

2. Unconﬁ ned Space

3. Conﬁ ned Space

This heater must not be installed in a conﬁ ned space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air. The information on pages 4 through 6 will help you classify your space and provide adequate ventilation.

Unusually Tight Construction

If your home meets all of the three following criteria you must provide additional fresh air. See V entilation Air from Outdoors, page 6.

Unusually tight construction is deﬁ ned as construction where:

a. Walls and ceilings exposed to the outside atmo-

sphere have a continuous water vapor retarder with a rating of one perm (6 x 10

-11

kg per pa-sec-m2) or

less with openings gasketed or sealed and

b. Weather stripping has been added on operable

windows and doors, and

c. Caulking or sealants are applied to areas such

as joints around windows and door frames, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and gas lines, and at other openings.

If your home does not meet all of the three criteria above, see Determine the Type of Heater Location Space, page 5.

Conﬁ ned Space and Unconﬁ ned Space

The National Fuel Gas Code, NFPA 54/ ANSI Z223.1

deﬁ nes a conﬁ ned 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 unconﬁ 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 communicating directly with the space in which the appliances are installed*, through openings not furnished with doors, are considered a part of the unconﬁ ned space.

Unvented Natural Gas Vent Free Room Heaters

Installation Instructions and Owner’s Manual

*Adjoining rooms are communication only if there are odorless passageways or ventilation grills between them.

DETERMINING THE TYPE OF HEATER LOCATION SPACE:

Use this method to determine if you have a conﬁ ned or unconﬁ ned space.

Note: the space includes the room in which you install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.

1. Find the volume of the space by multiplying room

length x width x height.

Example: Space size 18ft (length) x 18ft. (width) x 8ft. (height) = 2592

If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of the space.

2. Divide the space volume by 50 cubic feet to deter-

mine the maximum Btu/hr the space can support.

Example: 2592 cu.ft. (volume of space) / 50 cu.ft. =

51.8 or 51,800 (maximum Btu/hr the space

can support)

WARNING: This heater shall not be installed in a room or space unless the required volume of indoor combustion air is provided by the method described in the National Fuel Gas Code, ANSI Z223.1/NFPA 54, the International Fuel Gas Code, or applicable local codes.

3. Add the Btu/hr of all the fuel-burning appliances

in the space such as, Vent–free heater, Gas water heater, Gas furnace, Vented gas heater, Gas ﬁ replace logs, and Other gas appliances*

*Do not include direct-vent gas appliances. Directvent draws combustion air from the outdoors and vents to the outdoors.

Example: Gas water heater 40,000 Btu/hr Vent Free Heater + 20,000 Btu/hr Total =60,000 Btu/hr

4. Compare the maximum Btu/hr the space can support

with the actual amount of Btu/hr used.

Example: 51,800 Btu/hr (maximum Btu/hr the space can support)

60,000 Btu/hr (Actual amount of Btu/hr used)

The space in the above example is a conﬁ ned space because the actual Btu/hr used is more than the maximum Btu/hr the space can support.

You must provide additional fresh air. Your options are as follows:

A. Rework worksheet, and the space of an adjoining

room. If the extra space provides an unconﬁ ned space, remove door to adjoining room or add ventilation grills between the rooms. See Ventilation Air From Inside Building (Figure 2).

B. Vent room directly to the outdoors. See Ventilation

Air From Outdoors (Figure 3).

C. Install a lower Btu/hr heater if lower Btu/hr size

makes room unconﬁ ned.

If actual Btu/hr used is less than the maximum Btu/ hr the space can support, the space is an unconﬁ ned space. You will need no additional fresh air ventilation.

VENTILA TION AIR Ventilation from Inside Building

This fresh air would come from an adjoining unconﬁ ned space. When ventilation to an adjoining unconﬁ ned space, you must provide two permanent openings: one within 12” of the ceiling and one within 12” of the ﬂ oor on the wall connecting the two spaces (see options 1 & 2 of ﬁ g. 2). You can also remove door into adjoin- ing room (see option3, ﬁ g 2). Follow the National Fuel Gas Code NFPA 54/ ANSI Z223.1, Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills or ducts.

Figure 2.

12”

Ventilation Gills into Adjoining Room Option 1

OUTLET AIR

INLET AIR

Or remove door into Adjoining Room Option 3

Ventilation Gills into Adjoining Room - Option 2

12”

VENTILATION AIR

VENTILATED ATTIC

TO A TTIC

TO CRAWL SPACE

VENTILATION CRAWL SPACE

Figure 3.

Unvented Natural Gas Vent Free Room Heaters

Installation Instructions and Owner’s Manual

WARNING: Rework worksheet, adding the space of the adjoining unconﬁ ned space. The combined space must have enough fresh air to supply all appliance in both spaces.

Ventilation from Outdoors

If necessary provide extra fresh air by using ventilation grills or ducts. Connect these items directly to the outdoors or spaces open to the outdoors. These include attics* and crawl spaces. Follow the National Fuel Gas Code NFPA 54/ ANSI Z223.1, Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills or ducts.

*IMPORTANT: Do not provide openings for inlet or outlet into attic. If attic has a thermostat-controlled power vent, heated air entering the attic will activate the power vent.

IMPORTANT: Vent-free heaters add moisture to the air. Although this is beneﬁ cial, installing heater in rooms without enough ventilation air may cause mildew to form from too much moisture. See Fresh Air for Combustion and Ventilation, pages 4 through

INSTALLATION

WARNING: Any change to this heater or its

controls can be dangerous.

NOTICE: This appliance is intended for supplemental heating. Use this heater along with your primary heating system. Do not install this heater as your primary heat source. If you have a central heating system, you may run system’s circulating blower while using heater. This will help circulate the heat throughout the house. In the event of a power outage, you can use this heater as your primary heat source for the duration of the outage.

WARNING: A qualiﬁ ed service person must install heater. Follow all local codes.

CHECK GAS TYPE

Use only natural gas. If your gas supply is not natural gas, do not install heater. Call dealer where you bought

heater for proper type heater.

THIS INSTALLATION REQUIRES:

Before installing heater, make sure you have the items listed below:

• Piping (check local codes)

• Sealant (resistant to natural gas)

• Equipment shutoff valve*

*A CSA/AGA certiﬁ ed equipment shutoff valve with 1/8” NPT tap is an acceptable alternative to test gauge connection. Purchase a CSA/AGA certiﬁ ed equipment shutoff valve from your dealer .

LOCATING HEATER

This heater is designed to be mounted on the wall. The heater can also be located on a non-combustible ﬂ oor, away from a wall by using the ﬂ oor mounting stands in- cluded with the heater. If installed on combustible ﬂ oor- ing such as carpeting, tile or other combustible material other than wood ﬂ ooring, the heater must be placed on a wood panel the full width and depth of the appliance.

For convenience and efﬁ ciency, install the heater:

• Where there is easy access for operation,

inspection, and service

• In the coldest part of the room.

• If planning to use fan, locate heater near an

electrical outlet.

CAUTION: If you install the heater in a home garage: Heater pilot and burner must be at least 18 inches above ﬂ oor . Locate heater where moving vehicle will not hit it.

CAUTION: This heater creates warm air currents. These currents move heat to wall surfaces next to heater. Installing heater next to vinyl or cloth wall covering or operating heater where impurities (such as tobacco smoke, aromatic candles, cleaning ﬂ uids, oil or kerosene lamps, etc.) are present in the air may discolor walls.

WARNING: Never install the heater:

• In a bedroom (RD20NGT, RD30NGT, BF20NGT or BF30NGT)

• In a recreational vehicle ·.

• Where curtains, furniture, clothing, or other

ﬂ ammable objects are less than 36 inches from the front, top, or sides of the heater.

• As a ﬁ replace insert

• In high-trafﬁ c areas

• In windy or drafty areas

WARNING: Heater must be mounted to maintain the minimum clearances shown in Figure 4. If possible, provide greater clearances from the ﬂ oor, ceiling, and joining walls.

• Ground joint union

• Test gauge connection*

• Sediment trap

• Tee joint

• Pipe wrench

Unvented Natural Gas Vent Free Room Heaters

Installation Instructions and Owner’s Manual

+ 14 hidden pages