Advertisement
Installer: Leave this manual with the appliance. Consumer: Retain this manual for future reference.
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.
Plaque Heaters
MHVFR20TB NG
MHVFR30TB NG
Blue Flame Heaters
MHVFB20TB NG
MHVFB30TB NG
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.
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 Fresh Air for Combustion and Ventilation section of this manual.
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 qualified 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.
*Aftermarket completion of sale, not for the purpose of resale, from the manufacturer.
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, fire, explosion, electrical shock, and carbon monoxide poisoning.
This appliance is equipped for (natural or propane) gas. Field conversion is not permitted.
Do not use any accessory not approved for use with this heater.
Any change to this heater or its controls can be dangerous.
IR20TB NG | IR30TB NG | BF20TB NG | BF30TB 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 | 5.0 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 | 120V, 60Hz, 1 ![]() |
120V, 60Hz, 1 ![]() |
120V, 60Hz, 1 ![]() |
120V, 60Hz, 1 ![]() |
Burners / Orifice nozzles | 3 | 4 | 1 | 1 |
Thermostatic Control | Yes | Yes | Yes | Yes |
Clearances: inches (mm) | ||||
Top | 36" (915cm) | 36" (915cm) | 36" (915cm) | 36" (915cm) |
Sides | 10.5" (267cm) | 10.5" (267cm) | 10.5" (267cm) | 10.5" (267cm) |
Floor (min to top of carpet) | 2" (51cm) | 2" (51cm) | 2" (51cm) | 2" (51cm) |
Fabric / flammable objects | 36" (915cm) | 36" (915cm) | 36" (915cm) | 36" (915cm) |
Carbon monoxide poisoning may lead to death.
Carbon Monoxide Poisoning:
Early signs of carbon monoxide poisoning resemble the flu, 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 influence 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.
Product Features
Figure 1
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.
– 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)
These heaters have a control valve with a thermostat sensing bulb. This results in the greatest heater comfort and may result in lower bills.
These heaters also include an electrical blower. The blower switch has three positions: MANUAL, OFF and AUTO. 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.
Install and use heater with care.
Installation must conform to local codes or in the absences of local codes, use the latest edition of National Fuel Gas Code ANSI Z223.1/NFPA 54.
This heater shall not be installed in a confined 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.
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 classifications:
This heater must not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air.
Unusually Tight Construction
If your home meets all of the three following criteria you must provide additional fresh air. See Ventilation Air from Outdoors.
Unusually tight construction is defined as construction where:
If your home does not meet all of the three criteria above, see Determing the Type of Heater Location Space.
Confined Space and Unconfined Space
The National Fuel Gas Code, NFPA 54/ ANSI Z223.1 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.
*Adjoining rooms are communication only if there are doorless passageways or ventilation grills between them.
Use this method to determine if you have a confined or unconfined 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.
You must provide additional fresh air. Your options are as follows:
Ventilation from Inside Building
This fresh air would come from an adjoining unconfined space. When ventilation to an adjoining unconfined space, you must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor on the wall connecting the two spaces (see options 1 & 2 of fig. 2). You can also remove door into adjoining room (see option3, fig 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.
Rework worksheet, adding the space of the adjoining unconfined 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.
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.
Vent-free heaters add moisture to the air. Although this is beneficial, installing heater in rooms without enough ventilation air may cause mildew to form from too much moisture. See Fresh Air for Combustion and Ventilation.
NOTICE: This heater is intended for the use as supplemental heat. 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.
A qualified service person must install heater. Follow all local codes.
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.
Before installing heater, make sure you have the items listed below:
*A CSA/AGA certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase a CSA/AGA certified equipment shutoff valve from your dealer.
This heater is designed to be mounted on the wall. The heater can also be located on a non-combustible floor, away from a wall by using the floor mounting stands included with the heater. If installed on combustible flooring such as carpeting, tile or other combustible material other than wood flooring, the heater must be placed on a wood panel the full width and depth of the appliance.
For convenience and efficiency, install the heater:
If you install the heater in a home garage: Heater pilot and burner must be at least 18 inches above floor. Locate heater where moving vehicle will not hit it.
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 fluids, oil or kerosene lamps, etc.) are present in the air may discolor walls.
Never install the heater:
Heater must be mounted to maintain the minimum clearances shown in Figure 4. If possible, provide greater clearances from the floor, ceiling, and joining walls.
Figure 4
Mounting Bracket
The mounting bracket in located on the back panel of heater (see figure 5). It has been taped there for shipping. Remove mounting bracket from back panel.
Figure 5
Removing Front Panel of Heater
Figure 6
Attaching Mounting Bracket to Wall
Use holes on each end of mounting bracket to attach bracket to wall. These holes are 16 inches apart. Attach mounting bracket to wall in one of two following ways.
Attaching to Wall Stud:
This way is the best providing the strongest mounting in wood frame houses.
Attaching to Wall Anchor:
This way allows you to attach mounting bracket to hollow walls (wall areas between studs) or to solid walls (concrete or masonry).
Decide which way best suits your needs. Either method will provide a secure hold for the mounting bracket.
Figure 7
Attaching to Wall Stud:
For attaching mounting bracket to wall studs
Attaching to Wall using Anchor:
For attaching mounting bracket to hollow walls (wall areas between studs) or solid walls (concrete or masonry)
Note: Wall anchors, mounting screws, and spacer are in hardware package. The hardware package is provided with heater.
Placing Heater on Mounting Bracket
Figure 9
Installing Bottom Mounting Screws
Note: Do not re-place front panel at this time. Replace front panel after making gas connections and checking for leaks.
Figure 11
Installing Support Feet (see figure 11)
A qualified service person must connect heater to gas supply. Follow all local codes.
This appliance requires a 3/8" NPT (National Pipe Thread) inlet connection to the pressure regulator. Use of floor mounting feet will require you to use a 3/8 NPT street elbow to make gas connection.
Never connect heater to private (non-utility) gas well. This gas is commonly known as well-head gas.
Check your gas line pressure before connecting heater to gas line. Gas line pressure must be no greater than 14 inches of water. If gas line pressure is higher, heater regulator damage could occur.
Use only new black iron or steel pipe. Internally-tinned copper tubing may be used in certain areas. Check your local codes. Use pipe of larger enough diameter to allow proper gas volume to heater. If pipe is too small, undue loss of pressure will occur.
Installation must include an equipment shutoff valve, union and plugged 1/8" NPT tap. Locate NPT tap within reach of test gauge hookup. NPT tap must be upstream from heater (see figure 12).
Figure 12
*A CSA/AGA certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the CSA/AGA certified equipment shutoff valve from your dealer. See Accessories.
Install an equipment shutoff valve in an accessible location. The equipment shutoff valve is for turning on or shutting off the gas to the appliance.
Apply pipe joint sealant lightly to male threads. This will prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged heater fuel train.
Use pipe joint sealant that is resistant to natural gas.
Install sediment trap in supply line as shown in figure 12. Locate sediment trap where it is within reach for cleaning. A sediment trap traps moisture and contaminants. This keeps them from going into heater. If sediment trap is not installed or is installed improperly, heater may not run correctly.
Hold pressure regulator with wrench when connecting it to gas piping and/or fittings.
Test all gas piping and connections for leaks after installing or servicing. Correct all leaks at once.
Never use an open flame to check for a gas leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.
Test pressure in Excess of ½ psig (3.5kPa)
Test Pressure Equal To or Less Than ½ psig (3.5 kPa)
Pressure Testing Heater Gas Connections:
Figure 13
Figure 14
If any original wiring as supplied with the heater must be replaced, it must be replaced with type AWG 105oC wire or its equivalent except as indicated.
Figure 15
Electrical Grounding Instructions: This heater is equipped with a three-prong (grounding) plug for your protection against shock hazard and should be plugged into a properly grounded threeprong receptacle.
FOR YOUR SAFETY READ BEFORE LIGHTING
If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.
FOR IR20NGT / IR30NGT: The thermostatic control used simply turns on and off the burner.
FOR BF20NGT / BF30NGT: The thermostatic control used modulates the flame size as the temperature gets closer to set point, then it turns off the burner upon reaching temperature.
The burner will cycle back on when room temperature drops below the set temperature. The control knob can be set to any heat level between 1 and 5. Selecting the HI setting will cause the burner to remain on.
SHUTTING OFF HEATER
SHUTTING OFF BURNER ONLY (PILOT STAYS LIT)
Check pilot flame pattern and burner flame pattern often.
Figure 21 shows a correct pilot flame pattern. Figure 22 shows an incorrect pilot flame pattern. The incorrect pilot flame pattern is not touching thermocouple. This will cause the thermocouple to cool. When the thermocouple cools, the heater will shut down. If pilot flame pattern is incorrect, as shown in Figure 22:
Turn off heater and let cool before servicing.
You must keep control areas, burner and circulation air passageways of heater clean. Inspect these areas of heater before use. Have the heater inspected yearly by a qualified service person. Heater may need more frequent cleaning due to excess lent from carpeting, bedding material, pet hair, etc.
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.
Figure 17
Note: Your heater may have either pilot assembly.
Figure 21
Correct pilot position.
Figure 22
Incorrect pilot position.
Failure to keep the primary air opening(s) of the burner(s) clean may result in sooting and property damage.
CLEANING ODS/PILOT AND BURNER
CLEANING BURNER PILOT AIR HOLE INLET
We recommend that you clean the unit ever 2,500 hours of operation or every three months. We also recommend that you keep the burner tube and pilot assembly clean and free of dust and dirt. To clean these parts we recommend using compressed air no greater than 30 psig.
This can be done by using a vacuum cleaner in the blow position, using compressed air in a can, please follow the directions on the can. If you don't follow directions on the can you could damage the burner or pilot assembly. In addition, the directions that follow should also be followed.
A yellow tip on the pilot flame indicates dust and dirt in the pilot assembly. To clean the pilot assembly find the small pilot air inlet hole about two inches from where the pilot flame comes out of the pilot assembly (see figure 25). With the unit off, lightly blow air through the air inlet hole. You may blow through a drinking straw if compressed air is not available.
Figure 25
CLEANING HEATER CABINET
Air passageways
Exterior
NOTE: All troubleshooting items are listed in order of operation and likely occurrence.
Only a qualified service person should service and repair heater.
Never use a wire needle, or similar object to clean ODS/pilot. This can damage ODS/pilot unit. 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.
If you smell gas:
Operating heater where impurities in air exist may create odors. Cleaning supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles, etc., create fumes. These fumes may mix with combustion air and create odors and possible discoloration of walls and ceilings.
OBSERVED SYMPTOM | POSSIBLE CAUSE | REMEDY |
When ignitor button is pressed in, there is no spark at pilot |
|
|
ODS/pilot lights but flame goes out when control knob is released |
|
|
When ignitor button is pressed in, there is a spark at the ODS/pilot but no ignition |
|
|
Burner does not light after ODS/pilot is lit |
|
|
Delayed ignition of burner |
|
|
Burner backfiring during operation |
|
|
Burner plaque(s) does not glow [Infrared Only] |
|
|
Slight smoke or odor during initial operation |
|
|
Heater produces a whistling noise when burner is lit |
|
|
White powder residue forming within burner box or on adjacent walls or furniture |
|
|
Heater produces unwanted odors. |
|
|
Heater shuts off in use (ODS operates) |
|
|
Gas odor even when control knob is in OFF position |
|
|
Gas odor during combustion |
|
|
Heater produces a clicking/ticking noise just after burner is lit or shut off |
|
|
Moisture/condensation noticed on windows |
|
|
USE ONLY MANUFACTURER'S REPLACEMENT PARTS. USE OF ANY OTHER PARTS COULD CAUSE INJURY OR DEATH. REPLACEMENT PARTS ARE ONLY AVAILABLE DIRECT FROM THE FACTORY AND MUST BE INSTALLED BY A QUALIFIED SERVICE AGENCY.
PURCHASING: Accessories may be purchased at any Mr. Heater local dealer or direct from the factory
Please call Toll-Free 800-251-0001
www.mrheater.com
Our office hours are 8:30 AM – 5:00 PM, EST, Monday through Friday.
Please include the model number, date of purchase, and description of problem in all communication.
Mr. Heater, Inc. warrants its heaters and accessories to be free from defects in material and workmanship for a period of 1 year from date of purchase. Mr. Heater, Inc. will repair or replace this product free of charge if it has been proven to be defective within the 1-year period, and is returned at customer expense with proof of purchase to Mr. Heater, Inc. within the warranty period.
Mr. Heater, Inc. reserves the right to make changes at any time, without notice or obligation, in colors, specifications, accessories, materials and models.
PRODUCT REGISTRATION: Thank you for your purchase.
Please log in to http://www.egiregistration.com to register your product.
Mr. Heater, Inc., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 800-251-0001
Mr. Heater is a registered trademarks of Mr. Heater, Inc.
© 2009, Mr. Heater. All rights reserved
Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.
Download Mr. Heater 30000 BTU Natural Gas MHVFR30TB NG Manual
Advertisement
Need help?
Do you have a question about the MHVFR20TB NG and is the answer not in the manual?
Questions and answers