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4

 WARNING:

It is imperative to maintain proper operation of the 

venting system, including the masonry chimney (if 

applicable). Insufficient venting could create the 

production of excessive amounts of Carbon Monoxide 

(CO) - a colorless, odorless gas that is produced during 

incomplete combustion of any fuel. It can cause death 

without warning. Carbon monoxide poisoning can 

cause flu- like symptoms and also dizziness, fatigue, 

headaches, nausea, and irregular breathing.
If you suspect that you are experiencing CO poisoning, 

get fresh air immediately. Leave the home and call 

for assistance from a neighbor’s home.

 CAUTION:

This furnace requires unrestricted airflow for 

combustion and ventilation. For proper and safe 

operation, it is extremely important that the furnace 

receives an unobstructed flow of clean, fresh air to 

properly burn the fuel gas. If this flow of air is restricted, 

the partially burned combustion gases may create 

dangerous amounts of carbon monoxide that can 

cause personal injury or death.

•  Do not block or obstruct air openings on the furnace, air 

openings or spacings around the furnace area or the room 

or closet the furnace is in. Furniture and drapery should be 

arranged so that the supply air registers and return grilles are 

not obstructed.

•  The U.S. Consumer Product Safety Commission (CPSC) 

recommends every home have a Carbon Monoxide detector 

in hallways near the bedrooms in each sleeping area. CO 

detectors should be certified to the most recent requirements 

of the UL, IAS OR CSA Standard and should be installed, 

operated, and maintained in accordance with the detector 

manufacturers instructions.

•  If your furnace obtains its air through a pipe to the outdoors, 

do not allow the inlet of the pipe to become blocked. If the 

furnace is operated without adequate air for combustion, the 

flame roll-out switch will open, turning off the gas supply to 

the burners. This indicates that a serious problem with the 

burners has occurred and must be corrected immediately. 

Only a licensed HVAC technician can reset this switch.

•  Before remodeling near the furnace, consult with a local code 

official or the National Fuel Gas Code to make sure you will be 

in compliance with supplying adequate air for combustion. By 

erecting new walls, it is sometimes possible to inadvertently 

restrict the furnace’s air supply. You can find more information 

about supplying combustion air in the NFGC, which is available 

at many libraries.

FILTER

 WARNING:

Never operate the furnace without a filter in place. 

Accumulating dust in the return air can build up on 

internal components, resulting in loss of efficiency, 

equipment damage, and possible fire.

Keep air filters cleaned. Clean or replace filter to maintain proper 

airflow and achieve maximum efficiency. Refer to page 7 for 

Maintenance & Inspection information.

CLEARANCES TO COMBUSTIBLES

 WARNING:

Do not place combustible materials on or against 

the furnace cabinet or within 6 inches of the vent 

pipe. Furnace area must be kept clear and free of 

combustible materials, gasoline and other flammable 

vapors and liquids. A fire or explosion may result 

causing property damage, personal injury or loss of 

life. Failure to follow the safety warnings exactly could 

result in serious injury, death or property damage.

The furnace is designed to have certain clearances to combustible 

items such as wood, paper, etc. Some types of insulation are 

combustible. If your furnace is installed in an attic, near unfinished 

walls, or in other insulated space, keep area surrounding the 

furnace free of insulating material.

SOURCES OF COROSION

It is known that certain common household chemicals can 

cause heat exchanger corrosion if the vapors are pulled into 

the furnace’s burners The following is a list of chemicals that 

should not be used or stored near the furnace.
Do not store these chemicals near the furnace:

•  Permanent wave solutions

•  Chlorinated waxes and cleaners

•  Chlorine based swimming pool chemicals

•  Water softening chemicals

•  De-icing salts or chemicals

•  Carbon tetrachloride

•  Halogen type refrigerants

•  Cleaning solvents (perchloroethylene)

•  Printing inks, paint removers, varnishes, etc.

•  Hydrochloric acid

•  Cements and glues

•  Antistatic fabric softeners

•  Masonry acid washing materials

FLOOD DAMAGE

 WARNING:

Do not use this furnace if any part has been under 

water. A flood damaged furnace is extremely 

dangerous. Attempts to use the furnace can result in 

fire or explosion. A qualified service agency should 

be contacted to inspect the furnace and to replace all 

gas controls, control system parts, electrical parts that 

have been wet or the furnace if deemed necessary.

 AVERTISSEMENT:

Ne pas installer ce générateur d’air chaud si l’une de ses pièces a 

été immergée dans de l’eau. Un générateur d’air chaud endommagé 

par une inondation est extrêmement dangereux. Toute tentative 

d’utiliser le générateur d’air chaud peut entraîner un incendie 

ou une explosion. Il faut communiquer avec un organisme de 

service qualifié pour l’inspection du générateur d’air chaud et le 

remplacement de toutes pièces électriques ou parties du système 

de commande qui ont été mouillées ou immergées.

Содержание MG3P

Страница 1: ...IMPORTANT Please read all information in this manual thoroughly and become familiar with the capabilities and use of your appliance before attempting to operate or maintain this unit Pay attention to...

Страница 2: ...OD DAMAGE 4 ABOUT THE FURNACE 5 INTRODUCTION 5 CATEGORY IV CONDENSING FURNACES 5 FILTER 5 FURNACE LOCATION 5 TROUBLESHOOTING 5 COMPONENT LOCATIONS 6 STARTUP SHUTDOWN 7 STARTING THE FURNACE 7 SHUTTING...

Страница 3: ...ou les sorties de l vent de l appareil de chauffage et la prise d air ne soient enaucunefa on obstru es quellequesoitlasaison Safety markings are used frequently throughout this manual to designate a...

Страница 4: ...Never operate the furnace without a filter in place Accumulating dust in the return air can build up on internal components resulting in loss of efficiency equipment damage and possible fire Keep air...

Страница 5: ...ace operation The homeowner must make sure the condensate drain lines do not become blocked pinched or crushed If the furnace is installed in an area where temperatures fall below freezing special pre...

Страница 6: ...e B C D cabinets only Roll Out Switch Transformer Vent Limit Switch Burner Assembly Flame Sensor Roll Out Switch Finish Flange Blower Assembly behind blower panel Blower Door Switch behind blower pane...

Страница 7: ...F YOU NEED TO SHUT DOWN YOUR FURNACE FOR SERVICE OR MAINTENANCE SHUT OFF THE GAS VALVE TO THE FURNACE BEFORE TURNING OFF THE ELECTRICAL SERVICE If your installation has a manual gas shutoff valve on t...

Страница 8: ...the furnace The furnace venting system should be inspected annually by a licensed HVAC technician Vent pipe must slope upwards and be physically secured without holes or corrosion Any corroded sectio...

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