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USER’S INFORMATION MANUAL
MODEL 345MAV
CONDENSING GAS FURNACE
NOTE TO INSTALLER:
This manual must be left with the equipment user.
As an ENERGY STAR® Partner,
Bryant Heating & Cooling
Systems has determined that
this product meets the ENERGY
STAR® guidelines for energy
efficiency.
WARNING: 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
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WELCOME TO A NEW GENERATION OF COMFORT Congratulations! In light of rising energy costs, the 345MAV Multipoise Condensing Gas Furnace is among the soundest investments today’s home- owner can make. Your new furnace is truly a triumph of technology in home heating. A revolutionary design employs 2 heat exchangers to “squeeze” out the maxi- mum amount of heat from the fuel con- sumed. In fact, your new furnace is so efficient, 90%* of the heat generated during combustion is c
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FURNACE COMPONENTS 13 1 Burner sight glass for viewing burner flame. 1 2 2 Burner assembly (inside). Operates with energy- saving inshot burners and hot surface ignitor for safe, 3 dependable heating. 4 14 3 Combustion-air intake connection (right or left side). 5 6 6 4 Redundant gas valve. Safe, efficient. Features 1 gas control with 2 internal shutoff valves. 7 15 5 Junction box for 115-v electrical power supply. 8 16 9 6 Vent outlet. Uses PVC pipe to carry vent gases from the furnace
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NOTE: The qualified installer IMPORTANT FACTS STARTING YOUR or agency must use only factory- Your gas furnace uses air adjacent to the FURNACE authorized replacement parts, kits, furnace for combustion and vents to the Instead of a continuously burning pilot and accessories when modifying this outside. Do not enclose it in an airtight flame which wastes valuable energy, product. room or seal it behind solid doors. It your furnace uses an automatic, hot m
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E S O L C O
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F F 7. Replace main furnace door. STEPS FOR STARTING (See Fig. 14.) YOUR FURNACE 8. Turn on electrical supply to the fur- 1. Set your room thermostat to the low- nace and wait 1 minute. est temperature setting. (See Fig. 6.) (See Fig. 15.) 9. Open the external manual gas ® valve. (See Fig. 16.) 10.Set room thermostat to a tem- perature slightly above room temperature. This will auto- matically signal the furnace to start. 12 11.When the furnace r
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F F PERFORMING ROUTINE MAINTENANCE With proper maintenance and care, your furnace will operate economically and dependably. Instructions for basic main- tenance are found on this and the follow- ing pages. However, before beginning maintenance, follow these safety pre- cautions: 18 The following procedures must be ! WARNING followed: Turn off electrical power sup- 1. Set your room thermostat to the ply to your furnace before re- lowest temperature s
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27 25 21 22 NOTE: It will be necessary to remove 2 screws. 4. Remove air filter from furnace. 26 • AIR FILTER(S) LOCATED IN 5. Inspect the filter. If torn, replace it. BOTTOM: NOTE: If washable filter that was a. Slide filter retainer sideways until shipped with the furnace has been it is free of latch. (See Fig. 23.) replaced with an electronic air cleaner 28 b. Slide air filter out of furnace. (EAC), refer to the EAC Owner’s Man- (See Fig. 24.) ual for maintenance informat
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1. Turn off gas and electrical supplies observe a suspected malfunction, 6. Insert field-supplied funnel into tube. to the furnace and remove or the burner flames are not clear the main furnace door. (See Fig. 7, blue, call your dealer. 8, and 9.) 2. Remove burner enclosure front. (See Fig. 29 or 30.) Inspect the gas burners and ignitor area for dirt, rust, soot, or scale. ! CAUTION If dirt, rust, soot, or scale accu- mulations are found, call your dealer. Do not operate you
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NOTE: Turn off electrical supply • Inspect all condensate drain tubes A CHECK-UP and condensate trap assembly for before continuing with checklist. CHECKLIST leaks. The condensate removal system Your furnace represents an important • Is control switch or knob on gas should be cleaned annually by a quali- investment in your family’s comfort valve in ON position? (Follow start-up fied service agency. Refer to the Ser- and your home’s value. To keep it procedures if you must reset switc
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MODEL 345MAV DIAGNOSTIC CHART (See Fig. 2.) FAULT CODE FAULT CODE DESCRIPTION CHECKLIST Check for dirty air filter. 13 or 33 Limit Switch Lockout Check for blocked return-air or supply-air grilles. Check to be sure manual shutoff valve in gas supply pipe is in the open position. (Follow start-up procedure if you open gas line.) Ignition Lockout or NOTE: Turn off the electrical supply and remove access doors before continuing with this 14 or 34 Ignition Proving Fault checklist. Check to b
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Cancels: OM05-27 OM05-29 © 1999 Bryant Heating & Cooling Systems, 7310 W. Morris St., Indpls., IN 46231 12 Printed in U.S.A. Catalog No. 5334-507 5-99
