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Bryant 345MAV ÐLeveling Legs, Ii.Installation On A Concrete Slab, Opening Dimensions In

Models: 345MAV

1 40

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Page 15

Fig. 14ÐLeveling Legs

5⁄16″

5⁄16″

1 3⁄4″

1 3⁄4″

5⁄16″

5⁄16″

1 3⁄4″ 1 3⁄4″

A89014

Fig. 14ÐLeveling Legs

3.Install another nut on other side of furnace base. (Install flat washer if desired.)

4.Adjust outside nut to provide desired height, and tighten inside nut to secure arrangement.

NOTE: Bottom closure must be used when leveling legs are used. See Bottom Closure Panel section.

II.INSTALLATION ON A CONCRETE SLAB

1.Construct hole in floor per dimensions in Fig. 15.

2.Place plenum and furnace as shown in Fig. 16.

III.INSTALLATION ON A COMBUSTIBLE FLOOR (DOWNFLOW APPLICATIONS)

1.Cut and frame hole in floor per dimensions in Installation Instructions packaged with downflow subbase kit.

NOTE: Remove furnace perforated, discharge duct flanges when they interfere with mating flanges on coil on downflow subbase. To remove furnace perforated, discharge duct flange, use wide duct pliers or duct flange tool to bend flange back-and-forth until it breaks off. Be careful of sharp edges. (See Fig. 17.)

WARNING: Do not bend duct flanges inward as shown in Fig. 17. This will affect airflow across heat exchangers and may cause limited cycling or premature heat ex- changer failure. Remove duct flange completely or bend it inward a minimum of 210° as shown in Fig. 17.

2.When complete, downflow subbase, plenum, and furnace (or coil casing when used) should be installed as shown in Fig. 18.

A

B

HOLE IN

FLOOR

				A73382
OPENING DIMENSIONS (IN.)

FURNACE	A	B
CASING WIDTH	A	Heat Only		Heat/Cool*
CASING WIDTH		Heat Only		Heat/Cool*

17-1/2	16-7/16	19-5/8		19-7/16
21	19-7/8	19-5/8		19-7/16
24-1/2	23-7/16	19-5/8		19-7/16

*These dimensions apply when a model CD or CK Evaporator Coil casing is to be installed.

Fig. 15ÐFloor Opening in Concrete Slab

FURNACE

PLENUM

A73383

Fig. 16ÐFurnace on a Concrete Slab

(Non-Garage Installation)

Ð15Ð

Image 15

Bryant 345MAV ÐLeveling Legs, Ii.Installation On A Concrete Slab, Opening Dimensions In, ÐFloor Opening in Concrete Slab

Contents

345MAV Fig. 1ÐMultipoise Orientationsinstallation, start-up and operating instructions→Fig. 2ÐDimensional Drawing DIMENSIONS ININSTALLATION SAFETY CONSIDERATIONSELECTROSTATIC DISCHARGE ESD PRECAUTIONS →Fig. 3ÐClearances to CombustiblesINTRODUCTION APPLICATIONS I.GENERALII.UPFLOW APPLICATIONS Fig. 4ÐCondensate Trap F. Pressure Switch Tubing Fig. 5ÐFactory-ShippedUpflow Tube ConfigurationShown With Blower Access Panel Removed Fig. 6ÐAlternate Upflow Tube Configuration andRight-HandTrap Installation Fig. 7ÐDownflow Tube ConfigurationLeft-HandTrap Installation Fig. 8ÐDownflow Tube ConfigurationA.Condensate Trap Location D.Pressure Switch TubingC.Condensate Trap Field Drain Attachment E. Condensate Trap Freeze ProtectionD.Pressure Switch Tubing Fig. 9ÐHorizontal Left Tube ConfigurationE.Condensate Trap Freeze Protection F.Construct a Working PlatformC.Condensate Trap Field Drain Attachment D. Pressure Switch TubingFig. 10ÐAttic Location and Working Platform B.Condensate Trap TubingÐ11Ð II.FURNACE LOCATION RELATIVE TO COOLING EQUIPMENT III.CONFINED SPACE III.HAZARDOUS LOCATIONSAIR FOR COMBUSTION AND VENTILATION I.GENERAL II.UNCONFINED SPACEFig. 13ÐConfined Space: Air for Combustion and INSTALLATION I.LEVELING LEGS IF DESIREDFig. 12ÐConfined Space: Air for Combustion and Ventilation from an Unconfined SpaceFig. 14ÐLeveling Legs II.INSTALLATION ON A CONCRETE SLABOPENING DIMENSIONS IN Non-GarageInstallationB.Ductwork acoustical treatment IV. INSTALLATION IN HORIZONTAL APPLICATIONSV.AIR DUCTS A.General Requirements Fig. 17ÐDuct FlangesVII. BOTTOM CLOSURE PANEL D.Return Air ConnectionsVI. FILTER ARRANGEMENT TABLE 1ÐFILTER INFORMATIONFig. 21ÐBottom Filter Arrangement Fig. 20ÐFilter Installed for Side InletFig. 22ÐRemoving Bottom Closure Panel VIII. GAS PIPINGTABLE 2ÐMAXIMUM CAPACITY OF PIPE CU FT PER HR Fig. 23ÐTypical Gas Pipe ArrangementELECTRICAL CONNECTIONS Fig. 25ÐRelocating J-Box I.115-VWIRINGTABLE 3ÐELECTRICAL DATA J-BOXRELOCATIONÐ21Ð Fig. 26ÐWiring DiagramFig. 27ÐControl Center II.24-VWIRINGIII.ACCESSORIES VENTINGII.COMBUSTION-AIRAND VENT PIPING A.General B. Combustion Air PipeFig. 28ÐCombustion-Airand Vent Pipe Connections Fig. 30ÐIntake Housing Plug Fitting Drain COMBUSTION-AIRINLET PIPE ASSEMBLY INFig. 29ÐCombustion-AirInlet Pipe Assembly Elbow ConfigurationÐ25Ð TABLE 4ÐMAXIMUM ALLOWABLE VENT PIPE LENGTH FTÐ26Ð Ð27Ð Fig. 32ÐShort Vent 5 to 8 Ft SystemWINTER DESIGN TEMPERATURE AMBIENT CONDENSATE DRAIN I.GENERAL D.Extended Exposed Sidewall PipesIII.VENT TERMINATION IV. MULTIVENTINGÐ30Ð Fig. 33ÐRoof Termination PreferredFig. 35ÐSidewall Termination with Straight Pipe Fig. 36ÐExample of Field Drain AttachmentIV. HEAT PUMP MODE I.HEATING MODEII.COOLING MODE III.CONTINUOUS BLOWER MODESTART-UPPROCEDURES I.GENERAL V.COMPONENT TEST A.Component Test SequenceII.PRIME CONDENSATE TRAP WITH WATER → Fig. 39ÐFilling Condensate Trap →Fig. 38ÐInducer Housing Drain TubeIV. ADJUSTMENTS A.Set Gas Input Rate III.PURGE GAS LINESÐ34Ð Continued Ð36Ð ContinuedTABLE 8ÐALTITUDE DERATE MULTIPLIER FOR U.S.A Fig. 40ÐRedundant Automatic Gas ValveUNITED STATES Fig. 41ÐBurner FlameTABLE 10±SPEED SELECTOR B.Set Temperature RiseC.Blower Off Delay Heat Mode TABLE 9ÐGAS RATE CU FT/HRI.CHECK PRIMARY LIMIT CONTROL CHECK SAFETY CONTROLSII.CHECK PRESSURE SWITCH CHECKLISTÐ40Ð CHECKLISTÐINSTALLATION