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Bryant 345MAV instruction manual ÐShort Vent 5 to 8 Ft System, Ð27Ð

Models: 345MAV

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Fig. 32ÐShort Vent (5 to 8 Ft) System

TABLE 4ÐMAXIMUM ALLOWABLE VENT PIPE LENGTH (FT) Continued

ALTITUDE (FT)	UNIT SIZE	VENT PIPE			NUMBER OF 90° ELBOWS
ALTITUDE (FT)	UNIT SIZE	DIAMETER (IN.)	1	2		3	4		5	6
		DIAMETER (IN.)	1	2		3	4		5	6

	024040	1-1/2	42	37		32	27		25	20
	036040	2	57	55		53	51		49	47

	024060
	036060	2	45	40		38	33		31	29
	048060
9001 to 10,000²	036080	2	30	25		14	9		7	NA
	048080
	048080	2-1/2	57	55		53	51		49	47
	060080	2-1/2	57	55		53	51		49	47

	048100	2-1/2	21	13		5	NA		NA	NA
	060100	3	54	49		44	39		34	29
	060120	3*	39	37		35	33		31	29

* Wide radius elbow.

²Vent sizing for Canadian installations over 4500 ft (1370 m) above sea level are subject to acceptance by the local authorities having jurisdiction. NAÐNot Allowed; pressure switch will not make. NOTES:

1. Do not use pipe size greater than those specified in table or incomplete combustion, flame disturbance, or flame sense lockout may occur.

2. Assume two 45° elbows equal one 90° elbow. Long radius elbows are desirable and may be required in some cases.

3. Elbows and pipe sections within the furnace casing and at the vent termination should not be included in vent length or elbow count.

4. The minimum pipe length is 5 ft for all applications.

12″ MIN

12″ MIN

VENT PIPE				VENT PIPE
VENT PIPE

HORIZONTAL TO ROOF

HORIZONTAL TO SIDEWALL

	VENT PIPE
	12″ MIN
	12″ MIN
	VENT PIPE
VERTICAL TO ROOF	VERTICAL TO SIDEWALL

NOTE: A 12-In. minimum offset pipe section is recommended with short (5 to 8 ft) vent systems. This recommendation is to reduce excessive condensate droplets from exiting the vent pipe.

A96189

Fig. 32ÐShort Vent (5 to 8 Ft) System

Ð27Ð

Image 27

Bryant 345MAV instruction manual ÐShort Vent 5 to 8 Ft System, Ð27Ð

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