Bryant 355M-40-4 ÐCOMBUSTION-AIR and Vent Pipe Termination Clearances, Location Clearance FT

Page 22

TABLE 5ÐCOMBUSTION-AIR AND VENT PIPE

TERMINATION CLEARANCES

LOCATION

CLEARANCE (FT)

U.S.A.

Canada

 

 

 

 

Above grade level or above antici-

1

1²

pated snow depth

 

 

Dryer vent

3

3

From plumbing vent stack

3

3

From any mechanical fresh air intake

1

6

For furnaces with an input capacity

 

 

less than 100,000 BtuhÐfrom any

 

 

non-mechanical air supply (windows

1

1

or doors which can be opened) or

 

 

combustion-air opening

 

 

For furnaces with an input capacity

 

 

greater than 100,000 BtuhÐfrom any

 

 

non-mechanical air supply (windows

1

3

or doors which can be opened) or

 

 

combustion-air opening

 

 

From service regulator vent, electric

4*

6³

and gas meters, and relief equipment

 

 

Above grade when adjacent to public

7

7

walkway

 

 

* Horizontal distance.

² 18 in. above roof surface in Canada.

³36 in. to electric meter in Canada only.

NOTES:

1. If installing 2 adjacent 355MAV Furnaces, refer to Multiventing and Vent Terminations section for proper vent configurations.

2. When locating combustion-air and vent terminations, consideration must be given to prevailing winds, location, and other conditions which may cause recirculation of the appliance's own flue products or the flue products of adjacent vents. Recirculation can cause poor combustion, inlet condensate problems, and accelerated corrosion of heat exchangers.

NOTE: Select 1 vent pipe connection and

NOTE: Select 1 vent pipe connection and

1 combustion-air pipe connection.

1 combustion-air pipe connection.

AIR

 

 

 

 

COMBUSTION- FLOW COMBUSTION-

 

 

 

AIR

AIR

VENT

 

 

VENT

 

 

 

VENT

 

 

 

 

 

VENT

 

 

 

 

 

COMBUSTION-

COMBUSTION-

 

 

AIR

AIR

AIR

 

 

 

 

 

 

 

FLOW

 

UPFLOW

 

DOWNFLOW

 

 

 

 

COMBUSTION-

COMBUSTION-

 

 

AIR

 

 

 

 

 

AIR

 

 

VENT

 

VENT

 

 

 

AIR

 

 

 

AIR

FLOW

 

 

 

FLOW

HORIZONTAL-LEFT DISCHARGE

HORIZONTAL-RIGHT DISCHARGE

A96187

Fig. 28ÐCombustion-Air and Vent Pipe Connections

NOT IN HORIZONTAL SECTION

FURNACE

PIPE DIAMETER

TRANSITION IN

VERTICAL SECTION

A93034

WARNING: Solvent cements are combustible. Keep away from heat, sparks, and open flame. Use only in well ventilated areas. Avoid breathing in vapor or allowing contact with skin or eyes. Failure to follow this warning could result in fire, property damage, personal injury, or death.

WARNING: All combustion-air and vent pipes must be airtight and watertight. Pipes must also terminate exactly as shown in Fig. 31, 32, 33, 34, or 35. Failure to follow this warning could result in property damage, personal

Fig. 27ÐCombustion-Air and Vent Pipe Diameter

Transition Location and Elbow Configuration

CAUTION: Combustion air must not be taken from inside structure because that air is frequently contami- nated by halogens, which include fluorides, chlorides, bromides, and iodides. These elements are found in aerosols, detergents, bleaches, cleaning solvents, salts, air fresheners, adhesives, paint, and other household prod- ucts. Locate combustion-air inlet as far as possible from swimming pool and swimming pool pump house.

Excessive exposure to contaminated combustion air will result in safety and performance related problems.

Ð22Ð

injury, or death.

NOTE: The minimum combustion-air and vent pipe length (each) for these furnaces is 5 ft. Short pipe lengths (5-8 ft) may discharge water droplets. These droplets may be undesirable, and a 12-in. minimum offset pipe section is recommended, as shown in Fig. 29, to reduce excessive droplets from exiting vent pipe outlet.

B.Combustion-Air and Vent Pipe Diameter

Determine combustion-air and vent pipe diameter.

1.Using Table 6, individually determine the combustion-air and vent pipe diameters. Pick the larger of these 2 pipe diameters and use this diameter for both combustion-air and vent pipes.

2.When installing vent systems of short pipe length, use the smallest allowable pipe diameter. Do not use pipe size greater than required or incomplete combustion, flame disturbance, or flame sense lockout may occur.

NOTE: Do not count elbows or pipe sections in terminations or within furnace. See shaded areas in Fig. 31, 32, 33, 34, and 35.

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Contents Ð1Ð ÐMultipoise OrientationsÐ2Ð DimensionsUnit Size Minimum Inches Clearance To Combustible Construction Safety ConsiderationsElectrostatic Discharge ESD Precautions → ÐClearances to CombustiblesII. Upflow Applications IntroductionApplications General Condensate Trap Location Factory-Shipped OrientationÐ5Ð Condensate Trap Location Alternate Upflow OrientationÐ6Ð Pressure Switch TubingCondensate Trap Field Drain Attachment Condensate Trap Tubing III. Downflow ApplicationsCondensate Trap Location Ð7ÐÐ8Ð IV. Horizontal Left SUPPLY-AIR Discharge ApplicationsHorizontal Right SUPPLY-AIR Discharge Applications Construct a Working PlatformÐ9Ð ÐAttic Location and Working Platform Condensate Trap Tubing ÐHorizontal Right Tube Configuration Location GeneralII. LOW-FIRE only Installation III. Furnace Location Relative to Cooling EquipmentII. Installation in Upflow or Downflow Applications Installation Leveling Legs if DesiredIV. Hazardous Locations Furnace Plenum Opening Floor Opening Casing Ðopening DimensionsWidth III. Installation in Horizontal Applications ÐDuct FlangesBottom Closure Panel IV. Filter ArrangementÐfilter Information → ÐBottom Filter ArrangementÐmaximum Capacity of Pipe WiringVI. GAS Piping Electrical Connections→ ÐHeating and Cooling Application Wiring Diagram II -V WiringÐWiring Diagram Ðelectrical Data III. AccessoriesAmps Size Ngpic Direct VentingRemoval of Existing Furnaces from Common Vent Systems II. COMBUSTION-AIR and Vent PipingLocation Clearance FT ÐCOMBUSTION-AIR and Vent Pipe Termination ClearancesCombustion-Air and Vent Pipe Diameter Or doors which can be opened or Combustion-air openingExample Combustion-Air and Vent Pipe Attachment3001 to Ðmaximum Allowable Pipe Length FT2001 to 4001 to 5000³7001 to 8000³ Ðmaximum Allowable Pipe Length FT6001 to 7000³ 8001 to 9000³Termination KIT Installation COMBUSTION-AIR Intake Housing Plug FittingIII. Concentric Vent and COMBUSTION-AIR ÐRoof Termination Preferred Concentric Vent/Air Termination Kit Extended Exposed Sidewall PipesTwo-Pipe Termination Kit 042040 042060 042080 060080 060100 060120II. Application IV. Multiventing and Vent TerminationsCondensate Drain General III. Condensate Drain ProtectionÐConcentric Vent and Combustion-Air Roof Sequence of Operation SELF-TEST ModeII. Heating Mode HSIVI. Heat Pump Mode IV. Emergency Heat ModeCooling Mode III. Heating Modeðtwo StageÐWiring Schematic for 2-Speed Cooling Applications VII. Continuous FAN ModeXI. Zone Mode IX. Bypass Humidifier ModeDehumidification Mode START-UP Procedures GeneralSetup Switches SW Ðair Conditioning A/C Airflow Setup Switch PositionÐcontinuous FAN CF Airflow Setup Switch Position III. Prime Condensate Trap with WaterÐsetup Switch Description Ðblower OFF Delay Setup Switch PositionSet Gas Input Rate AdjustmentsIV. Purge GAS Lines → ÐRedundant Automatic Gas ValveBTU/CU FT 875 1.5 Only4001 50008000 7001775 1.5 825Sume the Orifice SIZE. Always Check and Verify Ðaltitude Derate Multiplier for U.S.ACanada Altitude Derate Multiplier Factor for U.S.AÐgas Rate CU FT/HR Set Temperature RiseCheck Safety Controls Check Primary Limit Control Set Thermostat Heat AnticipatorII. Check Pressure Switches ChecklistLoad Calculation ChecklistðinstallationCHECKLISTÐSTART-UP Combustion and Vent Piping

355M-40-4, 355M-40-5 specifications

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