Carrier 58HDV installation instructions Combustion Air and Vent Piping Insulation Guidelines

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Applicable ASTM Standards for Vent

Materials

 

 

 

 

 

 

 

 

 

 

Materi-

 

Sch. 40

SDR

Cell

 

 

 

Solv.

 

Core

Fittings

Primer

 

als

 

Pipe

Pipe

 

Cement

 

Pipe

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D2468

 

 

 

ABS

 

D1527

__

F628

&

----

 

D2235

 

 

 

 

 

D2661

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D2466

 

 

 

PVC

 

D1785

D2241

F891

&

F656

 

D2564

 

 

 

 

 

D2665

 

 

 

 

 

 

 

 

 

 

 

 

CPVC

 

F441

F442

----

F438

----

 

F493

 

 

 

 

 

 

 

 

 

ABS to

 

----

----

----

----

----

 

D3138

PVC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(2.) Only use solvent cements that are marked for use with the specific venting material.

(3.) ABS to PVC transition joints REQUIRE a special

solvent cement that meets the requirements of ASTM D3138.

(4.) Refer to ASTM D2855 for general procedure to use for cementing plastic pipe and fittings.

NOTE: In order to create a seal that allows future removal of pipe, RTV sealant MUST be used on the inlet pipe where it joins to the furnace.

NOTE: All vent piping MUST be installed in compliance with local codes or ordinances, these instructions, good trade practices, and codes of country having jurisdiction.

1.Determine the best routing and termination for the vent pipe and air inlet pipe by referring to all of the instructions and guidelines in this Section.

2.Determine the size required for the vent pipe and air inlet pipe.

3.Loosely assemble all venting parts without adhesive (pipe joint cement) for correct fit before final assembly.

4.Furnace shall be installed so as to prevent the accumulation of condensate.

5.Use of vertical piping is preferred because there will be some moisture in the flue gases that may condense as it leaves the vent pipe (See Instructions for Horizontal Vents).

6.The vertical vent pipe MUST be supported so that no weight is allowed to rest on the combustion blower.

7.Exhaust vent piping or air inlet piping diameter MUST NOT be reduced.

8.All exhaust vent piping from the furnace to termination

MUST slope upwards. A minimum of 1/4(6.4mm) per foot (304.8mm) of run is required to properly return condensate to the furnace drain system.

9.Use DWV type long radius elbows whenever possible, as they provide for the minimum slope on horizontal runs and they provide less resistance in the vent system. If DWV elbows cannot be used, use two, 45° elbows when possible. On horizontal runs the elbows can be slightly misaligned to provide the correct slope.

10.All horizontal pipe runs MUST be supported at least every five feet (1.5 M) with galvanized strap or other rust resistant material. NO sags or dips are permitted.

11.All vertical pipe runs MUST be supported every six feet (4.8 M) where accessible.

12.The maximum pipe length is 40(12.2m) total in the inlet or outlet side of the system. Up to five, 90° elbows can be used on the inlet or the outlet. With the Concentric Vent Termination Kits (KGAVT0701CVT or KGAVT0801CVT), the maximum pipe length is 35(10.7m) with four 90° elbows. If more elbows are required, reduce the length of

both the inlet and exhaust pipes 5(1.5m) for each additional elbow used. (See Table 3 or Table 4).

13.The minimum vent length is 5(1.5m) of PVC.

14.The piping can be run in the same chase or adjacent to supply or vent pipe for water supply or waste plumbing. It can also be run in the same chase with a vent from another 90+ furnace.

NOTE: In NO case can the piping be run in a chase where temperatures can exceed 140° F (60° C). or where radiated heat from adjacent surfaces would exceed 140° F(60° C).

15.The vent outlet MUST be installed to terminate in the same atmospheric pressure zone as the combustion air inlet.

16.The vent system can be installed in an existing unused chimney provided that:

SBoth the exhaust vent and air intake run the length of the chimney.

SNo other gas fired appliance or fireplace (solid fuel) is vented into the chimney.

SThe top of the chimney MUST be sealed flush or crowned up to seal against rain or melting snow so ONLY the piping protrudes.

SThe termination clearances shown in Fig. 8 are maintained.

17.Furnace applications with vertical vents requiring vent diameter increaser fittings must have increaser fittings installed in vertical portion of the vent. Condensate will be trapped in the vent if the vent diameter is increased prior to having an elbow turned upward. This could cause nuisance tripping of the pressure switch.

Combustion Air and Vent Piping Insulation Guidelines

NOTE: Use closed cell, neoprene insulation or equivalent. If Fiberglass or equivalent insulation is used it must have a vapor barrier. Use R values of 7 up to 10(3.1m), R-11 if exposure exceeds 10(3.1m). If Fiberglass insulation is used, exterior to the structure, the pipe MUST be boxed in and sealed against moisture.

1.When the vent or combustion air pipe height above the roof exceeds 30(76.2mm), or if an exterior vertical riser is used on a horizontal vent to get above snow levels, the exterior portion MUST be insulated.

2.When combustion air inlet piping is installed above a suspended ceiling, the pipe MUST be insulated with moisture resistant insulation such as Armaflex or other equivalent type of insulation.

3.Insulate combustion air inlet piping when run in warm, humid spaces.

Sizing Combustion Air and Vent Pipe

Consult Table 3 or Table 4 to select the proper diameter exhaust and combustion air piping. Exhaust and combustion air piping is sized for each furnace Btuh size based on total lineal vent length (on inlet or outlet side), and number of 90° elbows required.

1.Double Pipe Installation-If installing as a direct-vent appliance, consult Table 4 to select the proper diameter exhaust and combustion air piping. Exhaust and combustion air piping is sized for each furnace Btuh size based on total lineal vent length (on inlet or outlet side), and number of 90° elbows required.

2.Single Pipe Installation-If installing as a non-direct vent appliance, (single outlet pipe and no inlet pipe) refer to Table 3. The table shows the maximum number of elbows allowed with any given pipe diameter and length of run.

3.Use of Elbows-Two 45° elbows can be substituted for one 90° elbow. The elbow or elbows used for vent termination outside the structure ARE counted, including elbows needed to bring termination above expected snow levels.

58HDV

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Contents Installation Instructions Required Notice for Massachusetts Installations CUT Hazard Furnace Reliability HazardFIRE, EXPLOSION, and Asphyxiation Hazard Winter Shutdown Frozen Water Pipe HazardWater Damage to Property Hazard Installation Requirements Installation PositionsLocation and Clearances Carbon Monoxide Poisoning HazardHorizontal Furnace Installation Furnace Installation ConsiderationsCondensate Trap and Drain Lines LevelingDimensions and Clearances Knock Outs Air Openings and Connecting DuctsOutdoor Combustion Air Method Requirements Confined Space InstallationIndoor Combustion Air Unconfined Space Venting and Combustion Air Check Ventilation AirMake the Following Check Dual Certified Direct or Non- Direct Vent For Two Pipe Installation Direct VentContaminated Combustion Air Sizing Combustion Air and Vent Pipe Combustion Air and Vent Piping Insulation GuidelinesSingle Piping only Vent Termination ClearancesDirect Vent Termination Clearance Other than Direct Vent Termination Clearance Frozen and Burst Water Pipe Hazard Condensate Drain TrapOnly Upflow Installations Top Vent See FigSide View Upflow Installations Vent through Left-Side See FigPVC All Models Vent through Right-Side See FigExhaust Downflow Left-Side Vent and Trap See FigDownflow Right-Side Vent and Trap Downflow Right-Side Vent and Trap See FigExhaust Horizontal Left through Top See FigInlet Horizontal Left-Side Vent See FigHorizontal Right through Top Horizontal Right through Top See FigExhaust Horizontal Right-Side Vent See FigCombustion Air Pipe Connection Direct Vent Connecting Vent and Combustion Air PipingVent Pipe Connection Joining Pipe and Fittings Connecting Vent Pipes and TerminationHorizontal Termination Vertical Termination Using Exterior RisersVent Termination Shielding Multi Vent Termination ClearancesConcentric Vent and Combustion-Air Vertical & Horizontal Termination Concentric Vent TerminationCarbon Monoxide POISONING, Fire and Explosion Hazard 40,000, 50,000, 60,000, & 75,000 Btuh Furnaces Gas Supply Requirements Gas Piping RequirementsFire and Explosion Hazard Fire HazardTypical Gas Piping for Upflow Electrical Operation HazardPropane Conversion High Altitude Air Pressure SwitchGeneral Derating Rules Additional Propane Connection RequirementsElectrical SHOCK, Fire or Explosion Hazard Changing Orifices for High AltitudeFinal Gas Piping Check Power Supply WiringJunction Box J- Box Relocation Thermostat HeatingOptional Equipment CoolingFurnace Control Fuse Tap Select Interface BoardConnections InstallationSizing InsulationFilters Filter Installation using Filter RackAddition Of Air Conditioning Subbase for Combustible Floor Combustible Floor InstallationStartup Manifold Gas Pressure AdjustmentsGas Supply Pressure Natural Gas Input Rating Check Temperature Rise CheckMain Burner Flame Check Continuous- Fan using G Blower AdjustmentsHard Wired Continuous Fan Operation Changing Blower SpeedOn = OFF = High Cooling Y1 & Y/Y2 or Y/Y2 Request Low Cooling Y1 RequestContinuous Circulating Fan G Request Heating Request with Gas Shut Off Furnace Control Board Diagnostic Codes See FigWiring Diagram Thermostat Wiring Guide No Connection SINGLE-STAGE Thermostat TWO-STAGE Catalog No 58HDV---01SI