PVI Industries PV500-45C manual Duct Fitting Equivalent Length Duct Pipe

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8.2 Maximum Allowed Remote Combustion Air Inlet Length (Equivalent Length)

A vertical or horizontal remote air inlet system can be connected to this appliance without modification. The maximum length of field supplied single wall pipe, such as galvanized ventilation pipe, is shown in the chart below titled Maximum Air Inlet Duct Equivalent Length. Use metal tape or RTV sealant to seal each pipe joint.

Maximum Air Inlet Duct Equivalent Length

Duct Size

6” Duct

7” Duct

8” Duct

9” Duct

Max Equivalent Length

100 feet

130 feet

250 feet

450 feet

To determine the maximum straight length of duct allowed, use the Duct Fitting Equivalent Length chart below to find the total equivalent length for all duct fittings in your combustion air system. Then subtract this number of feet from the total equivalent length allowed in Maximum Air Inlet Duct Equivalent Length chart above. The sum of this calculation is the maximum length of straight duct allowed. If a longer length is required, repeat the calculation using a larger duct size. No additional deduction is required for the addition of the duct system terminal.

Duct Fitting Equivalent Length

 

Duct Pipe:

6” Duct

7” Duct

8” Duct

9” Duct

90º

Elbow

8 feet

9 feet

10 feet

11 feet

90º

Long Radius Elbow

5 feet

5 feet

5 feet

6 feet

45º

Elbow

5 feet

5 feet

5 feet

5 feet

The following remote air duct information is provided for use in design calculations, if needed.

Remote Air Duct Specifications

Input MBtu

Required Air (SCFM)

399

87

500

108

750

163

900

195

1000

217

8.3Remote Combustion Air Cap

A UL Listed air intake vent termination cap MUST be attached to the remote combustion air vent termination to adequately protect the combustion air inlet from wind and weather. A UL Listed air intake termination cap is available from PVI Industries and may have shipped with the water heater as a purchased option.

8.4Vertical or Horizontal Remote Air Duct Termination

Air inlet and exhaust vents should terminate in the same wind pressure area whenever possible.

Air inlet must be located no less than 3 feet (0.91m) below the exhaust terminal if they are within 10 feet (3.05 m) of each other.

If terminating through the roof, the air inlet must terminate at least 12 inches (0.3 m) above roof level and at least 12 inches (0.3 m) above snow levels.

If terminating through a sidewall, the air inlet must terminate at least 12 inches (0.3 m) above grade and/or at least 12 inches (0.3 m) above normal snow levels.

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PV500-45C 06/12

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Contents Installation & Maintenance Manual Table of Contents Temptrac Electronic Controller Panel Operating and Safety ControlsTroubleshooting Guide Replacement Parts Remote Connections Terminal StripSafety Considerations Product Safety InformationBelow scalding temperatures Standard Features and Equipment Series Series Series Codes Water Heater InstallationChecking Equipment Before You Install Electrical RequirementsGeneral Piping Guidelines Service ClearancesClearances To Combustible Surfaces Inlet and Outlet ConnectionsPV500-45C 06/12 PV500-45C 06/12 Optional Condensate Neutralization System GAS Supply and Piping Inlet Pressure NAT. GASConvert Fittings to Equivalent Straight Pipe Nominal Iron Length of Pipe in Straight Feet Single Unit Installation Suggested Pipe SizeMultiple Unit Installations GAS Piping Size Chart InchesCombustion and Ventilation AIR Duct Fitting Equivalent Length Duct Pipe Vertical or Horizontal Remote Air Duct TerminationVenting Venting the TriconMaximum Category IV Vent Length Equivalent Length Vent Fitting Equivalent Length Vent Pipe Combining Category IV VentsOperating and Safety Controls Temperature and Pressure Relief Valve sHigh Water Temperature Limit Control Cathodic ProtectionElectronic Low Water Cut-Off Optional Down Temptrac Electronic Controller PanelSET ClockTo View The Setpoint To Change The SetpointTo Change Other Parameters Recommended Action LED Display Alarm MessagesAlarm Cause Results of Alarm Condition Message Remote Connections Terminal StripSequence of Operation Incoming 120VACLoss of Flame Signal LED Indication Fault ModeInitial Startup Turn-on main gas shutoff valve PV500-45C 06/12 Gas Train Illustration for Models 40 through Gas Train Illustration for Models 65 throughTroubleshooting Guide Problem Probable Cause Corrective ActionReplacement Parts Replacement PartsControl Panel Contact factory for more information Burner Assembly Optional components may or may not be shown Contact factory for more information Item No Qty PVI Part No DescriptionPeriodic Maintenance PV500-45C 06/12 Recommended Maintenance Schedule PV500-45C 06/12 PV500-45C 06/12

PV500-45C specifications

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