Delta PG PLUS-25 warranty Multiple Vent Terminations, Locating the Combustion Air Inlet

Page 35

Venting and Combustion Air Installation

-Must maintain 4 feet of clearance below and horizontally from doors and windows. See dimension A Fig. 17.

If the venting application is a vertical direct or non-direct vent application:

-The vent must terminate at least 3 feet above the roof and at least 2 feet higher than any portion of the building within 10 feet.

Multiple Vent Terminations

For multiple unit installation venting horizon- tally, it is recommended to vent as direct vent using the Horizontal Wall Thimble Kit or Horizontal Concentric Kit. The terminations of these installations must maintain the same horizontal centerline and be spaced a minimum 18 inches from center to center.

For multiple unit installation venting vertically, it is recommended to vent as direct vent using Triangle Tube Vertical Concentric Vent Kit. The concentric vent / combustion air termina- tions must maintain a minimum 18 inch spac- ing from vent centerline to vent centerline.

Locating the Combustion Air Inlet

When ducting outside combustion air directly to the appliance the installer must use the fol- lowing guidelines:

1.The total equivalent length of the air inlet duct should not exceed 100 feet as given in Table 2, page 33.

2.The installer must consider the following when determining the location of the com- bustion air inlet:

-The air inlet must terminate at least 12 inches above grade or projected snow line.

-The combustion air inlet must be locat- ed a minimum 12 inches from the vent termination. This does not apply to Horizontal Concentric Direct Venting

applications using the Horizontal Wall Thimble kit . See Fig. 23 page 35

-The combustion air inlet should not be located above the vent termination.

-The combustion air inlet must be locat- ed in the same pressure zone as the vent termination.

Venting Option - Non Direct Vent / Vertical

In this vent application the PERFORMANCE PLUS is vented vertically through the roof or an unused chimney using only approved 3 inch stainless steel vent material and using room air for combustion.

The installer should consider the following when choosing this vent option:

a.The vent system must contain a con- densate trap located no higher than 2 feet above the unit. As shown in Fig. 19 page 34.

b.The vent system must pitch back to the unit 1/4 inch per foot or as specified by the vent manufacturer.

c.Clearance to combustibles must be maintained per the vent manufacturer’s requirements. Refer to the vent manu- facturer’s installation instructions for additional details.

d.At a minimum, a 3-inch elbow should be placed on the combustion air inlet of the unit. This will prevent an acciden- tal blockage should anything be placed on top of the unit.

NOTICE

When using an unused chimney as a means of a raceway for the 3 inch vent, the surrounding space cannot be used to draw combustion air.

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Contents PG PLUS-25/30/35/40 Gas Fired Combination Heaters For Your SafetyTable of Contents Section V Primary Piping Section VI Vent / Combustion AIR InstallationSection X START-UP Preparation Section Viii Internal WiringSection IX External Wiring Section VII GAS PipingSection XIV Installation Record Section XI START-UP ProceduresSection XII Temperature Limits Section Xiii CHECK-OUT ProceduresProduct Specifications Section Xvii Replacement PartsProduct & Safety Information To Protect Against Excessive Temperature and Pressure Homeowner What to do if YOU Smell GASDo not try to light any appliance Operating Restrictions Determining Product Location Pre-Installation Items Section I Pre-Installation ItemsBoiler Replacement Code ComplianceResidential Garage Installations Pre-Installation ItemsVenting Combustion Air and Venting Section II Combustion AirAir Openings Methods of Accessing Combustion Air Into a SpaceCombustion Air and Venting Combustion Air RequirementsEquipment Located in Confined Spaces One Permanent Air Inlet Outdoor Combustion AirVent System Combination of Indoor and Outdoor Combustion AirRemoval of an Existing Boiler f rom a Common Vent System Hydrostatic Pressure Test Hydrostatic Test ProceduresUnit Preparation Section III Unit Preparation Handling InstructionsCompletion of Hydrostatic Test and Draining Unit PreparationDomestic Piping Section IV Domestic Piping Domestic Piping Mixing Valve Assembly Multiple Units InstallationTR/SMART Series Application Domestic Piping DiagramsPerformance Plus With Recirculation Performance Plus with Storage Tank Primary Piping Section V Primary Piping Sizing Primary Piping Primary PipingCloset Zero Clearance Applications System Piping Zone CirculatorsPersonal injury, death or substantial property damage System Piping Radiant Heating with Mixing ValvePrimary Piping Near Appliance Piping Primary piping Zoning with Circulators Primary Piping Low Temperature Radiant System Primary Piping General Requirements Venting and Combustion Air Installation Section VI VentingCategory IV Vent Termination Clearances Venting and Combustion Air InstallationVenting Option Non Direct Vent / Vertical Multiple Vent TerminationsLocating the Combustion Air Inlet Venting Option Non-Direct Vent / Horizontal Venting Option Direct Vent / VerticalHorizontal Wall Thimble Kit Venting Option Direct Vent / HorizontalDetermining Piping Lengths Excessive Horizontal Vent RunsVent Appliance Adapters Allowable Equivalent Length Combined Vent and Combustion Air Standard Horizontal Venting Installation Location of Air Inlet Termination Venting and Combustion Air Installation Recommended Gas Supply Piping Section VII Gas PipingNatural Gas Supply Pressure Requirements Natural GASPipe Sizing Natural Gas Propane Gas Supply Pressure Requirements Propane GASPipe Sizing Propane Gas Wiring must be N.E.C Class Internal Wiring Section Viii Internal WiringFactory Wiring Schematic Internal WiringFactory Internal Wiring Line Voltage Connections External Wiring Section IX External WiringInstallation Compliance Outdoor Temperature LimitMultiple Zone Field Wiring Using Zone Valves External WiringField wiring with zone circulators Typical Zone Relay Panel Wiring Performance Plus Section X Start Up PreparationFilling the Outer Primary Tank and System Check Low Water Cut-Off Device Check Thermostat Circuit Verify Correct Pressure SwitchAir Shutter Settings If Performance Plus Does Not Start Correctly Start-Up ProceduresFinal Checks Before Start-up Performance Plus Start-upOperating Instructions For Your Safety Read Before LightingFollowing instructions must be followed exactly, a fire or Or loss of lifeNatural Gas Propane Recommended Secondary Thermostat Setting Temperature Limits Section XII Temperature LimitsTemperature Limits Section XIII- Check-Out Procedures Section XIV Installation Record General Section XV Maintenance ScheduleService Technician Owner MaintenanceInspect the Burner Area Section XVI Maintenance ProceduresCheck the Surrounding Area Check Expansion Tank Check Combustion/ Ventilation Air OpeningsInspect Vent System and Combustion Air Piping Check Domestic SystemCheck Thermostat Limit Settings Check Temperature / Pressure Relief ValveCheck Ignition Wiring and Ground Wiring Check Control WiringReview With Owner Check Burner Flame Flame SignalCheck Combustion Levels Section Xvii Replacement Parts Jacket Components Control Panel Components Electrical Panel Components Burner Components Specifications Graph 1 Performance Plus Pressure Loss Primary Side Maxi-flo Pool and Spa Heat Exchangers TTP Brazed Plate Heat Exchangers
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