Delta PG PLUS-25 warranty Performance Plus With Recirculation

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Domestic Piping

Fig. 7: PERFORMANCE PLUS With Recirculation

Note: All shut off valves shown in this figure must be closed when siphon draining the PERFORMANCE PLUS

Fig. 8: Multiple Units Installation With Recirculation

1.	Mixing valve with check valve	6.	Thermal expansion tank
2.	Flow check valve	7.	Circulator (controlled by aquastat)
3.	Shut off valve	8.	Domestic drain valve
4.	Backflow preventer or pressure reducing valve*	9.	Vacuum breaker*

* Optional devices may be required by local Codes

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Contents For Your Safety PG PLUS-25/30/35/40 Gas Fired Combination HeatersTable of Contents Section VI Vent / Combustion AIR Installation Section V Primary PipingSection Viii Internal Wiring Section IX External WiringSection VII GAS Piping Section X START-UP PreparationSection XI START-UP Procedures Section XII Temperature LimitsSection Xiii CHECK-OUT Procedures Section XIV Installation RecordSection Xvii Replacement Parts Product SpecificationsProduct & Safety Information To Protect Against Excessive Temperature and Pressure What to do if YOU Smell GAS Do not try to light any applianceHomeowner Operating Restrictions Pre-Installation Items Section I Pre-Installation Items Boiler ReplacementCode Compliance Determining Product LocationPre-Installation Items Residential Garage InstallationsCombustion Air and Venting Section II Combustion Air VentingMethods of Accessing Combustion Air Into a Space Combustion Air and VentingCombustion Air Requirements Air OpeningsOutdoor Combustion Air Equipment Located in Confined Spaces One Permanent Air InletCombination of Indoor and Outdoor Combustion Air Vent SystemRemoval of an Existing Boiler f rom a Common Vent System Hydrostatic Test Procedures Unit Preparation Section III Unit PreparationHandling Instructions Hydrostatic Pressure TestUnit Preparation Completion of Hydrostatic Test and DrainingDomestic Piping Section IV Domestic Piping Domestic Piping Multiple Units Installation Mixing Valve AssemblyDomestic Piping Diagrams TR/SMART Series ApplicationPerformance Plus With Recirculation Performance Plus with Storage Tank Primary Piping Section V Primary Piping Primary Piping Closet Zero Clearance ApplicationsSystem Piping Zone Circulators Sizing Primary PipingSystem Piping Radiant Heating with Mixing Valve Personal injury, death or substantial property damagePrimary Piping Near Appliance Piping Primary piping Zoning with Circulators Primary Piping Low Temperature Radiant System Primary Piping Venting and Combustion Air Installation Section VI Venting General RequirementsVenting and Combustion Air Installation Category IV Vent Termination ClearancesMultiple Vent Terminations Locating the Combustion Air InletVenting Option Non Direct Vent / Vertical Venting Option Direct Vent / Vertical Venting Option Non-Direct Vent / HorizontalVenting Option Direct Vent / Horizontal Horizontal Wall Thimble KitExcessive Horizontal Vent Runs Vent Appliance AdaptersDetermining Piping Lengths Allowable Equivalent Length Combined Vent and Combustion Air Standard Horizontal Venting Installation Location of Air Inlet Termination Venting and Combustion Air Installation Section VII Gas Piping Recommended Gas Supply PipingNatural GAS Pipe Sizing Natural GasNatural Gas Supply Pressure Requirements Propane GAS Pipe Sizing Propane GasPropane Gas Supply Pressure Requirements Internal Wiring Section Viii Internal Wiring Wiring must be N.E.C ClassInternal Wiring Factory Wiring SchematicFactory Internal Wiring External Wiring Section IX External Wiring Installation ComplianceOutdoor Temperature Limit Line Voltage ConnectionsExternal Wiring Multiple Zone Field Wiring Using Zone ValvesField wiring with zone circulators Typical Zone Relay Panel Wiring Section X Start Up Preparation Performance PlusFilling the Outer Primary Tank and System Check Low Water Cut-Off Device Verify Correct Pressure Switch Air Shutter SettingsCheck Thermostat Circuit Start-Up Procedures Final Checks Before Start-upPerformance Plus Start-up If Performance Plus Does Not Start CorrectlyFor Your Safety Read Before Lighting Following instructions must be followed exactly, a fire orOr loss of life Operating InstructionsNatural Gas Propane Temperature Limits Section XII Temperature Limits Recommended Secondary Thermostat SettingTemperature Limits Section XIII- Check-Out Procedures Section XIV Installation Record Section XV Maintenance Schedule Service TechnicianOwner Maintenance GeneralSection XVI Maintenance Procedures Check the Surrounding AreaInspect the Burner Area Check Combustion/ Ventilation Air Openings Inspect Vent System and Combustion Air PipingCheck Domestic System Check Expansion TankCheck Temperature / Pressure Relief Valve Check Ignition Wiring and Ground WiringCheck Control Wiring Check Thermostat Limit SettingsCheck Burner Flame Flame Signal Check Combustion LevelsReview With Owner Section Xvii Replacement Parts Jacket Components Control Panel Components Electrical Panel Components Burner Components Specifications Graph 1 Performance Plus Pressure Loss Primary Side TTP Brazed Plate Heat Exchangers Maxi-flo Pool and Spa Heat Exchangers