PVI Industries manual PV500-45U 06/12

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19.When the blower motor starts, the flame control will check for a positive air flow. If the air switch or blocked filter switch (if equipped) is not made the blower will stay on for a period of time then lockout. To adjust the air- proving switch, turn the adjustment screw counter-clockwise until the air proving light comes on, then turn the screw one turn counter-clockwise. The blocked filter switch (if equipped) should only be adjusted when the filter is new. This switch should be turned clockwise until switch makes and then two additional turns. If the gas valves open and close intermittently during normal operation, adjust pressure switches to increase the operational threshold until this condition ceases. This procedure should be followed with every burner.

20.After the pre-purge, the flame control energizes the HSI for the heat up period, approximately 30 seconds. At the end of that period the gas valve is opened for approximately 4 seconds. After the burner has lit and the primary safety control senses a flame, the burner will remain on until the call for heat is satisfied or operation is interrupted by a safety device.

21.If the burner fails to light, the flame control will lockout. When this happens press the reset button on the front of the control to recycle burner and check for improper combustion or week flame signal as a possible cause.

22.Once the main burner flame is established the firing rate will be controlled by the TempTrac control. Refer to TempTrac manual PV500-41.

Burner Combustion Adjustment

Burner combustion should only be adjusted using a combustion analyzer. Do not attempt to adjust burner by sound or sight. With the burner firing, insert the combustion analyzer probe in the flue vent approximately two feet from the appliance. See Gas Train Illustration below for details.

With the burner firing and adjusted to low fire, adjust the regulator screw clockwise to increase gas flow or counter clockwise to decrease flow. The desired CO2 in the combustion products should be between 8.0 and 9.0% for natural gas, 9.5% to 10.5% for LP gas. Do not attempt to adjust combustion based on manifold pressure alone. Manifold pressure should only be used as a reference point.

a.Once the desired combustion is achieved at low fire, raise the burner firing rate to high fire. Adjust the valve orifice clockwise to reduce the flow of gas and counter-clockwise to increase the flow of gas in order to maintain the desired CO2 in the combustion products between 8.0 and 9.0% for natural gas, 9.5% to 10.5% for LP gas.

b.When high fire combustion has been reached and combustion is within the proper range, return to low fire to confirm settings again.

c.CAUTION: If at any point of the modulation range, carbon monoxide is in excess of 300ppm, contact PVI Industries customer service for assistance.

23.Enable or reconnect any BMS/BAS control interface removed prior to the setup and adjustment of each water heater.

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PV500-45U 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 ConnectionsPV500-45U 06/12 PV500-45U 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 PV500-45U 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 PV500-45U 06/12 Recommended Maintenance Schedule PV500-45U 06/12 PV500-45U 06/12
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