PVI Industries 150, 180 manual Sequence of Operation, Incoming 120VAC, Loss of Flame Signal

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13SEQUENCE OF OPERATION

1.Incoming 120VAC

a.Full time power to the Main Control Switch

b.Full time power to the Variable Frequency Drive

2.Power On - When the main control switch is turned on:

a.120v is applied to the step-down transformer (24v)

b.120v is applied to the L.W.C.O. terminal L1 (if used)

c.120v is applied to the Fenwal Flame Safeguard Control

d.24v is applied to the TempTrac operating temperature control terminal L1

3.Call For Heat - If the TempTrac operating control senses a call-for-heat condition:

a.The High Gas Pressure and Low Gas Pressure Switch (both optional) are energized and their safe condition is proved.

b.The thermostat contact on the Fenwal Flame Safeguard Control is energized.

c.The flame control will then verify the Airflow-Proving Switch is in the open position, which must exist before the blower is powered.

d.Energizing the blower should close the airflow proving switch. If the airflow-proving switch is not in the closed position, the flame control’s fan terminals F1-F2 will power the Variable Frequency Drive (VFD) blower system at low speed for pre-purge.

e.If the airflow-proving switch does not close following the blower being energized, the flame control will lockout.

4.Proof of Air Pressure Switch - The control will look for a signal from the airflow-proving switch, indicating that the blower is operating:

a.When the airflow generated by the blower is sufficient to cause the differential air switch to close, the 15 - second pre-purge delay will start.

b.During this period any flue products or combustible gases which may have settled in the water heater are evacuated.

5.Heat-Up- Following the pre-purge delay, the hot surface igniter will be energized:

a.The flame control will monitor the current applied to the hot surface igniter.

b.If the flame control determines the proving current meets the threshold, a dwell time delay starts to assure the hot surface igniter has sufficient time to reach ignition temperature.

6.Ignition - When dwell time is completed a 4-second Trial for Ignition (TFI) period is initiated:

a.The Delay-On (Low Fire Hold) Relay and the Gas Safety Valves are energized.

b.During TFI the flame safeguard control will monitor the flame using flame rectification through the hot surface igniter.

c.If the flame control senses the presence of flame before the end of the TFI period, the igniter will be de- energized and the flame control will continue to monitor the flame, through the igniter, until the operating thermostat ends the call for heat condition.

7.Loss of Flame Signal

a.If the igniter fails to sense flame at any time, the igniter and gas valve will be de-energized and the flame control will reset and begin the call-for-heat sequence again. This will occur 3 times (one time if CSD-1) before the flame control will lockout.

b.When the call for heat condition ends or flame failure occurs following the third TFI period (one time if CSD- 1), a 30-second post-purge period will begin. This period of blower operation will exhaust any remaining combustion products from the system.

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PV500-46U 06/12

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Contents Installation & Maintenance Manual Table of Contents Remote Connections Terminal Strip Operating and Safety ControlsTroubleshooting Guide Replacement Parts Temptrac Electronic Controller PanelProduct Safety Information Safety ConsiderationsBelow scalding temperatures Standard Features and Equipment Series Series Electrical Requirements Water Heater InstallationChecking Equipment Before You Install CodesInlet and Outlet Connections Service ClearancesClearances To Combustible Surfaces General Piping GuidelinesPV500-46U 06/12 PV500-46U 06/12 Optional Condensate Neutralization System Convert Fittings to Equivalent Straight Pipe Single Unit Installation Suggested Pipe SizeGAS Supply and Piping Inlet Pressure NAT. GASAppliance Isolation during Gas Supply Piping Pressure Test Multiple Unit Installations GAS Piping Size ChartNominal Iron Length of Pipe in Straight Feet Inches∙ All Air From Inside The Building Combustion and Ventilation AIREquipment Located In Confined Spaces ∙ All Air From OutdoorsVertical or Horizontal Remote Air Duct Termination Duct Fitting Equivalent Length Duct PipeMaximum Category IV Vent Length Equivalent Length Venting the Power VT Plus Sani modelsVenting the Power VT Plus VentingVent Fitting Equivalent Length Vent Pipe Combining Category IV Vents Vertical or Horizontal Vent TerminationTemperature and Pressure Relief Valves Operating and Safety ControlsHigh Water Temperature Limit Control Cathodic ProtectionElectronic Low Water Cut-Off Optional Clock Temptrac Electronic Controller PanelSET DownTo View The Setpoint To Change The SetpointTo Change Other Parameters LED Display Alarm Messages Alarm Cause Results of Alarm Condition MessageRecommended Action Remote Connections Terminal Strip Loss of Flame Signal Sequence of OperationIncoming 120VAC OFF LED Indication Fault ModeInitial Startup Turn-on main gas shutoff valve PV500-46U 06/12 Alternate Gas Train Illustration Gas Train IllustrationProblem Probable Cause Corrective Action Troubleshooting GuideReplacement Parts Replacement PartsControl Panel Contact factory for more information Burner Assembly Optional components may or may not be shown SUPPORT, GAS Train FB14 Pvif Burner Assembly ComponentsContact factory for more information Burner GAS Train ComponentsPeriodic Maintenance PV500-46U 06/12 Recommended Maintenance Schedule PV500-46U 06/12 PV500-46U 06/12

150, 180 specifications

PVI Industries has established itself as a prominent manufacturer in the water heating industry, particularly known for its range of commercial water heaters. Among their well-regarded products is the PVI Industries 150,180, a robust unit engineered to meet the demanding needs of various commercial applications.

The PVI Industries 150,180 is designed to deliver high-efficiency performance, catering primarily to large-scale operations such as hotels, hospitals, and other facilities that require a constant supply of hot water. The unit boasts impressive heating capacity, enabling it to serve multiple points of use simultaneously. With a focus on reliability and durability, the construction of the 150,180 incorporates high-quality materials that ensure longevity even in the most challenging environments.

One of the standout features of the PVI 150,180 is its advanced heating technology. The unit utilizes a state-of-the-art gas-fired burner system, which not only ensures rapid heating but also maximizes energy efficiency. This attention to energy performance is crucial for businesses aiming to reduce operational costs and minimize their environmental impact. Furthermore, the unit supports a range of fuel types, including natural gas and propane, providing flexibility for different regional needs and preferences.

From a technological standpoint, the PVI Industries 150,180 includes an intuitive control system that allows users to monitor and adjust settings easily. This sophisticated interface provides real-time data on water temperature, operational status, and maintenance alerts, significantly enhancing user experience and system management.

Safety features are paramount in PVI’s design philosophy. The 150,180 comes equipped with multiple safety mechanisms, including a high-temperature limit switch and a pressure relief valve, ensuring safe operation and compliance with strict industry regulations.

In terms of installation, the PVI Industries 150,180 is engineered with versatility in mind. It can be installed in various configurations, making it adaptable to the spatial constraints of any facility. Maintenance is straightforward, with accessible components designed to reduce downtime and service costs.

Overall, the PVI Industries 150,180 represents a leading choice for commercial water heating solutions, characterized by its efficiency, reliability, and advanced technology, meeting the diverse needs of modern businesses while upholding the highest standards of safety and performance.
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