PVI Industries PV500-44U manual Sequence of Operation, Incoming 120VAC

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12.2The Following Describes The Functions Of Each Of These Terminals And The Factory-Installed Options Required To Activate The Terminals:

Note: Terminal P1-P2are functional only when the water heater is equipped with the factory installed options required to activate the terminals. Terminals R1-R2,A1-A2,C1-C2and T1-T2are standard pre-wired functions on all models.

R1-R2:Used to activate / de-activate water heater from remote master control.

Terminals are wired to a relay in a remote Energy Management System. When relay closes, circuit from R1 to R2 is completed and appliance controls are enabled. Appliance ships from factory with jumper between terminals Remove jumper when connecting to a remote controller.

A1-A2:Used to activate a remote alarm, signaling shutdown of combustion control.

Provides a maximum 10 amp relay contact closure when the flame safeguard terminates combustion due to a tripped safety interlock (i.e.: air proving switch, high limit switch, low water flow switch or flame sensor, etc.).

P1-P2:Activates remote equipment and requires confirmation signal back to the appliance.

Provides a maximum 10-amp relay contact closure to activate a remote device (i.e.: mechanical room air louvers, draft inducer or power vent, etc.). The remote device must send return signal via proving switch to confirming proper operation to terminals C1-C2, prior to the appliance being able to energize. Options Required - Consult Factory.

C1-C2:Used for proving operation of remote device.

Terminals are wired to a proving switch on a remote device such as a power venter. When relay closes, circuit from C1 to C2 is completed and appliance controls are enabled. This appliance ships form the factory with jumper between terminals.

T1-T2:Used for external modulation control.

To connect external modulation control, disconnect and cap the blue wire connected to terminal T2 and connect the external modulating signal to terminals T1 (positive) and T2 (negative).

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.

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PV500-44U 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 Series Electrical Requirements Water Heater InstallationChecking Equipment Before You Install CodesInlet and Outlet Connections Service ClearancesClearances To Combustible Surfaces General Piping GuidelinesPV500-44U 06/12 PV500-44U 06/12 Optional Condensate Neutralization System GAS Supply and Piping Inlet Pressure NAT. GASConvert Fittings to Equivalent Straight Pipe Inches Single Unit Installation Suggested Pipe SizeMultiple Unit Installations GAS Piping Size Chart Nominal Iron Length of Pipe in Straight FeetCombustion and Ventilation AIR Vertical or Horizontal Remote Air Duct Termination Duct Fitting Equivalent Length Duct PipeVenting the Power VT Plus Sani models Venting the Power VT PlusVenting Vent Fitting Equivalent Length Vent Pipe Maximum Category IV Vent Length Equivalent LengthVertical or Horizontal Vent Termination Operating and Safety Controls Temperature and Pressure Relief ValvesCombining Category IV Vents Electronic Low Water Cut-Off Optional Operating Temperature ControlHigh Water Temperature Limit Control Cathodic ProtectionClock Temptrac Electronic Controller PanelSET DownTo View The Setpoint To Change The SetpointTo Change Other Parameters Remote Connections Terminal Strip LED Display Alarm MessagesAlarm Cause Results of Alarm Condition Message Recommended ActionIncoming 120VAC Sequence of OperationLED Indication Fault Mode Loss of Flame SignalInitial Startup Turn-on main gas shutoff valve PVI Industries customer service for assistance Gas Train Illustration for Models 65 through Gas Train Illustration for Models 40 throughProblem 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 Contact factory for more information Burner Assembly ComponentsPeriodic Maintenance PV500-44U 06/12 Recommended Maintenance Schedule PV500-44U 06/12

PV500-44U specifications

PVI Industries is a well-established name in the manufacturing of innovative water heating solutions, and one of its standout products is the PV500-44U. This commercial water heater is specifically designed to meet the demands of medium to large-scale facilities, ensuring efficient and reliable hot water delivery.

The PV500-44U is a high-capacity, gas-fired water heater, offering a remarkable output of up to 500,000 BTU per hour. This impressive capacity makes it suitable for a variety of applications, including hospitality, healthcare, and industrial washing. With such power, it provides continuous hot water, which is vital in settings that require consistent hot water availability.

One of the key features of the PV500-44U is its robust construction. The unit is designed with high-quality stainless steel, which provides durability and resistance against corrosion. This is crucial for maintaining long-term reliability, especially in environments where water quality may vary. Additionally, the water heater utilizes a sophisticated insulation system that minimizes heat loss, ensuring that energy consumption remains efficient.

The PV500-44U incorporates advanced technologies aimed at enhancing performance and user control. It features a state-of-the-art digital control system that allows for precise temperature settings and monitoring. This system not only ensures optimal performance but also enhances safety by providing alerts for any operational anomalies.

Another notable characteristic of the PV500-44U is its eco-friendly design. It is engineered to meet the latest environmental regulations, which helps reduce carbon emissions and energy consumption. The unit’s high thermal efficiency contributes to lower operating costs, making it an economical choice for businesses looking to manage their energy expenses effectively.

In terms of maintenance, the PV500-44U offers user-friendly access to components, simplifying routine servicing and repair tasks. This thoughtfully designed structure helps extend the lifespan of the unit and minimize downtime, which is critical for maintaining hot water availability in commercial settings.

Overall, the PVI Industries PV500-44U stands out as a reliable and efficient water heating solution that effectively meets the high demands of commercial applications. Its combination of powerful output, robust construction, advanced technology, and eco-friendly features makes it a premium choice for businesses seeking quality and efficiency in their hot water systems.
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