Lochinvar 151 - 801 General Operation, How the water heater operates, Sequence of operation

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Service Manual

1Service

General Operation

How the water heater operates

The Armor water heater uses an advanced stainless steel heat exchanger and an electronic control module that allows fully condensing operation. The blower pulls in gas and air and pushes flue products out of the water heater through the heat exchanger and flue piping. The control module regulates blower speed to control water heater firing rate. The gas valve senses the amount of air flowing into the water heater and allows only the right amount of gas to flow.

Sequence of operation

Table 1A shows control module normal sequences of operation for water heating operation.

Access modes

User

The user can adjust tank target temperatures by pressing the NAVIGATION dial when “$SETPOINTS” is flashing at the bottom of the display. The date and time, and the temperature units can also be changed.

Installer

Most parameters are available only to the installer, accessible by entering the installer password (5309).

Saving parameters (reference the Parameter Table -

Table 1D on pages 12 and 13 of this manual)

NOTICE

Please note that the brackets ([]) denote screen status.

To save parameters and exit programming:

Press the RIGHT SELECT [SAVE] key and then press the RIGHT SELECT [HOME] key.

To enter a parameter and continue programming:

Press the RIGHT SELECT [SAVE] key 1 time to return to the parameter listings; press again to return to the menu listings. Remember to press the RIGHT SELECT [HOME] key when finished programming in order to save the changes made.

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Contents Models 151 Contents Niosh stated First Aid Please read before proceedingHandling ceramic fiber materials What is in this manual? ServiceMaintenance TroubleshootingService Armor water heater displaySmart System Control Board Control inputsSmart System Control Board Control outputsAccess modes General OperationHow the water heater operates Sequence of operationOperation Display Display panel menu access Button Screen Operation Display StatusDisplay panel parameter access Parameter table GeneralModes Viewable and changeable control parameters DHW Settings Data LoggingFunctions Anti-CyclingControl modes Minimum On/Off Time Circulation pumpsService Notification Owner maintenance Maintenance Maintenance and annual startupService technician Maintenance Flue vent system and air piping Check water systemCheck expansion tank Check water heater relief valveCheck ignition ground wiring Check all water heater wiringCheck control settings Perform start-up and checksCheck flame signal Cleaning heat exchangerReview with owner Oiled bearing circulatorsTroubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit Does NotChecking temperature sensors Temperature F Resistance ΩWire Color R/BK and Y Wire Color G and Y Resistance TemperatureNoisy No PumpRelief Valve OpeningFault Description Corrective Action Flow SwitchAnti-cycling Flame Fail IgnNo Flame RunningAuto Reset Manual ResetFlame Sequence High LimitFan Low Fan Speed LowGV/Relay FailSensor Shorted Louver ProvingFlue Temp High Delta T HighRem Ctrl Flt Service BlkOutlet Temp High Watch Dog Error No Error StoredFatal Error Low 24 VACCombustion Analysis Procedure Gas Valve AdjustmentOr Obstruction Gas Supply PressureModel Gas valve adjustment procedureModels 151 4Gas Valve Adjustment Model Models 601

151 - 801 specifications

Lochinvar 151 - 801 is a high-efficiency commercial water heater designed to meet the demanding needs of various applications in the hospitality, healthcare, and educational sectors. This advanced system provides reliable hot water with enhanced performance while promoting energy conservation and sustainability.

One of the standout features of the Lochinvar 151 - 801 is its powerful heating capability. With a robust heating input of up to 150,000 BTU per hour, it ensures a steady supply of hot water even during peak demand times. The efficient heat exchanger design optimizes thermal performance, allowing for quicker recovery rates, which is essential for facilities requiring substantial hot water usage.

This model integrates cutting-edge technologies to maximize energy efficiency. Utilized in the Lochinvar 151 - 801 is the Smart System control technology, which provides precise temperature management and diagnostics. This feature not only enhances operation efficiency but simplifies service and maintenance by providing real-time data and alerts, leading to reduced downtime.

Additionally, the Lochinvar 151 - 801 employs a stainless-steel tank construction that promotes durability and robustness. The tank is adequately insulated to minimize heat loss, thus keeping energy costs down. Its compact design also allows for easy installation in various spaces, including those with limited footprints.

Moreover, the unit features advanced combustion technology, including a modulating gas valve that adjusts the flame size according to demand, promoting even greater efficiency. This ensures that the water heater operates at optimum performance levels, reducing fuel consumption while ensuring a consistent supply of hot water.

Safety is a primary concern for Lochinvar, and the 151 - 801 model includes several integrated safety features, such as an ignition safety shutoff and a temperature/pressure relief valve. These systems work together to provide peace of mind while ensuring the unit operates safely within its designated parameters.

In conclusion, the Lochinvar 151 - 801 is an exemplary choice for commercial applications, offering powerful performance, efficient technologies, durable construction, and enhanced safety features. With its combination of high output and advanced monitoring capabilities, it stands as a reliable solution for organizations seeking an effective hot water heating solution.