Lochinvar 151 - 801 service manual Data Logging, Functions, DHW Settings, Anti-Cycling

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Service Manual

1Service (continued)

B: Data Logging

Reset last 10 errors

The reset last 10 errors function clears the last 10 errors log.

C: Functions

Service Mode Delay

By pressing the pin button on the front of the display for five (5) seconds, the control will be placed in Service Mode. This will override all other heat demands. The Service Mode allows the installer to set the unit to either maximum firing rate or minimum firing rate for the purpose of combustion analysis. The delay sets the length of time the water heater will stay in the Service Mode if no keys have been pressed before going back to its original state. This parameter can only be changed by the installer by accessing parameter C1. The time range of this parameter is 0 to 30 minutes. The default value is 20 minutes.

D: DHW Settings

Tank Set Point

By installing a tank sensor, the SMART SYSTEM control can perform the tank thermostat function. The SMART SYSTEM control automatically detects the presence of this sensor, and generates a DHW call for heat when the tank temperature drops below the tank set point differential (parameter D3), and finishes the call for heat when the tank temperature reaches tank set point. This parameter can be changed by the installer by accessing parameter D1. The temperature range of this parameter is 68°F (20°C) to 190°F (88°C). The default value is 125°F (52°C).

Tank Set Point Offset

The tank set point offset measures how far the actual temperature must go above the set point before the call for heat ends (the water heater will turn off). This parameter can be changed by the installer by accessing parameter D2.

Tank Set Point Differential

When a tank sensor is installed, the tank temperature must drop this amount below the tank set point (parameter D1) before the heater will turn on. The installer can adjust this setting by accessing parameter D3. The minimum setting is 0° (0°C), and the maximum is 40°F (22°C). The default setting is 6°F (3°C).

Tank Minimum Set Point

This setting controls the minimum user set point for the tank temperature. The installer can adjust this by accessing parameter D4. The minimum setting is 60°F (16°C) and the maximum setting is the maximum tank set point (parameter

D5).

Tank Maximum Set Point

This setting controls the maximum user set point for the tank temperature. The installer can adjust this by accessing parameter D5. The minimum setting is the minimum tank set point (parameter D4) and the maximum setting is 185°F (85°C).

E: Anti-Cycling

Anti-Cycling Time

Once a SH demand has been satisfied, a set amount of time must elapse before the control will respond to a new SH demand. The control will block the new heat demand and anti-cycling will be shown in the display until the time has elapsed or the water temperature drops below parameter E2. This parameter can be changed by the installer by accessing parameter E1. The time range for this parameter is 0 minutes to 10 minutes. The default value is 1 minute.

Anti-Cycling Override Differential

The control will bypass the anti-cycling time if the water temperature drops too quickly. The control will use the water temperature the water heater was at when it shut off as the starting point. If the temperature drops below the temperature parameter the control will abort anti-cycling and allow the water heater to fire. This parameter can be changed by the installer by accessing parameter E2. The temperature range of this parameter is 0°F (0°C) to 54°F (30°C). The default value is 10°F (6°C).

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Contents Models 151 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid Troubleshooting What is in this manual?Service MaintenanceArmor water heater display ServiceControl inputs Smart System Control BoardControl outputs Smart System Control BoardSequence of operation Access modesGeneral Operation How the water heater operatesOperation Display Button Screen Operation Display Status Display panel menu accessDisplay panel parameter access General Parameter tableModes Viewable and changeable control parameters Anti-Cycling DHW SettingsData Logging FunctionsControl modes Circulation pumps Minimum On/Off TimeService Notification Maintenance Maintenance and annual startup Service technicianOwner maintenance Maintenance Check water heater relief valve Flue vent system and air pipingCheck water system Check expansion tankPerform start-up and checks Check ignition ground wiringCheck all water heater wiring Check control settingsOiled bearing circulators Check flame signalCleaning heat exchanger Review with ownerCheck the following TroubleshootingBefore troubleshooting Check control module fusesUnit Does Not No DisplayNo Burner OperationResistance Temperature Checking temperature sensorsTemperature F Resistance Ω Wire Color R/BK and Y Wire Color G and YOpening NoisyNo Pump Relief ValveFlow Switch Fault Description Corrective ActionFlame Fail Ign Anti-cyclingRunning No FlameHigh Limit Auto ResetManual Reset Flame SequenceFail Fan LowFan Speed Low GV/RelayDelta T High Sensor ShortedLouver Proving Flue Temp HighService Blk Outlet Temp HighRem Ctrl Flt Low 24 VAC Watch Dog ErrorNo Error Stored Fatal ErrorGas Supply Pressure Combustion Analysis ProcedureGas Valve Adjustment Or ObstructionGas valve adjustment procedure Models 151Model Models 601 4Gas Valve Adjustment Model

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.
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