Lochinvar 151 - 801 service manual Models 601, 4Gas Valve Adjustment Model

Page 38

Service Manual

3Troubleshooting

Model 501

Locate the throttle adjustment screw on top of the gas valve, see FIG. 3-4. Using a screwdriver, turn the screw a 1/4 turn counterclockwise to increase CO2 levels or a 1/4 turn clockwise to decrease CO2 levels. After one adjustment on the valve, follow the Combustion Analysis Procedure on page 36 of this manual to measure the combustion.

If combustion is still not within the specified range, repeat the procedure. This procedure SHOULD NOT be performed more than four (4) times. If after four (4) adjustments and the combustion is still not within the specified range, revisit the possible causes in Table 3H on page 36 or replace the gas valve.

Figure 3-4Gas Valve Adjustment: Model 501

Models 601 - 801

Locate the throttle adjustment screw on top of the gas valve, see FIG. 3-4. Using an Allen wrench, turn the screw a 1/4 turn counterclockwise to increase CO2 levels or a 1/4 turn clockwise to decrease CO2 levels. After one adjustment on the valve, follow the Combustion Analysis Procedure on page 36 of this manual to measure the combustion.

If combustion is still not within the specified range, repeat the procedure. This procedure SHOULD NOT be performed more than four (4) times. If after four (4) adjustments and the combustion is still not within the specified range, revisit the possible causes in Table 3H on page 36 or replace the gas valve.

Figure 3-5Gas Valve Adjustment: Models 601 - 801

THROTTLE

ADJUSTMENT

SCREW

(REMOVE BLUE CAP)

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Contents Models 151 Contents Niosh stated First Aid Please read before proceedingHandling ceramic fiber materials Maintenance What is in this manual?Service TroubleshootingService Armor water heater displaySmart System Control Board Control inputsSmart System Control Board Control outputsHow the water heater operates Access modesGeneral Operation Sequence of operationOperation Display Display panel menu access Button Screen Operation Display StatusDisplay panel parameter access Parameter table GeneralModes Viewable and changeable control parameters Functions DHW SettingsData Logging Anti-CyclingControl modes Minimum On/Off Time Circulation pumpsService Notification Owner maintenance Maintenance Maintenance and annual startupService technician Maintenance Check expansion tank Flue vent system and air pipingCheck water system Check water heater relief valveCheck control settings Check ignition ground wiringCheck all water heater wiring Perform start-up and checksReview with owner Check flame signalCleaning heat exchanger Oiled bearing circulatorsCheck control module fuses TroubleshootingBefore troubleshooting Check the followingOperation No DisplayNo Burner Unit Does NotWire Color R/BK and Y Wire Color G and Y Checking temperature sensorsTemperature F Resistance Ω Resistance TemperatureRelief Valve NoisyNo Pump OpeningFault Description Corrective Action Flow SwitchAnti-cycling Flame Fail IgnNo Flame RunningFlame Sequence Auto ResetManual Reset High LimitGV/Relay Fan LowFan Speed Low FailFlue Temp High Sensor ShortedLouver Proving Delta T HighRem Ctrl Flt Service BlkOutlet Temp High Fatal Error Watch Dog ErrorNo Error Stored Low 24 VACOr Obstruction Combustion Analysis ProcedureGas Valve Adjustment 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.
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