Lochinvar 1.3, 1.5 service manual Checking temperature sensors, Temperature Resistance

Page 40

Service Manual

3 Troubleshooting

Checking temperature sensors

The water heater temperature sensors (inlet water, outlet water, system water, and flue) are all resistance type devices. The following tables show the correct values for the sensors at various temperatures. Use an ohmmeter to read the resistance of the sensor at a known temperature. If the resistance of the sensor does not closely match its corresponding table, replace the sensor.

Table 3B - Inlet/Outlet and Tank Sensor Resistance vs. Temperature

 

Temperature

Resistance

Temperature

Resistance

 

 

 

 

 

 

 

 

50

 

18,780

 

158

1,990

 

 

 

 

 

 

 

 

68

 

12,263

 

176

1,458

 

86

 

8,194

 

194

1,084

 

104

 

5,592

 

212

817

 

 

 

 

 

 

 

 

122

 

3,893

 

--

--

 

 

 

 

 

 

 

 

140

 

2,760

 

--

--

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 3C - Flue Temperature Sensor Resistance vs. Temperature

 

 

 

 

 

 

 

 

 

Temperature

 

Resistance

 

Temperature

Resistance

 

 

 

 

 

 

 

 

68

 

14,773

 

176

1,707

 

 

 

 

 

 

 

 

86

 

9,804

 

194

1,266

 

 

 

 

 

 

 

 

104

 

6,652

 

212

952

 

 

 

 

 

 

 

 

122

 

4,607

 

230

726

 

 

 

 

 

 

 

 

140

 

3,252

 

248

560

 

 

 

 

 

 

 

 

158

 

2,337

 

--

--

 

 

 

 

 

 

 

40

Image 40
Contents Models 1.0, 1.3, Contents Handling ceramic fiber materials Niosh stated First AidMaintenance ServiceTroubleshooting Armor X2 display Control inputs Primary Smart Control ModuleSecondary Smart Touch Control Module Primary Control outputsHow the water heater operates General OperationSequence of operation Sequence of operation Sequence of operationThis table lists the parameters and where to access them Parameter tableBMS Viewable and changeable control parameters Status ScreenService Details Screen Service Main Screen Setup Screen Service/Setup Parameters Screen Service Set Point Parameters Screen Night Setback Parameters Screen Cascade Parameters Screen Cascade Operation10Vdc BMS Parameters Screen 10Vdc OperationService Cascade Screen Service Temps Screen Burners Screen Graph Select Screen History Screen Service Mode Screen Maintenance Maintenance and annual startup Address reported problems Clean condensate trapInspect water heater area Inspect water heater interiorCheck water system Flue vent system and air pipingCheck expansion tank Check water heater relief valve Check ignition ground wiring Check all water heater wiringCheck control settings Check flame signalCheck Delta T Cleaning water heater heat exchangerOiled bearing circulators Troubleshooting Alarm ScreenCheck the following Before troubleshootingCheck control module fuses Troubleshooting Checking temperature sensors Temperature ResistanceFault Cause Corrective Action Flow Switch CondensateDrain Blocked Flame outFlame Lost Light cont’dWhile Running Cont’d Manual ResetHigh Limit Automatic Reset High Limit / HEXTemp SW Blower RPM’sLouver Proving Switch Too HighSensor Open Sensor ShortedResets Try Later Air Flow TooLow Flap ValveInternal Fault No Error StoredWriting to MemosCombustion Analysis Procedure Gas Valve AdjustmentOr Obstruction Gas Supply PressureModel Gas valve adjustment procedureModels 1.3
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1.5, 1.3, 1 specifications

Lochinvar 1 is a remarkable achievement in the realm of modern technology and engineering. As a powerful and efficient water heater, it has been designed to cater to a wide range of residential and commercial needs. One of the standout features of Lochinvar 1 is its advanced heating technology, which incorporates a high-efficiency condensing design. This technology allows the unit to achieve impressive energy savings by maximizing heat transfer while minimizing energy consumption.

The Lochinvar 1 utilizes a stainless steel heat exchanger that enhances durability and corrosion resistance. This not only extends the lifespan of the unit but also ensures consistent performance over time. Coupled with a user-friendly control system, users can easily adjust settings and monitor performance, enhancing overall convenience and usability.

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Moreover, the unit supports various venting options, offering flexibility during installation. Whether using traditional vertical venting or innovations like direct venting, Lochinvar 1 accommodates different building designs and local codes, making it highly versatile.

In conclusion, Lochinvar 1 epitomizes the melding of efficiency, reliability, and user-friendly technology. With its high-performance features, robust safety systems, and adaptable installation options, it stands out as a forefront player in the water heating industry, meeting the diverse needs of today's consumers and businesses alike.