Lochinvar 1.5, 3.5, 2.5 service manual Burner Supply, Temperature, Differential

Page 49

Service Manual

3 Troubleshooting (continued)

Table 3G (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

FAULT

DESCRIPTION

 

CORRECTIVE ACTION

 

 

 

 

 

• Check the wiring connections to switch. Wires should

 

 

 

be connected to the common and normally open

 

 

 

terminals.

 

 

 

•

Remove switch and check for blockage in the orifice.

 

 

• Vent/air intake lengths exceed the maximum allowed

Blower Proving

 

 

lengths. Refer to Section 2 - General Venting of the

 

 

Crest Installation and Operation Manual for

Switch Open 2

 

 

proper lengths.

 

(will require a manual

 

• Check for obstruction or blockage in

the vent/air

reset once the condition

Pressure switch contacts are open.

 

intake pipes or at terminations.

 

has been corrected. Press

• Inspect the burner. Reference page 34 of this manual

the RESET button on the

 

 

 

for removal and cleaning procedures.

Replace if

display to reset.)

 

 

 

 

necessary.

 

 

 

 

 

 

 

• Verify combustion air blower 2 is operating. Replace if

 

 

 

necessary.

 

 

 

• Inspect the heat exchanger. Reference page 35 of

 

 

 

this manual for removal and cleaning procedures.

 

 

• Faulty pressure switch. Replace switch.

 

 

 

Burner Supply

 

• Inspect the combustion air temperature sensor and

Temperature

 

 

associated wiring.

 

Differential

Combustion air to burner 1 temperature

• Measure the resistance of the combustion air

(will require a manual

is higher than combustion air to burner 2

 

temperature sensor and compare to Table 3E on

reset once the condition

temperature or vice versa.

 

page 38 of this manual

 

has been corrected. Press

 

• Replace the sensor if necessary.

 

the RESET button on the

 

• Verify that the vent / air intake pipes

are properly

display to reset.)

 

 

installed and that there are no obstructions.

 

 

 

 

 

• Check if the vent backflow preventer is installed for

Burner Supply

 

 

boilers commonly vented.

 

Temperature

 

• Check if the vent backflow preventer is stuck open

High 1

 

 

while the unit is off.

 

(will require a manual

Combustion air temperature is very high.

• Inspect the combustion air temperature sensor and

reset once the condition

 

associated wiring.

 

 

 

 

has been corrected. Press

 

• Measure the resistance of the combustion air

the RESET button on the

 

 

temperature sensor and compare to Table 3E on

display to reset.)

 

 

page 38 of this manual.

 

 

 

•

Replace the sensor if necessary.

 

 

 

 

 

 

• Check if the vent backflow preventer is installed for

Burner Supply

 

 

boilers commonly vented.

 

Temperature

 

• Check if the vent backflow preventer is stuck open

High 2

 

 

while the unit is off.

 

(will require a manual

Combustion air temperature is very high.

• Inspect the combustion air temperature sensor and

reset once the condition

 

associated wiring.

 

 

 

 

has been corrected. Press

 

• Measure the resistance of the combustion air

the RESET button on the

 

 

temperature sensor and compare to Table 3E on

display to reset.)

 

 

page 38 of this manual.

 

 

 

•

Replace the sensor if necessary.

 

 

 

 

 

 

49

Page 48 Page 50
Image 49
Page 48 Page 50
Contents Models 1.5 2.0 2.5 3.0 Contents Handling ceramic fiber materials Please read before proceedingNiosh stated First Aid When servicing boiler Service What is in this manual?Maintenance TroubleshootingBoiler piping ServiceHome Screen Control inputs Smart Control ModuleStrip Control outputsGeneral Operation Access modesHow the boiler operates How the control modules operateTo adjust and save parameters reference FIG Sequence of operation Value Access Sub Parameter Name See Min Max Default User InstallerParameter table MenuDelay Ramp BMS Setup Setback HWG Night Pumps Viewable and changeable control parameters Initial SetupSet Points Outdoor Reset Ramp Delay Advanced Setup SH/HWG Night Setback Cascade ModBusCascade Offset Minimum On/Off TimePumps Service Notification in Months Service NotificationService Notification Running Hours Service Notification Cycles8Cascade Screen Service Cascade Screen9Graph ScreenParameter Selection Graph Screen11History ScreenLockout Faults Service History Screen13History ScreenRuntime History 14Service Screen Service ScreenService technician Maintenance Maintenance and annual startupOwner maintenance See the Crest User’s Information Manual for InstructionsMaintenance Check water system Flue vent system and air pipingCheck expansion tank Check boiler relief valveCheck all boiler wiring Check ignition ground wiringCheck control settings Check flame signalReview with owner Cleaning boiler heat exchangerBefore troubleshooting TroubleshootingCheck the following Check control module fusesTroubleshooting Checking temperature sensors No Pump Cutoff Open Low WaterFlame Failure Anti-cyclingIgnition Flame Out Flame Out SequenceRunning Unit was running and lost the flame Gas Valve / Relay FailureManual Reset Auto ResetHigh Limit High Limit OpenFault Description Corrective Action Flue Temp High Louver Proving Sw OpenDelta T High Outlet TempOutlet Temp High Service BlkRem Ctrl Flt Parameters SavedSensor Open Switch OpenSensor Shorted Flue SensorBurner Supply TemperatureDifferential Internal Fault Resets Try LaterToo Many Writing toNo Error Stored Watch Dog ErrorWrite EEProm CRC ParametersGas Valve Adjustment Combustion Analysis ProcedureOr Obstruction Gas Supply Pressure2Gas Valve Adjustment Models 1.5 Gas valve adjustment procedurePage
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3, 2, 3.5, 2.5, 1.5 specifications

Lochinvar is a leader in manufacturing high-efficiency water heating solutions, and their Lochinvar 1.5, 1.3, and 1.0 models exemplify the company's commitment to innovation and performance. These advanced heating systems are designed to meet the diverse needs of commercial and residential applications, providing reliable hot water while ensuring energy efficiency and environmental sustainability.

The Lochinvar 1.5, 1.3, and 1.0 models incorporate cutting-edge technologies that set them apart from traditional water heaters. One of the most notable features is their use of high-efficiency condensing technology, which extracts maximum heat from the combustion process. This process allows the units to achieve high thermal efficiencies, often exceeding 95%, which not only reduces energy costs but also lowers greenhouse gas emissions.

In terms of design, Lochinvar's models are constructed with durable materials, ensuring longevity and reliability in demanding environments. The stainless steel heat exchanger is a key element that contributes to the durability and performance of the units. This material is resistant to corrosion and scale build-up, enhancing the lifespan of the heater and reducing maintenance requirements.

The Lochinvar 1.5, 1.3, and 1.0 models feature advanced control systems that provide precise temperature management and easy operation. The intuitive digital display allows users to monitor performance metrics, temperature settings, and energy consumption with ease. Additionally, these units are equipped with intelligent modulating gas valves that optimize fuel usage based on demand, ensuring efficient operation across various load conditions.

Safety is a priority in the design of Lochinvar's water heaters. The models come with built-in safety features, including flame failure detection, overheat protection, and venting safeguards. These systems work together to ensure the safe operation of the units, giving users peace of mind.

Another characteristic that makes the Lochinvar 1.5, 1.3, and 1.0 models popular among users is their compact design. These units are engineered to fit in tight spaces, making them ideal for installations where space is at a premium. Despite their small footprint, they deliver powerful performance, ensuring that users have access to the hot water they need.

In summary, Lochinvar's 1.5, 1.3, and 1.0 water heating models represent the pinnacle of efficiency, safety, and reliability. With their advanced technologies, durable construction, and user-friendly features, these units are an excellent choice for anyone seeking a high-performance water heating solution.
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