2 Maintenance

Inspect ignition and flame sense electrodes

1.Remove the ignition and both flame sense electrodes from the burner plate.

2.Remove any deposits accumulated on the ignition/ flame sense electrodes using sandpaper. If the electrodes cannot be cleaned satisfactorily, replace with new ones.

3.Replace ignition/flame sense electrodes, making sure the gaskets are in good condition and correctly positioned.

Check ignition ground wiring

1.Inspect boiler ground wire from the heat exchanger access cover to ground terminal strip.

2.Verify all wiring is in good condition and securely attached.

3.Check ground continuity of wiring using continuity meter.

4.Replace ground wires if ground continuity is not satisfactory.

Check all boiler wiring

1.Inspect all boiler wiring, making sure wires are in good condition and securely attached.

Check control settings

1. Navigate to the Setup Screen and check all settings. See Section 1 of this manual. Adjust settings if necessary. See Section 1 of this manual for adjustment procedures.

2.Check settings of external limit controls (if any) and adjust if necessary.

Perform start-up and checks

1.Start boiler and perform checks and tests specified in Section 9 - Start-up of the Crest Installation and Operation Manual.

2.Verify cold fill pressure is correct and that operating pressure does not go too high.

Check burner flame

1.Inspect flame through observation windows.

2.If the flame is unsatisfactory at either high fire or low fire, remove and clean the burner. Clean the burner thoroughly using a vacuum cleaner or compressed air. Do not use compressed air to clean the burner if cleaning is performed inside a building.

Service Manual

•Shut down the boiler:

-Follow the “To Turn Off Gas to Appliance” instructions for the boiler in Section 9 - Startup of the Crest Installation and Operation Manual.

-Do not drain the boiler unless it will be exposed to freezing temperatures. If using freeze prevention fluid in system, do not drain.

3.Allow time for the boiler to cool to room temperature if it has been firing.

4.Remove the top access panel to remove the gas/air manifold assembly.

5.Remove the nuts securing the burner to the burner mounting plate. Remove the burner (FIG. 2-2).

6.When replacing the burner, ensure gaskets are in good condition and positioned correctly (FIG. 2-2).

7.When securing the burner, be sure to tighten the nuts, but DO NOT over-tighten. Tighten the nuts to a torque setting of no more than 6.2 ft.-lbs. When securing the burner mounting plate be sure to tighten the nuts, but DO NOT over-tighten. Tighten the nuts to a torque setting of no more than 15.5 ft.-lbs.

Figure 2-2Burner Assembly

INSULATION

AIR/GAS

MANIFOLD

MANIFOLD

GASKET

BURNER

ASSEMBLY

BURNER

GASKET

BURNER PLATE

FIBERBOARD

Check flame signal

1.At high fire of each combustion system, the flame signal shown on the display should be at least 10 microamps.

2.A lower flame signal may indicate a fouled or damaged flame sense electrode. If cleaning the flame sense electrodes does not improve, ground wiring is in good condition, and ground continuity is satisfactory, replace the flame sense electrode.

3.See Section 3 - Troubleshooting in this manual for other procedures to deal with low flame signal.

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Lochinvar 2, 1.5, 3.5 Inspect ignition and flame sense electrodes, Check ignition ground wiring, Check all boiler wiring
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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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