3 Troubleshooting

Combustion Analysis

Procedure

1.Turn the main power off to the boiler by placing the “On/Off” switch in the OFF position.

2.Remove the flue temperature sensor from the flue collector. Note: Combustion measurements will be made at this point.

3.Turn the main power on to the boiler by placing the “On/Off” switch in the ON position.

4.Navigate to the Service Screen from the Home Screen by pressing the MAIN MENU button and then the SERVICE button.

5.On the Service Screen place heater into Service Mode by selecting the START button, then selecting Set Gas Valve 1 - High.

6.Insert the probe from a combustion analyzer into the hole left by the removal of the flue temperature sensor.

7.Once the heat exchanger has modulated up to rate, measure the combustion. The values should be in the range listed in Table 3I. CO levels should be less than 200 ppm for a properly installed unit. If the combustion is not within range reference the Troubleshooting Chart below for possible causes and corrective actions.

Service Manual

Table 3I Flue Products

Gas

Natural Gas

 

Propane

 

 

 

 

Valve

 

 

 

 

CO2

O2

CO2

O2

 

1 - High 3.5% - 5.5% 11.2% - 14.8% 5.1% - 6.8% 10.5% - 13.2%

2 - High 7.8% - 8.6% 5.6% - 7.1% 9.4% - 11.0% 4.1% - 6.6%

8.After Gas Valve 1 is set, repeat the same procedure for the second gas train by selecting Set Gas Valve 2 - High on the Service Screen.

9.Once the heater analysis is complete, test the safety shutoff device by turning the manual shutoff valve to the OFF position and ensuring that the heater shuts down and registers an alarm. Open the manual shutoff valve and reset the control.

10.Turn the main power off to the boiler and replace the flue temperature sensor into the flue pipe connection.

11.Place the boiler back into normal operation.

￿WARNING You must replace the flue gas temperature sensor to prevent flue gas spillage into the room. Failure

to comply could result in severe personal injury, death, or substantial property damage.

Table 3H Troubleshooting Chart - Combustion Levels

POSSIBLE CAUSE

CORRECTIVE ACTION

•Refer to Section 2 - General Venting of the Crest Installation and Operation Manual Vent/Air Intake Length for the proper venting and air intake methods for the Crest boiler.

or Obstruction

•Check for obstructions at the vent/air intake terminals.

Gas Supply Pressure

• Refer to Section 6 - Gas Connections of the Crest Installation and Operation

 

Manual for the proper gas supply for the Crest boiler.

 

 

Dirty/Damaged Burner

• Refer to page 34 of this manual for burner removal and cleaning procedures.

• Replace burner if necessary.

 

 

 

Gas Valve Adjustment

• Refer to page 53 of this manual for the gas valve adjustment procedure.

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Lochinvar 3 Combustion Analysis Procedure, Or Obstruction, Gas Supply Pressure, Dirty/Damaged Burner, Gas Valve Adjustment
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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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