Copper-fin II/IIE Boiler and Water Heater Service Manual

2 Maintenance (continued)

Access to the burners will require the following steps: Checking combustion air pressure

1.Turn off main electrical power to the appliance.

2.Turn off main manual gas shutoff to the appliance.

3.Remove the upper and lower outer front access doors.

4.Disconnect the manifold(s) from the gas train using the union(s) just below each gas valve.

5.Disconnect the wiring to the hot surface igniter(s) and ground.

6.Disconnect burner pressure line at burner.

7.Remove the screws from the manifold mounting bracket(s) and remove the manifold(s).

8.Remove the screws from the burner mounting flanges and slide the burner(s) out toward the front of the unit. Use caution to prevent damage to the burners, refractory, hot surface igniter, and wiring.

9.Remove soot from the burners with a stiff bristle brush. Dirt may be removed from the burner ports by rinsing the burner thoroughly with water. Drain and dry burners before re-installing. Damaged burners must be replaced.

10.Reassemble in reverse order.

NOTICE

When installed in a dusty and dirty location,

 

the burners may require cleaning on a 3 to 6

 

 

month schedule or as needed, based on the

 

severity of contamination. Contaminants

 

can be drawn in with the combustion air.

 

Non-combustible particulate matter such as

 

dust, dirt, concrete dust, or drywall dust can

 

bloc burner ports and cause non-warrantable

 

failure. The standard inlet air filter will help

 

eliminate dust and dirt from entering the

 

unit.

The combustion air fans are factory pre-set and should not require adjustment in most cases. Follow the steps in the Checking / Adjusting Combustion Air Pressure Section to adjust the fan if a continuous Low Air status code occurs.

NOTICE

On the 399,999 - 750,000 Btu/hr models,

the air shutter is adjusted to the side of the

 

 

fan as depicted in FIG. 2-2. On the 990,000

 

- 2,070,000 Btu/hr models, the air shutter is

 

adjusted by sliding the arm located on the

 

front of the air box as depicted in FIG. 2-3.

Check for proper installation and draft in the venting system prior to any adjustments. Correct as needed.

Figure 2-2_Adjusting air shutter - 399,999 - 750,000 Btu/ hr Models

LESS AIR

MORE AIR

AIR SHUTTER

Figure 2-3_Adjusting air shutter - 990,000 - 2,070,000 Btu/hr Models

NOTICE

While burners are removed, check the heat exchanger surface for sooting. If present, the heat exchanger must be cleaned. Reference the Heat Exchanger Cleaning procedures in this manual.

MORE AIR

LESS AIR

AIR SHUTTER

ADJUSTING BRACKET

29

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Lochinvar 402 - 2072 service manual 2Adjusting air shutter 399,999 750,000 Btu/ hr Models
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402 - 2072 specifications

The Lochinvar 402 - 2072 is a versatile and highly efficient boiler designed to meet the heating demands of modern residential and commercial applications. This model stands out due to its innovative technologies, advanced features, and a high level of reliability, making it an ideal choice for consumers looking for an enduring and economical heating solution.

One of the primary characteristics of the Lochinvar 402 - 2072 is its impressive energy efficiency. With an exceptional annual fuel utilization efficiency (AFUE) rating, this boiler ensures minimal energy waste, allowing homeowners and business operators to save significantly on their energy bills. The model incorporates advanced condensing technology that enables it to extract heat from the combustion gases, maximizing heat transfer and reducing emissions.

The Lochinvar 402 - 2072 is built with a robust stainless steel construction that enhances durability and resilience against corrosion and other environmental factors. This material not only prolongs the lifespan of the unit but also contributes to its outstanding thermal efficiency. Additionally, the boiler's compact design allows for flexible installation options, making it suitable for various spaces, including tight utility rooms and basements.

Equipped with a user-friendly control interface, the Lochinvar 402 - 2072 allows for easy monitoring and adjustment of settings. Its advanced digital display provides real-time data on system performance, ensuring the operator can maintain optimal performance and efficiency.

Another noteworthy feature is the unit's quiet operation. The design includes sound-dampening insulation and high-efficiency circulators, keeping noise to a minimum, which is an essential trait for both residential and commercial settings.

The Lochinvar 402 - 2072 is also designed with safety in mind. It incorporates multiple safety features including an automated vent damper, low water cutoff, and a comprehensive control system that monitors various operating conditions. This proactive approach to safety ensures that potential issues are identified and addressed before they become critical.

In conclusion, the Lochinvar 402 - 2072 boiler presents an exceptional combination of efficiency, durability, and user-friendly features. Its advanced condensing technology, stainless steel construction, and focus on safety make it a leading choice in the competitive boiler market, catering to the heating needs of a diverse range of applications while ensuring environmental responsibility. For those in search of a dependable and efficient heating solution, the Lochinvar 402 - 2072 is certainly worth considering.
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