Lochinvar CBN1257, 673 1, CBN2067, CBN1437, CBN1797 User Manual

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Lochinvar CBN1257, 673 1, CBN2067, CBN1437, CBN1797 User Manual

Copper-Fin®

Commercial Gas

Boilers

Energy Efficient, Cost Effective Boilers

Lochinvar first introduced Copper-Fin technology to the boiler industry some 50 years ago. Since then, we’ve continued to refine and perfect it - adding advanced fan-assisted combustion, hot surface ignition, a unique gasketless copper finned tube heat exchanger and highly efficient insulating materials.

Installation Flexibility and Cost-Savings

With compact sizes that use less floor space than ever before, all Copper-Fin units are narrow enough to fit through a standard

36” doorway – an advantage most commercial boilers can’t provide. Plus, thanks to special insulating materials, Copper-Fin units require only 3” clearance from combustible walls. What’s more, our

Stack Frame allows you to install two units in the area normally required for one. This makes it easier to fit multiple Copper-Fin boilers into cramped mechanical rooms. And you

can even use a smaller diameter vent stack - up to 8” smaller than typically required for comparable atmospheric boilers - so it saves money as well as valuable mechanical room space.

Enhanced to Provide Performance and Serviceability

Unique Copper-Fin Heat Exchanger

The Lochinvar Copper-Fin boiler design uses a two is circulated through finned copper tubes.

flow creates a

that prevents sediment buildup, common

conventional boilers, and finned copper tubes

allow maximum heat transfer efficiency. To create this special

heat transfer capability, extrudes the fins

copper tubing to precise specifications - exactly 7 fins per inch.

The result is an integrally-finned tube with a heat transfer ratio 9 times greater than a plain copper tube.

Heavy-Duty Gasketless Design

What’s more, advanced casting processes allowed Lochinvar to develop a unique one-piece header system. This gasketless design provides enhanced reliability, improved durability and optimum performance - without the problems or failures common with O-rings and gaskets.

Meets the Toughest Air Quality Standards

Because of our unique fan-assisted combustion process, the Copper-Fin exceeds today’s toughest NOx emissions requirements. An independent certification laboratory test gave us a rating of less than 20 ppm - corrected to 3% O2. And less NOx means a cleaner environment.

Our enhanced Copper-Fin models offer the same reliable operation, and feature a more service friendly design. The down stream test valves and referenced gas valves are now in the upper deck for easier access, and the electrical and BMS connections have been repositioned to the front of the unit for easier installation.

The gas valves, which are referenced to the sealed combustion chamber, improve operational performance by monitoring the pressure in the sealed combustion chamber and adjusting gas flow to maintain the optimum air/fuel mixture. And the built-in air inlet filter reduces maintenance and improves performance by trapping dust and airborne particulates that can foul the burners and blowers. With dual sight glasses (one on each end), you can easily monitor burner performance and flame characteristics throughout the entire combustion chamber.

The operator interface panel provides two-stage electronic temperature control and comprehensive diagnostic status

without opening the control panel. Its user friendly design simplifies service while providing additional diagnostic information through a series of LEDs.

Vent Cost-Savings

Btu/hr

CONVENTIONAL

COPPER-FIN

 

INPUT

VENT SIZE

VENT SIZE

$ SAVINGS*

495,000

10”

6”

$ 382

645,000

12”

8”

$ 504

745,000

14”

8”

$ 829

985,000

16”

10”

$ 1,228

1,225,000

16”

12”

$ 992

1,435,000

18”

12”

$ 1,466

1,795,000

20”

14”

$ 1,564

2,065,000

22”

14”

$ 2,398

*Comparison based on 25´ vent system using Type “B” double wall vent material, storm collar and vent cap.

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