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

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 cop per finned tube heat
ex chang er 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 ad van tage 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 me chan i cal 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.

Unique Copper-Fin Heat Ex chang er

The Lochinvar Copper-Fin boiler design uses a two

pass heat ex chang er. Water is circulated through

a row of high ly-efficient, finned copper tubes.

The high rate of water flow creates a

scour ing action that prevents sed i ment

and lime-scale buildup, common

in conventional boilers, and

the finned copper tubes

allow maximum heat

transfer efficiency.
To create this special

heat transfer capability,

Lochinvar extrudes the fins

from thick wall copper tubing to

precise specifications - ex act ly 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% O

NOx means a cleaner environment.

. And less

2

Enhanced to Provide Performance and Serviceability

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 $ S

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.

Copper-Fin

®

Commercial Gas
Boilers

AVINGS*

Copper-Fin® Boiler Dimensions & Specifications

Copper-Fin Heating Boiler Dimensions & Spec i fi ca tions

Input Heating Net
Model Max Thermal Capacity I=B=R Gas Vent Shipping
Number MBH Efficiency MBH MBH A B C D E F G Conn. Size Weight

CBN0497 495 81% 401 349 31-1/2” 45-1/4” 22-1/4” 12-1/2” 9-1/2” 22-3/4” 29-1/2” 1-1/4” 6” 440
CBN0647 645 81% 522 454 31-1/2” 56-3/4” 22-1/4” 12-1/2” 9-1/2” 28-1/2” 29-1/2” 1-1/4” 8” 510
CBN0747 745 81% 603 524 31-1/2” 64” 22-1/4” 12-1/2” 9-1/2” 32” 29-1/2” 1-1/4” 8” 550
CBN0987 985 81% 798 694 36” 48-1/4” 33-1/2” 15-3/4” 8-1/2” 8-1/2” 33-3/4” 2” 10” 845
CBN1257 1255 81% 1,017 884 36” 58-1/2” 33-1/2” 15-3/4” 9-1/2” 10-1/2” 33-3/4” 2” 12” 905
CBN1437 1435 81% 1,162 1,010 36” 68-3/4” 33-1/2” 15-3/4” 10-1/2” 10-1/2” 33-3/4” 2” 12” 1050
CBN1797 1795 81% 1,454 1,264 36” 82-1/4” 33-1/2” 15-3/4” 11” 11” 33-3/4” 2” 14” 1193
CBN2067 2065 81% 1,673 1,455 36” 92-1/2” 33-1/2” 15-3/4” 11” 11” 33-3/4” 2” 14” 1350

Notes: Change ‘N’ to ‘L’ for LP gas models. Water connections for models CB 0497-747 are 2” NPT on 6-1/2” centers.
No deration on LP models. Water connections for models CB 0987-2067 are 2-1/2” NPT on 11-1/4” centers.
Performance data based on manufacturer test results.

Standard Features

• 81% Thermal Efficiency

• Electronic Temperature Control

• Fan Assisted Combustion

• Sealed Combustion Chamber

• Stainless Steel Burners

• Low NOx Operation Exceeds the most

Stringent Air Quality Requirements

• ASME Copper Finned Tube

Heat Exchanger

• 160 psi Working Pressure

• Gasketless Heat Exchanger Design

• Pump Relay w/ Delay

• Down Stream Test Valve

• Referenced Gas Valves

• Loch-Heat Ceramic Tile

Combustion Chamber

• Hot Surface Ignition

• Adjustable High Limit w/ Manual Reset

• ASME Pressure Relief Valve

• Temperature & Pressure Gauge

• Flow Switch

• 24 Volt Control System

• BMS Terminal Strip

• Combustion Air Filter

• Freeze Protection

• 10 Year Limited Warranty on Heat

Exchanger (See warranty for details)

Optional Equipment

• Alarm Bell

• Contacts on any Failure

• Contacts for Air Louvers

• Cupro-Nickel Heat Exchanger

• High & Low Gas Pressure Switch

w/ Manual Reset

• Outdoor Reset Control

• Manual Reset Low Water Cut-Off

w/ test

• Stack Frame

• MP2 Sequencer

Available Firing Systems

M9 Hot Surface Ignition with
Electronic Supervision (Standard)
M13 GE GAP/FM/CSD1
M7 California Code

Venting

• Outdoor Vent Cap

Registered under U.S. Patent # 5,989,020

For Ease In Ordering

By Model Number

CB N 0497 M9

NAT. GAS

MODEL

This boiler is a 495,000 Btu/hr,

natural gas Copper-Fin.
It has M9 firing controls

Btu/hr INPUT

FIRING

CONTROLS

Lochinvar Corporation • 300 Maddox Simpson Pkwy • Lebanon, TN 37090 • 615-889-8900 / Fax: [phone]

CBN-07 (Replaced CBN-06 3/10)

www.Lochinvar.com

FG-10M-5/11-Printed in U.S.A.