Lochinvar COPPER-FIN CBN1257 User manual

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.
Unique Copper-Fin Heat Exchanger
The Lochinvar Copper-Fin boiler design uses a two
pass heat exchanger. Water is circulated through
a row of highly-efficient, finned copper tubes.
The high rate of water flow creates a
scouring action that prevents sediment
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 - 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
NOxemissions requirements. An independent
certification laboratory test gave us a rating of
less than 20 ppm - corrected to 3% O2. And less
NOxmeans a cleaner environment.
Energy Efficient, Cost Effective Boilers
Copper-Fin®
Commercial Gas
Boilers
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
AVINGS*
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®Boiler Dimensions & Specifications
CBN-07 (Replaced CBN-06 3/10) FG-10M-5/11-Printed in U.S.A.
Lochinvar Corporation • 300 Maddox Simpson Pkwy • Lebanon, TN 37090 • 615-889-8900 / Fax: [phone]
www.Lochinvar.com
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
•MP2Sequencer
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
MODEL
Btu/hr INPUT
This boiler is a 495,000 Btu/hr,
natural gas Copper-Fin.
It has M9 firing controls
NAT. GAS
FIRING
CONTROLS
Copper-Fin Heating Boiler Dimensions & Specifications
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.