Lochinvar’s Copper-Fin
II line of high efficiency
commercial gas boilers
gives you all the advantages
of copper finned tube heat
exchanger technology
plus the benefits of a
sealed combustion system.
Every Copper-Fin II model
offers four major advantages:
higher efficiency, smaller
footprint, smaller vent
diameters and multiple
venting options. Our
Copper-Fin II models
offer dollar - stretching
proportional firing that
provides a measured
response to the demand for
heat — as much or as little
as needed.
Outstanding Thermal Efficiency
Copper-Fin II boilers offer a remarkably high 85% thermal
efficiency. This means that 85¢ out of every fuel dollar goes
into heating the water, dramatically reducing the operating
cost of the equipment. Copper-Fin II achieves this efficiency
through the combination of an advanced fan
assisted combustion system and exclusive
gasketless copper fin tube heat
exchanger. A time tested and
proven combination.
The heat energy from the
combustion process is transferred
to the water as it passes through
the solid copper finned tube heat exchanger. The sealed
combustion design of the Copper-Fin II eliminates external
heat losses, this means that the energy dollars heat the water,
not the mechanical room. It also ensures that the jacket stays
cooler, providing greater safety and requiring less clearance
from combustible walls - just 1” in most cases.
Proportional Firing: Greater Savings, More
Accurate Temperatures
The Copper-Fin II’s proportional firing lowers your energy
costs and delivers more consistent water temperatures.
Multiple gas valves supply gas to the burners in stages,
and multiple speed blowers maintain the proper airflow to
ensure the most efficient combustion at each level of use.
Our built-in sequencer controls each of these functions. With
digital accuracy, the built-in sequencer carefully monitors
the need for heat, and as demand increases or decreases, it
automatically adjusts the blower output and gas valve input.
As the demand is met, the boiler decreases output gradually,
turning off gas valves and reducing combustion air in direct
proportion. This allows the Copper-Fin II to maintain a
constant setting. In fact, it’s accurate to within
1° Fahrenheit — a remarkable achievement for
units of this capacity. And the proportional firing
system features component redundancy, greatly
reducing the chance for total system shutdown.
Compact Design - For Installation Ease
The Copper-Fin II is compact enough to fit
through standard 36” doorways with ease. Even
our 2 million Btu/hr model is only 33-1/2” wide.
This space-saving design frees up more space in
the mechanical room. And our optional Stack Frame
lets you put two units in the footprint of just one.
Meets The Toughest Air
Quality Standards
Because of our unique fan-assisted
combustion process, the Copper-Fin II
exceeds today’s toughest NOx emissions
requirements. An independent certification
laboratory test gave us a rating of less than
30 ppm — corrected to 3% O2. And less
NOx means a cleaner environment.
Control at Your Fingertips
The enhanced operator interface panel provides fingertip
control of the builtin multi-stage digital
temperature controller.
Its refined user friendly
design simplifies service
while providing additional
diagnostic information with
fewer mechanical parts.
Making Installation Easier... For Less
High-efficiency, fan-assisted combustion means you can
use a smaller diameter vent stack — up to 8” smaller than
typically required. This makes installation less expensive
and less time-consuming.
Vent Cost Savings
Btu/hr ATMOSPHERIC COPPER-FIN II
INPUT VENT SIZE VENT SIZE $ S
*Comparison based on 25´ vent system using Type “B” double wall vent material,
storm collar and vent cap.
AVINGS*
Page 3
Our Enhanced Models Raise The Bar...Again
Our enhanced Copper-Fin II models offer the same reliable,
efficient operation and feature a more service friendly design.
The gas inlet and shutoff cocks, electrical and BMS connections
have been repositioned toward the front of the unit for easier
service access and simpler installation. And the new referenced
gas valve design improves operational performance by
monitoring the pressure in the sealed combustion chamber to
maintain the optimum air/fuel mixture.
All models feature alternate air
inlet connections for greater
installation flexibility. This field
convertible option provides the
ability to connect the air inlet on
either the right side or the rear
of the unit. 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.
You’ll also save installation time and expense with Lochinvar’s
direct vent option, featuring our innovative Aire-Lock™
combustion system. The direct vent option allows the installer
to vent the by-products of combustion directly through a side
wall without the use of an auxiliary draft inducer. By using
approved vent material and an air intake pipe, this option
effectively “detaches” the unit from the mechanical room by
pulling all combustion air from outside the building and venting
all combustion by-products outside through a side wall. A
feature that can really simplify an installation while reducing
overall installed costs.
Referenced gas valves
and shutoff cocks are
in the upper deck for
easier access. And our
Lochinvar exclusive
“Aire-Lock” transition
ducts provide a
positive path for the
sealed combustion
system that does not
require the upper
chamber panel to be
installed allowing for
accurate adjustment
during operation.
All BMS
connections
are on the front
portion of the
unit and have
been designed for
easier access and
connection.
Venting Options
Conventional
Vents into conventional
flue or vent breaching
using Type B double wall
vent.
Aire-Lock Direct Vent
Utilizes sealed Aire-Lock combustion
system to draw fresh air 50 equivalent feet
from a sidewall. Vents horizontally up to
50 equivalent feet through the sidewall
using Category IV approved vent material.
Powered Sidewall
Vents directly through the
outside wall using an optional
powered sidewall cap. Ideal
when a vent stack is not
practical.
Outdoor
Requires optional outdoor
vent cap. Use when indoor
space is a problem or if
outdoor location gives
better access.
Power DirectAire Horizontal
Draws fresh air from outside
and vents through sidewall
using optional powered
sidewall cap.
Sidewall (CH 401-751)
Draws fresh air from inside the room.
Vents
up to 50 equivalent feet
through the outside wall
IV approved vent material.
require a powered sidewall cap.
directly
using Category
Does not
DirectAire Vertical
with Sidewall Inlet
Draws fresh air from
outside and vents
through conventional
vertical flue.
DirectAire Vertical
Draws fresh air from
outside and vents
through conventional
vertical flue.
Page 4
Copper-Fin II® Boiler Dimensions & Specifications
Copper-Fin II Heating Boiler Dimensions & Spec i fi ca tions
Net
Model Input Thermal Output I=B=R Vent Air Gas Shipping
Number MBH Efficiency MBH MBH A B C D E F G H J K L Size Inlet Conn Weight
Notes: Change ‘N’ to ‘L’ for LP gas models. No deration on LP models Water connections for models CH 401-751 are 2” NPT on 6-1/2” centers.
Header increases “B” dimension 3-1/2” for models CH 401-751 and 6-1/4” for models CH 0991-2071
Performance data is based on manufacturer test results.
Standard Features
• 85% Thermal Efficiency
• ASME Copper Finned Tube Heat Exchanger
• Gasketless Heat Exchanger Design
• Proportional Firing
• Built-In Sequencer with up
to 4 stages of operation
• Adjustable High Limit w/ Manual Reset
• Built-in System Redundancy
• 24 Volt Control System
• Temperature & Pressure Gauge
• BMS Terminal Strip
• Down Stream Test Valves
• 10 Year Limited Warranty
on Heat Exchanger
(See warranty for details)
• Digital Operator Interface Panel
• Sealed Combustion Chamber
• Stainless Steel Burners
• Low NOx Operation Exceeds the
most Stringent Air Quality Requirements
• 160 PSI Working Pressure
• Loch-Heat Ceramic Tile
Combustion Chamber
• Hot Surface Ignition
• ASME Pressure Relief Valve
• Referenced Gas Valves
• Flow Switch
• PID Temperature Control
• Combustion Air Filter
• Freeze Protection
• Field Convertible Air Inlet Connection
• Pump Relay w/ Delay
Optional Equipment
• Alarm Bell
• Contacts for Air Louvers
• Contacts on any Failure
• Cupro-Nickel Heat Exchanger
• High Gas Pressure Switch
w/ Manual Reset
• High & Low Gas Pressure Switch
w/ Manual Reset
• Indoor/Outdoor Reset
• Manual Reset Low Water Cut-Off
w/test
• MP2 Sequencer
• Stack Frame
• Combustible Floor Shield (CH 401-751)
Water connections for models CH 0991-2071 are 2-1/2” NPT on 11-1/4” centers.
Venting Options
• Aire-LockTM Direct Vent Sealed Combustion
• DirectAire® Vertical
• DirectAire® Vertical w/ Sidewall Inlet
• Outdoor Installation
• Power DirectAire® Horizontal
• Powered Side Wall
• Sidewall (CH 401-751)
Firing Controls
M9 Hot Surface Ignition with Electronic
Supervision (Standard)
M13 GE GAP/FM/CSD1 (CH 501-2017)
M7 California Code