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88% Thermal Efficiency
Compact Design
Multiple Venting Options
Category II Venting
Gas Fired
Boilers
LOW
NO
X
LOWLOW
NONO
X
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The High-Efficiency,
High-Output Compact Boiler
The Power-Fin’ s unique approach to boiler design means
benefits everyone will enjoy . For the installer, it means
lighter weight and easier servicing. And end-users
everywhere will appreciate the significant energy savings
and fast, accurate response to the call for heat.
What’s more, unit capacities range as high as1,000,000
Btu/hr but require just 5.75 sq. ft. of floor space. Only the
Power-Fin—with its high efficiency output—can offer
such heavyweight performance in a boiler so compact.
Here’s how.
Unique Circular Copper-Fin®Heat Exchanger
At the heart of this unit is our circular Power-Fin heat
exchanger. Using a special process, the outer wall of the
copper tube is precision extruded to form exactly 7 fins per
inch. The result is an
integrated
design with a
heat transfer
ratio that is 9
times greater
than ordinary copper
tubing.
T o create the combustion
chamber, these highly
efficient copper tubes are
secured by two high-grade
cast iron headers in
a circular pattern—
completely surrounding the
flame. This not only
ensures optimum
efficiency, it also
eliminates the need for
a bulky refractory lining.
Finally , the entire assembly is hydrostatically-tested, ASME
stamped and approved for 160 psi working pressure.
The Advantages Of Sealed Combustion
Another feature contributing to the remarkable efficiency
of the Power-Fin boiler is its unique combination of a sealed
chamber and fan-assisted combustion. This design allows the
amount of intake air to be precisely metered to match gas
input for better, cleaner and more complete combustion. And
the unique burner design projects flames in a full 360° pattern.
The combustion air fan serves a dual function by
providing the exact volume of combustion air as well
as inducing a continuous flow of cooling air around the
combustion chamber. Pre-pur ge and post-purge cycles
provide added protection, while a pressurized, sealed
chamber prevents spillage of gas and combustion
by-products.
Diagnostic Systems And Controls
T o ensure fail-safe operation, every major function ofthe
Power-Fin is automatically controlled and checked by a
convenient plug-in control panel with advanced diagnostic
features. A series of relays, warning lights and proving
switches continually monitor each phase of the system’s
operation.
These not only warn against boiler failure, they actually
help pinpoint the source of any problems—from
combustion air or low gas pressure, to water temperature or
water flow .
We also designed the Power-Fin with our own fuel-saving
Hot Surface Ignition. And a convenient built-in temperature
resistant glass viewing port allows for visual checks of
ignition and burner operation.
Compact, Accessible Design
The Power-Fin gives you the best of both worlds:
high efficiency and a compact design. In fact, our one
million Btu/hr system requires just 5.75 square feet of floor
space—making it a designer’s dream. Plus, its high
efficiency and unique circular heat exchanger eliminates the
need for a bulky refractory lining. So at just over 700
pounds, it’s an installers’ dream too.
For added flexibility , the Power -Fin is approved for zero
clearance installations and offers five convenient venting
options from which to choose. Both vertical and horizontal
direct-vent sealed combustion configurations are available,
as well as venting for outdoor applications.
The Power-Fin is designed for faster servicing, too. The
bolted header inspection cover on all models can be easily
removed for field inspection of tube interiors. And the entire
heat exchanger can be removed through the front of the
boiler.
by Lochinvar
®
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Venting Options
Through-Wall Vent:
Provides a quick and easy
means of installation when
no vent stack is readily
available.
Direct Vent/Sealed
Combustion:
Combustion air is drawn
into the heater from
out-of-doors, then exhaust
is vented back out through
the same wall. Especially
good for contaminated
indoor air situations.
Vertical Vent/Sealed
Combustion:
Provides the advantages of
direct venting in a vertical
configuration.
Outdoor:
An all-weather system for
even the most rugged
outdoor applications. Use
when space is not available
or when outdoor location
provides better access to hot
water point-of-use.
Modular Flexibility
With input capacities from 250,000 to1,000,000, Btu/hr
there’s a Power -Fin boiler to meet every need. And our
exclusive Mod-U-Pak
TM
sequencer gives you the flexibility
to create larger systems. As demand increases, additional
units can easily be added for greater flexibility .
A single sequencing controller monitors and provides
stage-firing for up to eight separate boilers. Multiple devices
can even be combined to control more units—for virtually
unlimited capacity . This makes it possible to meet peak
demands, while also reducing system wear and achieving
maximum energy savings during off-peak periods.
Power-Fin Performance
What’s more, the Power -Fin operates condensate-free
with boiler water temperatures as low as 150°F or, when
combined with a simple external piping by-pass
arrangement, at system temperatures as low as 80°F with no
damage to the boiler.
With it’s instantaneous response and high heat transfer
ratio, the Power-Fin is ideal for water source heat pump
systems. In fact—thanks to a small footprint, 88% thermal
efficiency, and greater installation options—the Power -Fin
is perfect for almost every application. And it’s only
available from Lochinvar.
Boiler Temperature Rise Chart
Pressure Drop Chart
Boiler Output Boiler Output Btu Fuel
Btu/hr @ 75% @ 88% Savings Year One Savings
Model Rated Thermal Thermal per Hour Fuel Over 5
Number Input Efficiency Efficiency of Operation Savings Years
PBNO250 250,000 187,500 220,000 32,500 $320 $1,599
PBNO500 500,000 375,000 440,000 65,000 640 3,198
PBNO750 750,000 562,500 660,000 97,500 959 4,797
PBN1000 1,000,000 750,000 880,000 130,000 1,279 6,396
Fuel savings calculated a $0.66 per therm.
Based on 1500 hours of operation per year.
Conventional Vent:
Power-Fin may be vented
into a conventional flue
or vent breaching if it
is convenient and
cost-effective. Requires
Category II venting.
3
18
17
16
15
14
13
12
11
10
9
FT / HD
8
7
6
5
4
3
2
1
0
0 5 10 15 20 25 30 35
40 45 50 55 60 65 70 75 80 85 90 95 100
95
90
85
80
75
70
65
60
55
50
45
40
35
T TEMPERATURE RISE
30
25
20
15
10
5
0
0 5 10 15 20 25 30 35
1000
750
500
250
40 45 50 55 60 65 70 75 80 85 90 95 100
GPM
1,000,000 BTU/HR
250,000 BTU/HR
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Power-Fin®Boilers Dimensions & Specifications
Lochinvar Corporation • 300 Maddox Simpson Pkwy • Lebanon, TN 37090 • 615-889-8900 / Fax: 615-547-1000
www.Lochinvar.com
PBN-02
5M-2/04-Printed In U.S.A.
FOR EASE IN ORDERING
BY MODEL NUMBER
PB N 0250 F9
This is a 250,000 Btu/hr
natural gas Power-Fin boiler
with F9 firing controls.
Firing Controls
Natural Gas
Model
MBH Input
23"
36"
TOP VIEW
VIEWING PORT
FRONT
G
BACK VIEW
VENT DIA.
INLET
DIA.
OUTLET
11 1/2"
6"
A
E
GAS
CONN.
ELEC.
CONN.
D
F
INLET
Model Btu/hr Btu/hr A D E F G Gas Air Inlet Shipping
Number Input Output Conn. Size Weight
PBN0250 250,000 220,000 34" 16-1/4" 20-1/4" 5" 28-1/4" 3/4" 8" 460
PBN0500 500,000 440,000 41-1/2" 24-1/4" 26-1/2" 5" 35-1/2" 1" 10" 520
PBN0750 750,000 660,000 52-1/2" 33-1/4" 25-1/2" 6-1/2" 40-1/4" 1-1/4" 12" 615
PBN1000 1,000,000 880,000 60-1/2" 41-1/4" 28-1/2" 8-1/2" 47-1/2" 1-1/2" 14" 650
Notes: Change ‘N’ to ‘L’ to denote L.P. models. All water connections are 2”.
U.S. and Foreign patent numbers 3650248 and 4723513
Performance data based on manufacturer test results.
VENT DIAMETER
Conventional† Through Wall* Direct Vent**
5" 4" 4"
7" 6" 6"
9" 8" 8"
10" 10" 10'
† Requires Category II venting material.
* Requires factory supplied venting material.
** Requires factory supplied venting material and concentric
combustion air intake piping (Inlet diameter).
Standard Features
• 88% Thermal Efficiency
• Aquastat with Adjustable Differential
• Sequential & Diagnostic Control Panel
• Radial Stainless Steel Burner
• Low NOx Operation Exceeds the most
Stringent Air Quality Requirements
• ASME Copper Finned Tube Heat Exchanger
• 160 PSI Working Pressure
• Glass-Lined Water Surfaces
• Two Water Temperature Gauges (inlet/outlet)
• Redundant Gas Valves
• Main Gas Pressure Regulator
• Low Gas Pressure Switch
• High & Low Air Pressure Switches
• Hot Surface Ignition
• Adjustable High Limit with Manual Reset
• Down Stream Test Cock
• Zero Clearance to Combustible Materials
• ASME Pressure Relief Valve
• Flow Switch
• Small Footprint
• 24 Volt Control System
• Barometric Damper
• 10 Year Limited Warranty on Heat Exchanger
Available Firing Systems
F9 Hot Surface Ignition with
Electronic Supervision (Standard)
F13 Factory Mutual (FM)
F14 Industrial Risk Insurers (IRI)
(PB 0500 - 1000)
F7 California Code
Optional Equipment
• Alarm Bell
• Contacts for Air Louvers
• Contacts on any Failure
• Cupro-Nickel Heat Exchanger
• High or Low Gas Pressure Switch
• Indoor/Outdoor Control
• Low Water Cut-Off
• Pump Relay
• Solenoid Gas Valve
• Time Clock
Mod-U-Pak Sequencer
• 2-6 Stage
• 7-10 Stage
• Indoor/Outdoor Reset
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