Lochinvar PBN0250 User Manual

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88% Thermal Efficiency
Compact Design
Multiple Venting Options
Category II Venting
Gas Fired Boilers
LOW
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.
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FT / HD
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0 5 10 15 20 25 30 35
40 45 50 55 60 65 70 75 80 85 90 95 100
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90
85
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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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