Lochinvar PFN0751PM User Manual

500,000 to 1, 300,000 Btu/hr

Less Than 30 ppm NOx

Up to 87% Thermal Efficiency

High Efficiency
Commercial Gas
Water Heaters

The High-Efficiency, High-Output
Compact Water Heater

The Power-Fin was first
introduced nearly two decades
ago in 1986. Using time tested
fan assisted technology,
Lochinvar has raised the bar
again, offering you new models
with even more installation
flexibility than before.

What's more, unit inputs range as high as 1,300,000
Btu/hr but require just 4.6 sq. ft. of floor space. Only
the Power-Fin-with its high efficiency output-can offer
such heavyweight performance in a water heater so
compact. Plus, with new venting capabilities, the
Power-Fin is even more flexible in installation. And it
is easy to see how the Power-Fin is performing thanks
to a new digital control panel.

Outstanding Thermal Efficiency

Power-Fin water heaters offer up to 87% thermal
efficiency and a NOx rating of less than 30 ppm by
way of fan-assisted sealed combustion. This means
that 87¢ out of every fuel dollar goes into heating the
water - dramatically reducing operating costs of the
water heater while ensuring clean combustion.

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 eliminates external heat losses,
which means that the fuel dollars are used to heat
the water, not the mechanical
room. It also ensures the jacket
stays cooler, providing greater
safety and requiring less
clearance from combustibles

- zero clearance on each side.

First Power-Fin production model - 1986

DirectAire Vertical
w/ Sidewall Inlet*

Vents vertically up to 50
equivalent feet, and directly
draws combustion air 50
equivalent feet from a side wall.

Vertical

Vents vertically
through the roof.

Sidewall*

Vents horizontally
up to 50 equivalent
feet, using
Category IV
approved vent
material.

Direct Vent
Horizontal*

Vents horizontally up to 50
equivalent feet, using Category IV
approved vent material. Directly
draws combustion air 50
equivalent feet from a side wall.

Direct Vent
Vertical

Vents vertically up to 50
equivalent feet, and
directly draws combustion
air 50 equivalent feet
from the roof top.

DirectAire Horizontal
w/ Rooftop Inlet*

Vents horizontally up to 50
equivalent feet, using Category IV
approved vent material. Directly
draws combustion air 50 equivalent
feet from the roof top.

Power-Fin Venting Options

These new models also feature a more flexible two pipe, independent air inlet and exhaust vent piping. When
equipped with On/Off firing controls the Power-Fin utilizes Category I, Type B vent material in most cases.
When equipped with modulating fire controls the heater utilizes Category IV, AL29-4C corrosion resistant,
sealed vent pipe. Factory supplied vent kits are required for some venting configurations - see below.

Modulating (M9) models require Category IV vent material in any venting configuration.
On/Off (F9) models require Category IV vent materials when exhausting through a sidewall.
Consult I&O manual for exact specifications.
*Requires factory supplied vent kits

Exhaust Vent Reducer

Available for installation with Category IV vent systems, the Vent Reducer kits
allow the vent diameter of eachPower-Fin model to be reduced by as much as 45%.
The vent reducer is made from AL29-4C corrosion resistant material. Because the
reduction in vent size creates a “positive” pressure, all reduced vent systems are
classified as Category IV systems requiring corrosion resistant, sealed vent pipe.

Reduced Vent Sizes

PFN0501 7” to 4”
PFN0751 9” to 5”
PFN1001 10” to 6”
PFN1300 12” to 8”