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MODEL: AVFL42NIP-BU, AVFL42PIP-BU, AVFL42NIP-RB,
AVFL42PIP-RB, AVFL48NIP, AVFL48PIP, AVFLST48NIP,
AVFLST48PIP, AVFL60NIP-B, AVFL60PIP-B
LABORATORY: UNDERWRITERS LABORATORIES, INC.
(UL)
TYPE: Unvented Room Heaters
STANDARD: ANSI Z21.11.2:19
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NOTICE: This installation must conform with local codes.
In the absence of local codes you must comply with the
National Fuel Gas Code, ANSI Z223.1-latest edition in
the U.S.A.
NOT INTENDED FOR USE AS A PRIMARY HEAT SOURCE.
This appliance is tested and approved as either supplemen-
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Models
$9)/1,3%8 1* (0-2000 FT)
$9)/3,3%8 3523$1( (0-2000 FT)
$9)/1,35% 1* (0-2000 FT)
$9)/3,35% 3523$1( (0-2000 FT)
$9)/1,3 1* (0-2000 FT)
$9)/3,3 3523$1( (0-2000 FT)
$9)/671,3 1* (0-2000 FT)
$9)/673,3 3523$1( (0-2000 FT)
$9)/1,3% 1* (0-2000 FT)
$9)/3,3% 3523$1( (0-2000 FT)
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GAS PRESSURES
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Inlet Maximum
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Setting
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4
Maximum
Minimum
Input
Input BTU/h
BTU/h
34,000 23,500  
33,000 
24,500 17,500
24,000 19,000   
39,000 27,500
38,000 31,000
39,000 27,500
38,000 31,000
40,000 28,000
39,000 30,500
NATURAL PROPANE (LP)
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Monessen • AVFL Series Installation Manual • 4099-901 Rev. E • 01/22
C. High Altitude Installations
NOTICE: If the heating value of the gas has been reduced,
these rules do not apply. Check with your local gas utility
or authorities having jurisdiction.
When installing above 2000 feet elevation: 5HGXFH LQSXW
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Check with your local gas utility to determine proper
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those consisting entirely of steel, iron, brick, tile, concrete,
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Materials that are reported as passing ASTM E 136,
Standard Test Method for Behavior of Materials in
a Vertical Tube Furnace at 750 ºC shall be considered
non-combustible materials.
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Materials made of or surfaced with wood, compressed pa-
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F. Electrical Codes
Size (DMS)
NOTICE: This appliance must be electrically wired
and grounded in accordance with local codes or, in the
 
absence of local codes, with National Electric Code
  
ANSI/NFPA 70-latest edition or the Canadian Electric
Code CSA C22.1.
 
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  tected with ground-fault circuit-interrupter protection,
in compliance with the applicable electrical codes,
 
when it is installed in locations such as in bathrooms
 
RU QHDU VLQNV
 
 
WARNING: This product and the
fuels used to operate this product (liquid
propane or natural gas), and the products
of combustion of such fuels, can expose
you to chemicals including benzene, which
is known to the State of California to cause
cancer and reproductive harm. For more
information go to: www.P65Warnings.
ca.gov.