F Installation
F Installation


Reznor's F gas-fired, gravity-vented unit heaters are designed for ceiling suspension with a propeller fan for air delivery with 80% thermal efficiency. It may be used with natural or propane gas, as specified, in sizes from 25,000 to 400,000 BTUH gas input. These units are approved for installation in the United States and Canada by the Canadian Standards Association(CSA).



  • Model F units require the addition of spark pilot option AH2 or AH3.
  • Not certified for residential use.

Wärmeleistung ( MBH )

Luftvolumenstrom ( CFM )

Wurfweite ( Feet )

Wirkungsgrad bei Vollast ( Bruto )


  • Orifices for natural gas
  • Aluminized steel heat exchanger
  • Aluminized steel burner rack with stainless steel insert
  • Spark ignited pilot
  • Intermittent safety pilot with electronic flame supervision without timed lockout
  • Single-stage combination gas valve (field adjustable for high altitude operation)
  • 115/1/60 supply voltage
  • 115 volt fan motor with internal overload protection
  • Fan and limit safety controls
  • Energy cutoff (ECO) device
  • Blocked vent shutoff system
  • 24-volt control voltage transformer
  • Individually adjustable horizontal louvers
  • Full safety fan guard
  • Terminal strip connector for 24-volt field wiring
  • Convenient bottom burner access
  • 2-point 3/8"-16 threaded hanger connections
  • Horizontal/vertical vent outlet

Optional Features - Factory Installed:

  • Equipped for propane gas
  • Equipped for high altitude (2001-9000 ft)
  • E-3 (409) stainless steel heat exchanger and burner
  • Two-stage gas control (50% low fire) - sizes 75-400
  • Spark ignited, intermittent safety pilot with electronic flame supervision with or without timed lockout (timed lockout is required for propane gas)
  • Manual summer/winter switch
  • Burner air shutters
  • 220/240 volt/50 Hertz electrical operation
  • Totally enclosed 115V motor
  • Low ambient fan control relay

Optional Features - Field Installed:

  • Power venter
  • Vertical louvers
  • Downturn air nozzle, 25-65o or 50-90o variable air deflector range (includes 4-point suspension kit)
  • Thermostat and relay kits
  • Air recirculation kits
  • Manual summer/winter switch
  • Multiple heater control
  • 4-point suspension kit
  • Unit-mounted thermostat bracket
  • Step down transformer 230/115 or 460/115
  • Burner air shutters
  • Low ambient fan control relay kit
  • Hanger kit to suspend from 1" pipe (2 or 4 point suspension)
  • Single-stage and two-stage thermostats
  • Thermostat guard with locking cover
  • Manual shutoff valve and union
  • Gas conversion kit

1 Datei


Product overview brochure Reznor , English
Product overview brochure of Reznor in English
for Europe and export markets with 50 Hz utility frequency, but excluding UK and North-America, which have their own product range and product overview brochures.
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1.7 MB

Wartung / Installation
6 Dateien

Wartung / Installation

Unit Installation Manual - F & B
Installation manual for Models F & B
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1.5 MB
Parts Manuals - Replacement Ignition System and Gas Valves
Replacement ignition system and gas valves by serial number code and Maxitrol system components by serial number suffix
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1.3 MB
Conversion Info - Gas Conversion - Model F, B
Gas conversion kit and instructions for Models F & B
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308.1 kB
Field Service - Ignition Control Replacement - Various Models
Ignition control replacement kit for pilot code 62, 63, 65, 66, & 84 (found in first set of digitis of serial number)
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250.4 kB
Field Service - Replacement Relay Kit - PN 259521
Replacement relay kit for Reznor part number 259521 - applies to power vented units using Reznor part number 46233 or 259518 time delay relay
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646.2 kB
Conversion Info - Ignition Conversion Kit - Models F, B
Ignition conversion kits to convert older Model F & B heaters with standing pilot to spark-ignited, intermitten safety pilot with or without lockout
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418.8 kB