Lennox LF25-175A, Commercial Gas Unit Heater, 175000 Btuh, Aluminized Steel Heat Exchanger, 1 Fan, 115VAC

Cat # : 18C45

Model/Part # : LF25-175A

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Brand
Lennox
Catalog Number
18C45
Model/Part Number
LF25-175A
Minimum Order Quantity
0.0
Base Unit of Measure
Unit(S)
Product Depth
42.5 IN
Product Height
35.25 IN
Product Width
29.5 IN
Product Voltage
115v 1ph 60 hz
Gross Weight
175 LB
Family
LF25
Heating Capacity
175, 000 Btuh
Efficiency
83.0 AFUE
Family
LF25
Product Voltage
115 VAC 1 Ph 60 Hz
Heating Capacity
175000 Btuh
Efficiency
83%
Product Depth
42.5 IN
Product Width
25 IN
Product Height
35.25 IN
Gross Weight
190 Lbs.
Type
Commercial Gas Unit Heater
CFM
2350 CFM
Heat Exchanger Type
Aluminized Steel

Product Overview

Lennox LF25-125-400 Commercial Gas Unit Heaters

Tubular Aluminized or Stainless Steel Heat Exchanger:

  • Tubular heat exchanger is constructed of aluminized or stainless steel for superior resistance to corrosion and oxidation
  • Curved design allows complete exposure of heating surfaces to supply air stream
  • Dimpled tubes for maximum heat transfer
  • Compact design reduces space requirements in unit cabinet
  • Heat exchanger has been laboratory life cycle tested

Inshot Burner Assembly:

  • Aluminized steel inshot burner provides efficient trouble free operation
  • Burner venturi mixes air and gas in correct proportion for proper combustion
  • Burner assembly is removable from the unit as a single component for ease of service

Single-Stage Gas Control Valve (LF25-125-200 models):

  • 24 volt redundant combination gas control valve
  • Combines manual shut off switch (On-Off), automatic electric valve (dual) and gas pressure regulation into a compact combination control

Two-Stage Gas Control Valve (LF25-250-400 models):

  • 24 volt redundant combination two-stage gas control valve
  • Combines manual shut off switch (On-Off), automatic electric valve (dual) and gas pressure regulation into a compact combination control

Combustion Air Inducer:

  • Prepurges heat exchanger
  • Safely vents combustion products
  • Operates only during heating cycle
  • Blower motor has ball bearings and is thermally protected
  • Combustion air inducer on LF25-125 through LF25-150 units may be rotated 90° to left or right of vertical to facilitate installation

Pressure Switch:

  • Pressure switch prevents unit operation in case of blocked flue outlet

Limit Control(s):

  • Factory installed and accurately located
  • Limit control has fixed temperature setting
  • Protects heating system from abnormal operating conditions

Flame Rollout Switch:

  • Automatic reset switch is factory installed on front of the burner box

Controls:

  • Combination Direct Spark Ignition/Fan Timer Control
  • Electronic direct spark ignition control provides positive and safe main burner ignition
  • Spark is intermittent and occurs only when required
  • Separate electronic flame sensor control assures safe and reliable operation
  • Should loss of flame occur, flame sensor controls will initiate 5 attempts at re-ignition before locking out unit operation
  • Control board contains all necessary controls and relays to operate unit
  • Includes: Fan timer control - fan on 30 seconds (fixed), fan off 150 seconds (fixed), terminal strip for thermostat connections, diagnostic LED for troubleshooting
  • Direct plug-in wiring harness
  • Transformer: 120V/24V transformer furnished as standard

Direct Drive Fan(s):

  • All models are equipped with efficient and quiet operating direct drive fan(s)
  • LF25-125 through LF25-200 models have a single fan
  • LF25-250 through LF25-400 models have two fans

Cabinet:

  • Constructed of pre-painted steel
  • Cabinet is ribbed for improved sound reduction
  • Fan orifice opening is punched for improved airflow and sound performance
  • Adjustable louvers are furnished on cabinet for control of air flow direction
  • Wiring junction box is conveniently located outside unit cabinet for easy field wiring connections