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Reznor SCE 350 - User Manual

Reznor SCE 350
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Revision: I-SCE (09-18) PN207697R9
SEPARATED-COMBUSTION,
PACKAGED FURNACE/BLOWER,
MODEL SCE
INSTALLATION/OPERATION/MAINTENANCE
 ⚠ WARNING ⚠ 
FIRE OR EXPLOSION HAZARD
• Failure to follow safety warnings exactly could result in serious injury, death, or
property damage.
• Be sure to read and understand the installation, operation, and service instructions
in this manual.
• Improper installation, adjustment, alteration, service, or maintenance can cause serious
injury, death, or property damage.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of
this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Leave the building immediately.
• Immediately call your gas supplier from a phone remote from the building. Follow the
gas suppliers instructions.
• If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service agency, or
the gas supplier.
DO NOT DESTROY. PLEASE READ CAREFULLY. KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
Supersedes: I-SCE (5-15) PN207697Rev8
TABLE OF CONTENTS
IMPORTANT SAFETY INFORMATION .................................................................. 2
GENERAL INFORMATION ............................................................................ 3
Installation Codes ................................................................................. 3
Special Installations (Aircraft Hangars/Garages) .......................................................... 3
Warranty ........................................................................................ 4
INSTALLATION ..................................................................................... 4
Dimensions ...................................................................................... 4
Uncrating/Unpacking ............................................................................... 5
Clearances ....................................................................................... 6
Location ......................................................................................... 6
Weights ......................................................................................... 6
Suspension ...................................................................................... 6
Mounting ........................................................................................ 7

Table of Contents

Questions and Answers

  • S
    Susan BridgesAug 5, 2025
    What to do if the Reznor Blower venter motor will not start?
    • K
      Kevin WhiteAug 5, 2025
      If the venter motor on your Reznor Blower isn't starting, here are a few things you can check: * First, make sure the power to the furnace is on and check the supply fuses or circuit breaker. * Next, verify that there is 24-volt power to the venter relay. Turn up the thermostat and check the control transformer output. Also, check for any loose or improper wire connections. * If power is available and the connections are good, the venter relay, motor, or capacitor might be defective and need replacement.
  • M
    Michelle WilliamsAug 9, 2025
    Why is my Reznor SCE 350 motor turning on and off?
    • B
      bobby12Aug 9, 2025
      If your Reznor Blower motor is turning on and off, it could be due to the motor overload device cycling. Verify the motor load against the motor rating plate. If necessary, replace the motor or overload device. Also, if you have a 3-phase motor, ensure it is rotating in the correct direction by interchanging two legs of the supply connections.
  • H
    heather66Aug 13, 2025
    What to do if Reznor SCE 350 Blower pilot lights, but the main valve won't open?
    • S
      Samantha ClarkAug 13, 2025
      If the pilot light is on but the main valve of your Reznor Blower won't open, try the following: * Ensure the manual valve is open. * Check for defective valve. If 24-volt power is measured at the valve connections and valve remains closed, replace the valve. * Inspect and tighten all wiring connections. * Make sure the flame sensor lead is not grounded and that the insulation or ceramic is not cracked; replace as required. * If all checks indicate no other cause, replace the ignition controller.
  • L
    Lucas MurrayAug 18, 2025
    Why does the Reznor SCE 350 Blower motor cut out on overload?
    • S
      Shaun SantosAug 18, 2025
      If the motor on your Reznor Blower cuts out on overload, it could be due to a few reasons: * The motor pulley may not be properly adjusted. * There might be improper static pressure on the duct system, so adjust the dampers. * Also, check the power supply for low voltage.
  • S
    Steven HansenAug 27, 2025
    Why is my Reznor SCE 350 Blower not producing enough heat?
    • J
      James BrewerAug 27, 2025
      If your Reznor Blower isn't providing sufficient heat, consider the following: * Dirty filters in the blower system can restrict airflow, so clean or replace them. * Limit control cycling can also affect heating performance, so check the air throughput. * Ensure that wiring connections are in accordance with the wiring diagram. * The fan control could be defective and require replacement. * If the blower is set for too low a temperature rise, decrease the blower speed or increase static pressure.
  • W
    Walter McmahonAug 31, 2025
    What to do if the Reznor SCE 350 motor will not run?
    • D
      Danielle FinleyAug 31, 2025
      If the motor in your Reznor Blower isn't running, check the following: * Inspect the wiring and connections for any open circuits. * Replace the fan control if it's inoperative. * Ensure that wiring connections are in accordance with the wiring diagram. * Replace the contactor if it is inoperative. * If none of the above steps work, the motor may be defective and require replacement.
  • B
    Benjamin BarrNov 21, 2025
    Why won't the pilot light on my Reznor SCE 350 even with the venter operating?
    • A
      Amy HudsonNov 21, 2025
      If the pilot light on your Reznor Blower won't light even when the venter is operating, consider these potential causes: * Ensure the manual valve is open. * Bleed the gas line to remove any air. * Clean the pilot orifice with compressed air or solvent to remove any dirt. * Check for kinked pilot tubing and replace if necessary. * If 24-volt power is available at the pilot valve and it doesn't open, replace the valve. * Make sure all wire connections are solid. * Ensure that 24-volt power is available by checking for transformer failure. * Maintain the spark gap at 0.100 inch. * Replace the spark cable if it's shorted to ground. * Replace the pilot if the ceramic spark electrode is cracked or grounded. * Ensure all panels are in place and tightly secured to prevent d...

Summary

Fire and Explosion Hazard Warning

Important Safety Information

Installation Procedures

Location, Weights, and Suspension

Mounting Supports

Details on securing the unit using appropriate mounting supports.

Duct Connections and Requirements

Venting and Combustion Air System

Venting Options

Horizontal Venting (Option CC6)

Installation and parts for the horizontal vent terminal and combustion air package.

Vertical Venting (Option CC2)

Installation and parts for the vertical vent terminal and combustion air package.

Gas Piping and Pressures

Electrical Supply and Connections

Control Components

Operating Gas Valve

Optional Electronic Modulation

Pilot, Ignition, and Burner Systems

Pilot, Ignition, and Burner Specifications

Installation and Startup Checklists

Pre-Startup, Startup, and Post-Startup Procedures

Comprehensive checklists for pre-startup, startup, and post-startup verification.

Service and Maintenance

Gas Valve, Vent;Air, and Burner Rack Maintenance

Cleaning Pilot and Burners

Spark Ignition System Maintenance

Component Maintenance and Troubleshooting

Heat Exchanger, Venter Motor, Air Circulation, Limit Control, and Troubleshooting

Reznor SCE 350 Specifications

General IconGeneral
BrandReznor
ModelSCE 350
CategoryBlower
LanguageEnglish

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