Reznor SCE 250 - User Manual

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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

C
Carly BenderAug 5, 2025
What to do if the Reznor SCE 250 Blower venter motor will not start?
- G
  gsmithAug 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.
E
Eric MartinezAug 9, 2025
Why is my Reznor Blower motor turning on and off?
- R
  robertwatsonAug 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.
L
Lindsey CrawfordAug 13, 2025
What to do if Reznor Blower pilot lights, but the main valve won't open?
- J
  jessica91Aug 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.
G
Glenda BrownAug 17, 2025
Why does the Reznor SCE 250 motor cut out on overload?
- C
  Caroline GravesAug 17, 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.
L
Lucas BryantAug 27, 2025
Why is my Reznor SCE 250 Blower not producing enough heat?
- M
  Mariah GonzalesAug 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.
A
Amanda WeissAug 31, 2025
What to do if the Reznor SCE 250 Blower motor will not run?
- T
  Tyler MillerAug 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.
G
Gregory GriffinNov 21, 2025
Why won't the pilot light on my Reznor Blower even with the venter operating?
- P
  Patrick NguyenNov 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

Important Safety Information

Hazardous Atmospheres Warning

Critical warnings about appliance use in hazardous atmospheres and airborne substances.

Installation

Unit Dimensions

Technical specifications and measurements for the unit based on model size.

Venting Options - Horizontal Kit

Horizontal Vent Terminal;Combustion Air Package Kit (Option CC6)

Installation components and instructions for the horizontal vent terminal and combustion air kit.

Venting Options - Vertical Kit

Vertical Vent Terminal;Combustion Air Package Kit (Option CC2)

Installation components and instructions for the vertical vent terminal and combustion air kit.

Installation and Startup Checklists

Pre-Startup Checklist

Verification steps before powering up the unit, covering installation and electrical checks.

Startup Checklist

Startup Sequence Verification

Confirmation of correct furnace operation sequence, including venter, pilot, and blower.

Reznor SCE 250 Specifications

General

Model	SCE 250
Weight	285 lbs
Heating Capacity	250, 000 BTU/h
Venting	Separated Combustion
Efficiency	80%

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