Kenmore Power Miser 80 Furnace Manual

The Kenmore Power Miser 80 is a high-efficiency gas furnace with 80% AFUE rating, featuring electronic ignition, multi-speed blower motor, safety controls, and compatibility with standard thermostat systems. Designed for residential heating applications with natural gas or propane capability. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation Requirements 3. First-Time Setup 4. Technical Specifications 5. Controls and Operation 6. Venting and Combustion Air 7. Maintenance Procedures 8. Safety Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Heat exchanger, burners, inducer motor, blower assembly, gas valve, control board, limit switches, pressure switches.

Feature	Description
AFUE Rating	80% Annual Fuel Utilization Efficiency
Ignition System	Hot surface ignition
Blower Motor	Multi-speed PSC motor
Gas Type	Natural gas or propane (conversion kit required)
Safety Controls	Flame rollout switch, high limit switch, pressure switches
Venting	Category I venting with PVC or metal
Filter Size	Standard 16x25x1 inch filter
Control Board	Integrated furnace controller with LED status lights
Thermostat Connection	Standard 24VAC connections
Power Requirements	120V AC, 60Hz

Installation Requirements

Professional installation recommended. Ensure proper clearances and local code compliance.

Location: Install in dry, well-ventilated area with minimum clearances as specified.
Gas Connection: Use approved gas pipe and fittings; pressure test for leaks.
Electrical: Connect to dedicated 120V circuit with proper grounding.
Venting: Install according to manufacturer specifications and local codes.
Ductwork: Ensure proper sizing and sealing of supply and return ducts.

WARNING! Gas appliances can be dangerous if improperly installed. Use qualified HVAC technician for installation.

First-Time Setup

Initial startup must be performed by qualified technician.

Verify all connections: Gas, electrical, venting, and ductwork.
Check gas pressure: Adjust manifold pressure to specifications.
Test safety controls: Verify operation of all limit and safety switches.
Commission system: Start furnace and check for proper ignition sequence.
Measure temperatures: Verify temperature rise within specified range.
Set blower speeds: Adjust for proper airflow and temperature rise.

CAUTION! Never bypass safety controls. Ensure proper combustion air supply.

Technical Specifications

AFUE Rating: 80%
Input BTU/H: 60,000 - 120,000 (varies by model)
Output BTU/H: 48,000 - 96,000 (varies by model)
Gas Type: Natural gas or LP (with conversion)
Manifold Pressure: 3.5" WC natural gas, 10" WC propane
Electrical: 120V AC, 60Hz, 15 amp circuit
Blower Motor: Multi-speed PSC, 1/3 to 3/4 HP
Temperature Rise: 35-65°F
Venting: Category I, minimum 3" diameter
Filter Size: 16x25x1 inch (standard)

Controls and Operation

Integrated control board manages all furnace functions with LED status indicator.

Normal Operation Sequence:

Thermostat calls for heat
Inducer motor starts
Pressure switch proves draft
Hot surface igniter heats
Gas valve opens
Burners ignite
Blower starts after heat exchanger warms

Control Board LED Codes: Green = normal operation, Red = fault condition (blink codes indicate specific issues).

Venting and Combustion Air

Proper venting is critical for safe operation and efficiency.

Vent Material: Use approved PVC, CPVC, or metal vent pipe.
Vent Slope: Minimum 1/4 inch per foot toward furnace.
Termination: Locate vent terminal away from windows and air intakes.
Combustion Air: Ensure adequate fresh air supply for proper combustion.
Clearances: Maintain specified clearances to combustible materials.

Tip: Inspect vent system annually for blockages or deterioration.

Maintenance Procedures

Regular maintenance ensures efficiency and extends furnace life.

Monthly: Check and replace air filter if dirty.
Annual: Professional inspection and cleaning recommended.
Burner Inspection: Clean burners and check for proper flame pattern.
Heat Exchanger: Inspect for cracks or corrosion.
Blower Assembly: Clean blower wheel and housing.
Vent System: Check for obstructions and proper draft.
Electrical: Check all connections and component operation.

WARNING! Turn off power and gas supply before performing any maintenance.

Safety Features

Multiple safety systems protect against hazardous conditions.

Flame Rollout Switch: Detects flame outside burners
High Limit Switch: Prevents overheating
Pressure Switches: Verify proper venting
Ignition Control: Safety shutoff if no flame detected
Gas Valve: Automatic shutoff in fault conditions

Never bypass safety controls. Replace faulty safety devices immediately.

Care & Cleaning

Keep furnace area clean and unobstructed.

Exterior: Wipe with dry cloth only.
Air Filter: Replace every 1-3 months during heating season.
Vents: Keep supply and return vents unobstructed.
Combustion Area: Keep clear of dust, debris, and flammable materials.

CAUTION! Do not use water or cleaning chemicals on furnace components.

Regulatory Information

UL listed and ANSI certified. Complies with ANSI Z21.47/CSA 2.3 standards for gas-fired central furnaces. Manufactured to meet U.S. Department of Energy efficiency standards. For technical support, contact Kenmore customer service at 1-800-426-9225 or visit www.kenmore.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, door switch	Check circuit breaker, thermostat setting, door switch engagement
No heat	Gas supply, ignition, filter	Verify gas valve on, check igniter, replace dirty filter
Short cycling	Dirty filter, limit switch	Replace filter, check for blocked vents, verify limit switch operation
Blower runs continuously	Thermostat setting, control board	Check thermostat fan setting, inspect control board
Unusual noises	Blower, inducer, ductwork	Inspect blower wheel, inducer motor, check for loose panels
Pilot/ignition failure	Gas supply, igniter, flame sensor	Verify gas pressure, check igniter operation, clean flame sensor

Reset: Turn power off for 30 seconds, then restore power.

Service: 1-800-426-9225; www.kenmore.com