The Keeprite Furnace is a high-efficiency residential heating system designed for reliable performance and energy savings. This manual covers gas-fired forced air furnaces with AFUE ratings up to 96%, featuring variable-speed blower motors, electronic ignition systems, multi-speed operation, and compatibility with various thermostat systems. Below are essential sections for safety, installation procedures, startup, operation, maintenance, and troubleshooting.
Critical safety information for proper furnace installation and operation.
| Hazard | Precaution |
|---|---|
| Gas Leaks | Check all connections with leak detection solution; never use open flame |
| Carbon Monoxide | Ensure proper venting; install CO detectors in living areas |
| Electrical Shock | Disconnect power before servicing; follow local electrical codes |
| Fire Hazard | Maintain clearance from combustibles; install smoke detectors |
| Burn Risk | Allow furnace to cool before handling components |
| Venting Obstruction | Keep intake and exhaust clear of debris and snow |
Essential preparations before beginning furnace installation.
WARNING! Installation must be performed by qualified HVAC technician only.
Step-by-step furnace installation process.
CAUTION! Furnace is heavy; use proper lifting equipment and techniques.
Wiring requirements and connections for proper furnace operation.
Natural gas or propane connection procedures and requirements.
Tip: Always use leak detection solution; never rely on smell alone.
Combustion air intake and flue gas exhaust installation.
Direct Vent Systems: Use approved PVC piping for intake and exhaust.
Clearances: Maintain 12" from combustion air inlet to exhaust outlet.
Slope: Pitch horizontal runs 1/4" per foot toward furnace.
Terminations: Locate away from windows, doors, and air intakes.
Sealing: Use approved PVC cement on all joints.
Initial system startup and performance verification.
WARNING! Never bypass safety controls during startup.
Proper furnace operation and user controls.
Thermostat Settings: Program for energy efficiency and comfort.
Filter Maintenance: Replace filters every 1-3 months depending on usage.
Blower Operation: Variable-speed motor adjusts airflow for optimal performance.
Ignition System: Electronic hot surface ignition for reliable starts.
Safety Controls: Rollout switches, pressure switches, and high-limit protection.
Routine maintenance requirements for optimal furnace performance.
| Maintenance Task | Frequency | Procedure |
|---|---|---|
| Air Filter Replacement | 1-3 months | Install clean filter in proper direction |
| Blower Cleaning | Annually | Vacuum blower assembly and motor |
| Heat Exchanger Inspection | Annually | Check for cracks or corrosion |
| Vent System Inspection | Annually | Verify clear and secure connections |
| Burner Cleaning | Annually | Clean burners and inspect flame pattern |
| Safety Control Test | Annually | Verify proper operation of all safety devices |
Common furnace problems and solutions.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Furnace won't start | Power loss, thermostat issue | Check circuit breaker, thermostat settings, door switch |
| No heat | Gas supply, ignition failure | Verify gas valve open, check for spark/flame |
| Short cycling | Dirty filter, airflow restriction | Replace filter, check vents and registers |
| Blower runs continuously | Thermostat fan setting | Check thermostat fan setting (auto/on) |
| Unusual noises | Loose components, airflow | Tighten access panels, check blower wheel |
| Error codes flashing | System fault detected | Refer to diagnostic chart in control panel |
Reset: Power cycle furnace to clear temporary faults.