Dayton Gas Furnace Manual

The Dayton Gas Furnace is a high-efficiency heating system designed for residential and light commercial use. This manual covers safety guidelines, installation procedures, operation instructions, maintenance requirements, and troubleshooting for various Dayton gas furnace models. Below are key sections for proper setup, operation, and maintenance of your heating system.

1. Safety Information 2. Installation Requirements 3. Technical Specifications 4. Operating Instructions 5. Control Settings 6. Maintenance Procedures 7. Venting Requirements 8. Gas Supply Connection 9. Electrical Wiring 10. Troubleshooting Guide 11. Warranty Information

Safety Information

Critical safety warnings and precautions for proper furnace operation.

Warning	Description
Carbon Monoxide Hazard	Ensure proper ventilation and regular inspection of heat exchanger
Gas Leaks	Check all gas connections with soap solution; never use open flame
Fire Hazard	Keep combustible materials away from furnace and vent pipes
Electrical Safety	Disconnect power before servicing; proper grounding required
Burn Hazard	Allow furnace to cool before servicing; surfaces remain hot after operation

Installation Requirements

Proper installation guidelines for safe and efficient operation.

Location: Install in well-ventilated area with adequate clearance (minimum 18 inches from combustible materials).
Combustion Air: Ensure adequate fresh air supply for proper combustion.
Leveling: Place furnace on level surface to prevent stress on heat exchanger.
Ductwork: Connect to properly sized and sealed duct system.
Gas Line: Use approved black iron pipe with proper sizing for BTU input.

WARNING! Installation must comply with local codes and be performed by qualified technician.

Technical Specifications

Input Capacity: 40,000 - 120,000 BTU/H depending on model
Efficiency: 80% - 96% AFUE
Gas Type: Natural Gas or LP (conversion kit required)
Gas Pressure: Natural Gas: 3.5" WC, LP: 10" WC
Electrical: 120V, 60Hz, 15 Amp circuit
Blower Motor: Multi-speed, ECM or PSC type
Venting: Category I or IV depending on efficiency rating
Dimensions: Varies by model (typically 21"W x 48"H x 26"D)

Operating Instructions

Normal operation procedures and thermostat settings.

Power On: Ensure gas valve and electrical power are turned on.
Thermostat: Set to HEAT mode and desired temperature.
Startup: Furnace will initiate pre-purge, ignition sequence, and main burner operation.
Normal Operation: Blower will start after heat exchanger reaches temperature.
Shutdown: Thermostat satisfied - gas valve closes, blower continues for cool-down.

Note: Allow 5-minute time delay between cycles for system protection.

Control Settings

Furnace control board settings and diagnostic indicators.

Control Board: LED status lights for diagnostics, DIP switch settings for blower speeds, gas type selection.

Thermostat Connections: R (24V), W (Heat), G (Fan), C (Common), Y (Cooling). Blower Speeds: Adjust DIP switches for heating and cooling CFM requirements. Pressure Switch: Monitors venting operation. Flame Sensor: Detects burner ignition. Limit Switches: High temperature safety cut-off.

Maintenance Procedures

Regular maintenance schedule for optimal performance and safety.

Monthly: Check air filter; replace when dirty.
Seasonal: Inspect burners, heat exchanger, and venting system.
Annual: Professional inspection including gas pressure, combustion analysis, and safety controls.
Blower Maintenance: Clean blower wheel and housing annually.
Drain System: For condensing models, check condensate drain and trap.

Important: Only qualified technicians should perform internal maintenance.

Venting Requirements

Proper venting installation for safe combustion gas removal.

Standard Efficiency: Category I venting - B-vent or approved metal pipe
High Efficiency: Category IV venting - PVC or CPVC pipe
Vent Termination: Minimum 12 inches from grade, away from windows and air intakes
Combustion Air: Separate intake required for sealed combustion units
Clearances: Maintain 1-inch clearance to combustible materials

Gas Supply Connection

Gas line installation and pressure requirements.

Pipe Sizing: Consult local codes and BTU requirements for proper diameter.
Shut-off Valve: Install approved gas cock within 6 feet of furnace.
Sediment Trap: Install drip leg before gas connection.
Pressure Test: Test all connections with soap solution; check for leaks.
Manifold Pressure: Adjust gas valve to specified pressure for your model.

WARNING! Gas work must be performed by licensed professional.

Electrical Wiring

Electrical connections and circuit requirements.

Connection	Requirement
Power Supply	120V, 60Hz, dedicated 15 Amp circuit
Grounding	Proper equipment grounding required
Thermostat	18 gauge minimum, 5-conductor recommended
Disconnect	Install service switch within sight of furnace
Blower Motor	Follow wiring diagram for proper speed taps

Troubleshooting Guide

Common issues and diagnostic procedures.

Symptom	Possible Cause	Corrective Action
No heat	Power outage, thermostat setting, gas valve	Check power, thermostat, gas supply, and control board status lights
Furnace short cycles	Dirty filter, restricted airflow, high limit	Replace filter, check ductwork, verify proper airflow
Blower doesn't run	Motor capacitor, control board, wiring	Check capacitor, control signals, and motor windings
Burner won't ignite	Gas supply, igniter, pressure switch	Verify gas pressure, check hot surface igniter, test pressure switch
Unusual noises	Blower wheel, inducer motor, ductwork	Inspect for obstructions, loose components, or vibration

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

Warranty Information

Warranty coverage and registration details.

Standard warranty includes 20-year heat exchanger limited warranty, 5-year parts warranty, and 1-year labor warranty. Warranty registration required within 60 days of installation. Keep original sales receipt and installation date. For warranty service, contact authorized Dayton service provider. Proof of professional installation required for all warranty claims.

Customer Service: 1-888-DAYTON1; www.dayton.com