Day and Night Furnace Owners Manual

The Day and Night Furnace is a high-efficiency residential heating system designed for reliable performance and energy savings. This gas furnace features variable-speed blower technology, electronic ignition, multiple heat stages, smart thermostat compatibility, air filtration system, safety shut-off controls, and quiet operation. Rated for natural gas or propane with AFUE ratings up to 96%. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Heat exchanger, blower assembly, gas valve, ignition system, air filter, pressure switches, limit controls, venting system.

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

1. Location: Install in dry, well-ventilated area with proper clearances.
2. Gas connection: Use approved gas piping; pressure test required.
3. Electrical: 120V AC power supply with proper grounding.
4. Venting: Proper vent pipe installation per manufacturer specifications.
5. Ductwork: Ensure proper return and supply air duct connections.

WARNING! Gas appliances can be dangerous if improperly installed. Use licensed HVAC professional for installation.

First-Time Setup

After professional installation, complete initial startup procedure.

1. Verify all connections: Gas, electrical, venting, and ductwork.
2. Install air filter: Ensure proper size and orientation.
3. Set thermostat: Program desired temperature settings.
4. Initial startup: Follow lighting instructions; check for proper operation.
5. Test safety controls: Verify limit switches and pressure controls function.

CAUTION! Never attempt to adjust gas pressure or ignition settings yourself.

Technical Specifications

• Fuel Type: Natural gas or propane
• Input BTU: 40,000 - 120,000 (model dependent)
• AFUE Rating: Up to 96% efficiency
• Blower Motor: Variable-speed ECM
• Stages: Single-stage, two-stage, or modulating
• Electrical: 120V AC, 60Hz
• Venting: PVC or ABS plastic (direct vent)
• Filter Size: Standard 1-inch or 4-inch media
• Warranty: 20-year heat exchanger, 5-year parts
• Operating Temp Range: -30°F to 120°F ambient

Controls and Settings

Access control board via front panel. Thermostat controls temperature settings.

Control Board: Power switch, diagnostic LED, reset button, dip switches for configuration.

Thermostat Settings: Heat mode, fan control (auto/on), temperature setpoint, program schedules. Advanced Settings: Blower delay, fan speed adjustments, staging parameters (professional service only). Diagnostic Codes: LED flash patterns indicate specific error conditions for troubleshooting.

Connecting Thermostat

Compatible with most 24V thermostats. Standard wiring connections.

1. Turn off power at furnace and circuit breaker.
2. Remove old thermostat and note wire connections.
3. Connect wires to new thermostat: R (power), W (heat), G (fan), C (common).
4. Mount thermostat and restore power.
5. Test operation in heating mode.

Tip: For smart thermostats, consult thermostat manual for specific wiring instructions.

Operating Instructions

Normal heating operation controlled by thermostat.

1. Set thermostat to HEAT mode and desired temperature.
2. Furnace will ignite when room temperature drops below setpoint.
3. Blower will start after warm-up period (approximately 30-90 seconds).
4. Furnace cycles off when temperature reaches setpoint.
5. Blower continues briefly to distribute residual heat.
6. For continuous fan operation, set thermostat fan to ON position.

WARNING! If you smell gas, turn off furnace immediately and call professional service.

Safety Features

Flame rollout switch: Shuts off gas if flame detected outside burner. High limit switch: Turns off burners if overheating detected. Pressure switches: Ensure proper venting before ignition. Ignition safety: Prevents gas flow if no flame detected. Gas valve: Automatic shut-off in emergency situations.

Maintenance & Cleaning

Regular maintenance ensures efficiency and longevity.

1. Monthly: Check and replace air filter as needed.
2. Seasonal: Professional inspection before heating season.
3. Annual: Professional cleaning of burners, heat exchanger, and blower.
4. Visual inspection: Check vent pipes and drain lines for obstructions.

CAUTION! Always turn off power and gas before performing any maintenance.

Regulatory Information

ANSI Z21.47: Certified for safety standards. UL listed. Meets DOE energy efficiency requirements. CSA certified for Canada. Manufactured to comply with all applicable safety and performance standards. For technical support, visit www.dayandnightfurnace.com or contact 1-800-422-4328.

Troubleshooting

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

Service: 1-800-422-4328; www.dayandnightfurnace.com