Ducane Furnace CMPE Manual

The Ducane CMPE series is a high-efficiency gas furnace designed for residential heating applications. This furnace features advanced combustion technology, variable-speed blower motors, durable heat exchangers, and comprehensive safety controls. Below are key sections covering safety guidelines, technical specifications, installation procedures, operation instructions, maintenance requirements, and troubleshooting.

Features at a Glance

Key components: Stainless steel heat exchanger, variable-speed ECM blower motor, electronic ignition system, multi-speed inducer motor, integrated control board.

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

1. Location: Install in dry, clean area with adequate clearance for service access.
2. Venting: Use approved PVC or CPVC materials for intake and exhaust.
3. Gas Supply: Connect to proper gas line with approved shutoff valve.
4. Electrical: Connect to 120V AC power with proper grounding.
5. Ductwork: Ensure proper sizing and sealing for optimal airflow.

WARNING! Gas appliances can be hazardous; installation must be performed by qualified technician. Ensure proper combustion air and ventilation.

First-Time Setup

Initial startup must be performed by qualified technician.

1. Verify all connections: Gas, electrical, venting, and condensate drain.
2. Check gas pressure: Adjust manifold pressure to specifications.
3. Test safety controls: Verify operation of all limit switches and pressure sensors.
4. Program thermostat: Set up heating cycles and temperature settings.
5. Commission system: Run through complete heating cycle and verify operation.

CAUTION! Never bypass safety controls. Ensure proper ventilation before operation.

Technical Specifications

• Model Series: CMPE (Various sizes: 40,000-120,000 BTU)
• Efficiency: Up to 96% AFUE
• Gas Type: Natural Gas or LP (with conversion kit)
• Electrical: 120V AC, 60Hz
• Blower Speeds: Multiple taps for cooling and heating modes
• Venting: PVC/CPVC sidewall or roof venting
• Dimensions: Varies by model (typically 21"W x 21"D x 40"H)
• Sound Level: As low as 65 dB in operation
• Warranty: Limited lifetime heat exchanger, 10 years parts

Controls and Settings

Integrated control board manages all furnace operations. Access via service panel.

Control Board: LED status lights, dip switch settings, diagnostic codes.

Temperature Control: Via external thermostat. Blower Settings: Adjustable speeds for heating and cooling modes. Gas Pressure: Factory set, adjustable by technician. Safety Controls: Automatic shutdown for fault conditions. Diagnostic Codes: Flash patterns indicate specific operational status or fault conditions.

Venting and Ductwork

Proper venting critical for safe operation and efficiency.

1. Vent Materials: Use only approved PVC or CPVC pipe.
2. Vent Routing: Maintain proper slope for condensate drainage.
3. Clearances: Maintain required distances from combustible materials.
4. Terminations: Follow manufacturer specifications for intake and exhaust locations.
5. Duct Sizing: Ensure proper CFM delivery to all rooms.

Tip: Regular inspection of vent system prevents blockage and ensures safety.

Operating Instructions

Normal operation controlled by thermostat.

1. Set thermostat to desired temperature.
2. Furnace will initiate heating cycle when temperature drops below set point.
3. Inducer motor starts first to establish draft.
4. Hot surface igniter activates, followed by gas valve opening.
5. Flame sensor verifies ignition, blower motor starts after heat exchanger warms.
6. Cycle continues until thermostat satisfaction.
7. For shutdown, set thermostat below room temperature or use system switch.

WARNING! Never operate furnace with access panels removed. Keep area around furnace clear.

Maintenance Procedures

Annual maintenance by qualified technician recommended.

1. Filter Replacement: Monthly during heating season (1" filters) or per manufacturer schedule.
2. Heat Exchanger Inspection: Annual visual inspection for cracks or damage.
3. Burner Cleaning: Remove debris and ensure proper flame pattern.
4. Blower Cleaning: Remove dust and debris from blower wheel and housing.
5. Drain System: Clear condensate lines and trap of obstructions.
6. Vent Inspection: Check for blockages or damage.

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

Safety Features

Multiple safety systems protect against hazardous conditions.

Regulatory Information

ANSI Z21.47: Certified for natural gas and propane operation. CSA International: Approved for US and Canadian installation. UL Listed: Electrical components certified. Energy Star: Meets or exceeds efficiency requirements. For technical support, contact Ducane HVAC at 1-800-338-0525 or visit www.ducanehvac.com.

Troubleshooting

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

Service: 1-800-338-0525; www.ducanehvac.com