Newmac Wood Furnace Manual

The Newmac Wood Furnace is a high-efficiency heating system designed for residential and commercial use. This manual covers the NC, NW, and NWA series wood furnaces with features including cast iron construction, secondary combustion system, thermostatic draft control, ash pan, firebrick lining, and compatibility with existing ductwork. Below are key sections for safety, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Cast iron firebox, secondary combustion chamber, thermostatic draft control, ash pan, firebrick lining, heat exchanger, blower system, and temperature controls.

Installation Requirements

Proper installation is critical for safety and performance. Consult local building codes and hire qualified professionals.

1. Location: Install on non-combustible surface with proper clearances to combustibles.
2. Chimney: Connect to approved masonry or factory-built chimney meeting local codes.
3. Ductwork: Ensure proper sizing and sealing of supply and return ducts.
4. Electrical: Connect to dedicated 120V circuit with proper grounding.
5. Combustion air: Provide adequate fresh air supply for proper combustion.

WARNING! Improper installation may cause fire, property damage, or personal injury. Follow all local codes and manufacturer instructions.

First-Time Setup

Complete initial setup before first use to ensure proper operation.

1. Inspect unit: Check for shipping damage and remove all packaging materials.
2. Install firebrick: Position firebricks according to diagram in installation section.
3. Connect ductwork: Attach supply and return ducts using proper sealing methods.
4. Connect chimney: Install chimney with proper clearances and support.
5. Test operation: Perform initial fire with small load to cure paints and sealants.
6. Adjust draft: Set thermostatic control for optimal burning conditions.

CAUTION! Allow proper curing time during first fires. Ensure adequate ventilation.

Technical Specifications

• Models: NC Series, NW Series, NWA Series
• Heating Capacity: 60,000 - 150,000 BTU/hr depending on model
• Firebox Material: Cast iron with steel reinforcement
• Efficiency: 75-85% depending on model and installation
• Fuel: Seasoned hardwood (recommended moisture content below 20%)
• Log Length: Up to 24 inches maximum
• Blower: Multi-speed, thermally activated
• Electrical: 120V AC, 60Hz, 5-10 amps
• Weight: 350-650 lbs depending on model
• Warranty: Limited lifetime on cast iron, 1 year on components

Controls and Operation

Understanding furnace controls ensures efficient and safe operation.

Primary Controls: Thermostatic draft control, blower speed control, manual bypass damper, ash door, loading door.

Operation: Load wood through front door, adjust draft control for desired burn rate, monitor temperature gauges, activate blower when heat exchanger reaches operating temperature. Adjust blower speed for comfort and efficiency. Clean ash pan regularly to maintain proper airflow.

Seasonal Operation: During heating season, maintain consistent fires. During off-season, clean thoroughly and store properly.

Ductwork Connection

Proper ductwork connection is essential for efficient heat distribution.

1. Size ducts appropriately for furnace output and home layout.
2. Use approved metal ductwork with proper insulation.
3. Seal all connections with high-temperature sealant.
4. Install dampers to balance heat distribution.
5. Ensure adequate return air capacity.

Tip: Have duct system professionally designed and balanced for optimal performance.

Fuel Requirements

Proper fuel selection and preparation ensure efficient operation and long furnace life.

1. Wood Type: Use seasoned hardwoods (oak, maple, ash) for best results.
2. Moisture Content: Below 20% for efficient combustion and reduced creosote.
3. Log Size: Split wood to 4-6 inch diameter for optimal burning.
4. Storage: Keep wood dry and elevated off ground.
5. Loading: Place wood carefully to allow proper airflow around logs.
6. Never Use: Treated wood, painted wood, plastics, or garbage.

WARNING! Burning improper materials may damage furnace and create hazardous conditions.

Safety Features

Multiple safety systems protect against hazardous conditions.

High Temperature Limit Switch: Automatically shuts down blower if temperatures exceed safe limits. Pressure Relief Valve: Prevents overpressure in heat exchanger. Door Latches: Secure loading and ash doors during operation. Chimney Spark Arrestor: Prevents emission of burning embers. Blower Delay: Prevents cold air circulation until heat exchanger warms.

Maintenance & Cleaning

Regular maintenance ensures safe and efficient operation.

Daily: Remove ashes from firebox and ash pan. Weekly: Inspect firebricks and replace if cracked. Monthly: Clean heat exchanger tubes and flue passages. Seasonally: Inspect and clean chimney, check door gaskets, lubricate blower motor. Annually: Professional inspection of all components.

CAUTION! Always allow furnace to cool completely before performing maintenance. Wear protective gloves and eyewear.

Regulatory Information

UL/ULC certified to applicable safety standards. EPA Phase II qualified for emissions. Complies with local building codes and installation requirements. Manufactured to CSA B366.1 standards. For technical support and warranty claims, contact Newmac Manufacturing Inc. or authorized dealers. Keep this manual for reference and future service needs.

Troubleshooting

Service: Contact authorized Newmac dealer for professional service. Do not attempt major repairs without proper training.