Gravity Vented Wall Furnace Manual

The Gravity Vented Wall Furnace is a high-efficiency heating system designed for residential use, featuring natural convection heating, wall-mounted installation, gravity venting system, manual controls, safety shut-off mechanisms, and energy-efficient operation. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Wall-mounted furnace unit, gravity vent system, manual control valve, pilot light assembly, heat exchanger, and safety shut-off valve.

Installation

Unpack and inspect contents. Ensure proper clearances to combustible materials.

1. Select location: Choose exterior wall with proper clearances (minimum 6 inches from combustible materials).
2. Mount furnace: Secure mounting brackets to wall studs using provided hardware.
3. Install vent system: Connect vent pipe through wall, ensuring proper slope for gravity flow.
4. Connect gas line: Use approved gas piping and fittings; pressure test before operation.
5. Install vent cap: Secure exterior vent cap with weatherproof sealant.

WARNING! Installation must be performed by qualified technician. Follow all local codes and regulations.

First-Time Setup

Complete installation verification before initial operation.

1. Check gas connections: Verify all connections are tight and leak-free.
2. Test vent system: Ensure proper draft and no obstructions.
3. Light pilot: Follow lighting instructions on control panel.
4. Test operation: Turn control valve to desired temperature setting.
5. Check for proper ignition and flame characteristics.

CAUTION! If gas odor is detected, shut off gas immediately and ventilate area.

Specifications

• Heating Capacity: 30,000-40,000 BTU/hr
• Efficiency: 80% AFUE
• Fuel Type: Natural Gas
• Venting: Gravity (Type B)
• Gas Connection: 1/2" NPT
• Dimensions: 24" W x 36" H x 12" D
• Weight: 45 lbs
• Clearances: 6" sides, 12" top, 6" front
• Operating Pressure: 3.5" W.C. natural gas
• Electrical: None required (manual operation)

Controls and Settings

Manual control valve located on front panel. Pilot assembly with thermocouple safety.

Control Valve: OFF/PILOT/ON positions, temperature adjustment dial.

Pilot Lighting: Turn knob to PILOT, depress and hold while lighting pilot. Continue holding for 30 seconds after ignition. Turn to ON position.

Temperature Control: Rotate dial clockwise to increase temperature, counterclockwise to decrease.

Safety Features: Thermocouple pilot safety, oxygen depletion sensor (if equipped).

Connecting to Gas Line

Use approved gas piping materials and follow local codes.

1. Shut off gas supply at main valve.
2. Install sediment trap in gas line before furnace connection.
3. Use pipe joint compound or Teflon tape on threaded connections.
4. Pressure test system at 14" W.C. for 10 minutes with no pressure drop.
5. Check for leaks with soap solution at all connections.

Tip: Always use two wrenches when making gas connections to avoid damaging components.

Operation

Manual operation with standing pilot light.

1. Ensure area around furnace is clear of combustible materials.
2. Check that vent system is unobstructed.
3. Turn control knob to PILOT position.
4. Depress and hold knob while lighting pilot with match or lighter.
5. Continue holding for 30 seconds after pilot lights.
6. Turn knob to ON position.
7. Adjust temperature dial to desired setting.
8. To shut off: Turn knob to OFF position.

WARNING! Never operate furnace with access panel removed. Keep children and pets away from hot surfaces.

Safety Features

Thermocouple Safety: Shuts off gas if pilot flame is extinguished. Oxygen Depletion Sensor: Monitors oxygen levels and shuts off furnace if levels drop below safe limits (if equipped). Manual Reset: Requires manual intervention after safety shut-off.

Maintenance & Cleaning

Annual maintenance recommended before heating season.

1. Turn off gas supply and allow furnace to cool completely.
2. Remove access panel and clean heat exchanger surfaces with soft brush.
3. Inspect and clean pilot assembly.
4. Check vent system for obstructions.
5. Verify proper burner flame (blue with yellow tips).
6. Check all gaskets and seals for deterioration.

CAUTION! Never use compressed air to clean furnace components. Use only soft brushes and vacuum.

Regulatory Information

ANSI Z21.91: Certified for vented wall furnace applications. CSA 2.26: Complies with Canadian standards. UL listed components. For support, contact manufacturer at 1-800-HEAT-HELP or visit www.gravityfurnace.com. Installation must comply with National Fuel Gas Code NFPA 54 and local building codes.

Troubleshooting

Reset: Turn control knob to OFF, wait 5 minutes, then relight following normal procedure.

Service: 1-800-HEAT-HELP; www.gravityfurnace.com