Hydro Flame Furnace Manual 7220

The Hydro Flame Furnace Model 7220 is a high-efficiency heating system designed for residential and light commercial use. This forced-air furnace features advanced combustion technology, digital thermostat compatibility, multiple heat settings, safety shut-off systems, and energy-saving modes. Operating on natural gas or propane with 120V AC power supply. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: High-efficiency heat exchanger, electronic ignition system, multi-speed blower motor, digital control board, flame sensor, pressure switches, and safety shut-off valves.

Installation Requirements

Professional installation recommended. Verify local codes and obtain permits.

1. Location: Install in well-ventilated area with proper clearances (minimum 1 inch sides, 6 inches front).
2. Gas Connection: Use approved gas piping; pressure test before connection.
3. Electrical: 120V AC dedicated circuit with proper grounding.
4. Venting: Category IV vent system required; follow manufacturer specifications.
5. Combustion Air: Ensure adequate fresh air supply per local codes.

WARNING! Gas appliances can be hazardous; installation must be performed by qualified technician. Carbon monoxide poisoning risk if improperly installed.

Initial Setup & Commissioning

After installation, perform startup procedure with qualified technician.

1. Gas Pressure Check: Verify inlet and manifold pressures per specifications.
2. Venting Verification: Confirm proper draft and vent operation.
3. Electrical Check: Test voltage at control board and thermostat connections.
4. Ignition Sequence: Observe startup sequence for proper operation.
5. Temperature Rise: Measure and adjust airflow to achieve specified temperature rise.
6. Safety Tests: Verify all safety controls function properly.

CAUTION! Do not operate without proper commissioning. Incomplete setup can cause equipment damage or safety hazards.

Technical Specifications

• Model: Hydro Flame 7220
• Input Capacity: 70,000 BTU/hr
• Output Capacity: 56,000 BTU/hr
• Efficiency: 80% AFUE
• Fuel Type: Natural Gas or Propane (conversion kit required)
• Electrical: 120V AC, 60Hz, 3.5 Amps
• Blower Motor: ECM, multi-speed
• Venting: Category IV, 2-inch PVC
• Dimensions: 21" W × 28" H × 26" D
• Weight: 98 lbs
• Operating Temp Range: -30°F to 120°F

Controls and Operation

Integrated control board manages all furnace functions. Access via front service panel.

Control Board LED: Displays status codes (steady green = normal operation, flashing = error code).

Thermostat Settings: Compatible with most 24V thermostats. Recommended settings: HEAT mode, AUTO fan, desired temperature setpoint.

Operating Modes: Single-stage heating, continuous fan operation available. Blower delay on startup and shutdown for efficiency.

Gas Valve: Dual-stage operation for improved comfort and efficiency.

Venting and Airflow

Category IV sealed combustion system requires specific venting configuration.

1. Vent Pipes: Use only manufacturer-approved PVC materials.
2. Vent Termination: Maintain proper clearances from windows, doors, and air intakes.
3. Airflow: Ensure return and supply ducts are properly sized and sealed.
4. Filters: Replace standard 1-inch filters monthly during heating season.
5. Ductwork: Insulate ducts in unconditioned spaces to prevent heat loss.

Tip: Regular filter changes maintain efficiency and prevent overheating.

Maintenance Procedures

Annual professional maintenance recommended. Basic user maintenance includes:

1. Filter Replacement: Replace 1-inch filter monthly during operation.
2. Visual Inspection: Check for debris around unit and vent terminations.
3. Burner Inspection: Qualified technician should inspect and clean burners annually.
4. Heat Exchanger: Professional visual inspection for cracks or damage.
5. Blower Assembly: Clean blower wheel and housing annually.
6. Vent System: Verify clear and unobstructed annually.
7. Electrical Connections: Check for tightness and corrosion.

WARNING! Gas and electrical components should only be serviced by qualified technicians. User maintenance limited to filter replacement and basic cleaning.

Safety Systems

Multiple safety features protect against hazardous conditions:

• Flame Rollout Switch: Shuts off gas if flame detected outside burner area
• High Limit Switch: Prevents overheating due to restricted airflow
• Pressure Switches: Verify proper venting operation before ignition
• Flame Sensor: Confirms burner ignition; shuts off gas if no flame detected
• Ignition Lockout: Prevents repeated ignition attempts after failures
• Gas Valve Shut-off: Automatic closure during power outage or safety trip

Care & Cleaning

Turn off power and gas supply before cleaning. Use soft brush and vacuum for dust removal.

Exterior: Wipe with damp cloth; avoid chemical cleaners.

Interior: Professional cleaning only; do not attempt user cleaning of burners or heat exchanger.

Vent Terminations: Keep clear of snow, leaves, and debris.

CAUTION! Never use water or liquid cleaners on electrical components. Carbon monoxide hazard if combustion system is disturbed.

Regulatory Compliance

ANSI Z21.47/CSA 2.3: Certified for safety standards. UL listed. Meets DOE efficiency requirements. Installation must comply with National Fuel Gas Code (NFPA 54), local building codes, and manufacturer specifications. For technical support or warranty claims, contact Hydro Flame Customer Service at 1-800-555-HEAT or visit www.hydroflame.com.

Troubleshooting Guide

Reset Procedure: Turn thermostat to OFF, turn off power at service switch for 30 seconds, restore power, set thermostat to HEAT.

Emergency Shut-off: Turn off gas supply at manual shut-off valve and disconnect power if unsafe condition suspected.

Service: 1-800-555-HEAT; www.hydroflame.com