Ruud Silhouette Gas Furnace Manual PDF

The Ruud Silhouette Gas Furnace is a high-efficiency residential heating system featuring advanced combustion technology, variable-speed blower motor, electronic ignition, multi-speed operation, and energy-saving capabilities. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation Requirements 3. First-Time Setup 4. Technical Specifications 5. Controls and Settings 6. Operating Instructions 7. Maintenance Procedures 8. Safety Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-efficiency heat exchanger, electronic ignition system, variable-speed blower motor, digital thermostat interface, safety controls, and diagnostic LED indicators.

Feature	Description
Heat Exchanger	Stainless steel construction for maximum efficiency and durability
Blower Motor	Variable-speed ECM motor for quiet operation and energy savings
Ignition System	Electronic hot surface ignition for reliable startup
Gas Valve	Modulating gas valve for precise temperature control
Thermostat Interface	Compatible with most digital thermostats
Safety Controls	Multiple safety switches and pressure sensors
Diagnostic LED	Flashing LED indicates system status and error codes
Air Filter	Standard 1-inch or 4-inch media filter compatibility
Venting	PVC pipe venting for sidewall or roof termination
Efficiency Rating	Up to 96% AFUE rating

Installation Requirements

Professional installation required. Ensure proper clearances and venting.

Location: Install in well-ventilated area with proper clearances to combustible materials.
Gas Connection: Use approved gas piping and fittings; pressure test required.
Electrical: 120V AC power supply with proper grounding.
Venting: Install PVC vent pipes according to local codes and manufacturer specifications.
Drainage: Connect condensate drain line to proper drainage system.

WARNING! Gas furnaces produce carbon monoxide; proper venting is critical. Installation must comply with all local codes.

First-Time Setup

Initial startup must be performed by qualified technician.

System Check: Verify all connections, gas pressure, and electrical wiring.
Venting Verification: Confirm proper vent pipe installation and clearances.
Gas Pressure Adjustment: Set manifold pressure according to specifications.
Blower Speed Settings: Adjust blower speeds for heating operation.
Thermostat Configuration: Program thermostat for optimal operation.

CAUTION! Never attempt first-time startup without proper training and equipment.

Technical Specifications

Model Series: Silhouette II 90+
Input BTU/h: 40,000 - 120,000 (varies by model)
Efficiency: Up to 96% AFUE
Gas Type: Natural Gas or LP (conversion kit required)
Electrical: 120V AC, 60Hz, 15 Amp circuit
Blower Motor: Variable-speed ECM
Sound Rating: As low as 65 dB
Warranty: Limited lifetime heat exchanger, 10 years parts
Venting: 2" PVC pipe (check local codes)
Operating Temp Range: -30°F to 120°F ambient

Controls and Settings

Access control board via front panel. Integrated control module with diagnostic capabilities.

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

Thermostat Settings: Heat/Cool/Auto modes, fan control, temperature setpoints. Blower Settings: Adjustable speeds for heating and continuous fan operation. Gas Valve: Modulating control for precise heat output. Safety Controls: Limit switches, pressure switches, flame sensor, rollout switches.

Operating Instructions

Normal operation through thermostat control.

Set thermostat to desired temperature and HEAT mode.
System will initiate startup sequence when heat is demanded.
Blower will start after warm-up period for safety.
System will cycle on/off to maintain set temperature.
Use FAN ON for continuous air circulation.

Tip: Keep thermostat away from heat sources and direct sunlight for accurate temperature control.

Maintenance Procedures

Regular maintenance ensures optimal performance and safety.

Monthly: Check and replace air filter as needed.
Seasonal: Inspect vent system for obstructions.
Annual: Professional inspection and cleaning recommended.
Blower Maintenance: Clean blower wheel and housing annually.
Heat Exchanger: Visual inspection for cracks or damage.
Burners: Clean and inspect for proper flame pattern.
Drain System: Flush condensate trap and drain lines.

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

Safety Features

Multiple safety systems protect against hazardous conditions. Flame Rollout Switches: Detect improper burner operation. Limit Switches: Prevent overheating. Pressure Switches: Ensure proper venting operation. Flame Sensor: Confirms burner ignition. Gas Valve: Automatic shutoff in case of system fault.

Care & Cleaning

Regular cleaning maintains efficiency and extends equipment life.

CAUTION! Always disconnect power before cleaning. Use soft brush and vacuum for dust removal. Never use water or cleaning chemicals on electrical components.

Regulatory Information

UL listed and ANSI certified. Complies with Department of Energy efficiency standards. Manufactured to meet or exceed ASHRAE standards. For technical support, contact Ruud at 1-800-722-2102 or visit www.ruud.com. Installation must comply with National Fuel Gas Code NFPA 54 and local building codes.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, safety lockout	Check circuit breaker, thermostat settings, reset power
No heat	Gas supply, ignition failure	Verify gas valve on, check for error codes on control board
Blower won't run	Motor, capacitor, control board	Check for power to blower, inspect capacitor, verify control signals
Short cycling	Dirty filter, airflow restriction	Replace air filter, check for blocked vents or registers
Unusual noises	Loose components, airflow	Inspect for loose panels, clean blower wheel, check ductwork

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

Service: 1-800-722-2102; www.ruud.com