ruud furnace manual silhouette

The Ruud Furnace Manual Silhouette is a comprehensive guide for the Ruud Silhouette series gas furnaces, featuring high-efficiency condensing technology, variable-speed blower motors, advanced diagnostic systems, and quiet operation. This manual covers installation, operation, maintenance, troubleshooting, and safety procedures for residential heating systems. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

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

Features at a Glance

Key components: Variable-speed ECM blower motor, two-stage gas valve, hot surface ignitor, flame sensor, pressure switches, integrated control board.

Feature	Description
Variable-speed blower	Provides consistent airflow and quiet operation
Two-stage gas valve	Offers high and low fire settings for efficiency
Hot surface ignitor	Reliable electronic ignition system
Flame sensor	Monitors burner operation for safety
Pressure switches	Ensures proper venting operation
Integrated control board	Advanced diagnostics and system control
Condensing technology	High efficiency up to 96% AFUE
Quiet operation	Sound-absorbing insulation and design
LED status lights	Visual diagnostic indicators
Multi-speed capability	Compatible with various duct systems

Installation

Unpack and inspect contents. Ensure proper location and clearances.

Select location: Choose area with proper clearances and ventilation access.
Gas connection: Use approved gas pipe and fittings; pressure test for leaks.
Electrical connection: Connect to 120V AC power; follow local codes.
Vent system: Install PVC vent pipes according to manufacturer specifications.
Ductwork: Connect supply and return ducts; ensure proper sizing.

WARNING! Installation must be performed by qualified HVAC technician. Gas leaks can cause explosion or fire.

First-Time Setup

Power on furnace; follow startup sequence.

Gas pressure adjustment: Set manifold pressure to specifications on rating plate.
Blower speed settings: Adjust dip switches for proper airflow.
Thermostat configuration: Connect compatible thermostat for two-stage operation.
System check: Verify proper ignition sequence and flame operation.
Safety testing: Test limit switches and pressure switches for proper function.

CAUTION! Never bypass safety controls. Ensure proper combustion air supply.

Specifications

Model Series: Silhouette II
Efficiency: Up to 96% AFUE
Stages: Two-stage heating operation
Blower Motor: Variable-speed ECM
Gas Type: Natural gas or LP (with conversion kit)
Input BTU: 40,000 to 120,000 BTU/hr
Voltage: 120V AC, 60Hz
Sound Level: As low as 65 dB
Warranty: Limited lifetime heat exchanger, 10 years parts

Controls and Settings

Access control board via front panel. LED status lights indicate system operation.

Control Board: POWER, STATUS LED, DIAGNOSTIC codes, DIP switches for configuration.

Temperature: Two-stage operation with compatible thermostat. Blower: Variable-speed settings via DIP switches. Safety: Limit switches, pressure switches, flame rollout protection. Diagnostics: LED flash codes for troubleshooting (1 flash = normal, 2 flashes = pressure switch, etc.).

Connecting Components

Thermostat: Two-stage heat compatible. Vent system: PVC pipes. Gas line: Black iron or CSST.

Turn off power and gas supply before making connections.
Match thermostat wires to control board terminals (R, W, W2, G, C).
Install vent pipes with proper slope and supports.
Connect gas line with approved fittings and compound.

Tip: Use nitrogen when brazing to prevent oxidation in heat exchanger.

Operating Procedures

Normal heating cycle with two-stage operation.

Startup: Thermostat calls for heat, inducer motor starts, pressure switch proves.
Ignition: Hot surface ignitor glows, gas valve opens, flame established.
Heating: Blower starts after heat exchanger warms, delivers heated air.
Staging: First stage operates for moderate heat, second stage for maximum output.
Shutdown: Thermostat satisfied, gas valve closes, blower continues for cool-down.

WARNING! Never operate without access panels installed. Keep combustible materials away.

Maintenance Features

Annual maintenance required for optimal performance and warranty.

Care & Cleaning

Turn off power before servicing. Clean burners, heat exchanger, and blower annually.

CAUTION! Do not use compressed air on electronic components. Replace filters monthly during heating season.

Regulatory Information

UL certified; meets ANSI Z21.47 standards. CSA certified in Canada. Manufactured to comply with U.S. Department of Energy efficiency standards. For support, visit www.ruud.com or contact 1-800-848-6036.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power/thermostat	Check circuit breaker; verify thermostat settings and batteries.
No heat	Gas supply/ignition	Verify gas valve open; check for ignition lockout; reset if needed.
Short cycling	Dirty filter/limits	Replace air filter; check for blocked vents or dirty flame sensor.
Blower not running	Motor/control	Check blower door switch; verify control board output to motor.
Error codes flashing	System faults	Count LED flashes; refer to diagnostic chart in manual.

Reset: Turn power off for 30 seconds to reset control board.

Service: 1-800-848-6036; www.ruud.com