1. Setup and Assembly
Carefully unpack all components and ensure all parts are present before beginning assembly. Assembly is recommended for two adults.
1.1 Unpacking
- Open all packaging carefully, avoiding the use of sharp objects that could damage the fabric.
- Remove all components from the boxes.
- Place all components on a clean, soft surface (e.g., the packaging cardboard or a blanket) to prevent scratches.
- Verify that all parts listed in the component identification section are present.
1.2 Component Identification
The Serene 5-Piece Modular Sectional Sofa includes the following components:
- Two (2) Armless Chairs
- Two (2) Corner Pieces
- One (1) Ottoman
- Reversible Back Pillows (quantity varies by module)
- Accent Pillows (included with certain modules)
- Legs (pre-attached or to be attached)

Figure 1: Front view of the Serene 5-Piece Modular Sectional Sofa. This image shows the assembled sofa with its modular components and reversible back pillows.

Figure 2: A single armless chair module. This component features an upholstered seat, a reversible back pillow, and an accent pillow.

Figure 3: A single corner module. This piece is designed to connect other modules and includes its back and accent pillows.

Figure 4: The spacious ottoman module. This upholstered piece provides additional seating or a footrest.
1.3 Assembly Steps
- Attach Legs: If not pre-attached, carefully screw the legs into the designated threaded holes on the bottom of each sofa module (armless chairs, corner pieces, and ottoman). Ensure all legs are securely tightened.
- Arrange Modules: Position the two corner pieces, two armless chairs, and one ottoman in your desired L-shape configuration. The modular design allows for flexibility.
- Connect Modules: Each module is designed to connect securely to adjacent pieces. Locate the interlocking brackets or connectors on the sides of the modules. Align and slide the brackets together to form a stable connection. Repeat for all connecting pieces.
- Place Cushions and Pillows: Position the seat cushions and reversible back pillows onto their respective modules. Arrange the accent pillows as desired.
- Final Check: Gently push and pull on the assembled sectional to ensure all connections are secure and the sofa is stable.
2. Usage Guidelines
The Serene Modular Sectional Sofa is designed for versatile use in your living space.
- Modular Arrangement: The 5-piece set (2 armless chairs, 2 corners, 1 ottoman) can be arranged in various L-shape configurations to suit your room layout. Ensure modules are properly connected using the interlocking brackets for stability.
- Reversible Back Pillows: The back pillows are reversible, allowing for even wear and extending their lifespan. Rotate them periodically.
- Seating Capacity: This sectional is designed to comfortably seat multiple individuals. Avoid standing or jumping on the sofa to prevent damage.
- Weight Distribution: Distribute weight evenly across the seating areas. Avoid concentrating heavy loads on a single point.

Figure 5: The Serene 5-Piece Modular Sectional Sofa arranged in an L-shape, demonstrating a typical usage configuration.
3. Care and Maintenance
Proper care will help maintain the appearance and extend the life of your sectional sofa.
3.1 General Care
- Regular Vacuuming: Vacuum regularly using a soft brush attachment to remove dust and debris.
- Fluff Cushions: Fluff and rotate seat and back cushions weekly to maintain their shape and prevent premature wear.
- Avoid Direct Sunlight: Prolonged exposure to direct sunlight can cause fabric fading. Position your sofa away from direct sunlight or use window coverings.
- Protect from Spills: Immediately blot spills with a clean, dry cloth. Do not rub, as this can spread the stain.
3.2 Cleaning Instructions (Cleaning Code: WS)
The fabric on this sectional sofa has a cleaning code of WS.
- W (Water-based cleaner): Use a water-based cleaning agent or foam.
- S (Solvent-based cleaner): Use a mild, water-free solvent or dry-cleaning product.
- Combined (WS): This code indicates that either a water-based cleaning agent or a solvent-based cleaning agent can be used.
- Spot Cleaning: For spot cleaning, use a mild, water-free solvent or a water-based foam upholstery cleaner. Pre-test a small, inconspicuous area first to ensure no discoloration or damage occurs.
- Professional Cleaning: For overall cleaning, professional upholstery cleaning is recommended.

Figure 6: Detailed view of the sectional's beige linen-like fabric, showing its texture and weave, which is suitable for WS cleaning code.
4. Troubleshooting
If you encounter any issues with your sectional sofa, refer to the following common solutions:
- Wobbly Modules: Ensure all connecting brackets between modules are fully engaged. Check that all legs are securely tightened.
- Uneven Cushions: Regularly fluff and rotate cushions to maintain their shape and evenness. If cushions appear permanently compressed, allow them to air out and reshape by hand.
- Fabric Snags: For minor snags, carefully trim loose threads with scissors. Do not pull them.
- Squeaking Noises: Squeaking can sometimes occur due to loose connections or friction between components. Re-tighten all hardware and ensure modules are properly aligned.
If problems persist, please contact Coaster Fine Furniture customer support.
5. Product Specifications
| Feature | Detail |
|---|---|
| Model Number | 551321-SETC |
| Brand | Coaster Fine Furniture |
| Color | Beige |
| Material | Engineered Wood, Fabric, Foam, Larch |
| Product Care Instructions | Cleaning Code: WS |
| Special Feature | Accent Pillows Included, Cushion Back, L-shape Design |
| Item Weight | 249 pounds (approx.) |
| Style | Transitional |
5.1 Dimensions
| Component | Width | Depth | Height |
|---|---|---|---|
| Overall Sectional | 120 inches | 120 inches | 33 inches |
| Armless Chair | 38 inches | 41 inches | 33 inches |
| Corner Piece | 41 inches | 41 inches | 33 inches |
| Ottoman | 41 inches | 41 inches | 20 inches |
| Component | Seat Width | Seat Depth | Seat Height |
|---|---|---|---|
| Sectional Seat | 20 inches | 24 inches | 20 inches |
| Armless Chair Seat | 38 inches | 24 inches | 20 inches |
| Corner Seat | 24 inches | 24 inches | 20 inches |
| Ottoman Seat | 41 inches | 41 inches | 20 inches |

Figure 7: An illustration detailing the overall dimensions of the assembled 5-piece sectional sofa, including width, depth, and height.

Figure 8: A diagram providing specific measurements for the armless chair module, including seat depth and height.

Figure 9: An illustration showing the dimensions of the corner module, including its width, depth, and seat height.

Figure 10: A diagram detailing the measurements of the ottoman module, including its width, depth, and height.
6. Warranty and Support
For specific warranty information regarding your Coaster Home Furnishings Serene Sectional Sofa, please refer to the documentation provided at the time of purchase or contact Coaster Fine Furniture customer support directly.
Customer Support: If you have questions about assembly, parts, or general product inquiries, please reach out to Coaster Fine Furniture customer support. Contact information can typically be found on the manufacturer's website or your purchase receipt.
Protection Plans: Extended protection plans may be available for purchase separately. These plans offer additional coverage beyond the manufacturer's standard warranty. Please review the terms and conditions of any such plan for details.
7. About Coaster Home Furnishings
Video 1: Coaster Home Furnishings Brand Introduction. This video provides an overview of Coaster Home Furnishings, showcasing their commitment to quality and style across various furniture collections.
Coaster Fine Furniture has been a provider of home furnishings for nearly four decades, offering a wide range of products designed to enhance various living spaces. Their collections aim to combine style, value, and comfort for diverse customer needs.





