1. Introduction
Thank you for choosing the COSMO COS-QB90 36-inch Under Cabinet Range Hood. This manual provides essential information for the safe and efficient installation, operation, and maintenance of your new appliance. Please read all instructions carefully before use and retain this manual for future reference.
Important Safety Information
- Always disconnect power before servicing or cleaning the unit.
- Ensure proper installation by following all local codes and ordinances.
- This appliance is intended for residential use only.
- To reduce the risk of fire, use only metal ductwork.
- Never leave surface units unattended at high settings. Boil-overs cause smoking and greasy spill-overs that may ignite.
2. Product Overview
The COSMO COS-QB90 is a 36-inch under cabinet range hood designed to effectively ventilate your kitchen. It features a durable stainless steel construction, powerful airflow, and user-friendly controls.
Key Components
- Stainless Steel Housing
- Push Button Control Panel
- LED Lighting
- ARC-FLOW Permanent Baffle Filters
- Twin Centrifugal Motors
- Duct Connector (Round 7.9-inch)
Figure 2.1: Front view of the COSMO COS-QB90 range hood, showcasing its stainless steel finish and control panel.
Figure 2.2: Bottom view of the range hood, highlighting the baffle filters and integrated LED lights.
3. Setup (Installation)
Proper installation is crucial for the performance and safety of your range hood. It is recommended that installation be performed by two people due to the size and weight of the appliance.
3.1 Pre-Installation Checks
- Verify that the product dimensions (35.75" W x 22" D x 10" H) fit your installation site.
- Ensure electrical requirements (120V/60Hz, 3 Prong Plug) are met.
- Confirm duct size (Top Vented 7.9" Round) is compatible with existing ductwork or plan for new ducting.
- Unpack all components and inspect for any damage.
3.2 Mounting Instructions
Use the provided installation template to mark drilling points for mounting screws and duct openings. Securely fasten the range hood to the underside of the cabinet and to the wall studs for stability.
Figure 3.1: Detailed dimensions and mounting points for the range hood, including top and rear air vents.
3.3 Ducting Options
The COS-QB90 is designed for ducted operation. Connect the 7.9-inch round duct connector to your home's ventilation system. Flexible ducting is included for convenient installation. For optimal performance and reduced noise, rigid ducting (sold separately) is recommended.
For ductless (recirculating) operation, a Carbon Filter Kit (Part CFK5, sold separately) is required. Consult the Carbon Filter Kit instructions for installation details.
Figure 3.2: Top view of the range hood, illustrating the round duct connection point.
3.4 Electrical Connection
Connect the range hood to a grounded 120V/60Hz electrical outlet. Ensure all electrical connections comply with local codes.
Video 3.1: Installation overview for the Cosmo QB90 36-inch Under Cabinet Range Hood. This video demonstrates the general steps for mounting and connecting the unit.
Video 3.2: Quick Start Guide for Cosmo Under Cabinet Range Hood Q Series. This video provides a concise walkthrough of initial setup and basic functions.
4. Operating Instructions
The COS-QB90 features a push-button control panel for easy operation.
4.1 Control Panel Functions
Figure 4.1: Close-up of the push button control panel.
- Power Button: Press to turn the unit ON or OFF.
- Fan Speed Buttons (1, 2, 3): Select desired fan speed (Low, Medium, High) for ventilation.
- Light Button: Press to turn the LED lights ON or OFF.
4.2 Timer Function
The range hood may include a timer function to automatically shut off the fan after a set period. Refer to the specific control panel markings for timer activation and adjustment.
5. Maintenance
Regular maintenance ensures optimal performance and longevity of your range hood.
5.1 Filter Cleaning
The ARC-FLOW Permanent Baffle Filters are dishwasher-safe. For best results, remove filters and place them in the dishwasher. For manual cleaning, soak filters in hot water with detergent and scrub with a non-abrasive brush.
Figure 5.1: Close-up of a removable baffle filter.
5.2 Exterior Cleaning
Clean the exterior stainless steel surfaces regularly with a soft cloth and a non-abrasive stainless steel cleaner. Always wipe in the direction of the grain to prevent scratching.
5.3 Light Bulb Replacement
The range hood uses energy-efficient 1.5-watt LED lights. If replacement is necessary, ensure the power is disconnected and follow the instructions for safe removal and installation of new LED bulbs.
Figure 5.2: View of the integrated LED lighting.
6. Troubleshooting
Before contacting customer support, review the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Fan does not operate | No power; Motor failure; Control panel issue | Check power supply; Contact customer support for motor/control panel issues. |
| Lights do not work | Faulty bulb; Wiring issue | Replace LED bulb; Check wiring connections. |
| Insufficient airflow | Clogged filters; Restricted ductwork; Incorrect fan speed | Clean filters; Inspect ductwork for obstructions; Increase fan speed. |
| Excessive noise | Loose parts; Improper installation; Restricted airflow | Check for loose components; Ensure proper installation; Clear any airflow obstructions. |
7. Specifications
| Feature | Specification |
|---|---|
| Model | COS-QB90 |
| Dimensions (W x D x H) | 35.75" x 22" x 10" |
| Air Flow Capacity | 500 CFM |
| Material | Stainless Steel |
| Noise Level | As low as 40 dB (lowest speed) |
| Mounting Type | Under Cabinet Mount |
| Controls Type | Push Button Controls |
| Number of Speeds | 3 |
| Lighting | 1.5-watt LED |
| Filter Type | ARC-FLOW Permanent Baffle Filters (Dishwasher-Safe) |
| Ventilation Type | Ducted (7.9" Round Top Vent) |
| Electrical Requirements | 120V/60Hz, 3 Prong Plug |
| Item Weight | 62.8 Pounds |
8. Warranty and Support
8.1 Limited Warranty
This COSMO range hood comes with a 2-YEAR LIMITED PARTS WARRANTY. This warranty covers defects in materials or workmanship under normal use and service. Please retain your proof of purchase for warranty claims.
8.2 Customer Support
Our customer support team is based in the USA and is available to assist with any questions or issues you may encounter. For technical assistance, warranty claims, or general inquiries, please visit our official website or contact us directly.
- Website: www.cosmoappliances.com
- Email: support@cosmoappliances.com
