Cook Rite ATO-4B(NG)
CookRite ATO-4B Commercial Natural Gas Range User Manual
Model: ATO-4B(NG)
Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your CookRite ATO-4B Commercial Natural Gas Range. Please read this manual thoroughly before installation and use, and keep it for future reference.
The CookRite ATO-4B is a robust commercial natural gas range featuring four powerful burners and a standard oven, designed for demanding restaurant environments. It boasts a durable stainless steel exterior, heavy-duty cast iron grates, and precise temperature control for versatile cooking.
Safety Information
WARNING:
- Installation, adjustment, alteration, service, or maintenance must be performed by a qualified installer, service agency, or the gas supplier.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
- Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death.
- Ensure adequate ventilation when operating the appliance.
- Keep appliance area clear and free from combustible materials.
Setup and Installation
Proper installation is crucial for the safe and efficient operation of your range. This appliance must be installed in accordance with local codes, or in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane Installation Code, CSA B149.1.
Unpacking
Carefully remove the appliance from its packaging. Inspect for any shipping damage. Report any damage immediately to the carrier and your dealer.
Location
Place the range on a level, non-combustible surface. Ensure sufficient clearance from combustible walls and materials. The appliance is equipped with four casters for mobility, but it must be secured in place during operation.
Gas Connection
The range is designed for Natural Gas (NG) and comes with a 3/4” NPT rear gas connection and regulator. Ensure the gas supply pressure matches the appliance requirements. A qualified technician must perform all gas connections.
Leveling
Use a spirit level to ensure the range is perfectly level. Adjust the casters if necessary to achieve stability and proper drainage.

Figure 1: Front view of the CookRite ATO-4B Commercial Natural Gas Range, showing the four top burners, control knobs, and oven door.
Operating Instructions
Top Burners
- Ensure all grates are properly seated over the burners.
- Turn the desired burner control knob to the "ON" position.
- Ignite the pilot light manually using a long match or lighter.
- Adjust the flame intensity by rotating the control knob between "LOW" and "HIGH" settings.
- To turn off, rotate the knob to the "OFF" position.

Figure 2: Close-up view of the heavy-duty 12" x 12" removable cast iron top grates and burner heads.
Standard Oven
- Open the oven door.
- Locate the oven pilot light.
- Turn the oven temperature control knob to the desired setting (range 175°F to 550°F).
- Manually ignite the pilot light. Hold the knob in for a few seconds after ignition to allow the thermocouple to heat up.
- Close the oven door. The main burner will ignite once the pilot is established.
- To turn off, rotate the knob to the "OFF" position.

Figure 3: View of the CookRite ATO-4B with the standard oven door open, revealing the interior rack.
Maintenance and Cleaning
Regular cleaning and maintenance will extend the life of your appliance and ensure optimal performance.
Daily Cleaning
- Exterior Surfaces: Wipe down stainless steel surfaces with a damp cloth and mild detergent. Dry thoroughly to prevent water spots. Do not use abrasive cleaners or steel wool.
- Top Grates: Remove the cast iron grates and clean them with a stiff brush and hot soapy water. For stubborn residue, a non-abrasive scouring pad can be used. Ensure they are completely dry before replacing.
- Drip Pans: Empty and clean the drip pans located beneath the burners regularly to prevent grease buildup.
Oven Cleaning
- Allow the oven to cool completely before cleaning.
- Remove oven racks and clean them separately.
- Wipe the interior with a damp cloth and a mild, non-abrasive oven cleaner. Follow the cleaner manufacturer's instructions.
- Rinse thoroughly and dry.
Periodic Maintenance
- Inspect gas connections and hoses for leaks or damage regularly.
- Ensure burner ports are clear of debris. Use a wire brush if necessary.
- Have the appliance inspected by a qualified service technician annually.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Burner not igniting | No gas supply; Clogged pilot light; Clogged burner port | Check gas valve; Clean pilot light orifice; Clean burner ports |
| Oven not heating | Pilot light out; Gas supply issue; Thermocouple fault | Relight pilot; Check gas supply; Contact service technician |
| Uneven flame | Clogged burner ports; Improper gas pressure | Clean burner ports; Have gas pressure checked by technician |
| Gas odor | Gas leak | Immediately shut off gas supply and ventilate area. Do NOT operate. Contact gas company and qualified technician. |
Specifications
Detailed specifications for the CookRite ATO-4B Commercial Natural Gas Range:

Figure 4: Technical diagram showing dimensions, specifications table, and certifications for the ATO-4B model.
| Feature | Detail |
|---|---|
| Model | ATO-4B(NG) |
| Dimensions (W x D x H) | 24" x 31" x 57 3/8" (56" to top of backguard) |
| Weight | Approx. 302 lbs |
| Gas Type | Natural Gas (NG) |
| Total BTU | 124,000 BTU/hr |
| Burners | 4 x 25,000 BTU/hr Hot Plates |
| Oven Burner | 1 x 24,000 BTU/hr |
| Oven Temperature Range | 175°F to 550°F |
| Oven Size (W x D x H) | 20" x 26" x 14" |
| Material | Stainless Steel exterior, Cast Iron grates |
| Gas Connection | 3/4" NPT rear connection |
| Mobility | Four (4) casters standard |
Warranty and Support
Warranty Information
This CookRite ATO-4B Commercial Natural Gas Range comes with a 1-Year Parts and Labor Warranty from the date of purchase. This warranty covers defects in material and workmanship under normal use and service.
For warranty claims, please retain your proof of purchase and contact the dealer or manufacturer's authorized service center.
Customer Support
For technical assistance, parts, or service inquiries, please contact your authorized CookRite dealer or visit the official CookRite website for support contact information.
When contacting support, please have your model number (ATO-4B) and serial number (if applicable) ready.
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