1. Product Overview
The Noritz OQB-3706F is a direct pressure oil water heater designed exclusively for hot water supply. This unit is suitable for both indoor and outdoor installation and provides a heating capacity of 30,000 kcal. It incorporates various features to enhance user convenience and energy efficiency.
Key features include:
- Hot Water Only: Dedicated for hot water supply.
- Auto-Stop Type with Notification: Automatically stops hot water filling with an alert.
- Direct Pressure System: Provides strong and consistent water pressure.
- Indoor/Outdoor Compatible: Versatile installation options.
- Advanced Functions: PROTEC, Turbo Hot Water, Low Temperature Hot Water Output, Proportional Control, Power Saving Mode, Heater, Oil Supply Detection, and Solar Compatibility (note: hot water at remote setting temperature may not always be possible with solar).
Figure 1: Noritz OQB-3706F Oil Water Heater Main Unit. This image shows the exterior of the Noritz OQB-3706F oil water heater, highlighting its compact design suitable for various installation environments.
2. Installation and Setup
Important: Installation of this appliance must be performed by a qualified professional in accordance with all local and national regulations. Improper installation can lead to serious injury, property damage, or void the product warranty.
2.1 General Installation Guidelines
- Ensure the unit is installed on a level surface using a spirit level.
- If an exhaust cover is required, use only Noritz specified parts.
- When installing outdoors, if there is no fire wall between the unit and the oil tank, maintain a minimum distance of 2 meters (6.5 feet).
- Installers must adhere to all applicable laws and standards, including but not limited to:
- Technical Standards for Electrical Equipment
- Electrician's Law
- Internal Wiring Regulations
- Electrical Appliance Safety Law
- Building Standards Law
- Local Ordinances (Prefectural/Municipal)
- Fire Service Law
- Gas Business Law
- Liquefied Petroleum Gas Law
- Gas Appliance Installation Standards and Practical Guidelines (issued by Japan Gas Appliance Inspection Association)
- Refer to the detailed installation manual and instruction manual provided with the product for comprehensive installation procedures and precautions.
- Failures or damages resulting from installations that do not meet specified conditions will be subject to paid repair, even if within the warranty period.
- Customers are responsible for arranging the installation of the unit and any related construction work.
- Any parts not included with the product must be prepared by the customer.
- Compensation for construction delays caused by product delivery delays is not provided.
2.2 Outdoor Installation Specifics
- For outdoor installations, use the optional exhaust top "Outdoor Exhaust Top Y-90A" (sold separately).
- Oil supply pipes are sold separately and must be acquired by the customer.
- If the kitchen remote control is removed, cover the main unit's operation panel hole with the included "Operation Panel Cover".
3. Operating Instructions
This section details the operation of your Noritz OQB-3706F oil water heater using the control panel.
3.1 Control Panel Overview
Figure 2: Noritz OQB-3706F Control Panel. This image displays the user interface of the water heater, featuring a digital display and various control buttons for setting temperature and managing hot water functions.
The control panel (RC-7626M) allows you to manage the water heater's functions. Refer to Figure 2 for button locations.
- 運転 入/切 (Operation On/Off): Press this button to turn the water heater on or off.
- 優先 (Priority) Indicator: Illuminates when a priority setting is active.
- 燃焼 (Combustion) Indicator: Illuminates when the burner is active and heating water.
- 時計表示 (Clock Display): Shows the current time. Press and hold for 2 seconds to adjust the clock.
- 湯量設定 (Hot Water Volume Setting): Use this button to set the desired volume of hot water for filling a bath.
- お湯はりブザー (Hot Water Fill Buzzer): Activates a buzzer notification when hot water filling is complete.
- Temperature Adjustment Buttons (Up/Down Arrows): Use these to adjust the desired hot water temperature.
3.2 Hot Water Filling Process
Figure 3: Hot Water Filling Process. This diagram illustrates the sequence of operations for filling a bath with hot water, from initiation to completion with notification.
- お湯はり開始 (Hot Water Filling Start): Open the hot water faucet to begin filling. The desired hot water volume for the bathtub can be set via the kitchen remote control.
- お知らせ (Notification): A buzzer from the kitchen (or bathroom) remote control will sound to notify you of the filling status.
- お湯はり終了 (Hot Water Filling End): Close the hot water faucet to stop the hot water filling process.
4. Maintenance
Regular maintenance ensures the longevity and efficient operation of your Noritz OQB-3706F oil water heater. Always turn off the power and oil supply to the unit before performing any maintenance.
- Annual Inspection: It is recommended to have a qualified service technician inspect the unit annually.
- Exterior Cleaning: Wipe the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Oil Filter Cleaning/Replacement: Check and clean or replace the oil filter as recommended in the detailed service manual.
- Exhaust Pipe Inspection: Periodically check the exhaust pipe for any blockages, damage, or signs of corrosion. Ensure proper ventilation.
- Water Leak Check: Regularly inspect for any signs of water leaks around the unit and connections.
For detailed maintenance procedures, refer to the comprehensive service manual or consult a qualified Noritz service professional.
5. Troubleshooting
This section provides basic troubleshooting steps for common issues. For more complex problems, contact customer support.
5.1 Common Issues and Solutions
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water | Unit is off, no oil, power outage, or error code displayed. | Ensure unit is on. Check oil tank level. Verify power supply. Check control panel for error codes and consult the detailed manual. |
| Water not hot enough | Temperature setting too low, or insufficient oil supply. | Increase temperature setting on the control panel. Check oil level. |
| Unusual noises | Air in the system, or component malfunction. | If noises persist, turn off the unit and contact a qualified technician. |
| Error code displayed | Specific malfunction detected by the unit. | Note the error code and refer to the detailed instruction manual for specific troubleshooting steps, or contact customer support. |
If the problem persists after attempting these solutions, please contact Noritz customer support or a certified service technician.
6. Specifications
Detailed technical specifications for the Noritz OQB-3706F Oil Water Heater.
Figure 4: Noritz OQB-3706F Technical Diagram. This detailed diagram provides dimensions, component layout, and various technical specifications for the water heater, essential for installation and servicing.
| Specification | Detail |
|---|---|
| Model Number | OQB-3706F (Product Type: 056DF01) |
| Brand | Noritz |
| Type | Oil Water Heater (Hot Water Only), Direct Pressure Type |
| Installation Location | Indoor / Outdoor Compatible, Floor Standing |
| Heating Capacity | 30,000 kcal |
| Product Dimensions (W x D x H) | 27 cm x 57.5 cm x 79 cm (approx. 10.6 in x 22.6 in x 31.1 in) |
| Product Weight | 40 kg (approx. 88 lbs) |
| Color | White |
| Exhaust Pipe Diameter | φ106 mm |
| Air Supply Pipe Diameter | φ106 mm |
| Max Exhaust Extension | 7 meters with up to 3 bends |
| Included Accessories | Exhaust pipe top, rubber oil supply pipe, rubber oil supply pipe clamp band, oil connection pipe, takenoko pipe set, operation panel cover, cosmetic cover, mounting parts set. |
| First Available Date | May 17, 2021 |
7. Warranty Information
Noritz products are manufactured to high-quality standards and come with a manufacturer's warranty. The specific terms and duration of the warranty are detailed in the warranty card included with your product.
Important Warranty Condition: Please be aware that failures or damages to the unit resulting from installations that do not meet the specified conditions and guidelines outlined in the installation manual and this instruction manual will be subject to paid repair, even if the unit is still within its warranty period. Always ensure installation is performed by a qualified professional according to all Noritz guidelines and local regulations.
For warranty claims or to understand the full terms and conditions, please refer to your warranty documentation or contact Noritz customer support.
8. Support and Contact Information
For technical assistance, service requests, or any inquiries regarding your Noritz OQB-3706F oil water heater, please contact our support center.
- Noritz Contact Center: 0120-911-026
- Online Support: Visit the official Noritz website for FAQs, additional manuals, and online support options.
When contacting support, please have your product model number (OQB-3706F) and serial number ready for faster service.
