1. Introduction
This manual provides essential information for the safe and efficient use of your Noritz GQ-2037WS-KB BL gas water heater. This model is a 20-liter, wall-mounted, hot water only unit with an auto-stop function, designed for propane gas. Please read this manual thoroughly before installation and operation, and keep it for future reference.
2. Important Safety Information
Professional Installation Required: Installation, mounting, and related work for this appliance must be performed by a qualified professional. Failures and damages resulting from installation outside specified conditions will be subject to paid repair even within the warranty period.
- Gas Type Verification: Always confirm that the gas type (Propane Gas for this model) matches the one indicated on the appliance's nameplate.
- Ventilation: Install the appliance in a location with adequate ventilation equipment, considering the gas consumption of this unit and any other gas appliances in the same room.
- Fire Safety Clearances: Ensure surrounding walls are fire-safe or that effective fire-safe clearances are maintained. Maintain fire-safe separation distances from combustible materials around the appliance. If adequate separation cannot be achieved, use a heat shield for fire protection.
- Leak Test: Always perform a gas leak test after gas connection is complete.
- Compliance: Installers must adhere to all applicable laws and standards, including but not limited to: Technical Standards for Electrical Equipment, Electricians' Act, Internal Wiring Regulations, Electrical Appliance and Material Safety Act, Building Standards Act, Municipal Ordinances, Fire Service Act, Gas Business Act, Liquefied Petroleum Gas Act, and Gas Appliance Installation Standards and Practical Guidelines.
- Required Parts: Please prepare any parts not included with the product yourself.
3. Product Overview
The Noritz GQ-2037WS-KB BL is a compact, high-efficiency gas water heater designed for wall-mounted outdoor installation. It provides hot water on demand with an auto-stop feature for convenience.
Image 3.1: Noritz GQ-2037WS-KB BL Gas Water Heater main unit.
Dimensions and Connections
Refer to the technical drawing below for detailed dimensions and connection points. The unit measures 520mm (Height) x 350mm (Width) x 170mm (Depth).
Image 3.2: Detailed technical drawing showing dimensions, connection points (gas, water supply, hot water, electrical conduit, ground screw), and internal components of the Noritz GQ-2037WS-KB BL gas water heater. Key dimensions include a width of 350mm, height of 520mm, and depth of 170mm. Connection diameters for water supply, hot water, and gas are R1/2 (15A).
- Gas Connection: R1/2 (15A)
- Water Supply/Hot Water Connection: R1/2 (15A)
- Electrical Connection: AC100V (50/60Hz)
4. Setup and Installation
Installation of this gas water heater requires specialized knowledge and tools. It must be performed by a qualified professional in accordance with all local and national regulations.
Installation Steps (Overview for Qualified Installers):
- Site Selection: Choose an outdoor, wall-mounted location that meets all clearance requirements for fire safety and ventilation. Ensure the location is suitable for the appliance's dimensions.
- Mounting: Securely mount the appliance using mounting box type III, IV, or V, as specified. Use the included mounting screws.
- Gas Connection: Connect the propane gas supply line to the R1/2 (15A) gas inlet. Perform a leak test immediately after connection.
- Water Connections: Connect the water supply line and hot water outlet line to the R1/2 (15A) connections.
- Electrical Connection: Connect the unit to an AC100V (50/60Hz) power source. The power cord is not included and must be arranged on-site.
- Ventilation: Ensure the exhaust port is clear and unobstructed.
- Initial Check: Verify all connections are secure and free of leaks.
Note: Remote controls are sold separately and are not included with the main unit. Consult the remote control's manual for installation and pairing instructions.
5. Operating Instructions
This Noritz gas water heater is designed for hot water supply only with an auto-stop function. Operation is typically managed via a remote control (sold separately).
Key Functions:
- Auto-Stop: Automatically stops hot water supply once a preset volume or time is reached, preventing overflow.
- Notification Function: Provides audible or visual alerts for operational status or errors.
- Q Function: Optimizes hot water temperature stability, especially during changes in water flow.
- Power-Saving Mode: Reduces energy consumption during periods of inactivity.
- Solar Compatibility: The unit is solar compatible only for models without the auto-stop feature and when operated directly from the main unit. In this mode, the set temperature may not always be reached.
Basic Operation (with Remote Control):
- Power On/Off: Use the designated button on your remote control to turn the water heater on or off.
- Temperature Setting: Adjust the desired hot water temperature using the temperature control buttons on the remote. The temperature adjustment range is 37-48, 60, 75°C (14 levels).
- Hot Water Supply: Open a hot water faucet to initiate hot water flow. The unit will automatically ignite and heat the water to the set temperature.
- Auto-Stop Function: If your remote control supports it, you can set a specific volume for hot water delivery (e.g., for filling a bathtub). The unit will stop automatically once the set volume is dispensed.
6. Maintenance
Regular maintenance ensures the longevity and safe operation of your gas water heater. Always turn off the gas supply and electrical power to the unit before performing any maintenance.
- Exterior Cleaning: Wipe the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Drain Plug (Filter): The unit is equipped with a drain plug (filter). Periodically check and clean this filter to prevent blockages. Refer to the technical drawing (Image 3.2) for its location.
- Professional Inspection: It is recommended to have a qualified professional inspect the unit annually to ensure all components are functioning correctly and safely.
- Freeze Prevention: The unit includes a freeze prevention device (drain plug, electric heater). Ensure the unit remains powered during cold weather to allow this feature to operate.
7. Troubleshooting
If you experience issues with your water heater, refer to the following basic troubleshooting steps. For complex problems or if the issue persists, contact a qualified service technician.
- No Hot Water:
- Check if the gas supply is open.
- Verify the unit is powered on.
- Ensure the water supply valve is open.
- Check for error codes on the remote control (if applicable).
- Insufficient Hot Water:
- Confirm the set temperature on the remote control.
- Check if multiple hot water outlets are being used simultaneously, which might exceed the unit's capacity.
- Unusual Noises or Odors:
- Immediately turn off the gas supply and power to the unit.
- Contact a qualified service technician. Do not attempt to operate the unit.
- Leakage:
- Turn off the water supply and gas supply to the unit.
- Contact a qualified service technician.
Important: Do not attempt to repair the unit yourself. Always rely on qualified professionals for service and repairs.
8. Specifications
| Item | Specification |
|---|---|
| Product Name | Noritz Gas Water Heater |
| Model | GQ-2037WS-KB BL |
| Applicable Gas Type | Propane Gas (LPG), City Gas 12A, 13A |
| Installation Method | Outdoor, Wall-Mounted |
| Ventilation Method | Forced Exhaust (Push-in) |
| Ignition Method | Direct Ignition by Electronic Igniter |
| Operating Water Pressure | 98.1~981 kPa (1.0~10.0 kgf/cm²) |
| Minimum Operating Flow Rate/Pressure | 2.7 L/min, 9.81 kPa (0.1 kgf/cm²) |
| External Dimensions (H x W x D) | 520mm x 350mm x 170mm |
| Weight (Main Unit) | 15 kg (16 kg when full of water) |
| Connection Diameter (Water Supply/Hot Water/Gas) | R1/2 (15A) |
| Power Supply | AC100V (50/60Hz) |
| Power Consumption (12A, 13A / LPG) | 37W / 37W |
| Freeze Prevention Heater Power Consumption | 125W |
| Standby Power Consumption | 3.0W |
| Power Cord Length | None (Site arrangement required) |
| Main Unit Exterior Material | Galvanized Steel Plate, Powder Coating |
| Exhaust Port Material | Stainless Steel |
| Heat Exchanger Material | Copper Plate, Steel Pipe |
| Main Unit Exterior Color | GQ White (Munsell No. 9.3YR8.4/1.0) |
| Energy Consumption Efficiency (Mode) | 81.6% |
| Noise Level (Max, A-weighted) | 50 dB or less (Hot water supply: measured in an anechoic chamber) |
| Exhaust Gas Temperature | 260°C or less |
| Safety Devices | Flame Failure, Overheat Prevention, Residual Flame, Overpressure Prevention, Freeze Prevention, Earth Leakage, Induced Lightning Protection |
| Solar Connection | Not possible (Possible with main unit operation or non-auto-stop remote, but set temperature may not be reached) |
| Included Accessories | Set of Mounting Screws |
| Item | Max Capacity | Min Capacity |
|---|---|---|
| Standard Gas Consumption (City Gas) | 41.6 kW (35,800 kcal/h) | 5.58 kW (4,800 kcal/h) |
| Standard Gas Consumption (LPG) | 41.6 kW (2.98 kg/h) | 5.58 kW (0.40 kg/h) |
| Hot Water Output (Water Temp +25°C) | 20 L/min | |
| Hot Water Output (Water Temp +40°C) | 12.5 L/min | |
| Hot Water Supply Capacity | 2.5~20 units | |
| Hot Water Temperature Adjustment Range | 37~48, 60, 75°C (14 levels) | |
*Gas consumption (city gas), hot water output, and hot water supply capacity are based on Gas Type 13A values.
| Season | 160L (1 Person Bathtub) | 180L (1.5 Person Bathtub) | 210L (2 Person Bathtub) |
|---|---|---|---|
| Winter (8°C water temp) | Approx. 12 min | Approx. 14 min | Approx. 16 min |
| Spring/Autumn (18°C water temp) | Approx. 8 min | Approx. 9 min | Approx. 11 min |
| Summer (28°C water temp) | Approx. 8 min | Approx. 9 min | Approx. 11 min |
*Values are for Gas Type 13A. Actual times may vary slightly depending on gas type and installation conditions.
9. Warranty and Support
Warranty Limitations: Failures and damages resulting from installation outside specified conditions will be subject to paid repair even within the warranty period. This includes improper gas type connection, inadequate ventilation, insufficient fire safety clearances, or installation by unqualified personnel.
Customer Responsibility: Customers are responsible for arranging the installation, mounting, and related work for the appliance. Compensation for damages due to construction delays caused by product delays cannot be provided.
For service or support, please contact your authorized Noritz dealer or a qualified service technician.