Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Noritz GQ-2437WX gas water heater. Please read this manual thoroughly before installation and use, and keep it for future reference. This model is designed for city gas use and outdoor wall-mounted installation, providing hot water only.
Important Safety Information
Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation and operating instructions thoroughly before installing or servicing this equipment.
- Gas Type Compatibility: Always confirm that the gas water heater is compatible with the gas type indicated on its nameplate. Using an incompatible gas type can lead to serious hazards.
- Ventilation: Install the unit in a location with adequate ventilation. Ensure proper airflow to prevent the accumulation of harmful gases.
- Fire Safety: The installation location must be fire-safe, or effective fire prevention distances must be maintained from combustible materials. If sufficient distance cannot be maintained, fire prevention measures using a heat shield are mandatory.
- Leak Testing: After completing all gas connections, a thorough leak test must be performed by a qualified professional to ensure there are no gas leaks.
- Professional Installation: Installation and related work must be performed by qualified professionals in accordance with all applicable laws, regulations, 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
- Gas Appliance Installation Standards and Practical Guidelines (issued by the Japan Gas Appliances Inspection Association)
- Self-Arrangement of Installation: Customers are responsible for arranging the installation of the equipment and any related construction work.
- Required Parts: Any parts not included with the product must be prepared by the customer.
Setup and Installation
This section outlines the general setup and installation requirements. Refer to the detailed installation manual provided with the product for complete instructions.
Installation Diagrams
The following diagram illustrates the general dimensions and connection points for the Noritz GQ-2437WX gas water heater. All measurements are in millimeters unless otherwise specified.
Figure 1: Overall Installation Diagram for Noritz GQ-2437WX Gas Water Heater. This diagram shows the dimensions, connection points for gas, water supply, hot water output, and electrical conduit, as well as mounting hole positions. It also includes detailed views of the alcove exhaust cover and various connection points.
Mounting Specifications
| Fixing Location | Material Specifications (Attached Parts) | Installation Type | Tensile Strength |
|---|---|---|---|
| Wooden Wall Fixing | Round wood screw (JIS) 4.8x38 | Wall-mounted | 0.3N/screw or more (15mm wood base) |
| Wooden Wall Fixing | Round wood screw (JIS) 4.8x38 | Mounted (upper part fixed) | 0.2N/screw or more (12mm wood base) |
| RC/ALC Wall Fixing | Fischer plug SX 6x30 | Wall-mounted | 0.3kN/screw or more (combined with screw and plug) |
| PS Fixing | Small screw M5x12 | Mounted (upper part fixed) | 0.5/screw or more |
Note: Measures for preventing product installation and overturning must comply with Ministry of Land, Infrastructure, Transport and Tourism Notification No. 1447, "Partial Revision of Matters Concerning Structural Strength and Safety of Building Equipment."
Connection Ports
- Water Supply/Hot Water Connection: R3/4 (20A)
- Gas Connection: City Gas: R1/2 (15A) (TU connectable)
- Electrical: AC100V (50/60Hz)
Operating Features
The Noritz GQ-2437WX gas water heater is equipped with several features to enhance user convenience and efficiency:
- Auto-Stop: Automatically stops hot water supply once a preset volume or time is reached, preventing overflow and conserving water.
- Q Function: Provides stable hot water temperature even with fluctuating water pressure or flow rates.
- Low Temperature Hot Water Output: Allows for precise control and output of hot water at lower temperatures, suitable for various uses.
- Power Saving Mode: Optimizes energy consumption during standby or low usage periods to reduce electricity costs.
- Turbo Hot Water: Delivers hot water rapidly when a quick increase in temperature or volume is needed.
- SKB Compatible: (Specific compatibility, refer to detailed manual for integration).
- QU-1 Compatible: (Specific compatibility, refer to detailed manual for integration).
Note: Remote controls are sold separately and are required for full functionality and control of these features.
Technical Specifications
Below are the detailed technical specifications for the Noritz GQ-2437WX gas water heater, based on JIS S 2075 and JIS S 2109 performance values.
| Item | Specification |
|---|---|
| Model | GQ-2437WX (BL) / GQ-2437WX |
| Applicable Gas Type | 12A, 13A, LPG (This product is low NOx specification) |
| Installation Method | Outdoor wall-mounted, PS standard installation type |
| Exhaust Method | Forced exhaust type (push-in) |
| Ignition Method | Electronic igniter direct ignition |
| Operating Water Pressure | 98.1~981kPa (1.0~10.0kgf/cm²) |
| Minimum Operating Flow Rate/Pressure | 2.7L/min, 9.81kPa (0.1kgf/cm²) |
| External Dimensions (H x W x D) | 520mm x 350mm x 170mm |
| Weight (Main Unit) | 17kg (18kg when full of water) |
| Connection Port Diameter (Water Supply/Hot Water) | R3/4 (20A) |
| Connection Port Diameter (Gas) | City Gas: R1/2 (15A) (TU connectable) |
| Electrical | AC100V (50/60Hz) |
| Power Consumption | 46W (Freeze prevention heater: 125W) |
| Standby Power Consumption | 2.7W |
| Power Cord Length | Approx. 1.8m |
| Main Unit Exterior Material | Zinc-plated steel sheet, powder coating |
| Heat Exchanger Material | Copper plate, copper pipe |
| Main Unit Exterior Color | GQ White (Approximate color: Munsell No. 9.3YR 8.4/1.0) |
| Energy Consumption Efficiency | 80.9% (Mode) |
| Noise Level | 48dB or less (Hot water supply: measured in an anechoic chamber) |
| Exhaust Temperature | 260°C or less |
| Safety Devices | Flame failure safety device (flame rod), overheat prevention device (temperature fuse), residual flame safety device (bimetal switch), overpressure prevention safety device (spring type), freeze prevention device (drain plug/electric heater), dry-fire safety device (bimetal switch), induction current protection device (ZNR), leakage safety device |
| Accessories | Mounting screws, instruction manual (with warranty), construction manual |
| Optional Parts (Sold Separately) | Kitchen remote control RC-7507M-3, Bathroom remote control RC-7507S-3, Extension remote control RC-8001A/RC-8001B, Remote control cords M,S, Instant hot water unit QU-1, SKB-200P, Extension power unit, Pipe cover H33-K, Mounting stand D30, Wall bracket reinforcement plate CRP SET, GQ insulation SET, Rack-mounted wall bracket CRP, Exhaust cover C52, Alcove exhaust cover L18, PS frame SET PK-D350~D480 |
Note: Specifications are subject to change without prior notice for improvement.
Capacity Table
| Item | Standard Gas | Max Capacity | Min Capacity |
|---|---|---|---|
| Heat Output | City Gas | 50.0kW (43,000kcal/h) | 6.51kW (5,600kcal/h) |
| Consumption | LPG | 50.0kW (3.57kg/h) | 6.51kW (0.47kg/h) |
| Hot Water Output (Water Temp +25°C) | 24 L/min | ||
| Hot Water Output (Water Temp +40°C) | 15 L/min | ||
| Hot Water Supply Capacity | 3.0~24 units | ||
| Hot Water Temperature Adjustment Range | 32, 35, 37~48, 50, 55, 60, 75°C (18 levels) |
Note: Gas consumption (city gas) and hot water output values are for gas type 13A. Values may vary slightly depending on the gas type.
Hot Water Supply Time to Bathtub
| Season | Temperature Rise | 160L (1 person bathtub) | 180L (1.5 person bathtub) | 210L (2 person bathtub) |
|---|---|---|---|---|
| Winter | 8°C → 43°C | Approx. 9 min | Approx. 11 min | Approx. 12 min |
| Spring/Autumn | 18°C → 43°C | Approx. 7 min | Approx. 8 min | Approx. 9 min |
| Summer | 28°C → 43°C | Approx. 5 min | Approx. 6 min | Approx. 7 min |
Note: Values are for gas type 13A. Values may vary slightly depending on the gas type.
Maintenance
Regular maintenance ensures the longevity and safe operation of your gas water heater. While specific maintenance procedures should be performed by qualified service personnel, general care includes:
- Exterior Cleaning: Periodically wipe the exterior of the unit with a soft, damp cloth. Avoid abrasive cleaners or solvents.
- Ventilation Check: Ensure that the exhaust and air intake ports are clear of obstructions (e.g., leaves, debris, snow). Blockages can impair performance and pose safety risks.
- Professional Inspection: It is recommended to have the unit inspected by a qualified service technician at least once a year to check for wear, leaks, and proper operation of safety devices.
- Drain Plug: The unit includes an overpressure prevention safety device and drain plug (with filter). Consult the detailed installation manual for proper handling and any necessary draining procedures, especially in freezing conditions.
Troubleshooting
If you experience issues with your Noritz GQ-2437WX gas water heater, consider the following general points before contacting a service professional:
- No Hot Water:
- Check if the gas supply is open.
- Ensure the power supply to the unit is on.
- Verify that the water supply is open and there is sufficient water pressure.
- Check if any error codes are displayed on the remote control (if installed).
- Insufficient Hot Water:
- Confirm the hot water temperature setting on your remote control.
- Ensure the water flow rate is not exceeding the unit's capacity.
- Unusual Noises or Odors:
- If you detect a gas odor, immediately turn off the gas supply, open windows, and contact your gas company and a qualified service technician. Do not operate any electrical switches or appliances.
- Unusual noises may indicate a mechanical issue. Discontinue use and contact a service professional.
For any issues that cannot be resolved by these basic checks, or for complex problems, always contact a qualified Noritz service technician or your gas provider. Do not attempt to repair the unit yourself.
Warranty and Support
Your Noritz GQ-2437WX gas water heater comes with a manufacturer's warranty. Please refer to the warranty card included with your product for specific terms and conditions, including the warranty period and coverage details.
- Warranty Exclusions: Please be aware that failures and damages caused by installation that does not comply with the specified conditions and guidelines will be subject to paid repair, even if they occur within the warranty period.
- Product Orders: As this is a made-to-order product from the manufacturer, cancellations, returns, or exchanges due to customer convenience after ordering cannot be accepted.
- Construction Delays: Compensation for construction delays caused by product delays cannot be provided. Your understanding is appreciated.
- Customer Support: For technical support, service requests, or inquiries regarding your product, please contact Noritz customer service or an authorized service provider. Contact information can be found on the Noritz website or in your product documentation.
