Introduction
This manual provides essential information for the safe and efficient use of your Noritz GT-1651SAWX-FFA-2BL Gas Water Heater. This 16-number unit is designed for indoor wall-mounted installation with a forced exhaust system, suitable for City Gas (12A, 13A). Please read all instructions carefully before installation and operation.
Image: Noritz GT-1651SAWX-FFA-2BL Gas Water Heater, front view.
Safety Information
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment.
General Safety Precautions:
- Always ensure the gas type indicated on the appliance nameplate matches your gas supply (City Gas 12A, 13A).
- Install the appliance in a location with sufficient ventilation. Ensure adequate ventilation for all gas appliances in the same room.
- The walls surrounding the appliance must be fire-safe. Maintain fire-safe distances from combustible materials. If fire-safe distances cannot be maintained, use a heat shield for fire protection.
- After gas connection, always perform a leak test to prevent gas leaks.
- Installation and related work must be performed by qualified personnel in accordance with 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', 'Prefectural Ordinances', 'Fire Service Law', 'Gas Business Law', 'Liquefied Petroleum Gas Law', and 'Gas Appliance Installation Standards and Practical Guidelines'.
- Do not attempt to install or repair the unit yourself if you are not qualified.
- Faults and damages resulting from installation that deviates from specified conditions will incur paid repairs, even within the warranty period.
Installation
The Noritz GT-1651SAWX-FFA-2BL is an indoor wall-mounted, forced exhaust type gas water heater. Proper installation is critical for safety and performance.
Installation Requirements:
- Gas Type: For City Gas (12A, 13A).
- Mounting: Indoor wall-mounted.
- Exhaust Method: Forced exhaust type (push-in).
- Power Supply: AC100V (50/60Hz).
Connection Details:
- Water Supply/Hot Water Connection: R1/2 (15A) or R3/4 (20A).
- Gas Connection: R1/2 (15A) (TU connection possible).
- Bath (Flow/Return) Connection: R1/2 (15A).
- Electrical Conduit Connection: C31.
Circulation Pipe Installation:
The maximum length for circulation pipe installation is 25 meters for Ø12.7 copper pipes (with up to 10 bends) or Ø10 resin pipes (with an inner diameter of 8 or more). For lengths between 15-25 meters, use a circulation adapter HX series and adjust settings according to the installation manual.
- Upper Limit: The circulation pipe must be within 7 meters from the bottom of the appliance to the overflow edge of the bathtub.
- Lower Limit: The circulation pipe must be within 2 meters from the bottom of the appliance to the circulation adapter.
- If there are obstacles in the path of the circulation pipe, ensure it is within 3 meters and at one location.
Exhaust Pipe Installation:
The exhaust pipe extension must use a specified exhaust pipe top. Installation should be within 1 to 3 bends and within 7 meters. The exhaust pipe diameter is Ø80-Ø120, double pipe.
Image: Technical diagram showing dimensions, connection points, and circulation pipe installation guidelines. Refer to this diagram for precise measurements and connection types.
Operating Instructions
The Noritz GT-1651SAWX-FFA-2BL offers various functions for comfortable hot water supply and bathing.
Key Features:
- Auto Function: Automatically fills the bathtub to a preset level and maintains the temperature.
- Mild Reheating: Gently reheats bathwater to a comfortable temperature.
- Bath Insulation: Maintains bathwater temperature for extended periods.
- Reheating: Reheats the bathwater.
- Hot Water Addition: Adds hot water to the bathtub.
- Water Addition: Adds cold water to the bathtub.
- Boiling Reservation: Allows you to set a time for the bath to be ready.
- Q Function: Provides stable hot water supply even with fluctuating water pressure.
- Low-Temperature Hot Water Output: Delivers hot water at lower temperatures for specific needs.
- Power-Saving Mode: Optimizes energy consumption.
- Turbo Hot Water: Provides a quick boost of hot water.
- Bath Cleaning/Automatic Drain Valve: Facilitates easy cleaning and draining of the bathtub.
Note: Remote control units are sold separately and are required to access and control many of these advanced features.
Maintenance
Regular maintenance ensures the longevity and safe operation of your gas water heater.
Routine Checks:
- Inspection Notification: The unit may display an inspection notification after a certain period of use. Follow the instructions in the remote control manual or contact a qualified service technician for scheduled inspections.
- Bath Cleaning: Utilize the 'Bath Cleaning/Automatic Drain Valve' function for easy cleaning of the bathtub.
- External Cleaning: Keep the exterior of the unit clean. Use a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Frost Prevention: The unit is equipped with a frost prevention device. Ensure the power supply is not interrupted during cold weather to allow this feature to operate.
For any complex maintenance or repairs, always contact a qualified Noritz service technician.
Troubleshooting
If you encounter issues with your gas water heater, please refer to the following basic troubleshooting steps. For persistent problems, contact a qualified service technician.
Common Issues:
- No Hot Water: Check if the gas supply is open and if the power supply to the unit is active. Ensure the remote control is set to the desired temperature and mode.
- Error Codes: If an error code appears on the remote control, consult the remote control manual for specific meanings and solutions.
- Low Hot Water Pressure: Check your household water pressure. Ensure all water valves are fully open.
- Unusual Noises: If you hear unusual noises, turn off the unit and contact a service technician immediately.
WARNING: Do not attempt to repair gas or electrical components yourself. This can lead to serious injury or property damage.
Specifications
| Item | Specification |
|---|---|
| Product Name | GT-1651SAWX-FFA-2BL 15A (20A) |
| Model Type | 12A, 13A, LPG (City Gas 12A, 13A for this model) |
| Installation Method | Indoor Wall-Mounted |
| Exhaust Method | Forced Exhaust Type (Push-in) |
| Ignition Method | Spark Ignition |
| Hot Water Capacity Control | FF+FB+Water Proportional Control (Water Servo) + Q Function |
| Required Water Pressure | 0.1~1.0MPa (1.0~10.0kgf/cm²) |
| Minimum Operating Flow/Pressure | 3.5L/min 10kPa (0.1kgf/cm²) |
| External Dimensions (H x W x D) | 690mm x 464mm x 271mm |
| Weight (Main Unit) | 34kg (35.5kg when full) |
| Water Supply/Hot Water Connection | R1/2 (15A) R3/4 (20A) |
| Gas Connection | R1/2 (15A) (TU connection possible) |
| Bath (Flow/Return) Connection | R1/2 (15A) |
| Power Supply | AC100V (50/60Hz) |
| Power Consumption | 180/210W (Frost Prevention Heater: 135W) |
| Standby Power Consumption | 3.3W |
| Power Cord Length | Approx. 1.8m |
| Main Unit Exterior Material | Galvanized steel sheet, powder coated |
| Heat Exchanger Material | Copper plate, copper pipe |
| Exterior Color | GQ White (Approximate Munsell No. 9.3YR8.4/1.0) |
| Noise Level (Max. A-range) | 48dB or less (Hot water supply + Reheating, measured in an anechoic chamber) |
| Safety Devices | Flame failure, Overheat prevention, Residual flame, Overpressure prevention, Frost prevention, Leakage current, Fan rotation detection, Overcurrent prevention, Dry-burn prevention, Power outage, Lightning surge protection, Backflow prevention |
| Manufacturer Model Number | 0142B17 |
| ASIN | B0D788YQL7 |
Hot Water Supply Capacity (JIS S 2075, JIS S 2109):
| Item | Min. Capacity | Max. Capacity |
|---|---|---|
| Standard Gas (City Gas) | 34.9kW (30,000kcal/h) | 5.58kW (4,800kcal/h) |
| Consumption (LPG) | 34.9kW (2.49kg/h) | 5.58kW (0.4kg/h) |
| Hot Water Output (+25°C) | 16L/min | 2.5-16 numbers |
| Hot Water Output (+40°C) | 10L/min | |
| Hot Water Temperature Range | 32°C, 35°C, 37~48°C (1°C increments), 50, 55, 60°C (17 settings) | |
| Standard Gas Consumption | 11.6kW (City Gas: 10,000kcal/h, LPG: 0.83kg/h) | |
| Minimum Operating Flow | 3.5L/min | |
| Bath Temperature Range | 33~48°C (1°C increments, 16 settings) | |
| Max Gas Consumption (during 4 hours) | 46.5kW (City Gas: 40,000kcal/h, LPG: 3.32kg/h) | |
Note: Gas consumption and hot water output values are for Gas Type 13A and may vary slightly depending on the gas type.
Bath Reheating Performance:
| Temperature Rise | 160L (1-person bath) | 180L (1.5-person bath) | 210L (2-person bath) |
|---|---|---|---|
| Water Temp +10°C Rise | Approx. 13 min | Approx. 14 min | Approx. 17 min |
Bath Water Addition Performance:
| Temperature Rise | 160L (1-person bath) | 180L (1.5-person bath) | 210L (2-person bath) |
|---|---|---|---|
| 18°C to +43°C | Approx. 13 min | Approx. 14 min | Approx. 16 min |
Conditions: Bath piping one way 3 bends 6m, Ø12.7 system tube, water supply pressure 245kPa = 2.5kgf/cm² or more. Values are for Gas Type 13A and may vary slightly depending on the gas type.
Warranty & Support
Noritz provides a warranty for its products. However, please be aware of the following:
- Faults and damages caused by installation that deviates from the specified conditions in this manual will result in paid repairs, even if they occur within the warranty period.
- Customers are responsible for arranging the installation and related work for the appliance.
- Parts not included with the product must be prepared by the customer.
- Noritz cannot compensate for construction delays caused by product delays.
For warranty claims, technical support, or to schedule service, please contact your authorized Noritz dealer or a qualified service technician. Always provide your model number (GT-1651SAWX-FFA-2BL) and serial number when seeking support.
