1. Introduction
Thank you for choosing the FOGATTI InstaGas Comfort 170 Series Tankless Water Heater. This unit is designed to provide efficient, on-demand hot water for your home or commercial needs. Please read this manual thoroughly before installation and operation to ensure safe and optimal performance.
This tankless water heater offers significant advantages over traditional tank heaters, including instant and endless hot water, energy savings by heating water only when needed, and a compact design that saves space.


2. 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.
This appliance must be installed in accordance with all local codes, or in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, and the National Electrical Code, ANSI/NFPA 70.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
Children should be supervised to ensure they do not play with the appliance. Keep children and pets away from the appliance area.
Caution: Hot water increases the risk of scald injury. Be aware of water temperature before use, especially when showering or using for other purposes. Refer to the operating instructions for temperature adjustment.
3. Product Overview
The FOGATTI InstaGas Comfort 170 Series tankless water heater features high-quality components designed for durability and efficient performance.


4. Specifications
| Feature | Specification |
|---|---|
| Brand | FOGATTI |
| Model Number | FDG-CF170G-NG |
| Product Dimensions | 16.3"W x 25"H x 7.3"D |
| Color | Gray |
| Wattage | 43 Watt-hours |
| Voltage | 120 Volts (AC) |
| Maximum Flow Rate | 7.5 Gallons Per Minute (GPM) |
| Heating Power | 170,000 BTU |
| Efficiency | Highly Efficient |
| Minimum Water Pressure | 15 PSI |
| Maximum Operating Pressure | 150 PSI |
| Mounting Type | Wall-Mounted |
| Certification | CSA Certified |
| Item Weight | 45.1 pounds |
| Country of Origin | China |
5. Installation
The FOGATTI InstaGas Comfort 170 Series is designed for quick and easy indoor installation. Ensure you have all necessary accessories and follow local plumbing and electrical codes.
5.1 Site Selection
Choose an indoor location that is protected from freezing temperatures and has adequate ventilation. The unit requires a standard 120V AC power outlet.

5.2 Connections
The unit features 3/4" NPT connections for water inlet, water outlet, and gas inlet. Ensure proper sealing and secure connections. A service valve kit (additional purchase) is recommended for easier maintenance.


6. Operation
The FOGATTI tankless water heater provides instant hot water with precise temperature control.
6.1 Digital Display and Controls
The unit features a sensitive digital display for convenient and precise operation. You can adjust the temperature using the controls on the front panel.

6.2 Temperature Control
With advanced water servo technology and temperature sensors, the unit precisely adjusts water flow and gas intake to maintain a temperature difference within ±1°F. The four-stage combustion system ensures consistent comfort.


6.3 Hot Water Delivery
The 7.5 GPM flow rate ensures a huge volume of hot water, capable of covering whole-body showers and meeting the demands of multiple outlets simultaneously.

7. Maintenance
Regular maintenance ensures the longevity and efficiency of your FOGATTI tankless water heater.
7.1 Anti-freeze Protection
The unit is equipped with an active heating anti-freeze device. However, if the environment temperature drops below 5°F or the unit will not be used for a long period, it is recommended to drain the water inside to prevent damage.

7.2 General Care
Periodically inspect the unit for any leaks or unusual noises. Keep the area around the water heater clear of obstructions. For optimal performance, it is recommended for use below 2000 feet altitude.
8. Troubleshooting
If you encounter issues with your water heater, refer to the following common problems and solutions. For complex issues, contact customer support.
8.1 No Hot Water / Intermittent Hot Water
- Check Water Flow: Ensure sufficient water pressure (15-150 PSI). Low water pressure can prevent the unit from activating or maintaining consistent heat.
- Gas Supply: Verify that the gas supply valve is fully open and there are no issues with your natural gas line.
- Power Supply: Confirm the unit is receiving continuous 120V AC power.
- Temperature Setting: Ensure the desired temperature is set appropriately on the digital display.
- Error Codes: Check the digital display for any error codes and consult the quick installation poster or full user manual for their meaning and resolution.
8.2 Unit Not Firing Up
- Ventilation: Ensure the exhaust vent is clear and unobstructed. Safety features may prevent operation if proper ventilation is not detected.
- Ignition: If you suspect an ignition issue, ensure the power supply is stable.
9. Warranty and Support
FOGATTI stands behind the quality of its products. The InstaGas Comfort 170 Series Natural Gas Tankless Water Heater includes:
- 2 years of full coverage for the entire unit.
- 5 years of coverage for the heat exchanger.
Our dedicated customer support team is available to assist you with any questions, concerns, or technical issues you may encounter. Please refer to the contact information provided on your warranty card or visit the official FOGATTI website for support details.





