Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Bosch Greentherm C 1050 ES NG Tankless Water Heater. Please read these instructions thoroughly before attempting any installation, operation, or maintenance procedures. Retain this manual for future reference.
Figure 1: Bosch Greentherm C 1050 ES NG Tankless Water Heater. This image displays the front of the unit, highlighting its sleek gray design and the integrated digital control panel at the lower section, which shows a temperature reading of 120°F.
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 by a qualified professional in accordance with all local codes and regulations.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
- Ensure proper ventilation is maintained around the unit.
- Never attempt to repair or service the unit yourself unless specifically instructed by this manual or a qualified technician.
- Turn off the gas supply and electrical power to the unit before performing any maintenance or service.
Setup and Installation
Installation of the Bosch Greentherm C 1050 ES NG Tankless Water Heater requires specialized knowledge and should only be performed by a licensed professional. This section provides general guidelines.
Pre-Installation Checks
- Verify that the unit received is the correct model (C 1050 ES NG) and is designed for Natural Gas.
- Inspect the unit for any shipping damage. Do not install a damaged unit.
- Ensure the installation location meets all clearance requirements for ventilation and service access.
Key Installation Considerations
- Gas Supply: The unit requires a natural gas supply. Ensure the gas line size is adequate for the 199,000 BTU max input.
- Water Connections: Proper hot and cold water line connections are crucial. Install shut-off valves and a pressure relief valve as required by local codes.
- Venting: This model utilizes concentric up-and-out venting. Proper venting is critical for safety and efficiency. Consult the detailed installation guide for specific requirements.
- Electrical Connection: The unit requires an electrical connection for its controls and ignition system.
Operating Instructions
Once installed by a qualified professional, operating your tankless water heater is straightforward.
Initial Startup
- Ensure all water and gas connections are secure and leak-free.
- Open the cold water supply valve to the unit.
- Open a hot water faucet in your home to purge air from the water lines. Close the faucet once water flows steadily.
- Turn on the gas supply to the unit.
- Restore electrical power to the unit. The display panel should illuminate.
Temperature Adjustment
The desired hot water temperature can be set using the controls on the front display panel. Refer to Figure 1 for the location of the display and controls.
- Press the '+' or '-' buttons to increase or decrease the set temperature.
- The current set temperature will be displayed on the digital screen.
- Allow a few moments for the unit to adjust to the new setting.
Normal Operation
When a hot water faucet is opened, the unit will automatically detect water flow and begin heating. Hot water will be delivered continuously at the set temperature, thanks to the automated and fully modulating bypass system.
Maintenance
Regular maintenance ensures the longevity and efficient operation of your Bosch Greentherm tankless water heater. Always turn off the gas and electrical supply before performing any maintenance.
Annual Maintenance (Recommended by a Qualified Technician)
- Descaling: Depending on water hardness, the heat exchanger may require descaling to remove mineral buildup. This is crucial for maintaining efficiency and preventing damage.
- Combustion Check: Verify proper combustion and vent system integrity.
- Gas Pressure Check: Ensure correct gas pressure is supplied to the unit.
- General Inspection: Check all connections, wiring, and components for wear or damage.
User Maintenance
- Inlet Water Filter: The unit is equipped with an easily accessible inlet water filter. Periodically inspect and clean this filter to prevent debris from entering the system. Refer to the full installation manual for specific instructions on accessing and cleaning the filter.
- Exterior Cleaning: Clean the exterior casing with a soft, damp cloth. Do not use abrasive cleaners or solvents.
Troubleshooting
This section provides solutions to common issues. For complex problems or error codes not listed, contact a qualified service technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water or inconsistent temperature. |
|
|
| Unit cycles on and off frequently. |
|
|
| Error code displayed on panel. | Specific malfunction detected by the unit. | Note the exact error code. Refer to the comprehensive service manual for a detailed explanation of error codes and their remedies. If unavailable, contact Bosch customer support or a certified technician, providing the error code. |
Specifications
Key technical specifications for the Bosch Greentherm C 1050 ES NG Tankless Water Heater:
- Model: C 1050 ES NG
- Power Source: Natural Gas
- Maximum Input: 199,000 BTU
- Energy Factor (Efficiency): 0.94
- Maximum Flow Rate: 10.5 Gallons Per Minute (GPM)
- Special Feature: Automated and fully modulating bypass for temperature stability.
- Venting: Concentric up-and-out venting.
- Color: Gray
- UPC: 052575108001
Warranty Information
The Bosch Greentherm C 1050 ES NG Tankless Water Heater comes with a manufacturer's warranty. The warranty period is typically 3 to 15 years, depending on the specific application and installation type. Please refer to the official warranty document included with your product or visit the Bosch website for complete terms and conditions. Keep your proof of purchase for warranty claims.
Support
For technical assistance, service, or to locate a certified Bosch service provider, please contact Bosch customer support. Have your model number (C 1050 ES NG) and serial number ready when contacting support.
You can also visit the official Bosch website for additional resources, FAQs, and to download the latest technical documentation and manuals.
Online Resources: Bosch Thermotechnology US
