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Troubleshooting Guide
Electric Tankless Water Heaters
TRONIC 4000 C
TR4000C-3 | TR4000C-6 | TR4000C-8 | TR4000C-10
WARNING:
Improper installation, adjustment, alteration,
service or maintenance can cause injury, death, or
property damage.
NOTICE:
The manufacturer reserves the right to make
product changes or updates without notice and will
not be held liable for typographical errors in
literature.
®
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Table of Contents
Related Manuals for Bosch TRONIC 4000 C Series
Summary of Contents for Bosch TRONIC 4000 C Series
- Page 1 Troubleshooting Guide Electric Tankless Water Heaters TRONIC 4000 C TR4000C-3 | TR4000C-6 | TR4000C-8 | TR4000C-10 WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury, death, or property damage. NOTICE: The manufacturer reserves the right to make product changes or updates without notice and will not be held liable for typographical errors in literature.
- Page 2 Troubleshooting Guide Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024)
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Page 3: Table Of Contents
1 Key to Symbols and Safety Instructions 1.1 Key to Symbols 1.2 Safety 2 Key Components 3 Technical Specifications 4 Wiring Diagram 5 Troubleshooting 5.1 No Hot Water 5.2 Water Not Hot Enough Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024) -
Page 4: Key To Symbols And Safety Instructions
NOTICE is used to address practices not related to personal injury. Important information The info symbol indicates important information where there is no risk to people or property. Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024) -
Page 5: Key Components
Thermal Cutout (Auto Reset) - TR4000C-10 only Power Selector Thermal Cutout (Manual Reset) Hot Water Outlet Canister/Heating Element Cold Water Inlet Flow Sensor Inlet Filter Relay Terminal Block Check Valve Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024) -
Page 6: Technical Specifications
Maximum Flow Rate (GPM) Temperature Rise Δt TR4000C-3 TR4000C-6 TR4000C-8 TR4000C-10 35°F 0.59 1.26 1.65 2.04 45°F 0.50 0.98 1.28 1.59 77°F 0.29 0.57 0.75 0.93 Table 2 Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024) -
Page 7: Wiring Diagram
Relay Relay 42°C Switch 0- Off 1- Low Switch 2- Medium 3- High TR4000C-10 (240V) Heating element Relay 85°C Flow sensor 85°C Relay 42°C Switch 57°C Figure 2 Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024) -
Page 8: Troubleshooting
(see figure 10) Is the Clean out water inlet clean and check again and can the float move freely? Replace the water inlet assembly Part Number: 8733958121 Figure 3 Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024) - Page 9 TR4000C-6 | TR4000C-8 | TR4000C-10 Ground Check #1 TR4000C-6 | TR4000C-8 | TR4000C-10 Terminal block Figure 4 Check #2 Check #3 If voltage is within range, check your breaker. Figure 5 Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024)
- Page 10 Make sure the flow meter is installed correctly and connected to the Figure 6 cold water supply inlet. Ensure inlet is fully tightened and sensor is securely fastened. Figure 8 10 | Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024)
- Page 11 If the float is stuck, replace the flow meter relay • Flow meter connection on relay. reed. Magnet • Flow meter connection on canister. Figure 10 Figure 9 Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024) | 11...
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Page 12: Water Not Hot Enough
(see figure 14) We recommend that the unit be replaced with a higher capacity model that is suitable for the application. Figure 11 12 | Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024) - Page 13 The resulting number is the water flow rate in gallons per minute. Calculate delta T rise from the inlet temperature and outlet temperature. Compare the flow rate and delta T to values in table 2. Figure 13 Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024) | 13...
- Page 14 Alternatively, please visit our Service & Support webpage to find FAQs, videos, service bulletins, and more; www.boschheatingcooling.com/service or use your cellphone to scan the code below. Figure 15 14 | Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024)
- Page 15 Troubleshooting Guide NOTES: Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722202301 A (11.2024) | 15...
- Page 16 United States and Canada Bosch Thermotechnology Corp. 65 Grove St. Watertown, MA 02472 Tel: 800-283-3787 www.bosch-homecomfort.us BTC 722202301 A / 11.2024 Bosch Thermotechnology Corp. reserves the right to make changes without notice due to continuing engineering and technological advances.
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