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Installation Manual
Bosch Tronic TR4000C Electric Tankless Water Heaters- BTC 722203301 A (08.2022)
Table of Contents
1 Key to Symbols and Safety Instructions 4
1.1 Key to Symbols 4
1.2 Safety 4
2 Prepare the Water Heater 7
2.1 lnspection 7
2.2 Water Heater Rating Label Location 7
2.3 Clearances 7
2.4 Locating the Water Heater 7
2.4.1 Installation Area Operating Conditions 8
2.4.2 Freeze Protection 8
2.4.3 Choosing a Location 8
3 Water Quality Requirements 9
4 Water Heater Components 10
5 Dimensions 11
6 Technical Specifi cations 12
7 Installation 13
7.1 Wall Mounting the Water Heater 13
7.2 Plumbing 15
7.2.1 Pressure Relief Valve 15
7.2.2 Check Valve 16
7.2.3 Installation Example 16
7.3 Filling the Heater 17
7.4 Electrical Connection 17
7.4.1 Wiring Diagrams 18
8 Installation Checklist 19
9 Operation 20
9.1 Water Temperature Adjustment 20
10 Seasonal Operation 20
11 Maintenance 21
11.1 Removing the Cover 21
11.2 Draining the Heater 22
11.3 Checking the Inlet Filter 22
11.4 Removing a Heating Element
22
11.5 Descaling the Heating Element 23
12 Troubleshooting 24
12.1 Thermal Cutout 25
12.2 Testing the Heating Elements 26
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