Technical Information; Installation; Install Location - Bosch TRONIC 3000 US3-2R Installation Manual And Operating Instructions

3.3

Technical Information

Model Volts Amps
1)
US3-2R 110-120 15
US3-2R 110-120 30
US4-2R 208-240 9
US4-2R 208-240 19
US7-2R 208-240 15
US7-2R 208-240 30
US9-2R 208-240 20
US9-2R 208-240 40
1) Current draw for maximum voltage
2) Value is below the activation flow.
Table 3 Technical data and temperature rise information
The temperature rises are based on the higher voltage values
(i.e. 240 and 120): lower voltages will cause a lower
temperature rise.
To operate correctly the unit needs the following running water
pressures:
Model Running pressures
US 3 Minimum: 25 psi (1,7 bar)
US 4/7/9 Minimum: 10 psi (0,7 bar)
All models Maximum: 150 psi (10,3 bar)
Table 4 Water pressure requirements
Tronic 3000 – 6 721 803 545 (2020/02)
Element Loading (watts)
Resistance
Low
1x8 
1513 - 1800
2x8 
1x25 
1891 - 2250
2x25 
1x16 
3025 - 3600
2x16 
1x12 
3576 - 4760
2x12 
Temperature Rise (deg F) at Flow rate (GPM)
0.3 0.4
High
GPM GPM
41 31
3025 - 3600 82 61
2)
38
2)
3781 - 4500 76
2) 2)
2) 2)
6050 - 7200
2) 2)
2) 2)
7151 - 9521
4

Installation

DANGER:
Risk of electric shock!
▶ For safety reasons, disconnect the power supply to the
heater before any service or testing is performed.
WARNING:
▶ This heater must be electrically grounded in accordance
with the most recent edition of the National Electrical Code.
NFPA 70. In Canada, all electrical wiring to the heater must
be in accordance with local codes and the Canadian
Electrical Code, CSA C22.1 Part 1.
4.1

Install Location

NOTICE:
Appliance damage!
▶ The water heater must be mounted on a vertical wall or
surface and positioned with water and power connections
shown in Fig. 13.
Protection areas 1 and 2
▶ Do not install the heater in protection areas 1 and 2
( Fig. 4).
For high Rated Power
0.5 0.75 1.0 1.5
GPM GPM GPM GPM
24 16 12 8
49 33 24 16
31 20 15 10
61 41 31 20
2)
33 24 16
2)
65 49 33
2)
43 32 22
2)
86 65 43
Installation
2.0 2.5
GPM GPM
6 5
12 10
8 6
15 12
12 10
24 20
16 13
32 26
7