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Installation Manual
Bosch Tronic 6100 C Electric Tankless Water Heaters - BTC 724001301 A (08.2022)
7.8 Wiring Diagrams
7.8.1 Power Supply Wiring for 18 and 27kW
Figure 11
Terminal Block in Unit
L1 L2
V042
V042
V042
Unit requires 10 AWG for 18kW, 8 AWG for 27kW wire with ground - one for each 240 V circuit.
L1 L2
L1 L2
L1 L2
L1 L2 L1 L2
Grounding Block in Unit
Internal PCB Dip Switches
The internal PCB dip switch #4 can be moved to switch between Fahrenheit and
Celsius on the external display. See Figure 12. No other dip switches should be
altered.
WARNING: ELECTRICAL HAZARD
Before changing the dip switch setting all power to the
water heater must be turned off at the circuit breakers
otherwise the setting change will not be activated.
NOTICE: PRODUCT DAMAGE
Do not alter or change the position of dip switches #1,#2 or
#3. These are used for factory programming.
Dip switch #4 may be adjusted to set display to °C.
Figure 12
1234
ON
DIP
DO NOT
CHANGE
POSITION OF
DIP SWITCHES
USE DIP SWITCH
#4 TO SWITCH
BETWEEN
FAHRENHEIT
AND CELSIUS
FAHRENHEIT = ON
CELSIUS = OFF
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