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Electrical Connections - Bosch 940 ESO Instruction Manual

Suitable for heating potable water and space heating
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Electrical connections

8
Electrical connections
8.1
Electrical power supply
Warning:
For
disconnect the power supply cord to
the heater before any service or testing
is performed.
Warning:
This
electrically grounded in accordance
with the most recent edition of the
National Electrical Code. NFPA 70. In
Canada, all electrical wiring to the
heater should be in accordance with
local codes and the Canadian Electrical
Code, CSA C22.1 Part 1. Do not rely
on the gas or water piping to ground the
metal parts of the heater.
The water heater requires an electrical power supply
from a 120VAC / 60Hz properly rated receptacle and
must be properly grounded.
The heater is wired as shown in the wiring diagram
(chapter 13, Fig. 62).
Fig. 35
Note: Outlet appliance is plugged in to should be clear
from possible water damage.
26
safety
reasons,
heater
must
be
6720608643-15.1AL
1
8.2
Position of the fuses in control unit
To check fuses, proceed as follows:
B Remove the front cover, see Fig. 4, page 7.
B Remove the three screws on front of the control unit.
Fig. 36
B Pull control unit free to access and remove the six
screws from the back cover of the control unit, see
Fig. 37, pos. 2.
B Check the fuses in the printed circuit board, see Fig.
37, pos. 3.
2
3
Fig. 37 Location of fuses
B After verifying the fuses mount all parts in reverse
order.
1
6720608158-78.1AL
6 720 644 956

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