INSTALLATION
14 Copyright © 2009 Mastervolt / October 2009 / WHISPER 3.5 / EN
Connection of an emergency stop / fire alarm switch
To connect an emergency stop button or to stop the
generator automatically in case of a fire alarm, you can
use the bypass connection between wires 13 and 14 that
come from the The Digital Diesel Control Panel.
See fig. 19. To do so, remove the top cover plate of the
connection box to get access to the wiring loom.
Figure 19: Location of the connection box
Disconnect the bypass between wires 13 and 14 and then
replace it by an emergency switch or a potential free fire
alarm switch with normally closed contacts (figure 20).
Fig. 20: Connection for emergency stop / fire alarm switch
2 STARTER BATTERY
For starting, the Whisper requires a 12V starter battery
with the following capacity:
Model Minimum capacity
Whisper 3.5 55Ah
The generating set can be connected with the main engine
battery or have its own battery. We strongly recommend
the use of a separate battery for the generating set and to
keep the wiring system for the propulsion engine and the
domestic DC supply system completely separate and
individually connected to separate batteries.
Figure 21: Installation of a starter battery
However, the negative of all the batteries on the vessel
should be interconnected (when on earth) to avoid
difference in the voltage level of the earth on different
places causing trouble to electronic devices which might
be in the system.
The above recommendation is not valid for ships having
the starter battery of the propulsion engine or other
auxiliary equipment positive grounded. When this is the
case an expert should be consulted.
A battery switch may be used.
The starter battery is charged by the standard internal
charger in the alternator. An additional battery charger will
help to keep the battery in good condition when the
generating set is not used. A battery charger is not
included in the standard supply. A high efficiency battery
charging unit can be ordered from Mastervolt which is able
to charge both the ship’s main battery and the starter
battery. Also a small charger can be used to charge the
starter battery only, such as the IVO SMART 12/10.
Normal operation
Alarm / emergency
13
14
230VAC
IVO 12/10
A
B
12V
Top cover plate of
the connection box
Digital Diesel
Control Panel
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