Alpha Pro charge regulator – User and Installation Manual
4.2.2 Reg on
The "reg on" wire should be interrupted with a relay or an ungrounded oil pressure switch. If you use a relay, this
relay can be powered from the ignition switch.
CAUTION!
The "reg on" wire should run to the positive pole of the battery being charged, as this is also the voltage
measurement for the regulator. Otherwise, the batteries may be overcharged and damaged. See
Figure 8.
If the engine is not running switch "S1" must be open, otherwise the field windings of the alternator will
be damaged due to overheating by lack of cooling-air flow.
Best option - Oil pressure switch + relay
Option 2 - Relay + ignition switch
Option 3 - Oil pressure switch
1 Brown wire
2 Ignition switch
3 Relay
4 Positive battery pole of the battery being charged
5 Normally open oil pressure switch
Figure 8: Connection options
4.2.3 Connection of the battery temperature sensor (included)
Attach the temperature sensor on the battery and connect to the Alpha Pro charge regulator as indicated.
Notes: - If there are multiple batteries, attach the sensor to
the main battery, or to the one that will run the
warmest.
- High temperatures are destructive to batteries. If
your batteries are regularly subjected to tempera-
tures above 30°C [100°F], you should relocate
them or supply forced fresh air ventilation.
- Lithium-ion batteries do not require the external
temperature sensor or temperature compensation!
Figure 9: Installation of the battery temperature sensor
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