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Note: Because the sensing point for the relay trip is ahead of a blocking diode, set the
no-load trip-point 0.5 V higher than the required trip-point. For example, consider
an alarm is required when the output voltage drops to 23.0 V at the customer load
terminals. When making the trip-point adjustment at no-load conditions set it to
trip at 23.5 V, as measured at the customer load terminals. Under load conditions
when the voltage drops to 23.0 V, as measured at the customer load terminals,
the relay will trip.
Follow these steps to adjust the VSR set point:
a)
Remove both the positive and negative wires from the customer load terminals.
b)
Connect a DC voltmeter to the customer load terminals.
c)
Remove cover from the L/C.
d)
Set the output voltage to the desired alarm point value.
e)
Place an ohmmeter between the common and normally open contact of the VSR.
f)
Turn the VSR adjustment pot until the contacts open (the normally open contacts
are closed when output voltage is above VSR trip-point).
g)
Using the output voltage adjustment, raise output voltage to a value where the
VSR will reset.
h)
To re-check the trip-point, lower output voltage and monitor opening of the VSR
contacts. Fine tune as required to achieve desire trip value.
i)
Reset output voltage to the desired normal operating value. Factory setting is
either 14.1 or 27.0 V.
8.3
Adjustment of Optional CP Interface System
An optional CP interface system is available for use with the model 5220 TEG. This text
describes how to adjust the CP interface system, if applicable.
8.3.1 CP Power Output Adjustment
The 0-1W 300 W variable resistor, located inside the CP cabinet, may be used to adjust
the output power from the CP interface. This resistor may be connected in series or
parallel with the customer load. See Figure 25 for series connection and Figure 26 for
parallel connection.
Gentherm Global Power Technologies
5220
28142 Rev. 14
8-7
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