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SECTION 4.2
OPERATIONAL ANALYSIS
DC CONTROL
PART 4
• "Utility" voltage is delivered to the primary winding
of a sensing transformer (TX), via transfer switch
wires N1/N2, fuses F1/F2, connected wiring, and
Control Panel "Utility 1/Utility 2" terminals. A
resultant voltage (about 16 volts AC) is induced into
the transformer secondary windings and then
delivered to the circuit board via Wires 224/225.
The circuit board uses this reduced "Utility" voltage
as sensing voltage. Wires 224A/225A supply 16
VAC to the battery charger.
• Battery output is delivered to the circuit board with
the Auto-Off-Manual switch (SW1) set to AUTO, as
shown.
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