Gasboy Electric Keytrol - Manual (Page 7)

03/28/03 2-1
Section 2
SYSTEM FEATURES
POWER SUPPLY
24 volts DC is supplied via a 115/24 volt transformer (230/24 volt transformer for 230 VAC EK’s)
and bridge rectifier made up of diodes D1-D4. Any multimeter or DC voltmeter may be used to
check the power supply voltage, which should be 24 + 5 VDC. for 115 or 230 VAC, 50-60HZ.
POWER RELAY
The power relay is rated at 3/4 HP at 115 or 230 VAC. It is permanently wired in to break the hot
side of the 115 VAC line or L1 of the 230 VAC line. One side of a 115 VAC motor is connected to
neutral by the customer, and the other side of the motor is fed from the output of the power relay
or motor switch terminal on the Electrical Keytrol terminal block. In case of the 230 VAC motor,
one side of the motor is connected to L2 while the other is connected to the Electrical Keytrol
motor (switch) terminal.
ANTI-MULTI KEY COUNT FEATURE
The keyswitches are wired in series, which ensures the accumulation of counts on only one
counter in the event that a second (or more) key is inserted while the pump is being operated.
See diagram below. For example, if keyswitch 2 is turned on, all keyswitches after this position
will not function. If, however, while user 2 is pumping fuel and user 1 inserts his key, the pulses
will accumulate on totalizer 1, but not on totalizer 2. Any user will immediately realize his error,
since the totalizer will start counting while the user still has his hand on the key.
MANUAL/AUTOMATIC BYPASS SWITCH (AUTO/MAN)
The function of the Electric Keytrol may be bypassed by setting the Auto/Man switch to the
Manual position. This setting allows fueling without using a key and/or without totalizing the fuel
on any counter. It is also used in the event of a failure of any electrical portion of the Keytrol.