Gasboy CFN Series Site Controller III - Manual (Page 36)

System Components Wiring Power Requirements
Page 32 MDE-4298D CFN Series Site Controller III Installation Manual · September 2009
Power Requirements
AC Power for the CFN system components, data terminal, and external modem must come
from a separate, dedicated circuit breaker. No other equipment, including the system’s pumps
or remote dispensers, may be powered from this breaker. Whenever possible, a single breaker
should be used to supply the CFN system components, data terminal, and modem. However, it
is acceptable to supply power to the different CFN system components and accessories from
multiple breakers within the same breaker panel and the same phase of power. When
necessary, power for the data terminal or modem may be supplied from a separate, dedicated
breaker located in a different breaker panel.
The system requires 120 VAC ± 10% 47-63 Hz for power. An SC and its attached components
(printer, monitor, and so on) must draw power from an AC Surge Protector Outlet Strip that
cannot be plugged into the optional power conditioner. A power conditioner may be used in
place of the AC Surge Protector. Whenever possible, the AC Surge Protector Outlet Strip or
optional power conditioner must draw their power from the same source.
Proper system grounding is an extremely important part of the system installation. As with the
AC power, the grounds for all CFN system components should return to the same breaker
panel. This ensures that there is a common ground throughout the system, which is necessary
for the protection of the RS-485 data loop circuitry. Grounds for all system devices should be
wired to the breaker panel ground bus bar, which in turn should be grounded to a ground rod.
A conduit ground does not provide a sufficient ground. It is recommended that the neutral and
ground bus bars be bonded together, when it is not prohibited by local codes.
While most of the CFN system components operate on 120 VAC, the ICR2 without a pedestal
PCU (PA039810X0X0) will accept 120/240 VAC ±10% 47-63 Hz.
Wire Size
The AC wire size for power to the CFN system components must be 14 AWG or larger. This
gauge of wire is sufficient for runs of up to 300 feet from the breaker panel to the system.
Components with distances over 300 feet must use 12 AWG wire or larger. All wiring should
be stranded.
The specifications for the RS-485 data loop and RS-232 communication wire/cable size can be
found in
“Communication Requirements” on page 33 .