Syn-Tech Systems FuelMaster FMU-2500 Classic Installation Manual page 46

Servicing Site Requirements
Sites may be arranged with any combination of one Master FMU and up to eight Satellite FMUs
(including EIUs). Master FMUs and Satellite FMUs can control up to eight hoses each. EIUs can control
one ancillary equipment item (door/gate opener, car wash, etc.) each.
Servicing site equipment includes all equipment mounted on the service island and in the station
house.
Custom applications have been developed for the FMUs to operate from 220 VAC. If such an
application is desired, Syn-Tech must be informed when the order is placed to accomplish the
necessary equipment alterations.
AC Power
FMUs and EIUs have minimum power requirements that must be met for satisfactory operation, and
should be powered from a separate power source with a dedicated circuit breaker rated no less than
15 amps. If site construction does not permit a separate FMU power source, power may be derived
from other service island equipment. When a separate power source is not used, the FMU is
susceptible to resets should the input power drop below the minimum requirement. Careful
consideration should be given to the choice of the power source to ensure FMU operation under all
operating conditions. If powered from the same circuit as equipment with high power loads (i.e.,
dispensers with, or directly powering, pump motors), input power to the FMU and/or EIU may drop
below the minimum power requirement. FMUs will shut down when input power drops below the
minimum required for operation (approximately 75 VAC), and will not resume operation until input
power is great enough (reaching approximately 95 VAC) to support normal operation.
Heater pads in the upper and lower cabinets (behind the Backplate Assembly and Pedestal I/O
Board) are thermostatically controlled to apply heat as temperatures drop. The heaters start to draw
power to generate heat and remove moisture at approximately 70 degrees F. As temperatures fall,
the heaters draw more power to generate more heat. At full output the heaters draw approximately 1
amp each for a total of 2 amps for both heaters. The other electronics in the FMU draw
approximately 400 milliamps. The total current draw will be less than 3 amps.
Errors on Power-Up
after power-up until the electronics dry out and warm up. Let the FMU run for a couple hours before
assuming there are non-recoverable errors.
While voltage regulators and power conditioners both offer protection, they do not perform the
same functions. It is recommended the specifications of the device be compared to the need
before making a purchase.
Power Conditioners/Voltage Regulators.
significantly and overvoltages or brownouts occur, power conditioners or voltage regulators may be
installed between the FMU and its power source for protection against high or low power inputs.
These devices condition or regulate power to a constant or maximum output. Power conditioners
maintain a constant power input when voltage may otherwise fluctuate between highs and lows
which may not be acceptable to FuelMaster
voltage inputs similar to what may occur when an unregulated generator is initially turned on. Power
conditioners are more complex and substantially more expensive to purchase. A power conditioner
previously tested with FuelMaster
150-8. In 2013, price was approximately $1200 each. A voltage regulator previously tested with
FuelMaster is the APC Line-R LE-1200 (LE-1200I for international use). In 2013, the price was
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approximately $48.
FuelMaster
®
: an FMU newly installed in a cool, damp environment may display errors
is the Sola Electric constant velocity transformer, model 23-23-
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Installation Manual
NOTE
NOTE
NOTE
In locales where power sources fluctuate
. Voltage regulators protect FuelMaster from high
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