Spectra Watermakers Ventura 150T MPC, Installation And Operating Manual

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INLET OFFSET: This parameter calibrates the pressure sensor on the inlet side of the black pre -
filter housings. This sensor, and its cable, are usually marked with red heat shrink tubing. The num-
ber on the left is the real time pressure reading and the number on the right is the offset. Factory
default for Ventura models is 0. The reading can be increased or decreased by putting a positive or
negative number in the offset setting.
OUTLET OFFSET: Outlet offset calibrates the sensor on the outlet side of the black pre-filter hous-
ings. This sensor, and its cable, are usually marked with green heat shrink tubing. In addition to
providing the differential pressure reading, across the pre-filters, this sensor also provides the Feed
Pressure reading. The number on the left is the real time pressure reading and the number on the
right is the offset. Factory default for Ventura models is 0.
With new filters installed, adjust the Outlet Offset so the pressure reading (number on the left) is 2
PSI lower than the Inlet Offset pressure reading. If the system alarms “Service Prefilters,” this
means the reading for the pressure differential between the two sensors is exceeding the number
programmed under Pressure Differential. If the filters are clean and you still receive this alarm,
changing the Outlet Offset is the preferred method to eliminate this alarm.
BRIGHTNESS: The brightness is not adjustable on LCD displays supplied with Ventura models, but
may be adjusted on Vacuum Fluorescent Displays. Factory default is 0.
FLUSH DURATION: This parameter sets the length of the fresh water flush in minutes. Factory
default is 3. This should be the same as Pump On Time.
PUMP ON TIME: Sets the length of time the feed pump will run during the flush. Factory default
is 3.
PUMP OFF TIME: Sets the time in minutes that the flush valve is open, but the feed pump is not
running, at the beginning and end of the flush cycle. This function is not used on Ventura models,
so factory default is 0.
FLUSH INTERVAL: This is the time in days between automatic flushes when the system is in Auto
Store mode. Factory default is 5 days; 30 days if your system came fitted with the optional Z-Ion.
While this parameter is programmed in days, the flush interval countdown timer will read in hours.
MPC 5000 Software may be loaded from www.spectrawatermakers.com or CD ROM, and in-
stalled on most Windows-based computers. The computer must then connect to the MPC board
with a USB cable with a type B connector on one end, as shown. Due to wide variations in comput-
ers and operation systems, Spectra cannot provide installation support,
and we only recommend this software for experi-
ence technicians. All parameters and program-
ming can be easily accessed from the MPC dis-
play, without this software.
Type B connector plugged
into MPC circuit board