Spectra Watermakers Ventura 150T MPC, Installation And Operating Manual

Page: 37 / 86

37
Tube A connects
membrane product
outlet to diversion
valve
Membrane
product outlet
Figure 1: Automatic Operation
Tube A discon-
nected
Diversion valve with
manifold outlet
In the event of a sensor failure resulting in a shut down due to a false alarm, the failed sen-
sor can be overridden using the programming function on the display (pages 68-70). High Pres-
sure, Service Prefilter, System Stalled (airlock), and Salinity Probe Failed can all be overridden
and the system will still run automatically with all other functions intact. Be absolutely certain
that the alarm is false before overriding the automatic controls.
In the event of a complete MPC control failure, the system may be operated manually using
the Manual/Auto switch on the MPC Control Box. Automatic controls and water monitoring
are disabled in manual mode, so the diversion valve will send all of your product water over-
board through the brine discharge. The diversion valve must be bypassed, and product water
must be routed directly to the tank from the membrane product water outlet.
Alarm Override and Manual Operation
Figure 2: Manual Operation
Tube B connects
diversion valve to
tank
Tube B connects
membrane prod-
uct outlet direct-
ly to tank
In the event of complete MPC control failure , the system may be operated manually as
follows:

Switch on the feed pump by setting the feed pump switch to RUN MAN. The automatic
safety controls are disabled in manual mode. Shut the unit down if the Clark pump does not
cycle, if air is continuously present in the intake line, or if the feed pump is excessively
noisy.
 Always discard the product water for the first few minutes of operation as the initial product
water may not be potable. Take a water sample by loosening the 1/4
- inch product tube fit-
ting at either the feed pump module or the membrane outlet. Check it with a handheld salin-
ity meter or taste it.

The diversion valve is an electrically operated three - way valve, which is normally energized
by the MPC controls in order to send water to the tank. It will not open automatically in
manual mode, and must be opened using the mechanical override button.
The valve is locat-
ed behind an access opening on the left side of the feed pump module . Push the manual
override button in and rotate 1/4 turn clockwise to open the valve.