Water Tool Back Flush 2 Wire Controller - Hit Products Corporation

PRessuRe DIffeRenTIal sWITCh
1/4”
TUBING
TO HIGH PRESSURE
CONNECTOR ON THE
INLET
HIGH
PRESSURE
PRGM + -
12V DC 12V DC
Pressure Differential switch
The Pressure Differential Switch terminal is located on the bottom right of the Controller
board labeled Pressure Switch. A Pressure Differential Switch can be used to initiate a
complete Back Flush cycle. When a Pressure Differential Switch is installed and a preset
Pressure Differential is reached a Back Flush cycle will start.
For adjustment see page 12.
NOTE: To have Pressure Differential Switch be the exclusive initiator of a flush cycle, the controller
must be in the “OFF” mode (this eliminates the Periodic Flush Time from initiating a flush cycle).
To put the controller in the “OFF” mode;
1. Turn Dial to Position 11, the “OFF” position.
2. Push UP Arrow Button. Screen will go blank and now only the Pressure Differential Switch will
initiate a flush cycle. The Number of filters, Back Flush Time and all Dwell Times input into
controller will remain intact for each flush cycle initiated by the Pressure Differential Switch.
3. Leave Dial in Position 11 (with blank display).
NOTE: With the controller in Dial Position 12. Both the Periodic Flush Time and a connected
Pressure Differential Switch will initiate a Back Flush.
NOTE: Pressure Differential Dwell Time, Dial Position 9.
EXT R PRESSURE
SWITCH
WWW.RAINPROCO.COM Water Tool Back Flush Controller 11
LINE
OUT
PRESSURE
DIFFERENTIAL
SWITCH
LOW
PRESSURE
COMMON AND
NORMALLy
OPEN CONTACTS
1/4”
TUBING
TO LOW PRESSURE
CONNECTOR ON THE
OUTLET