Truedpd Free Chlorine Sensor - Option - ControlOMatic POOLWARDEN PW-Plus Installation Manual

TrueDPD Free Chlorine Sensor - Option

The TrueDPD is an optional accessory that adds a free chlorine measurement. The measurement uses
the DPD method and is not affected by pH, cyanuric acid, saltwater chlorine generators or any other
variables that affect an ORP or amperiometric measurement. It interfaces with the controller using one of
the existing flow switch inputs.
Mounting: Locate a vertical section of wall space close enough to the controller so that the interface
cable can reach the controller. Attach to the wall with 4 screws. The TrueDPD must be located close to the
flow cell for the tube to reach.
When making a measurement, water will flow through the supply tube for about 20 seconds and for fresh
water to reach the sample chamber the supply tube must be as short as possible. Water from the
TrueDPD goes to the drain and does not continuously flow to keep the water fresh. With higher sample
times, the water in the tube will be less representative of the pool water as time goes on until the next
measurement.
Drain: Attach 1/2" tubing to the drain connection on the front of the measuring cell. The tube needs to be
routed through the cable grip near the front bottom center of the box. The tube end should be routed to a
waste drain that is lower than the TrueDPD and should have no obstructions. If there is no drain then a
bucket can be used but it will need to be emptied a couple times a week.
Water In: Attach a 1/4" "T" to the exit of the flow cell before the shut off valve. Attach the 1/4" NPT to barb
into the "T". Route the inlet tube from the TrueDPD and attach to the barb. WARNING: If the pressure is
too high the tube may pop off of the barb fitting. The tube has a barb fitting on the flow cell and
inside the TrueDPD enclosure at the small pump. If inside the TrueDPD damage will occur to the
motors and circuitry.
� Pool1 (PPM1) uses the lower pump on the left and Pool2 (PPM2) uses the pump on the right.
PoolWarden Interface: Connect the red interface wire to the Flow4 input on the PoolWarden display
board and the black wire to GND.
Power Supply: Plug the power supply into the power source. The power supply also supports 240 VAC.
If power source is 240 VAC then a suitable plug adapter may be needed. If there is no outlet, a short
extension cord can be used inside the controller enclosure allowing the 12V power supply to reside inside
the enclosure where it has additional protection.
PoolWarden Manual • www.poolwardentraining.com • 530-205-4520 • 15