DDPHCL2_man_r1.0 – 03/2021
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9. Wrap PTFE tape to the thread and tighten the injection valve to the fitting.
10. Unscrew the pipe-wrench nut of the injection valve fitting.
11. Cut the white, semi-rigid, PE tube.
12. Insert the pipe-wrench on the PE tube.
13. Mount the tube on the conic hose of the injection valve, pushing it until it reaches the stop collar.
14. Screw the pipe-wrench nu tonto the valve fitting.
Note:
The injection valve also works as non-return valve: do not disassemble it internally.
ELECTRICAL CONNECTIONS
The DDPHCL2 unit is supplied already wired internally and complete with power cable (with plug upon
request). This is the only electrical connection to be performed by the customer.
Standard power supply: 230 V
∼
, 50 Hz, monophasic.
Carefully follow all the rules of electrical safety.
Before starting the unit, check that all electrical and plumbing connections have been
properly executed.
The measure inputs from pH and redox electrodes are available on BNC connectors, while inputs for
level sensors (one for each pump) and flow sensor are available on special connectors that allow an
extremely fast and easy connection even for unskilled personnel.
Note:
the pH and redox inputs should never be left open; if an input is not used, you need to short-
circuit it.
Level Control
The system is supplied already configured for disabling the dosage in case of low level in
the tank. The level control is made through a specific float sensor (optional, see
“Accessories and spare parts”), to be connected to pins 3 and 4 of the LEV connector
(see Figure)
When the product level in the tank falls below the level sensor, the unit stops dosing and
the fault is shown on the display.
The alarm condition is generated with a delay of a few seconds compared to the detection of low level,
to avoid errors due to extreme situation (such as water surface).
Two inputs for level sensor are available, one for each pump / tank.
Flow Control
The system is supplied already configured for disabling the dosage in case of lack of
water flow. The control is made through a SPDT contact to be connected to pins 3 and
╧
of the FLOW connector (see Figure).
A specific flow sensor is also available (optional, see “Accessories and spare parts”).
