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10.0 INPUT/OUTPUT EXTERNAL CONNECTIONS (FOR EXTERNAL ACCESSORY)
As shows on paragraph 3.3 the three connectors are used for connecting the accessories.
Namely the accessories are:
- Level control switch;
- Flow sensor;
- Water meter input (Reed switch type);
- Output service relay
It is very important to disconnect the power from the pump when connecting the accessories. It is also very
important to protect the unutilized connectors with male connectors supplied with the pump.
Such operation will protect the internal circuitry from unwanted shorts and/or the power surge either from the
operator or from different sources. There will be no accessible contacts after installation is completed.
It is imperative that the accessories will be supplied by the factory to avoid unwanted mismatched situations
and/or furthed possible damage (wich in this case will be no covered by the warranty).
Further more cables and accessories must be idoneus and rated for the proper voltage and type of insulation.
SUMMARY OF TYPE OF CONNECTIONS
1. INPUT LEVEL SWITCH: as shown on paragraph 3.3 the pins #3-4 from position 2 are dedicated to the
operation of the level sensor. Such operation is activated by a float containing one magnet if the liquid is below
the position or completely absent the flow will slide down activating a reed switch.
2. INPUT FLOW SENSOR: as shown on paragraph 3.3 the pins #1-2 from position 2 are dedicated to the
operation of the flow sensor (only for VFT/M).
3. INPUT FROM WATER METER: our pump (pins #3-4 from position 3) can be connected to a water meter generating
reed switch signal proportional to a certain quantity of water passing through out. It must be clear that such
signal are only of ohmic nature and they do not carring any power.
Connecting to the pump a different type of water meter generating any voltage will irrevocably damage the
pump thus avoiding any warranty.
4. OUTPUT SERVICE RELAY: such relay utilize the pins #1-3 (connecctor #1 paragraph 3.3) wich are
activated in case of alarm status.
11.0 - TROUBLE-SHOOTING COMMON TO DLX AND DLX/B SERIES
11.1 - MECHANICAL FAULTS
As the system is quite robust there are no apparent mechanical problems. Occasionally there might be a loss of
liquid from the nipple because the tube nut has loosened, or more simply the discharge tubing-has broken.
Very rarely there may be losses caused by the breakage of the membrane, or by the membrane seals in which
case they have to be replaced by disassembling the four screws of the pump head fig. 11), when re-mounting
the pump head ensure that the screws are replaced properly , along with "O" ring.
After repair , the metering pump will need to be cleaned of additive residues which can damage the pump cas-
ing.
THE METERING PUMP GIVES PULSES BUT THE ADDITIVE IS NOT INJECTED
a. Dismount the suction and discharge valves, clean them and replace, see position (fig. 11). Should the valves be
swollen, check valves material against our chemical resistance compatibility chart and fit correct valves.
Standard valves are Viton. Upon request ball check valve, can be supplied.
b. Check clogging of the filter . .
ATTENTION: When removing the metering pump from the plant, be careful as there might be some residual
additive in the discharge hose.
11.2 - ELECTRICAL FAULTS
ALL LEDS OFF, THE PUMP DOES NOT PULSE
Check power supply (socket, plug, power switch ON ), if the pump doesn't work contact manufacturer Customer
Service, Dealer or Distributor .
GREEN LED (POWER) ON, RED LED (PULSE) OFF, THE PUMP DOES NOT PULSE
Press the START/STOP button. If the pump is in water meter mode check the water meter connection. If the pump doesn' t
work contact manufacturer Customer Service, Dealer or Distributor
PUMP PULSES ARE NOT CONSTANT
Check that supply voltage is within +/- 10% of rated voltage.
THE DOSING PUMP GIVES ONLY ONE PULSE
Disconnect the equipment and contact manufacturer Customer Service, Dealer or Distributor .
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