This document describes a multistage submerged pump with integrated electronics, designed for use in rainwater systems and irrigation networks, as well as for pumping water from tanks, cisterns, wells, lakes, and for other domestic applications requiring high pressure. It is suitable for garden and general hobby activities.
Function Description
The pump automatically controls starting and stopping (ON/OFF) based on the application, depending on the request for water. The integrated electronics manage the pump's operation, ensuring it starts and stops automatically. The motor cooling system allows its use up to a minimum suction height of 110 mm.
The pump is equipped with a thermal motor protector. If the motor overheats, the motor protector switches the pump off automatically. The cooling time is 15-20 minutes, after which the pump automatically switches on again. If the motor protector has tripped, it is advisable to investigate the cause and eliminate it.
The pump features a non-return valve (NRV) in the pump casing, which prevents water from returning to the pump from the delivery pipe. This protects the pump from leaks in the system, which would cause continuous restarts (anti-cycling function).
The pump can operate in two modes:
- Monitor Mode: Provides information about the pressure on the delivery of the DTRON3 pump, motor status, pump disable status, current faults/alarms, and connection status of the COM BOX with the DTRON(s). It allows for resetting any alarms present and disabling/enabling pump operation.
- Setup Mode: Allows the user to vary the CUT-IN pressure, manually activate the pump, disable/enable the connection between COM BOX and DTRON, and activate/deactivate recognition of the ANTICYCLING condition.
The pump also has an anti-cycling function. If the pressure is low and no flow is detected during normal operation (or during pump start-up) for 20 seconds, the pump will go into DRYRUN alarm and the motor will be switched off. The pump control electronics will try to restart the pump until the dry running condition, i.e., the absence of flow and pressure, is no longer detected.
Important Technical Specifications
- Maximum Submersion Depth: 13m (42.6ft) for the pump, and 20m (65.6ft) for the entire system.
- Minimum Suction Height: 110 mm.
- Maximum Size of Solid Particles Dispersed in the Liquid: 1 mm (0.04 in).
- Minimum Water Level for ON: 510 mm (20.1 in).
- Minimum Water Level for OFF: 170 mm (6.7 in).
- Minimum Submersion Depth: 520 mm (20.5 in).
- Power Cable Length: 15m (49.2ft) for the 45/90 model, 12m (39.4ft) for the 35/120 model, and 10m (32.8ft) for the 35/90 model.
- Maximum Delivery Head: 45m (147.6ft) for the 45/90 model, 36m (118.1ft) for the 35/120 model, and 30m (98.4ft) for the 35/90 model.
- Flow Rate: Up to 5.7 m³/h for the 45/90 model, 4.2 m³/h for the 35/120 model, and 3.8 m³/h for the 35/90 model.
- Rated Voltage: 220-240 V~.
- Frequency: 50 Hz.
- Insulation Class: F.
- Degree of Protection: IP 68.
- Rated Current: 3.8 A for the 45/90 model, 3.2 A for the 35/120 model, and 2.8 A for the 35/90 model.
- P1 KW: 0.9 kW for the 45/90 model, 0.75 kW for the 35/120 model, and 0.65 kW for the 35/90 model.
- P2 HP: 0.75 HP for the 45/90 model, 0.5 HP for the 35/120 model, and 0.33 HP for the 35/90 model.
- Capacitor: 12.5 µF for the 45/90 model, 10 µF for the 35/120 model, and 8 µF for the 35/90 model.
- Number of Revolutions: 2850 rpm.
Usage Features
- Pumpable Liquids: The pump must not be used to pump salt water, sewage, inflammable, corrosive or explosive liquids (e.g. petroleum, petrol, thinners), greases, oils. The temperature of the liquid to be pumped must not exceed 50°C (122°F).
- Installation: The pump should be installed in a vertical position. The minimum diameter of the well or tank should be 1". The pump is suitable for vertical or horizontal installations.
- Connecting to a Flexible Pipe: Connect a rigid or flexible pipe to the ½" delivery of the pump.
- DTRON3 Pumps: DTRON3 pumps are equipped with a filter, which can be opened (see figure 1, A) or closed (called X) (see figure 1, B), depending on the application. The open filter prevents the passage of suspended particles with a diameter greater than 2.5 mm. If there is a splitter that prevents suction from the bottom, up to a level of 80mm, it is possible to cut or remove it to be able to suck water up to a minimum of 10mm from the bottom.
- Filter X: The filter X is characterized by a base, which is not watertight, with a 1" female connection. The filter X is designed to be used with the KIT X: suction kit with float.
- Air Vent Valve: An air vent valve (see figure 8) is present. This valve allows the pump to prime in a very short time. If the water level is lower than the valve level, some water may escape from the vent valve.
- Small Spring and Diaphragm Expansion Tank: The pump contains a small spring and diaphragm expansion tank. This limits the number of pump restarts and compensates for small system losses. The tank protects the pump in case of water hammer. The tank does not require any refilling or maintenance.
- Overpressure Valve: An overpressure valve, which prevents water hammer, is present. In case of ice in the delivery pipe with a submerged pump, this valve protects the pump from breakage.
- COM BOX: The DTRON3 pump can work in "Auto" mode (default) or in "MANUAL MODE". The COM BOX is an optional accessory that allows for advanced control and monitoring of the pump. It can be connected to the DTRON3 pump via a power line communication protocol.
Maintenance Features
- Cleaning: The pump does not require any maintenance. Frost can damage the pump. In very cold temperatures, remove the pump from the liquid, empty it and store it away from frost. Before any cleaning work is carried out, the pump must be disconnected from the power mains.
- Filter Cleaning: Once the pump has been removed from the liquid, it is advisable to clean the following parts with a simple jet of water:
- Filter (open, see figure 1A).
- Suction filter with float, in case of version X (see figure 3).
- Non-return valve. In this case, remove the part concerned as shown in figure 11.
- Be sure to reassemble all parts correctly.
- Checking for Damage: Before starting to look for faults, it is necessary to disconnect the power supply to the pump (take the plug out of the socket). If the power cable or any electrical part of the pump is damaged, the repair or replacement must be carried out by the manufacturer or by their technical assistance service, or by a person with equivalent qualifications, so as to prevent any risk.
- Pump does not turn on or does not stay on:
- Pump is not powered: Check power supply.
- No water: Restore the water level.
- Pump does not deliver water:
- The suction grid or the pipes are blocked: Remove the obstructions.
- The impeller is worn or blocked: Replace the impeller or remove the blockage.
- Flow rate is insufficient:
- The head required is higher than the pump's characteristics.
- The suction grid is partly blocked.
- The pump or the delivery pipe are partly blocked or encrusted.
- Pump stops (possible tripping of the thermal safety switch):
- The liquid being pumped is too thick and overheats the motor.
- The water temperature is too high.
- The pump body is clogged by impeller.
- Power supply not in accordance with data plate values.
- DTRON3 pumps: The DTRON3 pumps already contain a small expansion tank, calibrated for water hammer and small leaks. In order to reduce the number of pump starts, an auxiliary tank (Figure 6, A) with a capacity of 2 litres can be installed. If you want to install an additional non return valve (Figure 6, B), it is recommended to position it downstream from the auxiliary tank.
- Motor Maintenance: Do not subject the motor to excessive starts per hour. It is strictly recommended not to exceed 60 starts per hour.
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