DAB DTRON2 35/90 User manual

ﻞﻜﺸﻟاFig. - Fig. – Image - Abb. - Afb. – Fig. - Рис. - Obr. – Kuva – Fig. – Fig. – Εικ. – Şekil – Rys. – Ábra – Fig. – Фиг. -
Fig.1
Fig.2
Fig.3
Fig.5

Fig. 6
Fig. 7
Fig.8
Fig.9

Fig.10
Fig.11

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CONTENTS
WARNINGS............................................................................................................................................................................................ 8
RESPONSIBILITY.................................................................................................................................................................................. 9
1GENERAL ..................................................................................................................................................................................... 9
1.1 Applications......................................................................................................................................................................... 9
1.2 Pumpable Liquids............................................................................................................................................................. 10
1.3 Technical Data................................................................................................................................................................... 10
2INSTALLATION........................................................................................................................................................................... 11
2.1 Mechanical Installation..................................................................................................................................................... 11
3FIRST INSTALLATION ............................................................................................................................................................... 12
4FUNCTION .................................................................................................................................................................................. 13
4.1 Pump start and stop conditions ...................................................................................................................................... 13
4.2 Pump On – OFF................................................................................................................................................................. 13
5CLEANING STORAGE MAINTENANCE.................................................................................................................................... 14
6TROUBLESHOOTING ................................................................................................................................................................ 14
KEY
The following symbols have been used in the discussion:
SITUATION OF GENERAL DANGER.
Failure to respect the following instructions may cause damage to persons and property.
SITUATION OF RISK OF ELECTRIC SHOCK.
Failure to respect the following instructions may cause a situation of serious danger for personal safety.
Notes and general information.
WARNINGS
Read this documentation carefully before installation.
Installation and operation must comply with the local safety regulations in force in the country in which the product is installed.
Everything must be done in a workmanlike manner.
Failure to respect the safety regulations not only causes risk to personal safety and damage to the equipment, but invalidates
every right to assistance under guarantee.
Skilled personnel
It is advisable that installation be carried out by competent, skilled personnel in possession of the technical qualifications
required by the specific legislation in force.
The term skilled personnel means persons whose training, experience and instruction, as well as their knowledge of the
respective standards and requirements for accident prevention and working conditions, have been approved by the person in
charge of plant safety, authorizing them to perform all the necessary activities, during which they are able to recognize and
avoid all dangers (Definition for technical personnel IEC 364).
The appliance may be used by children over 8 years old and by persons with reduced physical, sensory or mental capacities, or
who lack experience or knowledge, on condition that they are under supervision or after they have received instructions
concerning the safe use of the appliance and the understanding of the dangers involved. Children must not play with the
appliance. Cleaning and maintenance intended to be carried out by the user must not be performed by children without
supervision.
Overload protection. 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 about 15-20 min. after which the pump automatically switches on again. After
the motor protector has tripped, it is absolutely necessary to find the cause and eliminate it. See Troubleshooting.

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Failure to observe the warnings may create situations of risk for persons or property and will void the product guarantee.
Particular warnings
Always switch off the mains power supply before working on the electrical or mechanical part of the system. Only firmly
cabled mains connections are admissible. The appliance must be earthed (IEC 536 class 1, NEC and other
applicable
standards).
Mains terminals and motor terminals may still have dangerous voltage when the motor is stopped.
The appliance may only be used for the functions for which it was designed.
Under certain calibration conditions, the converter can start automatically after a power failure.
RESPONSIBILITY
The Manufacturer does not vouch for correct operation of the electropumps or answer for any damage that they may cause if they
have been tampered with, modified and/or run outside the recommended work range or in contrast with other indications given in this
manual.
The Manufacturer declines all responsibility for possible errors in this instructions manual, if due to misprints or errors in copying. The
Manufacturer reserves the right to make any modifications to the products that it may consider necessary or useful, without affecting their
essential characteristics.
1GENERAL
1.1 Applications
Multistage submerged pump with integrated electronics, ideal for use in rainwater systems and irrigation networks, for pumping water from
tanks, cisterns, wells, lakes and for other domestic applications requiring high pressure.
Thanks to their compact and handy shape, they are also used for particular applications as portable pumps for emergency situations such as for
drawing water from tanks or rivers, draining swimming pools and fountains. Also suitable for gardening and general hobby activity.
The electronics automatically control starting and stopping (ON/OFF) of the application depending on the request for water by the user.
The ideal working situation is with the pump completely submerged; however, the motor cooling system allows its use up to the minimum
suction height (110 mm).
The power supply cable and the float switch must never be used to carry or lift the pump. Always use the pump handle.
Use is allowed only if the electric system is in possession of safety precautions in accordance with the regulations in force in the
country where the product is installed (for Italy CEI64/2).
Never pull on the cable to detach the plug from the socket.
If the power cable is damaged, it must be replaced by the manufacturer or by their authorised technical assistance service, so as
to avoid any risk.

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These pumps cannot be used in swimming pools, ponds or basins where people are present, or for pumping hydrocarbons
(petrol, diesel fuel, combustible oils, solvents, etc.) in accordance with the accident-prevention regulations in force. They should
be cleaned before putting them away (See chapter “Maintenance and Cleaning”).
1.2 Pumpable Liquids
Only use the pump in clean water.
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).
If the pump is used for the domestic water supply, respect the local regulations of the authorities responsible for the management
of water resources.
Maximum size of solid particles dispersed in the liquid: Diameter 1 mm (0.04 in)
1.3 Technical Data
DTRON2 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.
Inside 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 35mm from the bottom. (see figure 2).
Products with filter X are characterized by the X next to the pump name.
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 (see figure 3).
Pump models DTRON2 are identified as below (Table 1):
P1 [W]
Q MAX [l/min – m3/h – gpm]
H MAX [m – psi]
35/90
750
100 – 6 – 26.4
37 – 52.6
45/90
930
105 – 6.3 – 27.7
45 – 64
35/120
900
125 – 7.5 – 33
38 – 54
Table 1
All technical data are marked on the technical label on the pump.
The various items are explained below (Fig. 4):

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Fig.4 Data plate
Pos.
Description
1
Description
2
Revision
3
Year
4
Week
5
Serial number
6
Maximum liquid temperature
7
Use
8
Flow rate
9
Maximum head
10
Minimum head
11
Insulation class
12
Degree of protection
13
Submersibility
14
Rated voltage
15
Ampere
16
P1
17
P2 HP
18
P2 kW
19
Frequency
20
Condenser capacity
21
Voltage
22
Rated number of revolutions
23
Logos
24
Pump code
2INSTALLATION
Before starting up the pump, check that:
The voltage and frequency on the pump’s technical data plate correspond to the values of the power supply system.
The pump's power cable or the pump is not damaged.
The electrical connection must be made in a dry place, far from any possible flooding.
The electrical system is provided with a residual-current circuit breaker with I ∆n ≤ 30 mA and that the earth system is efficient.
Any extension cables comply with the regulations in force.
2.1 Mechanical Installation
Install the pump in a location that is not exposed to freezing.
When the pump remains inactive at a temperature lower than 0°C, it is necessary to ensure that there is no water residue which
could freeze and damage it.
Hang the pump by passing the rope through the hole provided (see figure 5). Do not hang the pump by the handle.
Do not install check valves near the pump delivery (distance less than 1 metre (3.28ft)). The pump already has a built-in check
valve on delivery.
The DTRON2 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.
Do not subject the motor to excessive starts per hour. It is strictly recommended not to exceed 60 starts per hour.
It is advisable to use pipes having a minimum diameter of 1’’, to avoid the decrease of pump performance.

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The pump is suitable for vertical or horizontal installations.
Connect a rigid or flexible pipe to the 1¼” delivery of the pump.
The maximum submersibility of the pump depends on the length of the power cable: 12m (39.4 ft) in the case of a cable 15m (49.2 ft) long; 7m
(23 ft) in the case of a cable 10m (32.8 ft) long. Check the details on the technical data plate, as shown in figure 4.
In order to always guarantee a good water flow, it is advisable not to exceed the following heights between the service taps and the pump (see
figure 7).
45/90 35/120 35/90
20 m (65.6 ft) 13 m (42.6 ft) 13 m (42.6 ft)
To facilitate installation in the tank, it is possible to remove the power cable and/or pass it through another passage hole. To
remove it, follow the instructions on the product's quick guide. The electrical cable has a quick connection.
Have this operation carried out by qualified personnel. Check the earth connection before commissioning the product.
The pump has:
•An air vent valve (see figure 8). 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.
•A small spring and diaphragm expansion tank (in the case of DTRON2 pumps). 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.
•An overpressure valve, which prevents water hammer. In case of ice in the delivery pipe with a submerged pump, this valve protects
the pump from breakage.
Installation in a well.
Install the pump so that the pump suction is at least 1 m (3.28ft) above the bottom of the well to prevent the intake of sand and impurities. Use
rigid metal pipes to hang the pump and secure the pipes with brackets at the top of the well.
Installation in a tank
The minimum dimensions for the pump passage in the collecting tank are 180x185 mm (7.09x7.28 in).
Hold the pump slightly up from the bottom so as to avoid possible noises/vibrations transmitted to the tank.
The pump will make noise if it is placed on the bottom of the tank.
To avoid obstruction of the suction passages, it is recommended to check periodically that no dirt has accumulated in the
collection trap (leaves, sand, etc.).
Installation with FLOAT KIT (accessory)
In the case of DTRON2 pumps, an NFC level float can be added.
This accessory, once placed in the appropriate seat in the pump, communicates with the electronic board without the aid of electrical
connections.
The minimum overall dimensions of the pump with float inside a well or tank are as follows:
The minimum recommended distance between the end of the pump float and the wall is 3cm (1.18 in) (see figure 10).
The minimum recommended distance between the float of the suction pipe and the wall (in the case of version X) is 10cm (3.94 in) (see figure
10).
3FIRST INSTALLATION
The pump and the control panel, if present, must be connected to the same power mains, avoiding their being galvanically
separated, as for example due to the presence of open isolation transformers or switches, even single-phase ones.
In particular condominium or industrial contexts, where single-phase users can be connected to different phases of the three-
phase distribution provided by the public operator, the control panel and the pump might not be able to communicate.

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4FUNCTION
The electronics automatically control starting and stopping (ON/OFF) of the pump depending on the request for water.
The electronics protect the pump from faults in the Non Return Valve (NRV) in the pump casing, which are generally caused by dirt or sand
deposits. The deposits may prevent the NRV from closing, even in the absence of water. Adequate maintenance of the NRV is therefore
recommended.
The pump is automatically switched off every hour; if everything is normal, the user only notices a very slight drop in pressure lasting a few
seconds. If the NRV is blocked, the pump will go into alarm and can be restarted after removing the causes of the obstruction, preferably by
disconnecting and reconnecting it to the power supply. However, the alarm stops if the valve is released mechanically.
The electronics protect the pump from dry running, that is without water (see anti-DRYRUN function).
The electronics protect the pump from false starts in the event of water bubbling (see anti-burping function).
4.1 Pump start and stop conditions
When water is consumed in the water supply network, the pump starts when the starting conditions are met. This is done, for example, by
turning on a tap and lowering the pressure in the system. The pump stops again when the water consumption stops, that is when the tap is
turned off.
Start conditions
The pump starts when one of the following conditions is met:
- The flow rate is higher than the minimum flow rate of 2 l/min (0.53 rpm).
- The pressure is lower than the starting pressure (CUT-IN). The cut-in is factory set at 2.4 bar (34.8 psi).
If the pump is equipped with a control panel, the cut-in is variable.
Stop conditions
The pump stops with a delay of 10 seconds when:
-The flow rate is lower than the minimum flow rate with pressure above the CUT-IN.
-The pump stops even when there is no water, safeguarding the motor (see ANTI DRYRUN function).
- Various alarms.
4.2 Pump On – OFF
The pump motor is powered by the electronic control board, located inside the pump body, with an alternating voltage equal to that of the
electrical power mains.
The pump power supply is supplied to the motor according to the evolution of the user's requirements and the hydraulic conditions of the
system, as described below.
CUT-IN / Flow – Normal operation
Normally (in the absence of alarms and when the pump has been primed) the motor is switched on immediately if the pressure is lower than the
cut-in (see paragraph 4.1) or if there is flow. The motor is switched off if the pressure is greater than the CUT-IN and the flow is absent
(however, after 10 seconds of permanence in this condition).
Connection to the power mains - first priming of the pump
After connecting the pump to the mains, the pump motor is switched off and the non-return valve is at rest: if this is not the case, the pump stops
and the motor will never start (see ANTIFLOOD paragraph).
In the normal case, however, the pump behaves as follows:
• If the hydraulic circuit upstream from the pump has a pressure higher than CUT-IN, the pump motor does not start, the priming is finished
regularly.
• If the circuit is not under pressure (P<CUT-IN), the pump motor is started. In this case:
oIf the hydraulic circuit goes under pressure (P>CUT-IN) and there is no flow, for example because the delivery tap is closed,
the motor is switched off 10 seconds after starting: the pump is primed.
oIf there is no flow or pressure for 20 seconds (P<CUT-IN), the pump goes into DRYRUN alarm and is switched off: the pump
is not primed.
oFinally, if there is flow, the pump is primed and runs normally.
Anti DRYRUN
If no pressure and 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.
These restart attempts will be scheduled as follows:

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• From the 1st to the 48th attempt: 1 restart every 30 minutes for 20 seconds each
• From the 49th attempt: 1 restart every 24 hours for 20 seconds each
The DRYRUN alarm can be reset manually: if after this reset the pump still does not detect flow and pressure, attempts will last 20
seconds.
The pump electronics have an anti-burping system that prevents false priming due to possible water bubbles.
ANTIFLOOD
The pump keeps the motor off for 3 seconds when starting. If hydraulic flow is detected during this period, the motor will be kept off as a
mechanical malfunction of the pump shutter may occur.
To avoid the same problem, which would lead to an indefinite start-up of the pump motor (as the presence of hydraulic flow would always be
detected), during normal continuous operation, the motor will be switched off every 60 minutes.
If the hydraulic flow does not go to zero, as expected, the pump goes into ANTIFLOOD alarm and its motor will be kept off.
If this alarm is present, the pump must be switched off. Mechanical problems with the non-return valve must be solved. If the valve is still
mechanically released, e.g. due to vibration of the pump body, the ANTIFLOOD alarm will be removed.
5CLEANING STORAGE MAINTENANCE
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.
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.
6TROUBLESHOOTING
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.
FAULTS PROBABLE CAUSES REMEDIES
The pump does not turn on
or does not stay on.
1. Pump is not powered
1. Check power supply
2.. No water 3. Restore the water level
The pump does not deliver
water
1. The suction grid or the pipes are blocked
1. Remove the obstructions
2. The impeller is worn or blocked
2. Replace the impeller or remove the
blockage
3. The head required is higher than the pump’s characteristics
The flow rate is insufficient
1. The suction grid is partly blocked
1-2 Remove any obstructions
2. The impeller or the delivery pipe are partly blocked or encrusted
Pump stops (possible
tripping of the thermal safety
switch)
1. The liquid to be pumped is too thick and overheats the motor.
1-2-3-4 Disconnect the plug and remove the
cause that caused the overheating, wait for
the pump to cool down and reinsert the plug.
2. The water temperature is too high
3. A solid body is blocking the impeller
4. Power supply not in accordance with data plate values