DAYLIFF DBE Installation instructions

DBE
Horizontal Multistage Pumps
Installation &
Operating Manual
DBE 5-40 DBE 12-40

SPECIFICATIONS
1.
1
2.
SYMBOLS & WARNINGS 3
INSTALLATION PRECAUTIONS
3.
4
OPERATION & MAINTENANCE
5.
13
TROUBLE SHOOTING
6.
15
INDEX
© Davis & Shirtliff Ltd 2022
Contents herein are not warranted
TERMS OF WARRANTY
7.
18
INSTALLATION & CONNECTION
4.
7
4.1 Pump Location 7
4.2 Pipe Installation 8
4.3 Pump Installation 8
4.4 Electrical Connections 9

1
1. PUMP SPECIFICATIONS
Congratulations on selecting a Dayliff DBE Pumps. They are
manufactured to the highest standards and if installed and
operated correctly will give many years of efcient and trouble
free service. Careful reading of this Installation Manual is
therefore important, though should there be any queries they
should be referred to the equipment supplier.
DBE 5-40 DBE 12-40
3
FLOW RATE (m /hr)
3
FLOW RATE (m /hr)
100%
264
8
4
0010 14 18
10
20
90
40
30
60
50
70
80
PUMP HEAD (m)
10
20
70
40
30
60
50
90%
80%
60%
70%
50%
40%
30%
13 5 7 9
100%
90%
80%
60%
70%
50%
40%
30%
2 6 8 12 16
DBE 12-40
PUMP HEAD (m)
DBE 5-40

2
PUMP
The Dayliff DBE Booster is a compact water boosting unit for water supply in domestic
and commercial applications for single and two booster pump systems. The pump is
fitted with an integral variable speed controller that maintains pump output at
constant pressure (adjustable up to 5bar) with varying demand. The pump is compact
for simple installation, quiet with low operating noise level and of robust design for
long life. The speed controller maintains pump performance at maximum efficiency
thereby minimizing operating costs.
Particular features include:
• Booster output is adapted to demand by changing speed and number of
pumps in operation.
• Automatic pump alternation in multi-pump setup to ensure uniform operating
periods.
All hydraulic parts are made from AISI304 stainless steel, and the pump unit is
supplied with a 5-way connector, non-return valve and integrated pressure sensor.
For optimal operation, appropriately sized pressure tanks are required with 3L being
the minimum recommended size.
MOTOR
The pump is fitted with high efficiency IE4 Permanent Magnet variable speed motor
that incorporates thermal protection against motor overload and dry run protection
with auto-restart. The motor can be directly connected to the mains power supply
through appropriately sized FUSE or MCB.
Enclosure Class: IP44 Insulation Class: F Voltage: 1x240V
Speed: 4200rpm(DBE5-40),
4400rpm(DBE12-40)
OPERATING CONDITIONS
Pumped Liquids: Thin, clean non-aggressive and non-explosive liquids without
solid particles or fibres
0
Liquid Temperature: 0 - 70 C
0
Max. Ambient Temperature: +40 C
Max. Suction Lift: 1m
Max. Suction Lift: According to NPSH curve plus a safety margin of 1
0
Max. Operating Pressure: 10 Bar up to 40 C
0
6 Bar up to 90 C
Water Inlet Pressure: More than 1.2 Bar less than 3.5 Bar

3
PUMP DATA
Model
Dimensions (mm)
H1
Weight
(kg)
W
Current
(A)
Motor
HP
kW
3 16 2832914135059523422
2.2
28.9 1022811227730319911¼
1.1
DBE 12-40
DBE 5-40
A1
(”) A2
(”) L H2 H3
LW
H2
H3
H1
L
H1
H2
H3
DBE 5-40 DBE 12-40
W
2. SYMBOLS & WARNINGS
WARNING
Reliable ground connection is necessary before
operating
WARNING
Do not touch the pump when its is energized
WARNING
In order to prevent electric shock, ensure the power
switch is ‘OFF’ or remove the plug before maintenance
and cleaning
WARNING
When operating the pump, do not remove or open the
safety protection device
WARNING
In order to avoid overloading the pump should be
operated within the scope of prescribed conditions
WARNING
Do not run the pump without water inside pump, else
damage of pump mechanical seal and sliding bearing
will occur

3. INSTALLATION PRECAUTIONS
Power Requirements
Power supply voltage: should be within 220V-240V. When the voltage is too low,
the pressure will be reduced.
Electrical Connection
Before installation and use, check whether the
pump is damaged during transport and
storage,
Check that the insulation resistance is greater
than 50MΩ.
The pump should be properly installed
complete with leakage protection device. The
power outlet which connects to the plug should
be reliably grounded.
4
WARNING
The water pump should not be installed in ooded
conditions. When installed outdoors, ensure to protect
against sun and rain.
Pump Installation Environment Requirements
If the power cord is extended, it should be appropriately sized as per table in
this manual to minimise voltage drop
The pump should be installed in a convenient area so as to allow for maintenance
and inspection of the pump. The place should be kept dry and well ventilated.
Ambient temperature allowable is -15°C to + 40°C. When temperature is below
0
4 C, the water pump and the pipeline in the water will form ice causing the pump
body and pipe to rupture.

5
It is important to install a drainage line so as to drain the water caused by the
leakage.
Piping Requirements
The piping size should match pump inlet and outlet and shall not be less than the
outlet piping diameter.
Select the pipes matching with
the pump inlet & outlet and the
i n l e t d i a m e t e r s h a l l n o t
less than the outlet diameter
! For first time use, fill priming port with water in order to bleed air
Before running the pump, empty air and ll
water inside the pump body, tighten the
deated bolt
Setting the Requirements
The pressure setting should not be less than the pressure of the outlet piping itself.
The starting pressure value is set to about 80% of the constant pressure value.
WARNING
During transport and installation of the pump, avoid
carrying the pump using the power cord, else electric
shock due to power cord damage may occur.

6
WARNING
When the pump is in operation and needs to be moved,
turn off the power rst to avoid electric shock.
Plug reliable
ground connection
is necessary

7
4. INSTALLATION & CONNECTION
Before installing the water pump, check that the model and spare parts of the water
pump are consistent with the purchase order
4.1 Pump Location
Install the pump in a well ventilated position with suitable cover to avoid exposure
to direct sunlight or rain.
The pump should be installed in a convenient place for ease of service. When
pump installed in a narrow place, refer to below figure for the reference spacing
25mm 25mm

8
4.2 Pipe Installation
It is recommended to install isolation valves on both sides of the pump, so that the
system will not be drained during pump maintenance. If the pump is installed
above the water level, a foot valve must be installed on the suction pipe under the
liquid level. The correct pipe size should be selected according to the inlet pressure
of the pump.
Indirectly-pressurized supply of tap water Water supply to water tank on
roof and downward pressurization
of water supply
4.3 Pump Installation
! Pump should be installed in well ventilated cool place and away from direct
sunlight for effective air flow around the cooling fan of the motor, ensure the
pump is atleast 150mm away from obstacles.
! In order to minimize the inlet friction loss, the inlet pipe should be as short as
possible.
! Before pump installation check that pipe system has check valve fixed to
prevent water backflow.
! Pump should be installed on a rigid and level ground.
! Before pump installation, inlet pipes should be clean, and if need be a screen
filter may be installed infront of the inlet 0.5 ~ 1 m.
! When installing the inlet pipe, ensure that air is not trapped inside.
! When pump is installed above water level (within allowable suction head), the
suction pipe should be fitted with a foot valve to maintain prime.
WARNING
Do not put the weight of the piping on the pump, else
deformation will occur. When installing the inlet pipe,
prevent air from being drawn in.

9
! Ensure that the motor lead wire is connected to the power supply in
accordance to the wiring diagram provided in the terminal box and motor
nameplate.
! The motor must be connected to power supply through appropriately sized
fuse or breaker.
4.4 Electrical Connections
WARNING
The connection of the electrical circuit must be carried
out by a qualied electrician in accordance with local
regulations.
WARNING
Before removing the motor terminal box cover and
disconnecting the pump, make sure that the power
supply has been switched off.
Pump Connection
! Pump should be reliably grounded to prevent leakage, and should match the
leakage protection switch; Electrical connections and protection should be
performed accordingly; Working voltage is marked on the nameplate,
ensure the supply power is matched with the motor power.
! If pump is installed far away from power supply , ensure correct selection of
cable size to minimize power losses refer to table 1 for guidance.
Power Wire Length
Model
0~50m Fuse
A50~100m Fuse A100~150m Fuse A
DBE 5-40
DBE 12-40
2
1.5mm 10 2
2mm 15 18
2
2.5mm
2
2.5mm 27 2
4mm 30 30
2
6mm

Intelligent Pump Electrical Schematic Diagram
11
Control Panel Operation Instructions
Output to motor
Display Control Panel
Programmatic Interface
Outlet Pressure Sensor
Inlet Pressure Sensor
Fuse Wire
Power Input
220V
Intelligent
Driver
Board

12
Function Introduction
The DBE pumps have the following features
1. High efficiency, energy saving, intelligent, constant pressure and frequency
conversion; Water flow and pressure control; Manual, Automatic control;
Water shortage, overload, locked-rotor protection.
2. Motor soft start and soft stop, effectively protecting and improving the service
life of the motor.
3. Auto-start function: which ensures the pump runs for few seconds
automatically every 12 hours to prevent the impeller from jamming.
4. Colorful panel which shows the error code with the indicator lights, if two or
more errors are detected at the same time, the codes will be displayed
alternately every 2 seconds.
E1 Lack of water
Code Function/ Alarm
E2 Leakage (frequently start)
E3
Rotor Locked
E4 Motor Error
E5 Inlet Sensor
E6 Outlet Sensor
E8 Controller
E11 Voltage Error
E12 Driver board overheating error
E17 Panel and motherboard communication fault

13
5. OPERATION & MAINTENANCE
WARNING
Do not run the pump without water, else may damage
the mechanical seal and bearing.
1. The pump must be filled with water before starting. To do this,
ŸClose the pump outlet valve, open the vent screw on the pump head,
slowly open the inlet valve, until the water flows out of the vent plug screw.
ŸTighten the plug screw.
2. Check the rotation direction as follows
Switch off the power supply and observe the direction of rotation (Reference
fan). The correct rotation from the motor side should be counterclockwise
rotation.
3. Before starting the pump, check the following
ŸPump is fixed firmly.
ŸPump is filled with water.
ŸGrid voltage matches motor nameplate.
ŸMotor rotation direction is correct.
ŸAll the pipes are tightly connected.
ŸThe inlet of the valve is fully open.
ŸOutlet valve should be opened slowly once the pump is started.
ŸIf pressure gauge is installed, check the , working pressure of pump.
4. Control the operation of the pump
ŸLimit pump starts to no more than 100 times per hour;
ŸNote that when the flow is too small the pump will over-heat and if flow is
larger, it will cause motor to overload.
ŸDuring operation if the pump is noisy, stop and check it immediately.
5. For good maintenance, the pump should be regularly checked for the
following
ŸWork pressure and operation pressure;
ŸPossible leakage;
ŸMotor overheating;
ŸCondition of inlet filter (if fitted);
ŸThe disconnection time of Motor overload;
WARNING
Match pump selection to the duty required

14
ŸThe disconnection time of motor overload;
ŸThe frequency of starts and stops;
ŸAll the control operations;
WARNING
When pump is unused for a long time, it should be
cleaned and stored properly.

15
6. TROUBLE SHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
Motor won’t
start
Power Source Error
The fuse is broken
Check the power source
Replace the fuse
Motor overheating protection
(display E13)
A f t e r c o o l i n g , p u m p w i l l
automatically start
Motor damaged Co n su l t s e rv i ce pro v id e r o r
maintenance service
Motor lead plug is not inserted or
lead is loose( display E4)
Connect the lead-wire to re-plug the
plug
Dry run protection ( display E1) Pump will restart every 30 minutes
and when water is available the
pump will resume operation
Inlet pressure sensor is damaged
(display E5) or plug is not inserted Replace the inlet pressure sensor or
re-plug
Outlet pressure sensor is damaged
(display E6) or plug is not inserted Replace the sensor or re-plug the
plug again
Voltage operating range is outside
limit, motor will be protected.
(display E6)
Adjust the voltage or wait for supply
to stabilize then restart the pump
Motor is stalled (display E3) Check whether the pump has a
foreign body stuck and clear
Drive error (display E8)
Long press the set button to switch
between Manual / Auto , if the error
is not resolved, repair or change.
Drive board overheat error (display
E12)
T h e p u m p w i l l s t o p a n d
automatically troubleshoot after
cooling

16
PROBLEM POSSIBLE CAUSE SOLUTION
The inlet pipe is too small Increase the inlet pipe
At the pump inlet, there is not
enough water
Increase water or switch off until
correct level is attained
Inlet pressure is too small compared
to water temperature, pipe loss and
flow
Improve the system, increase inlet
pressure
Part of pipe is clogged Check and clean
Uneven water
flow
Pump rotating in wrong direction
Inlet pipe, filter, bottom valve or
pump body is clogged
Clean the pipe, bottom valve, filter
or pump body to remove debris
Incorrect model selection Select the suitable model
The pump is
running but the
water output is
low a nd t h e
pressure
insufficient
Correct motor rotation by changing
any two cables
Low motor voltage or the wire is too
long
Check the motor voltage or increase
the wire cross section
Impeller worn out Replace the impeller
Mechanical seal leaking Clean or replace mechanical seals
Outlet pipe leak Check and repair the outlet pipe

17
PROBLEM POSSIBLE CAUSE SOLUTION
Impeller damage Replace the impeller
Suction pipe air leakage Check the inlet pipe and the
connections 's sealing.
The motor is
running but no
water output
Pump body is not full filled with water Open the vent screw, expel the air
front pump chamber and inlet pipe
Water level is low Adjust the inlet pipe to immerse the
foot valve into the water
The inlet pipe is clogged Check and clean up
Bottom valve or check valve is in the
closed position Open the valve
The inlet pipe is too small or part is
clogged Increase and/or repair the inlet line
The mechanical part of the pump is
rubbing against hard surface Check and repair the pump
P u m p h a s
a b n o r m a l
vibration and
noise
Inlet pipe leaking Check and correct the water inlet
pipe
The inlet pipe or pump has air Fill water again and remove the air
Base is not stable Sturdy the base, tighten the bolts
Outlet pipe leaking or faucet drip
(display E2)
Check the water pipe, repair/replace
the faucet
Pump starts
frequently
Water flow is too small Increase water flow

18
ii) Standard Warranty
General Terms
If equipment failure occurs in the normal course of service having been
competently installed and when operating within its specified duty limits
warranty will be provided as follows:-
• Up to two years - The item will be replaced or repaired at no
charge.
ŸOver two years, less than three years - The item will be replaced or
repaired at a cost to the customer of 50% of the Davis & Shirtliff
market price.
The warranty on equipment supplied or installed by others is conditional
upon the defective unit being promptly returned free to a Davis &
Shirtliff ofce and collected thereafter when repaired. No element of site
repair is included in the warranty and any site attendance costs will be
payable in full at standard chargeout rates.
7. TERMS OF WARRANTY
i) General Liability
• In lieu of any warranty, condition or liability implied by law, the liability of
Dayliff (hereafter called the Distributor) in respect of any defect or failure
of equipment supplied is limited to making good by replacement or
repair (at the Distributors discretion) defects which under proper use
appear therein and arise solely from faulty design, materials or
workmanship within a specified period. This period commences
immediately after the equipment has been delivered to the
customer and at its termination all liability ceases. Also the warranty
period will be assessed on the basis of the date that the Distributor is
informed of the failure.
• This warranty applies solely to equipment supplied and no claim for
consequential damages, however arising, will be entertained. Also
the warranty specifically excludes defects caused by fair wear and tear,
the effects of careless handling, lack of maintenance, faulty installation,
incompetence on the part of the equipment user, Acts of God or any
other cause beyond the Distributor reasonable control. Also, any repair
or attempt at repair carried out by any other party invalidates all
warranties.

INS501A-12/22