DAYLIFF DWY370 Installation instructions

DWY
Submersible Drainage Pumps
Installation &
Operating Manual

SPECIFICATIONS
1.
1
2.
SYMBOLS & WARNINGS 2
WIRING
3.
3
INSTALLATION
4.
3
TROUBLE SHOOTING
5.
5
INDEX
© Davis & Shirtliff Ltd 2023
Contents herein are not warranted
MAINTENANCE & SERVICE
6.
6
TERMS OF WARRANTY
7.
7

1
1. PUMP SPECIFICATIONS
Congratulations on selecting a Dayliff DWY Submersible Drainage
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.
PUMP HEAD (m)
0
5
10
15
20
25
30
5 10 15 20
35
25 30 35 40 45 50
DWY750H
DWY750L
DWY1500
DWY550
3
FLOW RATE (m /hr)
DWY370
PUMP
The Dayliff DWY range of portable submersible pumps are designed for well pumping and
drainage of clean water containing minimal impurities for domestic and small scale water
supply applications. They are of closed impeller type, all major components being
manufactured from cast aluminium. All models are supplied with 8m of cable and level
switch for automatic operation
MOTOR
Pumps are supplied with two pole single phase squirrel cage motors with integral thermal
overload protection and can be directly connected to the mains through a 10A fuse or
MCB (13A for 1.5kW motor)
Enclosure Class:IP68 Insulation Class:F Voltage:1x240V
Speed:2850rpm
OPERATING CONDITIONS
Pumped Liquid: Thin, clean, chemically non-aggressive liquids with max. sand content
of 0.1%
Max. Fluid Temperature: +40°C
Max. Ambient Temperature: +40°C
Max. Immersion Depth:10m
Particle Size: <1.1kw; ≤3.3mm and >1.5kw; ≤5.5mm

2
PUMP DATA
2. SYMBOLS & WARNINGS
WARNING
Pump must be reliably grounded before using. Must be installed
with leakage protection, overload and over current protection
device.
WARNING
Running the pump without must be avoided.
WARNING
Never touch the water near the pump when it is running.
WARNING
To prevent electric shock, turn off the power before maintaining
and cleaning the electric pump.
DWY370
Motor
Model Current
(A)
DWY750L
DWY750H
DWY1500
kW HP
0.37
0.55 0.75
0.5
4.2
2.8
0.75 1 6.1
1.5 2 9.1
6.3
Dimensions (mm)
W H L
DN
(”)
75
80
195
235
340
380
1
2
95
90
235
270
390
465
1
3
85 230 390 1.5
Weight
(kg)
7
10
11
20
11
DWY550
H
W
L
DN

3
3. WIRING
With Capacitor Connection
4. INSTALLATION
! After unpacking, check if there is any damage on the pump during transportation
and storage, for example, if the cables or plugs are intact, if the joints are tight
without oil leakage etc.
! Before using the pump, check that the insulation resistance and the cold insulation
resistance is less than 100M .
! Prior to installation, check if the inner diameter of the well
matches the minimum diameter of the pump.
! For a new well, remove debris and dirt using an air
compressor or an old well pump, then check if the water
quality and temperature matches the conditions of the well
pump. Install the pump only when the water level reaches the
threshold for use.
WARNING
Submersible pump must be used within the range of the
recommended head, so as to prevent motor damage due to
overload operation. To select the pump head, user should
consider pipeline and bend losses.

4
! To install the pump in a pond, hoist it with a tripod.
! Do not place it directly at the well bottom or the motor may ingest mud and cause
blockage or run at high temperature and burn the motor.
WARNING
The submersible depth of electric pump should be about
2m below the dynamic water level, if too shallow, the
pumped quality will be poor due to reduced water level,
even causing motor failure due to running without water
! The electric pump must be used at the right appropriate
voltage.
! If the power supply is far from the place where the electric
pump is used, the extended cables used should be
appropriately sized.
! Before installing the pump in the well, turn on the power for 3s
for test run.
! The cable should be strictly selected as per the wiring diagram
indicated on the motor or the control box and should be wired
by the corresponding colors.
! To lift the pump out of water, user must hold the handle with a
rope.
! When using the pump, use nylon rope to fasten and support
pump in position. Do not use water pipes as they may drop the
pump.
! If float switch or liquid level detector and other protective
measures are not provided, the pump should be installed and
operated by a qualified person, to ensure running with water.
! In case of abrupt reduction of water, abnormal sound or
violent vibration, immediately turn off the power, and stop
using it until the cause is identified and corrected.
WARNING
Incorrect wiring will cause the pump to work abnormally and
may damage the motor.
! When operating the motor, it is preferable to keep the cable
off the ground, so as to avoid crushing it when heavy
equipment pass on the ground, causing accidents.
WARNING
Never pull the cable at random.

5
5. TROUBLE SHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
No electricity
Plug not inserted correctly
T h e p u m p
d o e s n o t
deliver, water
and the motor
does not start.
Automatic switch tripped
Overload protection tripped Automatically reset after the
motor has cooled
Current protection tripped The micro circuit breaker resets
automatically
Intake flange obstructed
Delivery pipe clogged
T h e p u m p
d o e s n o t
deliver water
but the motor
is running
Check valve jammed
Water level too low
Await resumption of supply
Check and correct
Check and correct error
Clean intake
Clean delivery pipe
Clean valve
Correct pump installation depth
Intake flange partially obstructed
Clogging in delivery pipes
T h e p u m p
delivers low
water
Incorrect rotation direction Check and correct rotation
direction
Clear intake flange
Clean delivery pipe
Clogging in delivery pipes
T h e p u m p
s t o p s a ft e r
brief periods
of operation.
The built in
o v e r l o a d
s w i t c h i s
tripped
Liquid temperature too high
Foreign bodies prevent the pump
from rotating freely
Internal defect
Clear dirt and debris
Clean delivery pipes
Wait for water to cool
Return product back to Dayliff
retailer for repair

6
6. MAINTENANCE & SERVICE
In any of the following circumstances, stop the pump immediately and restart only
after the environmental conditions are improved or the problems solved
! If the working current of the pump exceeds the rated current of the motor
! If the pumping amount is abnormal, water is intermittently pumped with increased
sediment concentration.
! If the insulation resistance of the motor is less than 0.5 M .
! If the unit has obvious noise with intensified vibration
! If the grid voltage is inadequate and the protection mechanism of the motor is
frequently triggered.
! If the water pipeline is damaged.
Before repairing and servicing, make sure that the pump is flushed with clean water.
The normal operation of the pump should be checked at least once a year. If the liquid
pumped is turbid or the sediment concentration is large, shorten the time intervals of
checking the pump.
The following points should be checked:
! Energy consumption: if there is anomaly, check if the circuit is significantly
increased.
! Oil condition: if the oil contains water, there may be a leakage of mechanical seal.
! Cable: make sure that the cable is still sealed without obvious bending or shrinking.
! Over-current: check if the impeller or pump housing is worn.
! Bearing: check if the bearing is damaged or its rotation inflexible.

7. TERMS OF WARRANTY
i) General Liability
ii) Standard Warranty
7
• 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 Distributor 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 Distributors reasonable control. Also, any repair
or attempt at repair carried out by any other party invalidates all
warranties.
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:-
ŸUp to one year - The item will be replaced or repaired at no
charge.
ŸOver one year, less than two 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.
Also proof of purchase including the purchase invoice must be provided for
a warranty claim to be considered

INS530A-03/23