DAYLIFF DZ Series Installation instructions

DZ
DRAINAGE PUMPS
Installation &
Operating Manual

PUMP SPECIFICATIONS
1.
1
2.
INSTALLATION 3
ELECTRICAL CONNECTIONS
3.
3
PRIMING
4.
3
OPERATING & MAINTENANCE
5.
3
INDEX
© Davis & Shirtliff Ltd 2020
Contents herein are not warranted
TROUBLE SHOOTING
6.
5
WARRANTY
7.
7

Congratulations on selecting a Dayliff DZ Pump. 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.
DAYLIFF DZ self-priming waste water pumps are of semi-open impeller axial flow type
designed for pumping water containing high solid levels with particular application
for site drainage, sewage and general effluent duties. They are of heavy duty design
and feature a non-return valve on the suction, easy opening cleaning ports and a
mechanical seal. Construction is of cast iron throughout.
MOTOR
Pumps are close coupled to non-overloading TEFC motor designed for continuous
duty. A remote DOL starter with thermal overload is necessary for motor control.
Enclosure Class: IP56 Insulation Class: F
OPERATING CONDITIONS
Pumped liquid: Thin, chemically non aggressive liquids with a viscosity of up to
2
50mm /s containing suspended solids and particles up to the size indicated.
0 0
Working Liquid Temperature: - 10 C to +-80 C
Maximum Working Pressure: 6 bar
Maximum Particle Size: 50mm
1
1. PUMP SPECIFICATIONS
3
FLOW(m/hr)
HEAD (m)
0 10 20 30 40 50 60
10
5
20
25
15
30
PUMP

UPWARD SLOPE
TO SUCTION
Foot Valve
Max 6m
Min 50cm
L
H1
H2
W
HP
Weight
(kg)
ŸSite in a dry, well ventilated and weather proof
location with an ambient temperature less than
0
40 C. Ensure good ventilation for motor cooling.
ŸLocate on a solid flat surface ensuring the shaft is in
a horizontal position.
ŸEnsure that the diameter of the suction pipe is at
least the size of the pump suction inlet. If the suction
depth exceeds 4 meters then a one size larger
diameter pipe should be used, though for maximum
pump performance suction height should be
minimised.
ŸIf there is negative suction (i.e. the pump is above the suction water level) the
suction pipe must be slightly angled upwards towards the pump inlet to avoid the
formation of air locks. It must also be immersed in water by at least 0.5m to avoid
vortexes.
ŸEnsure that all suction pipe connections are completely airtight or else the pump
will not operate.
ŸThe diameter of the delivery pipe must be chosen to suit the flow rate and pressure
required at the delivery point though must not be smaller than the pump outlet size.
It is also advisable to fit an isolating valve on the delivery outlet. This measure is
essential if the delivery pressure exceeds 10m.
2
2. INSTALLATION

3
3. ELECTRICAL CONNECTIONS
4. PRIMING
WARNING
WARNING
ŸAll piping must be supported with suitable brackets to avoid transmitting stress to
the pump body. Care must also be taken not to cause damage by over tightening
the pipes during fitting.
ŸCheck alignment of the couplings of both pump and motor before use.
Misalignment will damage flexible components and cause noisy vibrations.
The installer is responsible for making electrical
connections to the mains supply in compliance with
relevant local regulations. Ensure that a professional
electrician carries out the electrical connections and that
the following guidelines are followed:-
Serious damage will occur if a
pump is not properly primed
and runs without water.
ŸAll installations must be provided with an isolator to cut off mains power
supply and coarse current protection in the form of a fuse or MCB rated at
2-3 times the full load current as given on the pump plate.
ŸEnsure that the power supply rating complies with the specification on the
pump rating plate.
ŸElectrical connections must be made according to details in the pump
junction box cover and effective earthing must be provided according to
local regulations.
ŸSingle-phase motors are protected against overloads by a thermal
overload fitted in the motor windings. Three phase motors must be fitted
with remote starter.
ŸThe direction of pump rotation should be clockwise viewed from drive end.
When first installed the pump must be filled with
water at the priming port. Because this pump is
self-priming, subsequent priming after
installation is not necessary.

4
5. OPERATION AND MAINTENANCE
Upon starting, carefully check the pump for normal operation including water
flow, leakage, vibrations and noise. Abnormal situations should be rectified
immediately. Pumps do not require routine maintenance provided the
following precautions are taken:-
ŸEnsure regular flushing of the pump with clean water to prevent build up of
waste.
ŸIf the shaft does not run freely, release it using a screwdriver by inserting it in
the special slot on the rear of the pump shaft. If this is not sufficient to solve
the problem remove the pump body by unscrewing the relevant mounting
bolts and clean it thoroughly to remove any encrustation.
ŸThe pump is fitted with two ports in the pump body for cleaning the impeller
and pump chamber in case impeller rotation is impeded by solids and
waste. These should be opened and the waste removed if pump
performance deteriorates.
ŸIf the pump is to remain unused for long periods of time it is advisable to
empty it completely, disassemble into spare parts, lubricate with Calcium
Base grease or SAE 20W oil and store in a dry place.
WARNING
Never carry out work on the pump without having first
disconnected from the mains supply.

5
6. TROUBLE SHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
Pump running
but no water is
pumped
Inlet and/or outlet valve not open, pipe
or impeller channel clogged
Wrong direction of motor rotation,
motor phase deficiency, low speed
Air leak in inlet pipe
Air inside pump chamber
Not enough water from suction, suction
lift too high
Pipe pressure too high, improper pump
model
Open valve, clean
Change motor rotation, tighten motor
connection
Check connection, drain air
Open air bleeding port to release air &
repriming
Check and adjust suction lift
Put pipe straight, select new pump model
Pump running
and there is noise
and vibration
Not enough
delivered water
Support foot not stable
Shaft bent
Cavitation
Bearing worn out
Suction pipe clogged
Misalignment of pump and motor
Fix support foot
Adjust or replace shaft
Check suction
Replace bearing
Clean pipe
Align accordingly
Impeller channel and/or inlet pipe
clogged, valve not open enough Clean channel, adjust valve opening
Impeller or wear plate worn out Replace worn out parts
Shaft power
overrating
Working flow too high
Suction lift too high
Pump shaft bent
Diffuser channel clogged
Adjust working flow, turn down outlet
valve
Reducing suction lift
Straighten shaft
Clean diffuser channel
Motor runs
hot
Working flow too high
Mechanical resistance in bearings or
impeller
Motor bearing damage
Voltage too low
Adjust working flow, turn down outlet
valve
Check pump and bearing
Replace bearing
Check and adjust
Water leakage in
pump
Mechanical seal worn
Crack or hole in casing
Sealing surface not smooth
Fasteners loose
Replace seal
Replace casing
Reseal
Tighten

PROBLEM POSSIBLE CAUSE SOLUTION
Over current
Wait for supply to stabilise
Unbalanced current and voltage
Significant voltage drop
Inspect connections
Motor phase malfunction
Correct rotation
Reverse rotation
Replace pump with low head pump
Lower head. Excessive volume of water
Remove foreign matter
Foreign matter clogging pump
Replace bearingMotor bearing worn or damaged
Correct rotation
Reverse rotation
Check electrical connections
Electrical fault
Recalculate and adjust
Discharge head is high
Resize pipe
High frictional loss
Raise water level or lower pump
Air suction
Inspect and repair
Leaking from discharge pipe
Remove foreign matter
Clogging of discharge pipe
Remove foreign matter
Foreign matter in suction inlet
Remove foreign matter
Foreign matter clogging pump
Replace impeller
Worn out impeller
6
Does not pump
a d e q u a t e
volume

7. TERMS OF WARRANTY
7
i) General Liability
ii) Standard Warranty
• In lieu of any warranty, condition or liability implied by law, the
liability of Davis & Shirtliff (hereafter called the Company) in
respect of any defect or failure of equipment supplied is limited to
making good by replacement or repair (at the Company's
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 Company 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
Company's 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:-
• Up to two years - The item will be replaced or repaired at no
charge.
• Over 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.

INS216F-03/20