DI/DIN

Multistage Centrifugal Pumps

Installation &
Operating Manual
INDEX

1. MODEL NUMBERING AND NAMEPLATE 1

2. PUMP APPLICATION 1

3. TECHNICAL DATA 3

3.1 Temperature 2

3.2 Minimum inlet pressure - NPSH 2

3.3 Minimum nominal flow rate 3

3.4 Number of start per hour 3

3.5 Maximum operating pressure 4

4. INSTALLATION 5

5. ELECTRICAL CONNECTIONS 6

6. START-UP 7

7. MAINTENANCE 8

8. TROUBLE SHOOTING 9

9. WARRANTY 11

© Davis & Shirtliff Ltd 2014

Contents herein are not warranted
Thank you for choosing Dayliff DI/DIN pump. The pump has been
manufactured to the highest standards and if operated correctly
should give many years of efficient and trouble free service. Careful
reading of this instruction manual is therefore extremely important
and if you have any queries please refer them to your retailer.

1. MODEL NUMBERING AND NAMEPLATE

DI/DIN 5 16 SQQE

Code for Shaft Seal

Number of stages
Nominal flow (m3/h)
Model: DI-cast iron suction and delivery chamber
DIN-AISI 316 stainless steel suction & delivery
chamber
1. Pump Model
2. Rated Power
3. Speed
4. Maximum Head 1
5. Optimum Flow 3
5 4
6. Optimum Range
6
7. Serial Number 2
8
8. Current 7

2. PUMP APPLICATION
These pumps are not designed to be used with abrasive, solid
containing, explosive and corrosive liquids. For special application,
WARNING
please contact your supplier or the factory.

Dayliff DI/DIN in-line booster pumps are designed for a wide range of
applications in various industries – for water treatment, water boosting, water
supply, cooling, cleaning, etc. The pumps are designed for use with clean, viscous
and non-explosive liquids that do not contain abrasive matter.

1
3. TECHNICAL DATA
3.1 TEMPERATURE
If ambient temperatures are above +400C, the motor's output must
be decreased to compensate for less effective cooling, and may have
to be replaced with a bigger size motor.
WARNING

• Ambient temperature: 0°C to +40°C.

• Liquid temperature: -15°C to +120°C

3.2 MINIMUM INLET PRESSURE - NPSH

Stop operation of the pump if cavitation occurs. Cavitation will cause

pump damage which is not subject to warranty.
WARNING

To avoid cavitation, make sure that there is a minimum pressure on the suction
side of the pump.

NPSHA: Net Positive Suction Head Available

The net positive suction head available is a function of the pump suction
arrangement.

NPSHR: Net Positive Suction Head Required

The net positive suction head required is a function of the pump design at the
operating point as given on the pump performance curve.

NPSHA=Ha-Hs-Hf-Hv-Hst
Ha: Standard barometric pressure at sea
level (10m at sea level)
Hs: Suction lift.
Hf: Friction loss in suction pipe.
Hst: Safety margin (minimum: 1m head)
Hv = KT+KH: Vapor pressure where;
K T :Flow resistance due to liquid
temperature.
KH: Flow resistance due to elevation above
sea level. If the liquid is water, consult the
tables below to determine the values of KT
and KH.

2
NPSHA ≧ NPSHR: Pump running will be fine.
NPSHA ＜ NPSHR: The pump will be dry running or cavitating.

T (0C) 20 30 40 50 60 70 80 90 100 110 120

KT (m) 0.2 0.4 0.8 1.3 2.2 3.3 5 7.4 11 15 22

H (m) 0 500 1000 1500 2000 2500 3000

KH (m) 0 0.55 1.1 1.65 2.2 2.75 0

3.3 MINIMUM NOMINAL FLOW RATE

Do not run the pump against a closed discharge valve for longer
than a few seconds.
WARNING

• To prevent overheating of the internal pump components, the pump should not
be used at flows below the minimum flow rate.
• The curve below shows the minimum flow rate as a percentage of the nominal
flow rate in relation to the liquid temperature.
40

30
Qmin (%)

20

10

0
40 60 80 100 120 140
t (C0)

3.4 NUMBER OF STARTS PER HOUR

• Motors up to and including 4 kW: Maximum 100 times per hour.
• Motors of 5.5 kW and up: Maximum 40 times per hour.

3
3.5 MAXIMUM OPERATING PRESSURE
Maximum Operating Maximum Inlet
Stages Stages
Pressure Pressures
DI/DIN1
2-36 25 bar 2-36 10 bar
DI/DIN3
2-29 10 bar
2-36 25 bar
31-36 15 bar
DI/DIN5
2-16 10 bar
2-36 25 bar
18-36 15 bar
DI/DIN10
1-16 16 bar 1-6 8 bar
17-22 25 bar 7-22 10 bar
DI/DIN15
1-10 16 bar 1-3 8 bar
12-17 25 bar 4-17 10 bar
DI/DIN20
1-10 16 bar 1-3 8 bar
12-17 25bar 4-17 10 bar
DI/DIN32
1-7 16 bar 1-4 4 bar
5-10 10 bar
8-14 30 bar
11-14 15 bar
DI/DIN45
1-5 16 bar 1-2 4 bar
6-11 30 bar 3-5 10 bar
12-13 33 bar 6-13 15 bar
DI/DIN64
1-5 16 bar 1-2 4 bar
2-4 10 bar
6-8 30 bar
4-8 15 bar
DI/DIN90
1-4 16 bar 1-1 4 bar
2-3 10 bar
5-6 30 bar 3-6 15 bar
DI/DIN120
1-2 10 bar
1-7 30 bar 2-5 15 bar
6-7 20 bar
DI/DIN150
1-1 10 bar
1-6 30 bar 2-4 15 bar
5-6 20 bar

4
4. INSTALLATION
Always refer to the local or national regulations and codes relating to the selection
of the installation site, the water and power connections, etc.
• Pumps should be installed in a protected environment, not exposed to
inclement weather. Make sure that there are no obstructions to prevent proper
motor cooling.
• Pumps must be secured to a solid foundation by bolts through the holes in the
flange or base plate.
• When positioning and installing the pump, follow the installation advice below
in order to avoid pump damage.

Pump Position Motor Cooling

Suggested Piping Layout Piping Connections

Suction Layout

5
 Position Description

1 Pipe support: Support piping system properly to avoid stresses on connections.

On-off valves: Install on-off valves for easy access- before the pump intake and after the
2 pump discharge.
Use flexible piping on both input and output sides of the pump to reduce vibration and
3
transmission of noise.
Check valves will prevent return flow of pumped liquid when pump is stopped, reducing the
4
danger of pump damage
Control Panel: Use high quality components. Make sure that the panel conforms to local
5
standards and regulations
6 Do not place elbows next to the pump intake and discharge
If pump needs to be operated in a situation that will result in cycling install a bypass line
7 to avoid damaging the pumping system
If it is necessary to increase the diameter of the suction pipe, place an eccentric reducer
8 between the check value and the flexible pipe section

9 Using elbows will increase the flow resistance. Wide bends will result in lesser flow resistance

10 The piping must have a level or positive gradient to prevent the formation of air pockets

Diameter of the suction pipe should be bigger than the diameter of the pumps suction
11 port

12 Use a foot valve in case of negative suction head

13 Ensure suction lift is within limits . As a rule suction lift should be minimised

Place the intake of the suction pipe so that the intake is always submerged to prevent entry
14
of air
15 Install a compound gauge at the pump suction and a pressure gauge at the pump discharge

5. ELECTRICAL CONNECTIONS
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
WARNING
and that the following guidelines are followed

• All electrical connection should be in accordance with the local regulations

and made by a qualified electrician.
• Make sure that the supply voltage, frequency and phase supply are suitable for
the motor used.
• Before proceeding, make sure that all the connections are grounded and well
insulated.
• Overload protection should be provided.
• To connect, proceed as shown on the inside of the terminal board cover.

6
• The terminal box can be turned to four positions.
• Check the direction of rotation (Three-phase motor only).
• Make sure that the controls are properly grounded.
• To avoid the possibility of dry running, the installation of dry running protection
is strongly recommended.

6. START UP

Dry running can damage the pump bearing and shaft seal.

WARNING

The pump and suction pipe should be filled with the liquid to be pumped before
start-up to prevent dry running at start-up.
• Close the discharge valve.
• Fill pump casing with water through the
priming plug. (See Pump Priming)
• Start the pump and check the direction of
rotation of the motor (Three –Phase motors).
• Slowly open the discharge valve. The pump
must run smoothly and noiselessly. If not it
may be necessary to re-prime the pump.
• Check the current drawn by the motor. If Pump Priming
necessary, adjust the setting of the thermal
relay.
• Open the air release valve on the top of the
pump outlet and bleed any trapped air. (See
Air Bleeding)
• For DI/DIN1, 3 & 5 pumps, it is advisable to
open the bypass valve during start-up. The
bypass valve connects the suction and
discharge sides of the pump, thus making Air Bleeding
the filling procedure easier. When the
operation is stable, the bypass valve can be
closed.
• If the pumped liquids contains air, it is advisable to leave the bypass valve open
if the operating pressure is lower than 6 bar.
! If the operating pressure constantly exceeds 6 bar, the bypass valve must be
closed. Otherwise the material at the opening will be worn because of the high
liquid velocity.

7
7. MAINTENANCE

Before starting maintenance work on the pump, the motor, or other

parts of the system, make sure that the power supply has been
WARNING switched off.

• The pump does not have a recommended maintenance schedule. However,

periodically, recommended monthly the installation should be visually
checked and pump operation monitored for leaks, noise or vibration. Also the
electrical installation should be inspected and the pump operating current
checked. Any operational defects should be rectified accordingly.
• If the motor is fitted with grease nipples, then the motor should be lubricated
with a high temperature lithium-based grease. If not, then the motor does not
require regular maintenance.
• If the pump and motor are used infrequently with long intervals of non-
operation, then it is recommend that the motor be greased.

8
 8. TROUBLE SHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
Check connections or restart the power
Supply failure or no power supply
supply

Main contacts in motor starter are not Reconnect or replace contacts or

making contact or the motor coils are magnetic coil
defective

Pump or auxiliary circuits protection Replace fuses

fuses blown
Pump does not
run when the Pump or piping system may be
Clean the obstruction and restart pump
motor starter is obstructed
activated
Motor has burst out Replace or rewind the motor

Motor protector or thermal relay has

Reset the motor or thermal protector
tripped out

Check the water level in the tank or the

water system pressure. If everything is in
Tripping of dry running protection
order, check the protection device and
its connection cables

Overload setting is too low Set the motor starter correctly

The cable connection is loose or faulty Fasten or replace the cable connection

Starter overload
trips mmediately Pump is jammed Check and rectify
pump switched
on Contacts in overload are faulty Replace motor starter contacts

The motor winding is defective Replace or rewind the motor

Low voltage (especially at peak time) Check the power supply

The system’s
general
Short circuit Check electrical system
protection cuts
in

The voltage is not within the motors Check the operating conditions of the
operating limits pump
Pump starts but
after a short time, The control panel is situated in an Protect the control panel from heat
the thermal excessively heated area or is exposed sources and direct sunlight
overload trips out to direct sunlight
or the fuses blow
A phase in the power supply is missing Check the power supply

9
PROBLEM POSSIBLE CAUSE SOLUTION
Worn motor bearings causing motor Replace motor bearings
to overheat

The pumps delivery rate is higher than Partially close the on-off valve located
the specified rate on the pump nameplate discharge side until the delivery rate
The pump starts up
returns to within the specified limits
but after a period
of time, the
There are obstructions inside the pump Disassemble and clean the pump and
thermal overload
or pumping systems piping
trips
Check the actual power requirements
Less viscous liquids may cause the motor
based on characteristics of the liquid
to work too hard and overload the motor,
being pumped and replace the motor
causing the motor to overheat
accordingly

Pump is not primed with liquid Fill the pump with the liquid to be
pumped

The pump, suction or discharge pipes Clean the pump, suction or discharge
are blocked by solids in the liquid being pipe
pumped

The foot or check valve is blocked or Replace the foot or check valve
Pump runs but no
has failed
water delivered
Repair or replace the suction pipe
The suction pipe leaks

Removed trapped air from the system

Air is in the suction pipe or pump

Motor operating in wrong direction Change the direction of rotation of the

(three-phase motor) motor by reversing motor connections

The pump draws in air or the inlet

Improve the suction conditions
pressure is too low
The pump
capacity is not
constant The pump or the suction side of the piping
Clean the pump or suction pipe
system partly blocked by foreign bodies

The pump rotates The foot or the check valve has failed Check and replace check valve
in the wrong
direction when
switched off Leakage in the suction pipe Repair or replace the suction pipe

10
9. TERMS OF WARRANTY

i) General Liability
! 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.

ii) Standard Warranty

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 office
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.

11
INSXXXA-11/14