dooch

DHF(T) Series

Horizontal Multi-stage Stainless Steel Centrifugal Pump

Operation Instruction Manual

1.Confirming Items 01-01
2.Definition ofModel 02-02
3.Application fields 02-02
4.Technical Data 02-03
5.Installation 03-06
6.Electrical Connection 06-06
7. Pump Start and Stop 07-07
8.Pump Assemblyand Disassembly 07-08
9.Pump Maintenanceand Repair 08-08
10.Frost and Frozen season protection 08-08
11.Trouble-shooting Lists 09-09
12.DHF(T)1、2、3、4、5ExplodedView 10-10
13.DHF(T)10、15、20 ExplodedView 11-11

●1 Confirming Items

After pump arrive to site,need to confirm following items:

1.1Remove the package,to confirm the model number if matches with the name plate and purchase order. (Name plate position see below),and confirm thecorrect electrical and earth connection toprevent the accident.

dOOCh HORIZONTAL MULTISTAGE PUMP
MODEL:m³/h H: 1 m/h H: mP: kWV AMotorType: OIP：55 INS.CL: Date：μF VAC μF VAC
Serial No.:
（） www.doochpump.com

dOOCh HORIZONTAL MULTISTAGE PUMP CE MODEL: N Q： m/hH： m ZHOS Q： m²/hH： m O Power: kW Eff.: Power: kW Eff.: O V A V A MotorType: CONN.: IP55 INS.CL : F Mfg.Date: S/N （） www.doochpump.com

Nameplate:Three-Phase

Name plate:Single-Phase

1.2 Transportation and Lifting

Thepumpis suitable for human transport orsimilar vehicles suchas forklifts,transportto ensure the safety， recommended the use of suitable lifting tools for transportation and lifting.

1.3 Check if there is any damage during the transportation and confirm whether the nutis loose during transportation.

·2DefinitionofModel

DHF(T)1，2，3，4，5，10，15，20 definitionof model:

●3Application Fields

1) House,building water supply,Boiler feeding waterand Fire-Fighting pump.
2)Apartment heating system water circulation pump.
3)Water supplysystem for liquid deliveryand booster pump.
4) Industrial equipment system of liquid circulation, transportation and pressurization.
5)R/O filter equipment used as for ejector.
6) Manufacturing engineering equipment,high pressure washing equipment,beverage production equipment
and other pumps.

Transferred liquid by Pump

1)Thin,cleanand non-flammable liquids,free of solidparticlesand fibers.
2)To ensure pumped liquid willnot chemically cause the pump material to be corrosive.
3)Ifallthe Equipment systemmaterial made bystainlesssteel which components in contact with liquid,DHF model pump recommended to apply
4)If thespecific gravityorviscosityoftheconveying mediumis higherthan water,pleasecontact themanufacturer,to recalculate the motor power according to the specific gravity and viscosity.

·4Technical Data

4.1Ambient temperatureandaltitude

1) DHF-type pump'sambient temperature is from + 5 ^ { \circ } C to + 4 0 ^ { \circ } C ,the maximum altitude of 1 0 0 0 { m } ifthe ambient temperature exceeds the above temperature or pump installed above the maximum altitude,the motor must not be fully loaded run,otherwise will cause the danger of overheating. 2)Overheating is mainly caused byoverheating of ambient temperature or lowair density leading to poor motor cooling effect.In this case,higher power motor should be chosen.

Motoroutput power (percentage)and the relationship betweenambient temperatureand altitude

3)If both the maximum temperatureand the maximum altitudeexceed thealowable range,thepercent age of output power of motor reduction should be calculated by times of two numbers.

4.2Minimum InletPressure

Themaximumsuctioninmeters can be calculated by following formula:

Pb \mathbf { \tau } = \mathbf { \tau } Atmospheric pressure in bar.
NPSH \mathbf { \sigma } = \mathbf { \sigma } Pump's NPSH can beread from the pump's maximumflowrateintheperformancecurvemarked in the catalogue.
Hf \mathbf { \sigma } = \mathbf { \sigma } Friction loss in the water inlet pipe at the maximum flow rate required by the pump.
Hv \mathbf { \sigma } = \mathbf { \sigma } Gasification pressure of the transport medium at servicetemperature.
Hs \mathbf { \sigma } = \mathbf { \sigma } Safety margin,to take O.5metersas thesmallest.

IfthecalculatedHispositivenumber,themaximumallowable suction lift for the pump is Hmeter. If thecalculated Hnegativenumber,theminimum inlet pressure should be required to reach H meter.

4.3Maximuminlet pressure

The maximum allowable inlet pressure for the pump is stipulated on page O4 in the catalogue.

4.4The temperatureof the conveyingmedium

Pump's conveyingmedium temperature range from - 1 5 ^ { \circ } C to + 1 1 0 ^ { \circ } C 元

●5 Installation

Wheninstallng thepump,thepumpmustbedrlledonahorizontal,smooth hardfoundationandbolted,according to the following procedures for installation.

Step 1

Toconfirm thedirection of inletand outletofmedium.

Step 2

To check the pump catalogue,to determine the distance between the pump inlet and outlet,center height,size and distance of anchor bolt and other parameters, the pipeline and the foundation must be matched with the catalogue size.

Step 3

Pump installed as shown，but the motor cannot be installedbelowthe installation level,also cannot be installed upside down.

Step 4

In order to reduce noise,it is advisable to install expansionjointsonbothendsof thepump.Installisolation valves ateach end of the pump to prevent system discharge if pumpcleaning,maintenance,and replacement are required.

Step 5

Ensure no cavitation during pipe installation,especially on the suction side of the pump.

Step 6

If installationappearedoneofthefollowing features, installavacuumvalveintheimmediatevicinityofthe pumpsuggested.

1) The discharge line slides down in the direction away from the pump. 2) Siphon phenomenon may occur. 3)Necessaryto stop the backwash of unclean water.

5.1Foundation

We recommend installng the pump ona concrete foundation,which must be sufficient to provide a permanent, consistentsupportof thepumpasawhole.The foundationmustbeable toabsorb vibration,normal stress or impact.Theconcretefoundation mustbeabsolutely horizontalandthesurface flat,with the pumpon the foundaThe explanation of the length,width, height of foundation:

Lengthandwidthof foundationmustbeover 2 0 0 ~ \mathsf {mm } ormore than the pump base. The basic weight must be greater than 1.5times the total weightof the pump.The minimum height of the foundation can be calculated based on the concrete weight,densityand foundation length and width.

h _ { { { r } } } = / { m _ { { { p u m p } } } x 1 . 5 } { L _ { { { r } } } x B _ { { { r } } } x \ell } Concretedensity6 usuallycalculated based on 22ookg/m

Installation innoise-freeoperation is particularly important,it is recommended thatfoundation weight should be 5 times than thepumpweight.After the foundation bolts placed,thepumpcan be placed ona foundationand,if necessaryleveledwithagasketat thispoint tohold thewaterpumpinacompletelyhorizontal position.

5.2Damping to Reduce Vibration

If damping is used,theshockabsorbermustbe mountedunderneath the foundation.Instal theshockabsorber as shown below.

5.3Outdoor Installation

For outdoor installation,arain shelter should be used to coverand protect the motorand pump.

5.4InstallationPrecautions

1)Motorshould be installed inaventilated,dry,ice-free place.

2)In order to facilitate the pumpand motor maintenance,there should allowsuffcient space,with motor 4kW below,pump should be set aside for more than 5 0 0 \mathsf {mm } above the space.Equipped with higher than 5.5kW motor,pumpshouldbesetasidemorethan1meterofspace.

3)During the Pipeline instalation,pipe weight,valve weight,and weightof pipefitings cannot bewithstood on the pump,pipe and pump joints to use seals for sealing.

4)If need to install pressure gauge and flowmeter,the pump inletand outlet pressure measurement pointsare generallylocated in the importflangeupstreamand downstreamof theoutletflange twice thepipe diameter distance,the upstreamof theelectromagnetic flowmeter straight pipe length should be greaterthan 5times Pipediameter distance;the downstream straightpipe length should be greater than 3times the pipe diameter distance;measuring point 4 times the pipe diameter distance,Noany elbowexisted.

5)When the pump is used for self-priming,a water inletplug and a bleeder plug in the drain pipe should be used inorder to facilitate thefilingof liquidand exhaust gas.At the same time,to installte bottom valve, whichatleast 0 . 5 \mathsf { m } below than the liquid surface,see 4.2.

5.5OutletPositionSelection

The pump canbebasedonspecialneeds tochooseadiferent exit location,ifnecessary,please specifyinthe order.See below.

·6 Precaution Notices

6.1Precaution notices

1）Theelectrical connection mustbeoperated byauthorized electrician inaccordancewith local regulations. 2）Beforeremoving the terminal cover to prepare for wiring or before disassemblingand disassembling the pump,make sure that the power supply has been cut off and will not be accidentally connected.
3）The pump must be connected to the mains frequency power switch.
4）The operating voltage and frequencyaremarked on the motor's nameplate toensure compatiblity between themotorand the power supplyand toensure thatthe motor terminal boxisproperly wired.The wiring diagram can be found in the terminal box.
5）Thepumpequipped with frequency converter or electriccontrol cabinet,should follow the instructions manual provided.

6.2The standard assembly of the pump junction box location,see below:

· 7 Pump Start and Stop

7.1 Pump Start

1) Before starting the pump,confirmagain whether the nut is loose during transportation and instalation. Loose nut may cause safetyaccidents.
2)Pump starting procedures should follow steps below:

Step 1

Before turn off the pump,first close isolation valve in the discharge,then turn off the pump power,and finally close isolation valve in the suction side.

Step 2

Remove the water diversion plug and slowly fill the water pump until full filled with fluid and tighten it.

Step 3

Check the correct direction of rotation of the pump from inlet and outlet chamber.

Step 4

Check the rotation direction,To start pump.

Step 5

Slowly open the discharge side isolation valve while starting the pump.

Step 6

If the pump does not reach the rated pressure, repeat the steps above.Other questions please contactthemanufacturerorauthorizeddealer.

Precaution:

1) During thePumpexhaustand waterdiversion,payatention tothewaterspray,donotdamage peopleorother equipment around.

2)Afterstarting the pump,usethe discharge side isolation valve toadjust the performance of the pumpand Do not use the suction side isolation valve.During pump operation,thesuction side isolation valve remains fuly open, Close the pump isolation valve in discharge side and open the suction side isolation valve.

3)The pump is prohibited to runat excess of specified flow rate.

7.2 Pump Stop

Before turnofthepump,firstcloseisolationvalveinthedischarge,thenturnofftepumppowerandfinallyclose isolationvalve in thesuctionside.

·8Pump disassemblyand assembly

Notice:

1)If Pumpfailure,need maintenance,orreplacementoftheshaftsealandthemotor,thepumpneedstobedisassembled and assembled,following instructions should be followed:
2) See theexploded viewof the locationand nameof the pumppartsbelow.

DHF(T)

8.1Precautionsbeforedisassemble

1)Disconnectthe motorfromthe powersupplybefore disassembly,close the isolationvalves on bothsides of the pump and drain the pump.Electrical specifications mustbe observed when removing cables. 2)Before disassembly,be sure to prepare the tools for maintenance and new spare parts for replacement.

8.2Disassemble

1) Remove the four tie rods.
2) Disassemble the inletchamber.
3) Use the tooling to fix the pump shaft on motor hood end and remove the hex nut M8and washer.
4)Remove the impeller,diffuser,spacerand otherpartsin turn.
5)Loosen the set screwon themechanical sealand remove themechanical seal.
6)Take off the outlet chamber.

8.3Assembly

1) Seal the mechanical seal ring with grease infiltration,even force,pressure to the outlet chamber.
2)The outletchamber installed on the motor,payattention tothe direction ofthe water should be the same as
requirements.
3)To grease shaft end,the machine seal ring,spring,tight ring mounted to the shaft.
4) To tight ring until the end, tighten the set screws.
5)According tothepumpmodel,series,inaccordancewithacertainorder,toinstallthe impeler,difuser
spacer,sealsand other partson the pump shaft.
6) Fix the pump shaft at the end of the motor hood with the tooling,tighten the nut.
7)Press the seal ring and seal ring cover into the inlet chamber.
8) Install the inlet chamber,symmetrical tightening rod.
9)Hand turn the motor rotor,should be flexible rotation,no abnormal sound.

●9Maintenanceand Repair

1)Whenmaintenanceand repairthepump,makesureallpower tothepumpbecutoffandwillnotbeinadvertently connected.

2)After Three months of pump continuous operation,pump should be observed with or without performance degradation, noise and others problems,if necessary,to replace the wearing parts. 3)Motorswith grease filling hole,should be filled regularlywith grease.

●10FrostandFrozenProtect

1)If notuseapump during the frostand frozen season,water inside the pump should be empty,to prevent damage.
2) When emptying the pump,loosen the pilot plug and open the drain plug on the inlet chamber.
3)When discharging,payattention tothe directionof the waterspray,to ensure notcauseany harm to personnel and equipment.
4) Do not tighten the water plug and drain plug until the pump re-start.

· 11 Troubleshooting Lists

Precautions:

Beforeremoving the terminal box cover or before disassembling the water pump,makesure thatthe power supply is cut off and cannot be accidentally switched on.

DHF(T)

●12DHF(T)1、2、3、4、5ExplodedView

1.Plug Body
2.0-Ring
3.Inlet Chamber
4.HexSocket Head Cap Screw M8x16
5.Washer8
6.Rod
7.Seal Gasket
8.Non-metallic inserts Hex nuts M8
9.Double stacked self-locking washers 8
10.Compression Washer
11.Seal Ring
12.Seal Ring Cover
13.Impeller
14.Bearing Cone
15.Spacer
16.Support Diffuser
17.Spacer
18.Diffuser
19.Adjusting Pad
20.Mechanical Seal
21.Outlet Chamber
22.Rivet 2x6
23.NamePlate
24.Motor
25.Base
26.Foot Support
27.Washer
28.Nuts

●13DHF(T)10、15、20 Exploded View

1.Plug Body
2.0-Ring
3.Inlet Chamber
4.HexSocket HeadCap ScrewM8x16
5.Washer 8
6.Rod
7.Non-metallic Inserts HexNutsM8
8.Double stacked self-locking washers 8
9.Compression Washer
10.Seal Ring
11.Seal Ring Cover
12a.Ring(DHF(T)10 Without this part)
12.Impeller
13.Spacer
14.Bearing Cone
15.Spacer
16.Seal Gasket B
17.SupportDiffuser
18.Seal Gasket A
19.Spacer
20.Diffuser
21.Adjusting Pad
22.Mechanical Seal
23.Outlet Chamber
24.Rivet 2x6
25.Name Plate
26.Motor
27.Base
28.Foot Support
29.Washer
30.Nuts

DHF_2017.12.28

dooch

ShanghaiSino-KoreaDoochPumpManufactureCo.,Ltd.

No.239ZhangLiantangRoad,Liantang IndustrialPart,Qingpuistrict,hanghaiCityChina. Tel:+86.21.67679390 Fax:+86.21.67679396