dooch

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- 03-07
6.Electrical Connection 07-07
7.Pump Start and Stop -08-08
8.Pump Assemblyand Disassembly -08-09
9.Pump Maintenance and Repair 09-09
10.Frost and Frozen season protection 09-09
11.Trouble-shooting Lists -10-10
12.Attached drawing,DHM Exploded View 11-11

1 Confirming Items

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

1.1 Remove the package,to confirm the model numberif matches with the name plate and purchase order，name plate position see attached (No.23) And confirm the correct electrical and earth connectionto preventtheaccident.Nameplatessee below:

CCHORZONTASILESTAEPUMP dOOCh HORIZONTAL SINGLESTAGE PUMP CE
D m/h H: m m/h H: m MODEL: kw V A ZH09 Oower: m H： m ZHOS Ower: m H： m
OMotorType: O O O
IP:55 INS.CL: Date： V A V A μF VAC μF VAC MotorType: CONN.: IP55 INS.CL: F
Serial No.: Mfg.Date: S/N
（） www.doochpump.com (） www.doochpump.com

Single phase name plat <br>Three phase name plate

1.2 Transportation and Lifting

The pump issuitable for human transport or similar vehiclessuchas forklifts,transporttoensure the safety,recommended the use of suitable lifting tools for transportation and lifting.

1.3 Check if there isany damage during the transportation and confirm whether the nut is loose during transportation.

2Modeldefinition

DHM4、6、10、15、20Definition ofModel

le DHM 15-2.2 (M) With M: single-phase motor Without M: three-phase motor Motorpower (KW) -Ratedflow ( \mathsf { m } ^ { 3 } / \mathsf { h } ) 2 ：Horizontal single-stage centrifugal pump (all stainless steel)

3ApplicationFields

System pressurization,industrial pump,farmingclean water treatment;
Water treatment;
Water circulation system;
Irrigation system;
Other areas;

Transferred liquid by Pump

●Thin,cleanand non-flammable liquids,free of solid particlesand fibers. ●To ensure pumped liquid will not chemically cause the pump material to be corrosive. ●Please re-select suitable motor efficiency when the medium proportion or the viscosity is higher than water.

4 Technical Data

4.1Ambienttemperatureandaltitude

DHF-type pump' sambient temperature is up 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 willcause the danger of overheating. Overheating is mainly caused by overheating of ambient temperature or lowair density leading to poor motor coolin.g effect.In this case,higher power motor should be chosen.

Motor output power (percentage)and the relationship between ambient temperature and altitude

If both the maximum temperature and the maximum altitude exceed the allowable range,the percentage of output power of motor reduction should be calculated by times of two numbers.

4.2Minimum Inlet Pressure

The maximum suction in meters can be calculated by following formula:

H = P _ { b } x 1 0 . 2 - N P S H - H _ { 1 } - H _ { 1 } - H _ { 2 }
\mathsf { P } _ { \mathsf { b } } （204号 \mathbf { \Sigma } = \mathbf { \Sigma } Atmosphericpressureinbar.
NPSH \mathbf { \Sigma } = \mathbf { \Sigma } Pump's NPSH can be read from the pump's maxi-mum flowrateintheperformancecurvemarked in the catalogue.
Hf \mathbf { \Sigma } = \mathbf { \Sigma } Frictionlossinthewaterinletpipeatthemaximum flow rate required by the pump.
Hv \mathbf { \Sigma } = \mathbf { \Sigma } Gasification pressure of the transport medium at service temperature.
Hs \mathbf { \Sigma } = \mathbf { \Sigma } Safetymargin,to take0.5metersasthesmallest.

·If the calculated H is positive number,the maximum allwable suction lift for the pump is H meter. If the calculated H negative number,the minimum inlet pressure should be required to reach H meter.

4.3Maximum inletpressure

Maximumpressure forthesystemis8bar.

4.4The temperature of the conveying medium
Pump's conveying medium (excluding motor) temperature range from - 1 5 ^ { \circ } C to + 8 5 ^ { \circ } C
If ambient temperature is higher than 4 0 ^ { \circ } \mathsf { C } or media temperature surpasses the permissible range, it should be stated in the contract and grease should be(according to motor requirement) filled into the grease hole to lubricate the motor.

5 Installation

When installing the pump,the pump must be drilled ona horizontal,smooth hard foundation and bolted,according to the following procedures for installation.

● Step1

To confirm the direction of inletand outlet of medium.

●Step2

To check the pump catalogue,to determinethedistance between thepump inlet and outlet,centerheight,sizeand distance of anchor bolt and other parameters, the pipeline and the foundation must be matched with the catalogue size.

Step3

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

● Step4

Inorderto reducenoise,itisadvisableto install expansion joints on both endsof thepump.Install isolationvalvesat each end of the pump to prevent system discharge if pump cleaning,maintenance, and replacement are required.

Step5

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

●Step6

If installation appeared one of the following features,install a vacuum valve in the immediate vicinity of the pump suggested. 1)The discharge line slides down in the direction away from the pump. 2) Siphon phenomenon may occur. 3)Necessary to stop the backwash ofunclean water.

5.1Foundation

We recommend installing the pump ona concrete foundation,which must be sufficient to provide a permanent, consistent support of the pump as a whole.The foundation must be able to absorb vibration,normal stress or impact.The concrete foundation mustbeabsolutely horizontal and the surface flat,with the pump on the foundation.

Theexplanationof thelength,width,heightoffoundation:

Lengthand width of foundation mustbe over 2 0 0 ~ { {mm } } or more than the pump base.

The basic weight must be greater than 1.5 times the total weight of the pump.The minimum height of the foundationcan becalculated based on the concreteweight,density,and foundation length and width.

Installation in noise-freeoperation is particularly important,it is recommended that foundation weight should be 5 times than the pump weight.After the foundation bolts placed,the pump canbe placed ona foundationand,if necessary,leveled witha gasketat this point to hold the waterpump inacompletely horizontal position.

5.2 Damping to Reduce Vibration

If damping is used,the shock absorber must be mounted underneath the foundation.Install the shockabsorberasshownbelow:

5.3Outdoor Installation

For outdoor installation,arain shelter should be used to cover and protect the motor and pump.

5.4Installation Precautions

1)Motorshouldbe installed inaventilated,dry,ice-freeplace.

2) In order to facilitate the pump and motor maintenance,pump should be setaside for more than 5 0 0 \mathsf {mm } above the space.

3) During the Pipeline installation,pipe weight,valve weight,and weight of pipe fitings cannot be withstood on the pump,pipe and pump joints to use seals for sealing.

4) If need to installpressure gauge and flow meter,the pump inletand outlet pressure measurement pointsare generally located in the import flange upstream and downstream of the outlet flange twice the pipe diameter distance,the upstream of the electromagnetic flow meter straight pipe length should be greater than 5 times Pipe diameter distance;the downstreamstraight pipe length should be greater than 3 times the pipe diameter distance; measuring point 4 times the pipe diameter distance,No any elbow existed.

5) When the pump is used for self-priming,a water inlet plug anda bleeder plug in the drain pipe should be used inorder to facilitate the filing of liquid and exhaust gas.At the same time,to install the bottom valve,which at least 0 . 5 \mathsf { m } below than the liquid surface,see 4.2.

5.5OutletPosition Selection

Thepumpcan bebasedonspecial needs to choosea different exit location,if necessary,please specify in the order.See below.

6PrecautionNotices

6.1 Precaution notices:

1)The electrical connection must be operated by authorized electrician in accordance with local regulations.
2) Before removing the terminal cover to prepare for wiring or before disassembling and 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 frequency are marked on the motor's nameplate to ensure compatibilitybetween the motor and the power supplyand to ensure thatthe motor terminal box is properly wired.Thewiring diagram can be found in the terminal box.
5)The pump equipped with frequency converter or electric control cabinet,should follow the instructions manual provided.

6.2 Pump junction box location:

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

7 Pump Start and Stop

7.1 Pump Start

Before starting the pump,confirm againwhether the nut is loose during transportation and installation.Loose nut may cause safety accidents.

Pump starting procedures should follow steps below:

7.2Precaution

1) During the Pump exhaust and water diversion,pay attention to the water spray,do not damage people or other equipment around.

2)After starting the pump,use the discharge side isolation valve to adjust the performance of the pump and do not use the suction side isolation valve.During pump operation,the suction side isolation valve remains fully open, Close the pump isolation valve in discharge side and open the suction side isolationvalve.

7.3 Pump Stop

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.

8 Pump disassembly and assembly

1) If Pump failure,need maintenance,or replacement of the shaft seal and the motor,the pump needs to be disassembled and assembled,following instructions should be followed: 2) See the exploded view of the location and name of the pump parts below.

8.1Precautionsbeforedisassemble

1) Disconnect the motor from the powersupplybefore disassembly,close the isolation valves on both sides of the pump and drain the pump.Electrical specifications must be observed when removing cables.

2) Before disassembly,be sureto prepare the tools for maintenance and new spare parts for replacement.

8.2 Disassemble

1)Remove8 M6 socket head cap screw (No.15);
2) Disassemble inlet&outlet chamber (No.11)、base (No.18)、foot support (No.19);
3)From the inlet&outlet discharge,disassemble the diffuser(No.10),seal ring cover(No.8),seal ring (No.9),seal part(No.14/ No.16), plug(No.13);
4) Consolidate the pump shaft of motor fan cover with tools,disassemble non-metalic inserts hex nuts M8 (No.7) and gasket (No.6);
5) Disassemble impeller (No.5),mechanical seal (No.3),O-ring (No.4),sealing base plate(No.2);

8.3 Assembly

1)Amount the seal ring cover and seal ring onto the diffuser;
2)Amount the diffuser parts in (1) onto the inlet and outlet chamber;
3)Amount the sealing base plate onto the motor;
4) Seal the mechanical seal ring with grease infiltration,even force,pressure to the sealing base plate;
5) Press the mechanical seal active ring and spring to the proper position;
6)Amount impeller, gasket,Consolidate the pump shaft of motor fan cover with tools,use torque
wrench and tighten nutM8;
7)Amount O-ring onto the sealing base plate; Amount the inlet and outlet parts in step(2);
8)Amount the base plate(foot support already），tighten the socket head cap screw symmetrically
(screw contacted with base needs gasket） ;
9) Tighten the plug (O-ring is ready)and sealing part;

9Maintenanceand Repair

1) When maintenance and repair the pump,make sure allpower to the pump be cut offand will not be inadvertently 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.

10 Frost and Frozen Protect

1) If not use a pump during the frost and frozen season,water inside the pump should be empty, to preventdamage.
2) Whenemptying the pump,loosen the pilot plug and open the drain plug on the inlet chamber. 3) When discharging,pay attention to the direction of the water spray,toensure not cause any harm to personnel and equipment.
4) Do not tighten sealing part and drain plug until the pump re-start.

11 Troubleshooting Lists

Before removing the terminal box cover or before disassembling the water pump,make sure that the power supply is cut off and cannot be accidentally switched on.

12Attached drawing,DHM Exploded View

1Motor 8 Seal ring cover 15Sockethead capscrew
2 Sealing base plate 9Seal ring 16 Sealing part
3 Mechanical seal 10 Diffuser 17 Washer
4 O-ring 11 Inlet&outletchamber 18Base
5 Impeller 12 O-ring 19 Foot support
6Gasket 13Plug
7 Non-metallic inserts Hex muts 14 Sealing part

dooch

ShanghaiSino-KoreaDoochPumpManufactureCo.,Ltd.

No.239ZhangLiantang Road,Liantang IndustrialPark,QingpuDistrict,ShanghaiCity,China. Tel:+86.21.67679390 Fax:+86.21.67679396