Miura MW-150C Use and care manual

RESIN REPLACEMENT PROCEDURE
System Integrated Water Softener
MW-150C MW-65H MW-35U
MW-250C MW-100H MW-65U
MW-400C MW-150H MW-100U
MW-600C (Korea Product) MW-150U
MW-1000C MW-250U
(China Product) MW-400U
MW-600U
MW-1000U
(NorthAmerica
Product)
MIURA CO., LTD.
This document was formulated in Japan. Comply with the
regulations and standards of the country of use regarding installation
and usage.
The specifications of products and components may vary with
country of use and the site situation.
INFORMATION IN THIS MANUAL MAY BE CHANGED WITHOUT
NOTICE.
Manual Code No. S827-088-4010

MIURA_CONFIDENTIAL
Document No.: S827-088-4010
○This material explains the exchange procedure of ion exchange resin of system water softener
MW type (hereinafter referred to as this machine). When doing the resin replacement work of this
machine, please carry out the work correctly based on this material.
- Table of Contents -
1. Required parts .........................................................................................................1
2. Tools and protective equipment ............................................................................2
3. Operational procedure............................................................................................3
3-1 Resin replacement for small MW................................................................................................. 4
3-1-1 Removal of control valve ...................................................................................................... 4
3-1-2 Drawing out resin and gravel ................................................................................................ 6
3-1-3 Check Collecting pipe,Resin tank,O-ring. ............................................................................. 8
3-1-4 Filling with resin and gravel .................................................................................................. 8
3-1-5 Reassembly of equipment .................................................................................................... 9
3-1-6 Procedures after replacement ............................................................................................ 10
3-1-7 Resin replacement on the other unit and procedures after replacement ............................ 11
3-2 Resin replacement for middle MW ............................................................................................ 12
3-2-1 Removal of control valve .................................................................................................... 12
3-2-2 Drawing out resin and gravel .............................................................................................. 14
3-2-3 Checking the collecting pipe, resin tank, and O-rings......................................................... 15
3-2-4 Feed in gravel and resin. .................................................................................................... 16
3-2-5 Reassembly of equipment .................................................................................................. 17
3-2-6 Procedures after replacement ............................................................................................ 18
3-2-7 Resin replacement on the other unit and procedures after replacement ............................ 19
3-3 Resin replacement for large MW ............................................................................................... 20
3-3-1 Stopping the water flow in the equipment........................................................................... 20
3-3-2 Opening of the resin tank.................................................................................................... 21
3-3-3 Checking resin tank and O-rings ........................................................................................ 22
3-3-4 Drawing out resin and gravel .............................................................................................. 23
3-3-5 Filling with gravel and resin ................................................................................................ 23
3-3-6 Reassembly of equipment .................................................................................................. 24
3-3-7 Procedures after replacement ............................................................................................ 25
3-3-8 Resin replacement on the other unit and procedures after replacement ............................ 26

MIURA_CONFIDENTIAL
Document No.: S827-088-4010
1
1. Required parts
●Resin, Gravel
Note：When replacing the resin for both unit 1 and unit 2, the amount required is double the amount
shown in the table below.
Table1. Amount of resin and gravel required for per unit(per resin tank)【CHINA】
Table2. Amount of resin and gravel required for per unit(per resin tank)【AMERICA】
MW-35U MW-65U MW-100U MW-150U MW-250U MW-400U MW-600U MW-1000U
5L 9L 12L 2 4 6.5 4 6.5
Resin
amount
（bag）
Brand：Pure Resin PC004
Brand：DOW（R&H) C101Na
1bag=25L=0.883CFT
1.4 2.6 4 6 101624 40
Model
Gravel amount（bag※）
1 bag＝50 lbs
Note1：The Unit of amount of gravel for MW-35,65,100U is litre.
Table3. Amount of resin and gravel required for per unit(per resin tank)【KOREA】
Model MW-65H MW-100H MW-150H
Gravel amout(L) 9 12 30
Resin amount(L) 65 100 150
●Collecting pipe assembly and tank adapter assembly.
Note: Only for MW-65H to 150H, 150C to 400C, and 35U to 400U.
After long use, the collecting section (bottom section) of the collecting pipe
assembly and tank adapter assembly may be clogged at the net or slit or
broken by the resin being forced into the gravel layer during the last resin
replacement. Therefore, replace the collecting section together with the resin
due to a potential breakage or blockage of the net.
Note: When such breakage occurs, the resin may spill to the secondary side.
Note: Refer to the parts catalog for the parts code.
Figure 1. Collecting pipe ASSY
Collecting pipe ASSY
Model MW-150C MW-250C MW-400C MW-600C MW-1000C
Gravel amount(bag)
1bag=25kg
2
(50kg)
3.5
(87.5kg)
6
(150kg)
3.5
(87.5kg)
6
(150kg)
Resin amount（bag）
1bag=20kg
7
(140kg)
11
(220kg)
18
(360kg)
26
(520kg)
44
(880kg)

MIURA_CONFIDENTIAL
Document No.: S827-088-4010
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●Seal parts(If necessary)
Replace the seal parts such as O-rings together, if damage or deterioration is found.
The seal parts that could require replacement in this work are shown below.
Table 4. Seal parts with possibility of replacement
Model Seal parts with possibility of replacement Reference
page
MW-35U,65U
【Connection part of resin tank and control valve】
・O-ring Old JIS W1516 AN6227(Material：NBR)
【Tip of connection pipe ASSY(Refer to P9 figure)】
・O-ring P21(Material：NBR)
【Connection part of bypass valve and control valve】
・O-ring D=23.5mm W=2.5mm(Material：NBR)
P4,8
MW-65H～150H
MW-150C～400C
MW-100U～400U
【Connection part of resin tank and tank adaptor】
・O-ring P105(Material：NBR)
【Connection part of tank adaptor and control valve】
・O-ring AS568-349(Material：NBR)
・O-ring P65(Material：NBR)
・Backup ring for P65
P15
MW-600C/U,
1000C/U
【Connection part of resin tank】
・O-ring P185(Material：NBR) P19
Note: Refer to the parts catalog for the parts code.
2. Tools and protective equipment
●Tools, parts
・PVC pipe 2m-2.5m about φ32 (For leveling the gravel layer after filling the gravel)
・Tank adaptor spanner (For MW-65H-150H,150C-400C,100U-400U)
CHINA, AMERICA･･･ Use the tool provided with the product. Alternatively, prepare your own tool.
KOREA･･･Japan parts code：S827-008-6101-6
• Funnel for filling the resin
For MW-35U,65U
Japan parts code：S827-001-7700-4
For MW-65H-150H, 150C-400C, 00U-400U
Japan parts code：S827-001-7800-4
・MW resin replacement kit S427-920-0010-7 (For MW-65H-150H,150C-400C,100U-400U)
*The following parts are required separately. (refer to P7)
JIS standard PVC pipe:Pipe TS VP25X2000L PVC(J140-125-2000-0)
φ16-φ12 conversion tube fitting: Different diameter tube fitting(SA27-000-0490-0)
・Resin receiving container (Tank etc.), Soil bag ,Water receiving container (Poly beaker etc.)
・Hose(If drain the resin by siphon),Commercial vacuum cleaner (Both dry and humid),Bus pump etc.
・Measuring cup (2L) ・Silicone oil ( or grease)
・Standard tool set
●Wearing of protective equipment
Depending on the work, wear a safety hat, safety glasses, safety mask, safety shoes, leather gloves,
etc.
When performing work in a high place, wear a safety belt to prevent a fall.
If necessary, arrange the funnel for filling the resin.
Resin replacement is possible without the resin
replacement kit. Work efficiency can be improved by using
resin replacement kit. Please arrange as necessary.

MIURA_CONFIDENTIAL
Document No.: S827-088-4010
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3. Operational procedure
Note: Although you can pass water in the other unit during the replacement work, pay attention to the
residual capacity of the unit passing water.
• If only one of the units has a reduced residual capacity, first replace the resin of the unit with
the reduced residual capacity.
• If both units have a reduced residual capacity, replace the resin after recovering the residual
capacity by a manual regeneration.
The details of the work depend on the equipment capacity.
Classification CHINA・AMERICA
(High hardness area) KOREA Work reference page
Small Model MW-35U
MW-65U
P4
3-1 Replace the resin of the
small MW
Middle
Model
MW-100U
MW-150C/U
MW-250C/U
MW-400C/U
MW-65H
MW-100H
MW-150H
P12
3-2 Replace the resin of the
middle MW
Large Model MW-600C/U
MW-1000C/U
P20
3-3 Replace the resin of the
large MW
Replace the resin when no abnormality is occurring in the equipment and the
equipment state is in service process or service standby process.
Do not climb or place your foot on the resin tank. Doing so may cause a serious injury
due to a fall/tumble.
Prepare a working floor using a scaffold, etc. and wear a safety belt and other protective
gear to prevent a fall.