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Yoshitake MD-71 Operation Manual

Water receiving tank and high placement water tank application
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Water receiving tank and high placement water tank application
Type KS-5 Emergency shut-off valve control panel
Thank you very much for purchasing this product from Yoshitake. To use the purchased product on a
correct and safe basis, read this text before using it. In addition, the user customer is to store this
document carefully.
Responsibility for a failure of the product caused by improper handling will be assumed by the customer.
In this case, the product will be replaced or repaired at the customer's expense.
Warning
Caution
1. Product application ···················································································· 1
2.1 Specifications for the emergency shut-off valve ···································· 1
3. Nominal diameter selection ·········································································· 3
4.1 Emergency shut-off valve ······································································ 4
4.2 Emergency shut-off valve control panel ················································ 5
5.1 Normal condition ····················································································· 5
5.2 In the case of an earthquake ··································································· 6
5.3 Recovery work ························································································ 6
6. Process flowchart ························································································ 6
7.1 Sample piping diagram ··········································································· 7
7.2 Shut-off valve and control panel connection diagram ······················· 8 to 9
7.3 Warnings and cautions in installing the product ··························· 10 to 12
7.4 How to adjust the seismic detector ·············································· 12 to 13
8.1 Warnings in operation ········································································· 14
8.2 Trial running ··············································································· 14 to 17
9.1 Malfunctions and troubleshooting ················································ 18 to 19
9.2 Warnings and cautions in maintenance and inspection ························ 19
9.3 Periodic inspection ····································································· 19 to 21
9.4 Manual operation method ·························································· 21 to 22
About after-sales service
Emergency shut-off system
Type MD-71 Emergency shut-off valve
Operation manual
----- Symbols used in this text refer to the following: -----
Improper handling may cause the user to be killed or seriously injured
Improper handling may cause the user to be slightly injured or the
equipment to be damaged

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  • Page 1: Table Of Contents

    Type KS-5 Emergency shut-off valve control panel Operation manual Thank you very much for purchasing this product from Yoshitake. To use the purchased product on a correct and safe basis, read this text before using it. In addition, the user customer is to store this document carefully.

  • Page 2: Product Application

    Motor protection Current limiter type Measure for dew condensation Space heater built in Manual operation Manual operation mechanism incorporated Protective structure Rain-proof type Electric wire incoming port G1/2 ●Available with the MD-71-N, complying with the Water Works Law in Japan. ■ＥＰＤＴ－２０１ｇ■...

  • Page 3: Specifications For The Emergency Shut-Off Valve Control Panel

    2.2 Specifications for the emergency shut-off valve control panel Model Type KS-5 Emergencyshut-off valve Two units control unit quantity (*1) Inputpower supply AC85～240V 50/60Hz Ambient temperature -10～50℃ Backuppower supply DC24V Backup time Approximately 5 hours Made by Japan Battery Cells (PE 12 V 2.2) Storage battery Charge strategy Constant charge strategy (float charge)

  • Page 4: Nominal Diameter Selection

    3.Nominal diameter selection Select one with a nominal diameter equivalent to or more than the suction (suck) side of the pump. If one with a smaller nominal diameter is used, the specified flow rate cannot be maintained in some cases. (The following figure shows the Cv value and calculating formula). If the nominal diameter of the piping is selected, refer to the standard flow rate specified by the Japanese Industrial Standards (JIS) as an appropriate piping nominal diameter selection method.

  • Page 5: Dimensions, Weight, And Structure

    4.Dimensions, weight, and structure 4.1 Emergency shut-off valve (hereafter called the "shut-off valve") 4.1.1 Nominal diameters of 50 to 150 A Part name Main body Valve body Seat Stem O-ring Bracket Connector Electric actuator Label (mm) JIS 10K(Wafer shape) Nominal Weight diameter (kg)

  • Page 6: Emergency Shut-Off Valve Control Panel

    4.2 Emergency shut-off valve control panel (hereafter called the "control panel") *Those for controlling 1 unit, 3 units, and 4 units differ. Panel mount hole Holder(Side in board) Manual insertion Water drain port (with cap) Weight: 26 kg Part name Function Power supply lamp (white) When the breaker and battery switch is turned on, this comes on.

  • Page 7: In The Case Of An Earthquake

    5.2 In the case of an earthquake If the seismic detector ⑭ mounted inside the control panel detects an earthquake (equivalent to a seismic intensity of 5), the shut-off valve automatically closes the valve. At this time, the seismic detector operation lamp ② on the panel surface and the shut-off valve closing lamp ④...

  • Page 8: Installation Procedure

    7.Installation procedure 7.1 Sample piping diagram Control panel Shut-off valve Water receiving tank high placement water Flexible Support Control panel t IInput power supply ×3cores 2.00mm Power supply Shut-off valve No.2 external alarm intent 25m or less 1.25mm x 5 cores ×2cores 50m or less 2.00mm x 5 cores...

  • Page 9: Shut-Off Valve And Control Panel Connection Diagram

    7.2 Shut-off valve and control panel connection diagra m This section describes where the shut-off valves and each terminal block of the control panel are installed. (1)Control panel terminal block (figure 1) The terminal block is located inside the control panel. (2)Shut-off valve terminal block (figure 2) The terminal block is located inside the electric actuator.
  • Page 10 ※1 Pump protection intent : It is an output terminal for the pump idling prevention with the close valve of the cutoff valve. ( No voltage contact point c：for controlling two units ) Please select NC or NO together and connect COM. NC : The point of contact opens after the close valve of the shut-off valve.

  • Page 11: Warnings And Cautions In Installing The Product

    7.3 Warnings and cautions in installing the product 7.3.1 Warnings and cautions with the control panel and shut-off valves Warnings (1)Since the control panel and the shut-off valves are heavy weights, use a hoisting device or a n e q u i v a l e n t t o d e f i n i t e l y s u p p o r t t h e p r o d u c t w h e n i n s t a l l i n g t h e m . *A drop can possibly cause an injury.
  • Page 12 7.3.2 Cautions with the control panel  Cautions (1)Make sure that the control panel installed is free from vibration. *Vibration or an equivalent can possibly cause a malfunction. (2)When installing the control panel, reserve sufficient space for maintenance, inspection, and repair.
  • Page 13 7.3.3 Cautions with the shut-off valves  Cautions (1)When piping the shut-off valves, ensure to remove the foreign material out of the pipes. *If foreign materials or scales intrude the shut-off valves, the original performance will not be utilized. (2)In installing the shut-off valves, reserve sufficient space for maintenance, inspection, and repair.

  • Page 14: How To Adjust The Seismic Detector

    (13)Regarding the bolt insertion position in installing the shut-off valve to the piping, see the following figure to insert the bolt for easy installation work: Installation posture 取付姿勢 bolts 7.4 How to adjust the seismic detector After installing the control panel, adjust the seismic detector in the following procedure. (See the following figure).

  • Page 15: Operation Procedure

    and lower it downward. (The operation indicator ⑫ of the seismic detector becomes "green.") (9)Install the main body cover ② and tighten the main body cover mount screw ①. *The ⑫ is the operation indicator of the seismic detector. "Green" refers to standby of the seismic detector and "red"...

  • Page 16: Warnings In Operation

    8.1 Warnings in operation  Warnings (1)Before fluid flows, make sure that no risk is anticipated even when fluid flows to the terminals of the piping. *If high temperature fluid blows, a burn can possibly result. *Physical damage can possibly be caused by a fluid outflow. (2)Keep the control panel energized at all times.

  • Page 17: Trial Running

    Judgement Measure and action Item Operation procedure Check contents (OK, NG) in the case of NG Check before Condition check Make sure that no mistake of As shown on the trial running the connection and input connection diagram. power supply specifications is found.
  • Page 18 Judgement Measure and action Item Operation procedure Check contents (OK, NG) in the case of NG Operation a. Turn the shut-off a. Make sure that the shut-off Make a check for valve valve closes the valve. connection and check automatic/close a.
  • Page 19 Judgement Measure and action Item Operation procedure Check contents (OK, NG) in the case of NG Operation a. Turn off the breaker a. Make sure that the "check See the ⑤ to set a power check in a contents" of the above-mentioned power failure above-mentioned No.4 are...

  • Page 20: Maintenance Procedure

    9.Maintenance procedure 9.1 Malfunctions and troubleshooting If the shut-off valves and control panel do not operate as specified, see "each part name of '4.2 Control panel' on page 5" to adopt measures according to the following table: Failure Cause of the failure Troubleshooting and means condition 1.The breaker ⑤...

  • Page 21: Warnings And Cautions In Maintenance And Inspection

    Failure Cause of the failure Troubleshooting and means condition The electric 1.Ambient temperature is out of the 1.Set the ambient temperature within actuator unit of specification range. the specification range. the shut-off valve is abnormally heated. The electric 1.Screws are loosened. 1.Retighten the fasteners.
  • Page 22 For part numbers, see the diagram in "7.4 How to adjust the seismic detector" on page 12  Warning (1)Make sure that the power supply is turned off and then start this procedure. *An electric shock can possibly be given. Check(vcheck) Description Check item...

  • Page 23: Manual Operation Method

    Loosen the level protractor adjustment intent lock nut (5) to the limit of the screw. Keep supporting the adjustment plate (9) with (Also, bring the spring washer (6) and flat washer your hands to tilt it close to you. close to you). Picture 1 Picture 2 9.3.3 Replacing the storage battery (once per three years)
  • Page 24 Remove the main body cover ② of the seismic detector close to you and, as shown in this figure, use a cotton swab (not possibly scratching the steel ball ⑮) or an equivalent to softly press the steel ball ⑮ to release it from the receiving rod ⑮ . (See "7.4 How to adjust the seismic detector"...

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Ks-5

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