Kitz RDH Series User manual

Document No. : KE-4051-00
Operation Manual
For
ELECTRIC COMPACT PROPORTIONATE CONTROL VALVE
(RDH Series)
Thank you for choosing KITZ products.
For safe and trouble-free function and performance of the product,
make sure to read and understand all items in this manual before
handling the product.
Keep this manual accessible to all valve operating personnel.

Document No. : KE-4051-00
This manual applies to the KITZ electric compact proportionate control valve, RDH Series.
CAUTION AND WARNING
For the safe use of the product, read all of the safety precautions listed in this manual before handling the
product.
The safety precautions in this manual are determined to ensure safe and proper use of the product and to
prevent personal injury and property damage. This manual uses two terms, Warning and Caution, according
to the hazard level, to clearly indicate the extent and severity of the risk.
Both Warning and Caution indicate important safety instructions. Please be sure to follow them.
Indicates an imminently hazardous situation that, if not avoided, may
result in serious injury or death.
Indicates a potentially hazardous situation that, if not avoided, may result
in minor to moderate injuries or product damage.
Indicates a prohibited action that must not be carried out.
Indicates a mandatory action that must be followed.
NOTES TO USERS
 This manual is designed to show an appropriate usage of the products for transportation, storage,
installation, operation and maintenance. Be sure to read through this manual before handling the products.
 This manual does not cover the whole scope of conceivable usage of the products for transportation,
storage, installation, operation and maintenance. If technical assistance beyond the scope of this manual is
required, contact KITZ Corporation or its distributor.
 The specifications have been determined with safety considerations. Do not use the products beyond the
specifications.
 The illustrations given in this manual do not show all the details. If more detailed information is required,
refer to the relevant approved drawings.
*Any information provided in this operation manual is subject to change without prior notice.

Document No. : KE-4051-00
Contents
ⅠConstruction and Function1
1. Features2
2. Product Coding2
3. Appearance and Dimensions3
4. Parts Name3
5. Actuator-Valve Assembly4
6. Specifications 5
7. Electric Wiring 6
ⅡTransportation and Storage 7
1. Precautions8
ⅢInstallation,PipingandWiring9
1. Precautions10
2. Piping10
3. Wiring14
ⅣOperation16
1. Function17
1.1 Setting Value17
1.2 Setting Method17
2. Operation22
2.1 Automatic Operation22
2.2 Manual Operation23
2.3 Position Indicator23
2.4 Output of Valve Position24
2.5 Error Detection24
3. Protective Function25
ⅤMaintenance and Inspection27
1. Precautions28
2. Dismantling and Reinstallation28
3. Troubleshooting29
ⅥWarranty30

1 / 31
Document No. : KE-4051-00
I Construction and Function

2 / 31
Document No. : KE-4051-00
1. Features
(1) Designed for 24VDC
(2) Wide applicability to various kinds of fluids
KITZ compact ball valves are made of bronze, copper or stainless steel.
(3) Low pressure loss
KITZ compact ball valves provide a lower pressure loss compared with that of solenoid valves.
(4) Excellent sealing performance
Precision machined ball disc and resin ball seats guarantee high sealing performance and smooth valve
operation.
2. Product Coding
Product
Coding
RDH 1 24 − □□ △△
Valve size (*)
Valve type (*)
Power supply voltage: 24VDC
1: Operation panel
Actuator type (rotary control type)
*Refer to the KITZ catalog for applicable valve types and sizes.

3 / 31
Document No. : KE-4051-00
3. Appearance and Dimensions
4. Parts Name
Fig. 1
Fig. 3
3-M3 screw
Fig. 2
Position indicator
SHUT switch OPEN switch
AUTO/MANUAL switch
ERROR lamp (red)
RUN lamp (green)
AUTO operation indicator lamp
(The u
pp
er
p
ortion flashes.)
Manual operation indicator lamp
(The lower portion flashes.)
Gasket for terminal box
Terminal box cover
Set screw

4 / 31
Document No. : KE-4051-00
5. Actuator-Valve Assembly
 DO NOT install the product in any explosive or corrosive environment. This product is not an
explosion-proof type.
 DO NOT perform wiring nor remove the actuator cover while the power is on. There is a risk of
electric shock.
 DO NOT disassemble the actuator from the valve while the power is on. It may damage the
product.
 DO NOT put your finger or any object into the valve port for valve position check. It may cause
personal injury.
 Reduce the pipe internal pressure to atmospheric and release the fluid from the pipe to prevent an
explosion due to residual pressure or fluid.
 DO NOT disassemble the actuator from the valve. It may cause a malfunction or leakage.
 This operation manual mainly covers how to handle the valve actuator. Refer to the KITZ catalog for
details of the electric proportionate control valves.
 Follow the instructions in this operation manual for piping and wiring of this product. Otherwise, it
may cause an accident or failure.
 Use of a metallic ball valve on plastic piping may cause a failure due to excessive load during manual
operation.
Spring washer
Hexagon bol
t
Valve
Insulator
Indicator plate
Connector
* A typical structure is shown as a
reference. Refer to the approved
drawing for details.
Actuator
Fig. 4

5 / 31
Document No. : KE-4051-00
6. Specifications
The actuator receives a control signal and controls the valve operation in real time. Power supply is cut off
when the valve has reached its designated position.
When the valve open position is shifted due to an external force, the valve open position is corrected by the
actuator.
Type of Actuator RDH 124-2
Power supply 24VDC−
＋１０ ２０ ％
Rated current During operation: 1A When stopping: 0.1A
Rated torque 8N・m
Closing/Opening time *2
*3 Selectable between 3 to 20 seconds (per 1 second) (Default: 3 seconds) Inching motion for 4 seconds or above
Resolution *2 Selectable between 10 to 200（per every 10 seconds） (Default: 200)
Insulation class JIS Class E （120℃）
Protection rate IP55
Insulation resistance 500VDC 10MΩ or above
Insulation strength 1 minutes for 250VAC or 1 second for 300VAC Leakage current: 1mA or below
Control input signal *1 4 to 20mADC
1 to 5VDC
2 to 10VDC
（Impedance 250Ω）
（Impedance 10kΩ）
（Impedance 10kΩ）
Wiring Terminal connection 8 pins
Service environment −10 to＋50℃ RH30 to 85%
(Indoor use only with no direct sunlight)
Positon indicator
output signal *1 4 to 20mADC
1 to 5VDC (Load resistance Max. 500Ω)
(Load resistance Min. 100kΩ)
Error output Open corrector output 30VDC 100mA or below
Manual operation *4 Operation panel
Position indicator LED (4 digits)
Reset operation Switches on operation panel (OPEN, SHUT or AUTO/MANUAL）
or power off
Acton *2 Selectable between direct action and reverse action (Default: Reverse action)
Operation ａt signal interruption *2 Selectable from Fully closed/Fully open/Stop (Default: Fully closed)
Operation after power recovery Control starts from where the power was cut off.
*1 Refer to the nameplate on the valve body for the designated signal at the time of purchase.
*2 Option setting is available through the panel operation. See 1.2 Setting Method in Ⅳ Operation .
*3 See  2.1Automatic Operation in ⅳ Operation for inching motion.
*4 See 2.2 Manual Operation in ⅣOperation..

6 / 31
Document No. : KE-4051-00
7. Electric Wiring
Fig. 5
1) Make sure to connect FG to earth ground.
2) Terminal 1, 2 and Terminal 3 through 8 are internally insulated.
3) Terminal 4 [control input signal (−)] ,Terminal 6 [open position output signal (−)] and Terminal 8 [alarm
output (−)] have the same electric potential.
4) Control input signal and open position output are the signals selected at the time of purchase.
(Standard setting: 4-20mA)
Fig. 6 Example of Connection of Plural Actuators
 When more than one RDH actuators are controlled by the same power supply and the same
signal source, it may cause a malfunction.
 When more than one RDH actuators are operated with one controller, the input signals of the
actuators shall be 1-5V or 2-10V and connected in parallel.
Control input signal
4-20mADC / 1-5VDC / 2-10VDC
Scope of suppl
y
−
24VDC
＋
−
Error outpu
t
Open corrector output
30VDC/100mA or below
Valve position output
4-20mADC/ DC 1-5VDC
＋
−
＋
−
＋
1
2
3
4
5
6
7
8
FG
Power supply
24VDC
Open position
output 1
Control input signal
1-5V/2-10V
RDH
Control input signal
1-5V/2-10V
Open position
output 2
RDH
Control input signal
1-5V/2-10V

7 / 31
Document No. : KE-4051-00
Ⅱ Transportation and Storage

8 / 31
Document No. : KE-4051-00
1. Precautions
 DO NOT make any excessive impact on the product by throwing,
dropping or dragging.. (Fig. 7)
 DO NOT apply excessive load to the product. Overloading may cause
a malfunction.
 DO NOT store the product in a place subject to rainwater or high
humidity. It may result in corrosion of the product.
 DO NOT store the product out of the package. Keep the product in the package to prevent
foreign particles from entering the inside of the product. Take the product out of the package
just before the installation.
 DO NOT disassemble the product. Otherwise, it may cause a malfunction and damage.
 Keep the valve in the fully open position during storage. Storing the valve in the partially open
position for a long time may deform the ball seats and cause internal leakage. Foreign objects
will stick to the ball surface if the valve is stored in the fully closed position, resulting in
damage of the ball or the ball seats.
 Store the product in a place without high humidity and corrosive gas.
 Store the product indoors, avoiding direct sunlight and dust.
Fig.7

9 / 31
Document No. : KE-4051-00
Ⅲ Installation, Piping and Wiring

10 / 31
Document No. : KE-4051-00
1. Precautions

DO NOT use the product in an environment where there is flammable gas or corrosive gas. This
product is not an explosion-proof type. There is a risk of explosion.
 DO NOT install the product in a place where there is a danger of submergence.
 DO NOT install the product in a place subject to external forces such as vibration which may affect
the function of the product. Take appropriate measures, such as use of a vibration absorber, if
installation in such a place cannot be avoided.
 DO NOT install the product in a corrosive environment with high humidity and temperature.
 DO NOT install the product outdoors. Direct sunlight shall be avoided by using a sunshade, etc. even
if it is installed indoors.
 Ensure a sufficient space necessary for installation, maintenance and operation.
 Take protective measures, such as use of a heat shield plate, against radiant heat from the
peripheral equipment.
 Take appropriate measures, such as putting a protective fence, if the product is installed near a
passageway.
2. Piping
 Check the flow direction of unidirectional valves, such as V-cut valves and three-way valves before
installation.
 As shown in Fig. 8-1, apply a wrench to the valve end on the piping side when mounting the valve. If
the valve is screwed into the pipe by applying a wrench on the opposite end, rotating force may
deform the valve body and damage the valve (Fig. 8-2).
 Use support stands as appropriate to avoid excessive load to the pipe. (Securely support the both
ends of the valve when a metallic ball valve is installed on plastic piping systems.)
 Provide a filtering device such as a strainer on the upstream side of the valve if foreign objects such
as sands and metallic particles are contained in the fluid.
 This product is delivered with the valve in the fully open position. Upon start of the operation, the
valve automatically opens to the predetermined position.
Fig.8−2
Fig. 8-1
Yes No

11 / 31
Document No. : KE-4051-00
 DO NOT apply too much sealing material for piping. Excessive sealing materials may get into the
valve interior and cause an operational failure such as seat leakage. (Leave one or two threads
of the pipe end free from sealing material when a sealing material is applied.）
 DO NOT excessively tighten the valve using a wrench (Fig.9-1) or DO NOT forcibly adjust the
actuator position by hand (Fig. 9-2).
 DO NOT excessively thread a valve into a pipe (Fig. 10). It will damage or distort the valve
interior, leading to external leakage or operational failure.
 DO NOT apply an external force to the counterclockwise direction .when piping the product. It
may cause external leakage from the threaded portion.
 DO NOT hold the valve with a vice. It may deform or damage the valve, leading to external
leakage or operational failure (Fig. 11).
Fig.11
禁止 禁止
Fig.9−①
禁止
The pipe end must no
t
come into the valve interior.
Friction sound
禁止
Fig.9−②
Fig. 10
No No
No
No

12 / 31
Document No. : KE-4051-00
 DO NOT mount the product with the actuator on the lower side. Intrusion of water into the
actuator shall be prevented. When the product is installed, the actuator shall be oriented within
90 degrees from the upright position. The connection port of the terminal box must not face
upward.
Fig. 12
 DO NOT apply excessive load to the product or step on the product. It may cause leakage or an
operational failure (Fig. 13).
Fig. 13
 DO NOT open or close the valve while being flushed after installation. Foreign objects flowing
through the pipe may damage the valve seat.
 Do not apply any excessive bending moment to the product. It may deform the valve body and
cause a functional failure.
禁止
No
Yes

13 / 31
Document No. : KE-4051-00
1. Before installation, check that the design specifications of the product satisfy all the service conditions.
2. Remove dusts, scales and other foreign objects from the valve end threads and the inside of the pipe.
3. Check the thread type and the standard of valve threads with a gauge. Make sure that the required number
of the effective threads is provided.
4. To screw the valve into the pipe, apply a wrench to the hexagon portion of the valve end which is joined with
a pipe.
5. For installation of bronze or brass valves, use the appropriate tightening torque shown in the table below.
Tightening Torque
Valve Size 1/2 3/4 1 11/4 11/2 2
Tightening Torque
N-m 20 to 29 39 to 49 49 to 59 59 to 69 69 to 78 78 to 88
6. To threaded ends, apply a sealing material suitable to the service fluid and temperature.
7. After completing the installation of the product, perform flushing with the valve in the fully open position to
remove foreign objects from the pipeline.
8. Use of a flexible tube to the C side is recommended for installation of 3-way ball valves.
Fig. 14
B
C
A
Flexible tube
for 3-way valve

14 / 31
Document No. : KE-4051-00
3. Wiring
In order to prevent electric shock:
 Turn off the power supply before performing electric wiring.
 After completing wiring, close the terminal box cover by tightening the screws.
 Perform electric wiring in a place not subject to splashing of rainwater.
 DO NOT forcibly pull the connecting cables and wires as they may get disconnected and cause
electric shock. Allow some slack in the cable when connecting the actuator to the power source
(Fig. 15).
Fig 15
 DO NOT perform wiring in a place with high humidity.
 DO NOT modify the product. It may result in a functional failure.
 DO NOT separate the actuator from the valve. It may damage the actuator.
 DO NOT lose the seal gasket (made of chloroprene rubber) installed in the terminal box cover for
dust prevention.
 DO NOT scratch the contact surface of the seal gasket. It will impair the sealing performance.
 DO NOT lose the set screws used for the terminal box cover.
 Wiring work must be performed by a licensed electrician or a skilled engineer.
 This product is designed for 24VDC. Check that the power supply is suitable for use with this
product.
 Perform wiring work properly to prevent accidents caused by short-circuit, etc.
 Follow the instructions on the nameplate when performing a wiring work. Incorrect wiring may
damage the electrical components.
 Make sure to thoroughly seal the cable connector, cable gland, terminal box conduit port to prevent
water intrusion to the actuator and the terminal box. Insufficient sealing may result in corrosion and
malfunction, etc.
 Perform wiring away from load inductor and high voltage devices.
 Insulate the core wire by cutting the edge of the core wire to prevent electric shock, short circuit,
etc.
 Keep other power supply cables and power cables away from the cables of this product to prevent a
malfunction caused by noise.
 Take appropriate measures for noise and adjust the instruction output period of the controller.
Otherwise, it may lead to short life of the product.
NoNo
Yes
Slack the cable
.
Slack the cable.
Yes

15 / 31
Document No. : KE-4051-00
 Control the surge generation by using surge killer, spark killer, etc.
 Connect the shielding wire to earth ground on the controller side when shielding wire is used.
 Make sure to connect FG to earth ground.
(1) Actuator Cables
Number of
Wire Cores Applicable Electric Wire Solid Wire Flexible Stranded Wire Ｅｘｐｏｓｅｄ Length
8 AWG28 to AWG20 0.08 to 0.5mm20.25mm25 to 6mm
(2) Wiring Method of Terminal Block
① Prepare the cables shown in (1) and remove the coating of the tip of the cable.
② Refer to Fig. 16 and move the clamp on the terminal block to the direction where the wire insertion port
opens.
③ Insert the cable into the cable insertion port until it reaches the end.
④ While keeping the cable as in ③, move the clamp on the terminal block to the direction where the cable
insertion port closes.
⑤ Repeat ① through ④ for the applicable terminal block No.
*To open and close the insertion port easily, insert the tip of a flat-head screwdriver (2-3mm) in the dent
on the clamp center and slide the clamp.
(3) Specifications of Cable Lead-In Port
Cable connector shall be applicable to the cable with outer diameter ofφ10.5 toφ14.5.
Screw for thick steel conduit pipe shall be G16. (PF1/2B for screw for the cable lead-in port of the terminal
box.）
(4) Burnout of the circuit can be prevented by the protection circuit when the power supply is reversely
connected and energized.
Fig. 16
Cable lead-in port
Detail of Terminal Block
Terminal block number
(Printed on the substrate)
Clamp position where the
wire insertion port opens.
Cable insertion port
Clamp position where the wire
insertion port closes.
12345678
External View
Internal View
Terminal block

16 / 31
Document No. : KE-4051-00
Ⅳ Operation

17 / 31
Document No. : KE-4051-00
1. Function
1.1 Setting Value
Setup values of resolution, open/close operating time, operation upon signal interruption, direct and reverse actions are
selectable.
(1) Setting of resolution: 10 to 200 (incremented by 10） 【Initial value: 200】
Stopping positions during automatic operation are selectable in the range of 0 to 90 degrees.
LED indication: 【a. 10】 to 【a. 200】
(2) Setting of open/close operation time: 3 seconds to 20 seconds （incremented by 1 second） 【Initial value: 3 seconds】
Operation time from fully closed position to fully open position is selectable during automatic operation.
Continuous operation is performed when it is set to 3 seconds and inching operation is performed when it is set to 4
seconds or longer.
LED indication: 【b. 3】 to 【b. 20】
(3) Operation setting for signal interruption: Fully open/Fully closed/ Stop 【Initial setting: Fully closed】
Actuator operation is selectable for the control input signal below 3.9mA during automatic operation.
LED indication: 【c. oPn】for Fully open, 【c. CLS】for Fully closed, 【c. StP】forStop
(4) Setting of direct action and reverse action: Direct /Reverse action 【Initial Value: Reverse action】
Opening or closing direction during automatic operation is selectable.
Output signal is not affected by the setting of direct action or reverse action. (See the table below.)
LED indication: 【d. PoS】for Direct action, 【d.rEv】for Reverse action
Input of 4mA（１Ｖ/２Ｖ） Input of 20mA（5V/10V）
Operation Operation Angle Output Signal Operation Angle Output Signal
Direct
action 90°
（valve position indicator 100 %） 20mA（5V/10V） 0°
（valve position indicator 0 %） 4mA (1V/2V)
Valve
Position Reverse
action 0°
（valve position indicator 0 %） 4mA（1V/2V） 90°
（valve positon indicator 100 %） 20mA (5V/10V)
1.2 Setting Method
(1) While the operation is in the stop state, hold down the OPEN switch and the SHUT switch simultaneously on
the current valve position display screen.
(2) After holding down the OPEN and SHUT switches for at least 3 seconds, 【Setting Selection Mode】 appears
and resolution value is indicated.
Current setting value is indicated.
Setting Items
【a】: Resolution
【b】: Open/Close operation time
【c】: Operation upon signal interruption
【d】: Direct/Reverse action
This display shows 56.5% of valve opening position and the valve is .in
the stop state. While the valve is opening or closing, this setting is no
t
available