ACTIVAL Motorized Two-Way Valve with Flanged-End Connection (Spring Return Type Actuator) (JIS 10K-FC200, -SCS13A)
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1 Specifications/Instructions ACTIVAL Motorized Two-Way Valve with Flanged-End Connection (Spring Return Type Actuator) (JIS 10K-FC200, -SCS13A) General ACTIVAL Models VY51XXK and VY51XXH are series of motorized two-way valves with flanged-end connection. Valve and actuator are integrated in a single unit. Valve size ranges from DN15 (1/2 ) to DN80 (3 ) and valve body rating corresponds to JIS 10K. Actuator has a reversible synchronous motor, which operates at a low voltage of 24 V AC. Since the actuator fully closes the valve in case of power failure, it is suitable for failsafe application. 4 kinds of control signals are available to operate ACTIVAL. 1. Nominal 135 Ω feedback potentiometer (built-in): Provides proportional control in combination with a DDC controller (e.g., Infilex GC Model WY5111). 2. Nominal 135 Ω resistance input: Provides proportional control in combination with a proportional controlled electric controller (e.g, Neostat Model TY900XZ, Model TY991) ma DC input: Provides proportional control in combination with a DDC controller (e.g., Infilex GC Model WY5111, Model R35/ R36) V DC input: Provides proportional control in combination with a DDC controller (e.g., Infilex AC Model WY5117). Notes DDC: Direct Digital Control JIS: Japanese Industrial Standards Features Compact and lightweight: Rotary motor actualizes small body and light weight. Valve and actuator integrated in a single unit: Pre-assembled body requires no adjustment. A variety of control signals available: - Nominal 135 Ω feedback potentiometer - Nominal 135 Ω resistance input ma DC input V DC input Valve applicable to high differential pressure, with large Cv value, high rangeability, and low leakage. Durable actuator with low power consumption. Equal percentage flow characteristics V DC output (for position feedback) available with 4-20 ma DC input and 2-10 V DC input types. Spring return actuator: Actuator automatically closes the valve in 0 % position in case that the power is down. IMPORTANT: To control ACTIVAL with a third-party controller, please consult with Azbil Corporation s sales personnel. 1
2 Safety Instructions Please read instructions carefully and use the product as specified in this manual. Be sure to keep this manual near by for ready reference. Usage Restrictions This product is targeted for general air conditioning. Do not use this product in a situation where human life may be affected. If this product is used in a clean room or a place where reliability or control accuracy is particularly required, please contact Azbil Corporation s sales representative. Azbil Corporation will not bear any responsibility for the results produced by the operators. WARNING This product weighs 18 kg or over (depending on the models). To prevent hazardous accident and severe injury, move or carry the product with enough manpower or a vehicle. Do not disassemble the spring unit of the actuator. The spring may rotate too fast or jump out of the actuator due to disassembly, resulting in severe injury. Avoid touching the moving parts of ACTIVAL in operation. Careless touch may cause severe injury. CAUTION Installation and wiring must be performed by qualified personnel in accordance with all applicable safety standards. Disconnect power from ACTIVAL before performing any wiring or maintenance to prevent equipment damage. All wiring must comply with local codes of indoor wiring and electric installation rules. Use crimp terminal lugs with insulation for electric wires to be connected to the screw terminals. Make sure all the wires are tightly connected to the screw terminals. Loose connection may cause fire or heat generation. Install the ACTIVAL in the position as specified in this manual. Excessively tight connection of the valve to a pipe and improper installation position may cause valve damage. Do not install the ACTIVAL in a location close to a steam coil or a hot-water coil. High temperature radiation may result in an actuator malfunction. After installation, make sure no fluid leaks from the connecting parts of valve and pipes. Incorrect piping may cause fluid leakage. Use full gasket for the valve with flat face flange. Otherwise, the valve may get damaged or fluid leakage may occur. This product is not overcurrent-protected inside. Provide an overcurrent protective device such as fuse, breaker, etc. in a building (or in a control panel cabinet) where the product is installed. Do not allow any foreign substance inside the piping. Flush the piping so that no foreign substance remains. This product must be operated within its rated operating ranges specified in this manual. Failure to comply will cause equipment damage. This product must be operated under the operating conditions (power, temperature, humidity, vibration, shock, installation position, atmospheric condition, etc) specified in this manual to prevent equipment damage. Operate the ACTIVAL within the service life (spring unit: 30,000 returns), and avoid application that keeps the operating cycle excessively frequent so as not to shorten its service life. Do not leave the controlled fluid frozen to prevent equipment damage or fluid leakage. Do not put heavy load on the actuator. Do not disassemble the product. Disassembly may result in equipment damage. Do not detach the actuator from the valve in open position. Avoid touching the installed ACTIVAL (valve body, yoke, joint). When being used to control hot water or steam, it may reach high temperature and may cause burn injury. Dispose of this product as an industrial waste in accordance with your local regulations. Do not reuse all or part of this product. 2
3 Model Numbers Model VY51XXK00XX/VY51XXH00XX is the model for the valve and actuator integrated into a single unit. The model number label is attached to the yoke. The control signal is indicated on the actuator label and on the wiring diagram label, as shown below. Nominal 135 Ω feedback potentiometer: F.B. Pot Nominal 135 Ω resistance input: 135 Ω 4-20 ma DC input: 4-20 ma 2-10 V DC input: 2-10 V Base model number VY51 Actuator/valve Actuator Valve Control Rating/ Nominal Description Type signal material size/cv Motorized two-way valve with flanged-end connection 1 Nominal 135 Ω feedback potentiometer 2 Nominal 135 Ω resistance input 3 4 ma DC to 20 ma DC input with 2 V DC to 10 V DC position feedback output 4 2 V DC to 10 V DC input with 2 V DC to 10 V DC position feedback output 5 JIS 10K / JIS FC200 6 JIS 10K / JIS SCS13A IEC IP54 protected and standard torque type spring return actuator K with terminal block (Valve sizes: DN15 to DN80) IEC IP54 protected and standard torque type spring return actuator H with terminal block for high differential pressure application (Valve sizes: DN65 to DN80) DN15 (1/2 ) / 1.0 in Cv value 12 DN15 (1/2 ) / 2.5 in Cv value 13 DN15 (1/2 ) / 6.0 in Cv value 14 DN15 (1/2 ) / 1.6 in Cv value 15 DN15 (1/2 ) / 4.0 in Cv value 21 DN25 (1 ) / 10 in Cv value 22 DN25 (1 ) / 16 in Cv value 41 DN40 (1 1 / 2 ) / 25 in Cv value 42 DN40 (1 1 / 2 ) / 40 in Cv value 51 DN50 (2 ) / 65 in Cv value 61 DN65 (2 1 / 2 ) / 95 in Cv value 81 DN80 (3 ) / 125 in Cv value Note: For DN65 and DN80 valves to control chilled/hot water or high-temperature water, Models VY51XXH0061 and VY51XXH0081 (for high differential pressure application) are applicable. (Models VY51XXK0061 and VY51XXK0081 are not applicable.) 3
4 Specifications For weight, refer to the table shown in the section Dimensions. Valve specifications Item Model Body pressure rating Size, Cv, Close-off ratings Note: Close-off ratings of the actuator in combination are shown on the right. Practical close-off rating required for the valve controlling 175 C steam is 0.8 MPa. Specification Two-way valve with flanged-end connection JIS 10K (Max. pressure: 1.0 MPa) Model number Nominal size Cv Close-off ratings Chilled/hot water, Steam Hot water VY51XXK0011 DN15 (1/2 ) MPa 1.0 MPa VY51XXK0012 DN15 (1/2 ) MPa 1.0 MPa VY51XXK0013 DN15 (1/2 ) MPa 1.0 MPa VY51XXK0014 DN15 (1/2 ) MPa 1.0 MPa VY51XXK0015 DN15 (1/2 ) MPa 1.0 MPa VY51XXK0021 DN25 (1 ) MPa 1.0 MPa VY51XXK0022 DN25 (1 ) MPa 1.0 MPa VY51XXK0041 DN40 (1 1 / 2 ) MPa 1.0 MPa VY51XXK0042 DN40 (1 1 / 2 ) MPa 1.0 MPa VY51XXK0051 DN50 (2 ) MPa 1.0 MPa VY51XXK0061 DN65 (2 1 / 2 ) MPa VY51XXK0081 DN80 (3 ) MPa VY51XXH0061 DN65 (2 1 / 2 ) MPa 0.7 MPa VY51XXH0081 DN80 (3 ) MPa 0.4 MPa Materials Body Gray cast iron (JIS FC200) for flat face (FF) type Stainless steel (JIS SCS13A) for raised face (RF) type Plug and stem Stainless steel (equivalent to JIS SCS) Seat ring Heat-resistant PTFE Gland packing Inorganic fiber Gasket Non-asbestos joint sheet End connection Flanged-end connection Models VY51X5K, VY51X5H (JIS FC200): Flat face (FF) Models VY51X6K, VY51X6H (JIS SCS13A): Raised face (RF) Allowable fluid temperature 0 C to 175 C Flow characteristics Equal percentage Rangeability 100 : 1 Seat leakage 0.01 % or less of rated Cv value ( Cv or less for DN15 model) Paint Model VY51X5 (gray cast iron (JIS FC200)): Gray (Munsell 5B 4/1) Model VY51X6 (stainless steel (JIS SCS13A)): Unpainted Applicable fluid Chilled/hot water, hot water, steam Installation orientation Installable in any position ranging from upright to sideways (90 tilted) *Always install in upright position outdoors. Actuator to be combined Integrated with the valve Actuator specifications Actuator type Power supply Applicable valve size Power consumption Timing Control signals Item Feedback signal (only with 4-20 ma DC input type and 2-10 V DC input type) Specification Spring return actuator for standard and high differential pressure application 24 V AC ± 15 %, 50 Hz/60 Hz DN15 to DN80 of standard torque type DN65, DN80 of high torque type Nominal 135 Ω feedback potentiometer type (Model VY511XX): 13 VA Nominal 135 Ω resistance input type (Model VY512XX), 4-20 ma DC input type (Model VY513XX), 2-10 V DC input type (Model VY514XX): 15 VA 63 ± 5 sec (50 Hz) / 53 ± 5 sec (60 Hz) Return time: 3 to 40 seconds (Fully open fully close operation) - Nominal 135 Ω feedback potentiometer (Total resistance: Nominal 135 Ω, Max. applied voltage: 5 V DC) - Nominal 135 Ω resistance input - 4 ma DC to 20 ma DC input (Input impedance: 100 Ω) - 2 V DC to 10 V DC (Input impedance: 150 kω or higher) Range: 2 V DC (0 % position) to 10 V DC (100 % position) Max. load resistance: 10 kω or higher (Max. output current: 1mA) (1/2) 4
5 (2/2) Item Environmental conditions Specification Rated operating conditions Transport storage conditions* 2 Ambient -20 C to 50 C temperature* 1 (Fluid temperature 0 C to 175 C) -20 C to 70 C Ambient humidity 5 %RH to 95 %RH Vibration 4.9 m/s 2 (10 Hz to 150 Hz) 19.6 m/s 2 (10 Hz to 150 Hz) Notes: 1 Do not allow the fluid to freeze. 2 The actuator shall be packed during transport Ambient temperature ( C) Fluid temperature ( C) Materials Surface finishing Installation locations Valve position indication Manual operation Wires connection Enclosure rating Insulation resistance Dielectric strength Installation orientation Position for shipment Service life of spring unit Case Aluminum alloy casting Top cover, terminal cover Polycarbonate resin (Color: gray) Yoke Steel plate Case of the spring unit Aluminum alloy casting Cover of the spring unit Aluminum alloy casting Spring Stainless steel Case None Yoke Electro-galvanized (Bright chromate finish) Indoor / outdoor (keep away from direct sunlight.) Pointer located at the bottom of the actuator shows the position by pointing at the value of the scale (0: close to 100: open) on front, rear, and bottom sides. Not available. M3.5 screw terminal connection IEC IP54 (dust-proof and splash-proof) Between terminal and case: 5 MΩ or higher at 500 V DC Between terminal and case: 500 V AC/min with 1 ma or less leakage current Installable in any position ranging from upright to sideways (90 tilted) *Always install in upright position outdoors. 0 % (fully closed) 30,000 returns Options For options, separate order is required. Item Specification Seal connector Applicable wire size: φ7 mm to φ9 mm (Part No ) (Seal connector is necessary for IEC IP54 protection.) Auxiliary switches Number of auxiliary switches: 2 (SW A and SW B) (Part No ) Maximum applied voltage/current: 30 V DC / 3 A DC Actuating position SW A: Adjustable between 0 % (fully closed) to 100 % (fully open) SW B: Adjustable between 0 % (fully closed) to 100 % (fully open) Auxiliary potentiometer (Part No ) Number of auxiliary potentiometer: 1 Overall resistance: Nominal 1 kω Actuating position: 0 % (fully closed) to 100 % (fully open) Max. applied voltage: 5 V DC Note: Either of an auxiliary switch or an auxiliary potentiometer can be added, but not both. 5
6 CE Marking Conformity This product complies with the following Electromagnetic Compatibility (EMC). EMC : EN , EN55011 Class A Dimensions Model VY51X5K/VY51X5H (JIS FC200 valve, FF flanged) (See Note.) Note: Leave a clearance of 300 mm if you open the top cover after the ACTIVAL is installed. Model VY51X5K00XX Model number Valve size H (mm) H 1 (mm) L (mm) L 1 (mm) t (mm) φc (mm) φd (mm) φh (mm) N Weight (kg) VY51X5K001X DN VY51X5K002X DN VY51X5K004X DN VY51X5K0051 DN VY51X5K0061 DN VY51X5K0081 DN Model VY51X5H00X1 Model number Valve size H (mm) H 1 (mm) L (mm) L 1 (mm) t (mm) φc (mm) φd (mm) φh (mm) N Weight (kg) VY51X5H0061 DN VY51X5H0081 DN Figure 1. Dimensions and maintenance clearance (mm): Models VY51X5K00XX, VY51X5H00X1 6
7 Model VY51X6K/VY51X6H (JIS SCS13A valve, RF flanged) (See Note.) Model VY51X6K00XX Note: Leave a clearance of 300 mm if you open the top cover after the ACTIVAL is installed. Model number Valve size H (mm) H 1 (mm) L (mm) L 1 (mm) t (mm) φc (mm) φd (mm) φg (mm) φh (mm) N Weight (kg) VY51X6K001X DN VY51X6K002X DN VY51X6K004X DN VY51X6K0051 DN VY51X6K0061 DN VY51X6K0081 DN Model VY51X6H00X1 Model number Valve size H (mm) H 1 (mm) L (mm) L 1 (mm) t (mm) φc (mm) φd (mm) φg (mm) φh (mm) N Weight (kg) VY51X6K0061 DN VY51X6K0081 DN Figure 2. Dimensions and maintenance clearance (mm): Models VY51X6K00XX, VY51X6H00X1 7
8 Parts Identification Top cover Terminal cover Actuator Knockout hole Pointer Spring unit Yoke Gland Bonnet Stem Seat ring Plug Valve body : Heat insulation Figure 3. Parts identification 8
9 Installation Precautions for installation CAUTION Disconnect power from ACTIVAL before performing any wiring or maintenance (installation) to prevent equipment damage. Install the ACTIVAL in the position as specified in this manual. Excessively tight connection of piping and improper installation position may damage the valve. After piping installation, make sure no fluid leaks from the connecting parts. Incorrect piping may cause fluid leakage. Do not allow any foreign substance inside the piping. Flush the piping so that no foreign substance remains. Foreign substance may damage the valve. ACTIVAL Model VY51XXK/VY51XXH is the valve and actuator integrated into a single unit. Do not combine the valve with any other actuator, or do not combine the actuator with any other valve. To remove foreign substances inside the pipes, install a strainer (with 80 or more meshes recommended for steam control) on the inflow side of each valve. In case that the strainers cannot be installed on the inflow side of each valve, install it on the pipe diverting sections (sections diverting from main piping system to sub piping system). Install the valve so that the flow direction of process fluid agrees with the arrow indicated on the valve body. Installation location CAUTION Avoid using the ACTIVAL in an atmosphere containing oxidizing or explosive gas since it may corrode the actuator, valve, or their components. The actuator may malfunction if being exposed to high heat radiation. Do not install it near by steam coil or hot water (in high temperature) coil. IMPORTANT: The covers might be corroded by some chemical and organic solvent/vapor. Do not clean the ACTIVAL using such substances, or do not expose the ACTIVAL to such substances. When the ACTIVAL is used for steam humidifying, install a valve interlocking with air-conditioning unit on the inflow side in case the ACTIVAL gets damaged. Although the ACTIVAL can be used in high humidity environments (max. 95 %RH), do not immerse the actuator in water. Although the ACTIVAL can also be used outdoors, be sure not to expose the ACTIVAL to direct sunlight. When the ACTIVAL is used for steam humidifying, set the high limit alarm of supply air temperature in case that the valve fails to properly operate. For critical piping system, in addition to the high limit alarm of supply air temperature, set the high and low limit alarms of humidity for AHU (air handling unit) operation, and on the inflow side, install a valve interlocking with the AHU fan. Install the ACTIVAL in a position allowing easy access for maintenance and inspection. Figs. 1 and 2 show the minimum clearance for maintenance and inspection. When installing the ACTIVAL in a ceiling space, provide an access hole within the 50 cm radius of the ACTIVAL. And, place a drain pan under the valve. Do not mount the ACTIVAL on a pipe where water hammer may occur or solid objects including slug may accumulate. Mounting position The ACTIVAL can be mounted in any position ranging from upright to sideways (90 tilted). The ACTIVAL should be installed with its actuator vertically positioned above the valve body. (See Fig. 4.) However, the ACTIVAL must be installed always in upright position outdoors. Correct mounting Incorrect mounting Figure 4. Examples of mounting position 9
10 Piping Check that the model number of the product is what you ordered. The model number is shown on the label attached to the yoke. Install a bypass pipe and gate valves on the inflow, outflow, and bypass sides. Also, install a strainer (with 80 or more meshes recommended for steam control) on the inflow side. When piping, do not allow any object, such as chips, to get inside a pipe or valve. Valve cannot fully close, or the valve seat may get damaged causing fluid leakage, due to an object jammed inside the valve. When piping, do not apply too much sealing material, such as solidifying liquid and tape, to the pipe connection sections so that these materials flow into the valve. Valve cannot fully closes, or the valve seat may get damaged causing fluid leakage, due to the sealing material jammed inside the valve. Before activating the ACTIVAL, flush the pipes (with the ACTIVAL installed) at the maximum flow rate to remove all the foreign substances. Fully open (100 % position) the ACTIVAL to flush. (Factory preset position: 0 %) Heat insulation Do not apply heat insulation to the actuator or to the yoke, as shows in Fig. 3. If the yoke and the actuator are covered with insulation material, the pointer cannot be checked and may be distorted. Factory preset position The actuator shaft is positioned at 0% (in fully open position) for shipment. The shaft is thus completely turned counterclockwise, and the pointer points at 0. (See Fig. 5.) Pointer Figure 5. Pointer position for shipment Auxiliary switch / Auxiliary potentiometer (optional) IMPORTANT: The auxiliary switch/potentiometer is installed on site. Refer to the instructions supplied with the auxiliary switch/potentiometer for installation. Do not open the top cover except when adjusting the auxiliary switch/potentiometer. Close the top cover instantly after adjusting the auxiliary switch/potentiometer. Do not put any load on the top cover. 10
11 Wiring CAUTION Disconnect power from ACTIVAL before performing any wiring or maintenance (installation) to prevent equipment damage. IMPORTANT: The ACTIVAL is designed for 24 V AC power supply voltage. Do not apply any other power voltage (e.g., 100 V AC, 200 V AC) to the ACTIVAL. Make sure the polarity of the power supply and 2-10 V DC feedback output for 2-10 V DC input and 4-20 ma DC input types, referring to the wiring diagrams. Incorrect wiring may result in PCB (print circuit board) burnout. To prevent damage, cover the terminals except when connecting/disconnecting wires. Do not connect 24 V AC power to the terminals 4 to 7. Wiring precautions 1) To lead the wires into the terminals, cut out a knockout hole for a wiring port. Two knockout holes are provided on the bilateral sides of the actuator terminals. Select a knockout hole according to the conduit mounting direction, and cut it out by lightly knocking the hole using a screwdriver. Knockout hole for wiring port Figure 6. Knockout hole for wiring port 2) Unscrew the 3 setscrews (M4 10) of the terminal cover and remove the terminal cover, as shown in Fig. 7. Setscrews Terminal cover 1. Unscrew the setscrews. Figure 7. Terminal cover removal 2. Remove terminal cover. 3) Correctly connect the wires to the terminals with M3.5 screw terminal lugs, referring to Figs 8 to 16. 4) When the ACTIVAL is used in a high-humidity environment or outdoors, use a water-proof connector for the wiring port. To keep IP54 protection (dust-proof and splash-proof), Use a water-proof connector for the ACTIVAL in a high-humidity environment or outdoor location. Be sure to completely close the terminal cover and the top cover. Waterproof the wiring port. - For cable connection, use a water-proof connector. (Seal connector Part No is recommended.) - For conduit connection, use a water-proof plica tube or the like. 11
12 Terminals connection Model VY511XK/VY511XH Close (C) Open (O) Close (C) Open (O) Electromagnetic clutch When power supply is disconnected between terminals 3 and 7, the actuator fully closes the valve (in 0 % position). Figure 8. Terminals connection of Model VY512XK/VY512XH (Nominal 135 Ω feedback potentiometer type) Note: Controller that receives voltage between the terminals 4 and 6 as feedback signal is recommended to connect. E V : Circuit of recommended controller : Voltage applied from controller : Voltage between terminals 4 and Figure 9. Circuit of recommended controller E V Model VY512XK/VY512XH 24 V AC power supply Nominal 135 Ω resistance input from controller Model VY513XK/VY513XH 24 V AC power supply 4-20 ma DC inputs from controller 2-10 V DC feedback output T 1 T 2 Vacant W B R Vacant T 1 T 2 Vacant When power supply is disconnected, the actuator fully closes the valve (in 0 % position). Figure 10. Terminals connection of Model VY512XK/VY512XH (Nominal 135 Ω resistance input type) Model VY514XK/VY514XH 24 V AC 2-10 V DC inputs power supply from controller 2-10 V DC feedback output When power supply is disconnected, the actuator fully closes the valve (in 0 % position). Note: Terminals 2, 5, and 7 are connected inside the actuator. Figure 11. Terminals connection of Model VY513XK/VY513XH (4-20 ma DC input type) T 1 T 2 Vacant When power supply is disconnected, the actuator fully closes the valve (in 0 % position). Note: Terminals 2, 5, and 7 are connected inside the actuator. Figure 12. Terminals connection of Model VY514XK/VY514XH (2-10 V DC input type) 12
13 Connection examples (Connection to Azbil Corporation s controllers) Connection to Infilex GC (Model WY5111) Connection to Neostat (Model TY900XZ) Power supply Isolation transformer 1 T 1 2 T 2 MM output TR Infilex GC 7 Model WY5111 Power supply Model VY511XK/VY511XH (Nominal 135 Ω feedback TR: Isolation transformer potentiometer type) Figure 13. Connection example: Model VY511XK/VY511XH to Model WY Electromagnetic clutch W B R Neostat Model TY900XZ Wire color W: White B: Blue R: Red 4 W 5 B 6 R Model VY512XK/VY512XH (Nominal 135 Ω resistance input) Figure 14. Connection example: Model VY512XK/VY512XH to Model TY900XZ Connection to R series (Model R35/R36)controller Connection to Infilex AC (Model WY5117) Power supply Isolation transformer 1 T 1 2 T 2 Power supply Isolation transformer 1 T 1 2 T Model R35TC0/R36TC0 6 + Infilex AC Model WY Model VY513XK/VY513XH Position indicator (4-20 ma DC input with 2-10 V DC output type) Note: The terminals 2, 5, and 7 of the actuator are not isolated inside. Figure 15. Connection example: Model VY513XK/VY513XH to Model R35TC0/R36TC Model VY514XK/VY514XH Position indicator (2-10 V DC input with 2-10 V DC output type) Note: The terminals 2, 5, and 7 of the actuator are not isolated inside. Figure 16. Connection example: Model VY515XK/VY515XH to Model WY
14 Internal Connection of Auxiliary Switch / Auxiliary Potentiometer Auxiliary switch Part No OP1 OP2 OP3 OP4 OP5 Common Common N.C. N.O. N.C. N.O. Switch A Switch B OP6 Switches A and B actuating position: Adjustable between 0 % (fully closed) and 100 % (fully open) Figure 17. Internal connection of Auxiliary switch Part No Auxiliary potentiometer Part No OP1 Open Close OP2 OP3 Potentiometer operating position: Between 0 % (fully closed) and 100 % (fully open) Figure 18. Internal connection of Auxiliary potentiometer Part No
15 Inspection and Maintenance CAUTION Avoid touching the installed ACTIVAL (valve body, yoke, joint). When being used to control hot water, it reaches high temperature and may cause burn injury. Inspect the ACTIVAL according to Table 1. Open/close the installed ACTIVAL at least once a month if it is left in inactive state for a long period. Visually inspect the fluid leakage of the valve and the actuator operations every six months. If any of the problems described in Table 2 are found, take corresponding actions shown in the table. If your problem is not solved by the corresponding action, please contact Azbil Corporation near you. Table 1. Inspection items and details Inspection item Inspection interval Inspection detail Visual inspection Semiannual Fluid leakage from the gland and the flange face Loosened bolts Valve and actuator damages Operating status Semiannual Unstable open/close operation Abnormal noise and vibration Routine inspection Any time Fluid leakage to the outside Abnormal noise and vibration Unstable open/close operation Valve hunting Table 2. Troubleshooting Problem Part to check Action Fluid leaks from the flange face. Loosened flange bolts Gasket on the flange face Misaligned piping Tighten the flange bolts. Replace the gasket. Redo piping. Fluid leaks from the gland part. Consult with our sales/service personnel. Fluid leaks from the bonnet. Loosened bolts Tighten the bolts. Valve does not operate smoothly / valve stops halfway / valve does not operate at all. Fluid leaks to the outside of the valve when the ACTIVAL is in fully closed position. The valve vibrates or produces an abnormal noise. The auxiliary switch does not actuate. The auxiliary potentiometer does not operate. Valve hunting occurs. Conditions of the power applied and of the input signal applied Loosened terminals Wiring condition / disconnected wires Actuator pointer not pointing to fully closed position Primary pressure condition Differential pressure condition Auxiliary switch (cam switch) condition Loosened terminals Wiring condition / disconnected wires Condition of resistance Loosened terminals Wiring condition / disconnected wires Secondary pressure condition Differential pressure condition Control stability Operating time of the spring return is too short. Wiring condition of the brake motor Operating time of the spring return is too long. Torque of valve operation The spring return does not operate. The actuator does not fully closes the valve (in 0 % position). Voltage/current input signal disagrees with the feedback output signal. Check the power supply and the controller connected to. Tighten the terminals. Check the wiring. Fully close the ACTIVAL. Adjust the mounting position. Change the installation location. Redo the cam switch setting. Tighten the terminals. Check the wiring. Check the resistance value (1 kω). Tighten the terminals. Check the wiring. Adjust the mounting position and change the installation location. Correct the control parameter setting of controller. Consult with our sales/service personnel. Consult with our sales/service personnel. Consult with our sales/service personnel. To completely shut off the valve, valve open and close (0-100% position) operation is controlled by % range of actuator voltage/current input signal. Voltage/current input signal therefore disagrees with the feedback signal, and this is not an error. 15
16 ACTIVAL, Infilex, Neostat are trademarks or registered trademarks of Azbil Corporation in Japan or in other countries. Specifications are subject to change without notice. Building Systems Company Kawana, Fujisawa, Kanagawa JAPAN Rev. 5.0 Dec AB-6526 (J: AI-6526 Rev. 5.0). 16
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