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Teral NX-VFC-e Instruction Manual

Estimated terminal pressure constant control of water supply unit
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Instruction Manual
Estimated Terminal Pressure Constant
Control of Water Supply Unit
NX-VFC-e
Important Notice
Thank you very much for purchasing the TERAL water supply unit.
In order to use the water supply nuit appropriately, read this instruction manual
before using, and do not perform operation, maintenance and inspection before
understanding the description in this manual thoroughly.
For safety purpose, observe the cautions and warnings in this instruction manual
and those on the labels affixed on the water supply unit.
Keep this manual carefully at hand where it can be consulted at any time of
operation, maintenance and inspection of the water supply unit.
Warning
Do not keep combustible materials such as the manual or other drawing inside the
control panel of the water supply unit (except when a drawing holder is inside).
To whom performing utility work:
Be sure to submit this manual to the customer performing
operation, maintenance and inspection of the water supply unit.

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Summary of Contents for Teral NX-VFC-e

  • Page 1 Control of Water Supply Unit NX-VFC-e Important Notice Thank you very much for purchasing the TERAL water supply unit. In order to use the water supply nuit appropriately, read this instruction manual before using, and do not perform operation, maintenance and inspection before understanding the description in this manual thoroughly.
  • Page 2 (6) Failures and breakage caused by any use outside the specification limit of the equipment Teral Inc. shall not be liable for any damage caused by incorrect or reckless use of the water supply unit even if such damage occurs within the warranty period. Cost and expenses incurred for sending engineer(s) in such a case shall be borne by the user.

  • Page 3: Table Of Contents

    Contents Safety precautions ············································································································1-1 Explanation of safety indications and graphic symbols························································1-1 Safety precautions······································································································1-1 Before using the water supply unit························································································2-1 Points to be checked···································································································2-1 Model type description·································································································2-1 Configuration and overview of the water supply unit ·································································3-1 Specifications of the water supply unit·············································································3-1 Names and functions of each part ··················································································3-2 Specifications of control panel·······················································································3-6 Specification tables·····································································································3-7...

  • Page 4: Safety Precautions

    1. Safety precautions Before using the unit, thoroughly read this “Safety precautions” to properly use the product. Information described below is vital to safe and proper use of the unit and prevention of hazard and/or damage. Explanation of safety indications and graphic symbols This instruction manual divides safety indications into four categories according to the level of hazard (the extent of damage/losses and the urgency).
  • Page 5 Teral inc. Otherwise, it may lead to injury, failures and/or various If unskilled personnel carry out the work that requires special accidents.
  • Page 6 Otherwise, it may lead to injury and/or damage. In the event of an alarm or abnormal condition that Ensure to carry out inspection according to the cannot be resolved, immediately contact Teral Inc. maintenance checklist. or its service provider. Otherwise, you cannot prevent potential failures, thus leading to a higher risk of accidents.

  • Page 7: Before Using The Water Supply Unit

    2. Before using the water supply unit Make sure that the delivered package is placed right-side up before Caution unpacking. Pay special attention to nails especially when opening a wooden crate or you may get injured. After unpacking, ask the vendor to dispose of packaging materials that Note are no longer necessary.

  • Page 8: Configuration And Overview Of The Water Supply Unit

    Do not use this unit under any conditions other than those provided in Caution the specifications. Otherwise, electric shock, fire, water leakage, or property damage may occur. If the inflow pump head is 5m or more, contact Teral. for consultation. Note Table 3-1 Standard specifications of water supply unit Operation mode...

  • Page 9: Names And Functions Of Each Part

    A ir vent plug of pump This plug is used to release air from the pump. Pump drain This drain is used to discharge water from the pump. Automatic alternate operation Automatic alternate parallel operation Fig. 3-2-1 Water supply unit, Model NX-VFC-e...
  • Page 10 3.2.2 Names and functions of control panel elements (1) Display It displays a variety of information about the water supply unit. ( see 7.4) (2) Operation selector switch #1 operation #2 operation Power The switch is to change the operation mode of #1 Block #2 Block Failure...
  • Page 11 3.2.3 Configuration of the control panel Be careful when the control panel is powered on because a high voltage is running through the parts inside the control panel and it is Warning very dangerous. Do not allow any persons other than qualified personnel to open the cover of the control panel.
  • Page 12 3.2.4 Control board The following are the details of the control board. Do not remove the protective cover on the control board or the cover of Warning the I/O terminal block when the power is turned on. Otherwise, it may lead to an electric shock. I/O terminal block Operation power...

  • Page 13: Specifications Of Control Panel

    Specifications of control panel Table 3-3 Specifications of control panel Item Specifications 1 Specifications 2 Control panel model BQNXC Operation mode Automatic alternate/automatic alternate parallel 0.4 to 3.7 kW: ACS resin (light gray/material color) + steel plate (highly corrosion-resistant hot-dip plating) Material and external color of casing 5.5, 7.5 kW: steel plate (Munsell 5Y7/1 semigloss/baking finish)

  • Page 14: Specification Tables

    Specification tables 3.4.1 Standard models (boost models) Automatic alternate operation <boost models> Nominal diameter Standard specifications Specified ranges Pressure tank Discharge Output Phase/Voltage pre-charge Maximum Minimum Stop pressure Model Total head Suction pressure Pump Unit water sustained (approximate Water supply head selection condition...
  • Page 15 3.4.2 Special models (lifting models) Automatic alternate operation <lifting models> Nominal diameter Standard specifications Specified ranges Pressure tank Discharge Output Phase/Voltage pre-charge Maximum Minimum Stop pressure Model Total head pressure Suction Pump Unit water sustained (approximate Water supply head selection MPa (kgf/cm condition suction...

  • Page 16: Installation

    4. Installation Precautions for installation When moving or installing the unit, never lift it in an unstable condition or with any load applied to the pressure tank, pipes, or control panel. Otherwise, the unit may fall, resulting in injury and/or damage. Warning Before lifting the unit, refer to the catalog, the external dimensions drawing, or other documents to check the weight of the unit, and use an...

  • Page 17: Precautions For Piping Work

    Precautions for piping work Do not screw a pipe into the pump with the companion flange attached Caution to the pump. Otherwise, it may damage the pump. Do not merge the suction pipes. Do not install the piping with a shape of upward bend (i.e.

  • Page 18: Precautions For Wiring Work

    Precautions for wiring work Use the wiring equipment and devices compliant to use conditions, and carry out wiring work safely and securely according to the technical standards for electrical facilities, as well as the indoor wiring Warning regulations. Only qualified personnel such as licensed electrical engineers are allowed to carry out electric wiring work.
  • Page 19 4.3.2 Instrumentation Carry out wiring work for instrumentation according to the following procedure: Connect all the wires for instrumentation (hereafter “the instrumentation wires”) to the terminal block on the control board. For the models with a motor output of up to 3.7kW, observe the following instructions on connecting the wires to the control board.
  • Page 20 Table 4-3-2 (a) Wiring patterns (ball tap type) Single receiver tank Double receiver tank Control panel Control panel Level regulating Level regulating Level regulating valve valve valve Ball tap Ball tap Ball tap Receiver tank Receiver tank #2 Receiver tank #1 Water supply unit Water supply unit Tank Selection setting:...
  • Page 21 Table 4-3-2 (b) Wiring patterns (inflow solenoid valve type) Single receiver tank Double receiver tank Control panel Control panel Level regulating Level regulating Level regulating valve valve valve Receiver tank #2 Receiver tank #1 Receiver tank Water supply unit Water supply unit Tank Selection setting: No.1 Tank Selection setting:...
  • Page 22 (2) External output signals Connect wires to the external output terminals as shown in the following diagram. External output terminals (I/O terminal block on control board) Fig. 4-3-2(b) Settings for standard models (Parameter P100: “0”) The parameter P100 allows you to select an external relay output pattern from Note 5 options.

  • Page 23: Preparation For Operation

    5. Preparation for operation Points to be checked before test operation 5.1.1 Electrical system Before carrying out work such as wiring change, be sure to shut down Warning the power of the panel board and confirm that the pilot lamp is turned off.

  • Page 24: Turning On The Power

    Turning on the power After turning on the power, do not touch any parts other than those Danger mentioned below that are required for operation. Otherwise, it may lead to an electric shock. Do not operate the control panel with a wet hand. Otherwise, it may Warning lead to an electric shock and/or a short circuit.

  • Page 25: Test Operation

    6. Test operation Check items related to manual operation Check the following items related to manual operation for all the pumps. Note Operation (1) Select “Manual” with the switch. select (2) Press the “Manual” switch of the pump that you wish to run, and then hold down the cursor switch gradually increase the operating frequency.
  • Page 26 6.2.1 Automatic alternate operation type In automatic alternate operation, two pumps : Total head Discharge pressure : Minimum sustained head alternately start automatically when the pressure in : Stop flow rate the pipe drops to a certain level, and the running : Maximum water supply rate pump stops automatically when the water usage Specified point...

  • Page 27: Basic Operations And Indications/Settings

    7. Basic operations and indications/settings This chapter mainly covers the details of operations/indications/settings. Operating the pump 7.1.1 Selecting the operation mode Operation Select an operation mode with the switch on the operation panel. Selector Table 7-1 Selecting the operation mode “Manual mode”...

  • Page 28: Selecting A Receiver Tank

    Selecting a receiver tank Tank Select a receiver tank to be used with the switch on the operation panel. selector For the tank selection and the circuits to be used, see Table 7-2(b). Table 7-2 (a) Tank Selection Setting “No tank” Select this option if no control is carried out for receiver tanks.

  • Page 29: Selecting The Operation Of The Inflow Solenoid Valve

    Selecting the operation of the inflow solenoid valve Solenoid You can select the operation of the inflow solenoid valve with the valve switch on the operation panel. operation selector Note that setting the Tank Selection to “No tank” disables these settings. Table 7-3 Solenoid Valve Operation setting Man.

  • Page 30: Indications On The Display

    Indications on the display The items described in Table 7-4 can be displayed, through display switching procedures. For the procedures, refer to each section shown in the “Reference page” column. Table 7-4 List of display items Reference Display item Description Priority Category page...
  • Page 31 7.4.1 How to switch basic information on the display Normally, the display shows the pressure in the Display discharge piping. In special cases such as the activation of an interlock, the occurrence of an alarm, or during the freeze-proofing cycle, however, the display shows the corresponding message based on the sequence specified in Table 7-4.
  • Page 32 7.4.2 How to display alarm logs Press the switch at Manual Confirm Alarm log display mode the alarm log display If no alarm log exists transition point "no” and “Err” are alternatively displayed to enter the alarm log Manual display mode. Confirm When alarm logs exist In the alarm log display...

  • Page 33: Parameter Settings

    (B) If the operation mode is set to “Manual”: When basic information is #n Pump information Other pump information displayed, press the Preset frequency displayed e.g. 10 Hz The long-press switch will switch and the No.1 continuously increase or decrease the preset frequency. Normal pump information is displayed.
  • Page 34 7.5.2 How to set the parameters Parameters are set in “Setting mode.” Entering the setting mode When the normal indication is displayed, hold down the Setting switch for at least 3 seconds to enter the “setting mode.” When the system enters the setting mode, the basic parameter selection screen appears, and the indicator light alternately shows and the setting value.
  • Page 35 Canceling the change of the setting value To cancel the change of the setting value and return to the parameter selection screen, press the switch. Manual Back Exiting the setting mode Press the switch to exit the setting mode and return to the normal mode. Setting Also when no operation is carried out for 60 seconds in the setting mode, the system automatically exits the setting mode and returns to the normal mode.
  • Page 36 7.5.3 Basic parameters The following are basic parameters for using the water supply unit. (1) Total head setting : Total Head Seletcts the total head for automatic operation. Function Referring to “3.4 Specification tables,” set the total head that complies with the specifications.
  • Page 37 (4) Inspection mode setting : Inspection Mode Enters/Exits the inspection mode. Function * The inspection mode setting is not retained when the power is shut off. : In inspection mode Setting range : In normal mode Initial setting : In normal mode Remarks For the inspection mode, refer to “8.2 Inspection mode.”...
  • Page 38 7.5.4 Extended parameters The following are extended parameters for setting or adjusting various functions of the water supply unit. Extended parameters can be changed only when the operation mode is set to Note “Stop.” Therefore, make the settings before starting the operation of the water supply unit.
  • Page 39 (2) Number of water level electrode bars setting : Number of Water Level Electrode Bars Function Seletcts the number of electrode bars for measuring the water level Adjustable 4: 4 electrode bars (4P) range 5: 5 electrode bars (5P) 4: 4 electrode bars (4P) Initial setting (If you specify the other value upon placing an order, the specified value is preset in the parameter.)
  • Page 40 (5) Solenoid valve control method setting : Solenoid Valve Control Method When the Tank Selection is set to “Common” and the Solenoid Valve Operation is set to “Auto,” selects whether the solenoid valve for Tank Function No.1 and the solenoid valve for Tank No.2 are controlled simultaneously or alternately.
  • Page 41 (8) High temperature alarm detection setting : High Temperature Alarm Detection Function Seletcts whether or not to detect a high temperature alarm. Adjustable 0: No detection range 1: Detection 1: Detection (If you specify the other value upon placing an order, the Initial setting specified value is preset in the parameter.) Use the water supply unit by selecting “Detection”...

  • Page 42: Maintenance And Inspection

    If any problem is found during inspection, immediately stop operation, Warning and remove the cause or contact Teral. or its relevant service company. Otherwise, it may lead to an accident. (1) When carrying out a daily inspection, carefully observe the following points: A large deviation in the pump’s discharge pressure, current, vibration, noise, or other conditions from...

  • Page 43: Inspection Mode

    Inspection mode You can put the system into the inspection mode to nortify other personnel that inspection is in progress. (1) Entering and exiting the inspection mode ( see 7.5.) To enter the inspection mode Set the basic parameter to “on.” To exit the inspection mode Set the basic parameter to “off.”...

  • Page 44: Maintenance Check List

    Caution inspection that requires disassembly of the unit, be sure to contact a specialized vendor or the service center specified by Teral. Incorrect work may cause a failure or accident. Do not perform an insulation resistance test on the control panel. Before...
  • Page 45 Table 8-3(b) Maintenance check list Replacement cycle of consumables Frequency (as a guide) Inspection point Inspection item Method Criterion Replacement Consumable Qty. cycle Visual Head As per the specifications check Electric current value Measure As per the specifications Operating conditions Listen Noise, vibration No abnormal condition...

  • Page 46: How To Handle Troubles

    9. How to handle troubles In the event of an alarm or abnormal condition that cannot be resolved, immediately stop the operation and contact Teral. or its service company. Otherwise, it may lead to an accident. Caution Before the contact, check the status of abnormal condition and the alarm code No., as well as information shown on the nameplate, and...

  • Page 47: Troubleshooting

    Troubleshooting Table 9-2(a) Troubleshooting Alarm Description Probable cause Remedy code Water flows into the tank continuously because Set the Solenoid Valve Operation to “Auto.” the Solenoid Valve Operation setting is set to “Man. Open.” Water does not stop running because of a Check and/or replace the ball tap.
  • Page 48 Table 9-2(b) Troubleshooting Alarm Description Probable cause Remedy code An overload has occurred because the unit is Adjust the load so that it falls within the running at a flow rate outside the specified specified range. range. An overload has occurred because of damage It is necessary to replace the bearings.
  • Page 49 Table 9-2(c) Troubleshooting Alarm Description Probable cause Remedy code The flow switch is broken or its wiring is disconnected. E105 No.1 flow switch failure It is necessary to check and/or replace the flow Or, the flow switch is not working properly E205 No.2 flow switch failure switch.

  • Page 50: Special Models

    10. Special models 10.1 Lifting models This section describes the lifting models. Orifice Union The lifting models allow lifting operation of up to 4 m in the actual head and of up to 6 m in the total head. The lifting models come standard with a constant relief kit (an orifice, a ball valve, a nipple, and a union).

  • Page 51: Freeze-Proof Models

    10.2 Freeze-proof models This section describes our freeze-proof models designed to protect the unit against freezing in winter. The freeze-proof models come standard with the freeze-proof kit. A standard model can be modified to the freeze-proof model. Note For further information, contact us. Freeze-proof kit Low-temperature sensor Note:...
  • Page 52 Head Office 230, Moriwake, Miyuki-cho, Fukuyama-city, Hiroshima, 720-0003, Japan Tel.+81-84-955-1111 Fax.+81-84-955-5777 www.teral.net 2017 04 E‑IMN‑00265‑010‑T...

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