energy meter: calculation unit · if the flow meter is installed onto the supply water pipe, the...

AB-6559

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Specifications/Instructions

Energy Meter: Calculation Unit

(Thermal Unit: J)

General

Model WTY8000A is the calculation and display unit of the energy

meter. The calculation unit in combination with the thermal sensor and the electromagnetic flow meter functions as the energy meter for chilled/hot water. The platinum resistance temperature detector Model TY7840 (two detectors/set) is used for the thermal sensor, and the electromagnetic flow meter MagneW™ 3000 series is used for the flow meter.

Temp: Temperature

Figure 1. Components of the energy meter

Basic function of this energy meter is measurement and integration of the energy consumed by the HVAC piping system. (Thermal unit is J (joule).) The energy meter is thus suitable for heating/cooling energy management of the building chiller plant system or air conditioning unit.

HVAC: heating, ventilation, and air conditioning

Features

High visibility: Full graphic LCD with two display modes enhances the visibility. Single data display mode shows the data with larger characters, and multiple data display mode shows the multiple data in a single screen. In addition to the integrated consumption energy, various data such as integrated consumption flow, instantaneous consumption flow, supply water temperature, return water temperature, and difference between supply and return water temperature can be displayed.

CompactFlash™ (CF) memory card: Collected data (energy consumption, flow, temperature) are saved in CSV format into the CF memory card. Data collecting cycle can be set at one minute or longer, and the data collected for one year can be saved. This allows you to analyze the collected data from short- term perspective (e.g., change of the load) to long-term perspective (e.g., seasonal operating conditions).

Trend graphs: 30 minute period data of the instantaneous energy consumption, instantaneous flow, supply water temperature, and return water temperature for 24 hours are graphed out. The trend graphs are useful to analyze the stable supply water temperature, the temperature difference, and the tendency of energy consumption.

Energy demand: 30-minute moving average data of the energy demand and the maximum energy demand are displayed and recorded in CSV format. Besides, the setpoint excess alarm and excess time (period during the energy demand being over the setpoint) are displayed and recorded in CSV format. This helps to calculate the basic charge of the contracted energy, check the maximum energy demand during the billing period, discuss about the excess of the contracted energy.

Support functions for chiller plant control: - Temperature low limit is -20 °C, and brine is applicable to

the energy meter in addition to water. - The energy coefficient setting allows the flow meter to be

installed either in a return pipe or supply pipe. - Analog output data updated every one second is

applicable to the temperature control and pressure control.

- Analog outputs are electrically isolated from each other to enhance electric reliability.

CSV: comma-separated values LCD: liquid crystal display

Energy meter

Calculation unit

Temp sensor

Flow meter

Model WTY8000A

Model TY7840

(MagneW 3000 series)

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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 oursales representative. Azbil Corporation will not bear any responsibility for the results produced by the operators.

Warnings and Cautions

WARNING Alerts users that improper handling may cause death or serious injury.

CAUTION Alerts users that improper handling may cause minor injury or material loss.

Signs

Alerts users possible hazardous conditions caused by erroneous operation or erroneous use. The symbol inside indicates the specific type of danger. (For example, the sign on the left warns of the risk of electric shock.)

Notifies users that specific actions are prohibited to prevent possible danger. The symbol inside graphically indicates the prohibited action. (For example, the sign on the left notifies that disassembly is prohibited.)

Instructs users to carry out a specific obligatory action to prevent possible danger. The symbol inside graphically indicates the actual action to be carried out. (For example, the sign on the left indicates general instructions.)

WARNING

Be sure to ground the product with ground resistance of less than 100 Ω. Improper grounding might cause electric shock or malfunction.

Detach the terminal cover only when wiring the product. Before detaching the terminal cover, be sure to turn off the power to the product. After wiring, be sure to reattach the terminal cover. Failure to do so might cause electric shock.

Before wiring and maintenance, be sure to turn off the power to the product. Failure to do so might cause electric shock.

Install this product in a location out of reach of unauthorized persons. (e.g., inside of the control panel.) Failure to do so might cause electric shock.

CAUTION (1/2)

Install the product in a location that satisfies the operating conditions (temperature, humidity, power, vibration, shock, mounting direction,, atmospheric condition, etc.) as listed in the specifications and use the product within the operating ranges as listed in the specifications. Failure to do so might cause fire or device failure.

Installation and wiring must be performed by qualified personnel in accordance with all applicable safety standards.

All wiring must comply with applicable codes and ordinances.

Take anti-lightning measures based on regional and building characteristics. Failure to do so might cause fire or critical damage to the products.

Take anti-noise measures if the product is installed in a location near electric noise sources. Failure to do so might cause malfunction or device failure.

Be sure to provide a circuit breaker for the power to the product as the product does not have a power switch.

To connect the wires to the screw terminals, use crimp terminal lugs with insulation. Failure to do so might cause short circuit that leads to fire or device failure.

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CAUTION (2/2)

Firmly tighten the terminal screws. Insufficient tightening of the terminal screws might cause fire or overheating. (Or correct measurement may not be assured.)

For wiring, strip each wire insulation as specified in this manual. If the strip length is longer than the specified, the stripped part of the wires will be exposed, causing electric shock or short circuit between adjacent terminals. If it is shorter, the stripped part will not contact the connector.

Do not use unused or spare terminals on the product as relay terminals. Doing so might cause malfunction.

Do not block the ventilation holes of this product. (Be sure to peel off the protective sheet after installation and wiring.)Doing so might cause fire or device failure.

If more than the rated power voltage is applied to the product, replace the product with new one for your safety. Failure to do so might cause fire or device failure.

Do not disassemble the product. Doing so might cause device failure.

When replacing the battery, read the instructions hereinafter and correctly attach the new battery to the product. - Use our specified battery. - Place the new battery with the positive and negative terminals (+, -) on the correct sides. Failure to do so might cause overheating, burst, or leakage of the battery.

Do not allow wire scraps, chips, and other refuses to enter into the product. Doing so might cause fire or product damage.

Be sure to discharge static electricity charged in your body by touching a grounded metal part before handling the product. Static electricity might damage the components of the product.

Do not use transceivers or low power wireless devices near the product. Doing so might cause radio wave interference and malfunction of the product.

Do not remove the warning labels from the product. Without the labels, users remain unaware of essential safety precautions.

Dispose of the used battery in accordance with your local regulations. Do not through it in fire or in general garbage. Doing so might cause burst or ignition.

Dispose of this product as industrial waste in accordance with your local regulations. Do not reuse all or a part of this product.

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System Configurations

Energy meter in our building management systems (savic-net™ series)

Figure 2. System configuration example: Model WTY8000A12_1 networked with NC-bus

Energy meter in a system networked with RS-485 and RS-232C

Figure 3. System configuration example: Model WTY8000A12_2 networked with RS-485 (three-wire)

savic-net™ series

Energy meter

Infilex™ AC

Infilex™ GC

Infilex™ GD

Infilex™ ZM

Infilex™ FC

Infilex™ VC

Model WTY8000A

Model WY5117

Model WY5111

Model WY5110

Model WY5122

Model WY5205

Model WY5206

NC-bus

SC-bus

Master device

RS-232C/RS-485converter

Energy meter

Slave device

Slave device

RS-232C

RS-485(three-wire)

Model WTY8000A

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Model Numbers

Base model number

Installation Output type

Function Communication

via: Inspection report

(optional) Description

WTY8000A Energy meter for chilled/hot water: Calculation unit

1 Panel mount

2 Pulse output, 4–20 mA DC output (4 pts.)

0 No data collecting or energy demand value recording function

1 Data collecting and energy demand value recording functions

0 No communication 1 NC-bus (to the building management system) 2 RS-485 (to the master device)

-A Inspection report (optional)

Optional Items

Part number Description

83171729-001 128 MB CF (CompactFlash™ memory) card 83159929-002 Bracket for mounting inside of the control panel

Operation Principle

Figure 4. Operation principle

The calculation unit of the energy meter calculates the energy at the constant period, using the following formula. Q = k·F·Δt (Q: Energy, k: Energy conversion factor, F: Return water flow, Δt: Temperature difference)

Note for setting "k": Initial value of "k" is the energy conversion factor for return water. If the flow meter is installed onto the supply water pipe, the energy conversion factor must be changed to 4.188 MJ/m3°C for cooling, 4.113 MJ/m3°C for heating. See Energy Meter: Engineering Manual (AB-6561) for details. If "k" needs to be calculated from design value and/or measured value, set the calculated value to "k."

AHU etc.

Read temperature. Read flow rate.

Detect cooling or heating.

Select k. Calculate Δt. Calculate F.

Calculate energy Q = k·F·Δt

Totalized consumption energy for cooling

Totalized consumption energy for heating

Return Supply

Temperature sensor (Model TY7840)

Flow meter: MagneW 3000 FLEX (Model TY7840)

Calculation unit (Model WTY8000A)

HeatingCooling

k Δt. F

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Parts Identification

(1) LCD: Continuously displays data. * Backlight is automatically turned off when 20 minutes have

passed since the last operation. Press any key to turn on the backlight again.

(2) CF card slot (closed): Reads and writes the data in the CF (CompactFlash memory) card.

(3) LCD brightness adjuster: Adjusts the brightness of the LCD. * Use a Phillips screw driver to turn the knob.

(4) [pwr] LED: Stays ON while the calculation unit is being powered.

(5) [mode] key: Changes over the modes.

(6) [<] key: Switches to the previous screen.

(7) [>] key: Switches to the next screen.

(8) [→] key: Highlights the numeric digit to be desired to change.

(9) [⋁] key: Decreases the highlighted numeric digit from 9 to 0 or switches between positive and negative.

(10) [⋀] key: Increases the highlighted numeric digit from 0 to 9 or switches between positive and negative.

(11) [enter] key: Enters (sets) the numeric data. * Before ejecting the CF (CompactFlash memory) card,

press and hold the [enter] key to write the data to the CF card.

(12) CF card slot (open): Reads and writes the data in the CF card.

(13) CF card eject button*: Removes the CF card. * Refer to Energy Meter: User Guide (AB-6560) for the CF

card ejection.

Figure 5. Parts identification

IMPORTANT:

Before ejecting the CF card, press and hold the [enter] key to write the data stored in the calculation unit to the CF card. "EE00" will appear on the LCD when writing is successfully finished. If the CF card is ejected without this operation, the stored data will be lost, and the CF card might get damaged.

(12)

(13)

Energy meter calculation unit (with the CF card slot open)

(1)

(2)

(3)(4)

(5)

(6)

(7)

(11) (10)

(9)

(8)

Energy meter calculation unit (with the CF card slot closed)

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Specifications

Basic specifications (1/2)

Item Specification

Type Calculation unit of the separate type energy meter (equivalent to JIS B 7550) for heating and cooling Power 100 V AC to 240 V AC, 50 Hz/60 Hz (Allowable range: -15% to +10% (85 V AC to 264 V AC) Power consumption Max. 18 VA Measuring range/calculating range Total energy/total flow/instantaneous energy/instantaneous flow*1:

Total energy Total flow Instantaneous

energy Instantaneous flow

1 0–9999.9999 TJ 0–9999.9999 dam3 0–9999 GJ/h 0–9999 m3/h 2 0–999999.99 GJ 0–9999.9999 dam3 0–999.9 GJ/h 0–9999 m3/h 3 0–999999.99 GJ 0–999999.99 m3 0–999.9 GJ/h 0–999.9 m3/h 4 0–99999.999 GJ 0–999999.99 m3 0–99.99 GJ/h 0–999.9 m3/h 5 0–99999.999 GJ 0–99999.999 m3 0–99.99 GJ/h 0–99.99 m3/h 0–1999 L/min 6 0–9999.9999 GJ 0–99999.999 m3 0–9999 MJ/h 0–99.99 m3/h 0–1999 L/min 7 0–9999.9999 GJ 0–9999.9999 m3 0–9999 MJ/h 0–9.999 m3/h 0–199.9 L/min 8 0–999.99999 GJ 0–9999.9999 m3 0–999.9 MJ/h 0–9.999 m3/h 0–199.9 L/min Supply water temperature: -20.0 °C–120.0 °C Return water temperature: -20.0 °C–120.0 °C

Cooling/heating changeover Automatic changeover with the supply water temperature or manual changeover with contact input Environmental conditions Rated operating conditions Transport/storage conditions Ambient temperature 0 °C–50 °C -20 °C–60 °C Ambient humidity 10 %RH–85 %RH 5 %RH–85 %RH Vibration 9.8 m/s2 ((1G) at 10 Hz–150Hz) 9.8 m/s2 ((1G) at 10 Hz–150Hz) Impact resistance 300 m/s2 (in the package) Data backup in the event of power failure

RAM and RTC backed up with the lithium battery

Weight 0.8 kg Materials Case: PC resin

Frame: Modified PPE Face plate: PC resin Back plate: Modified PPETerminal cover: PC resin

Accessories Sticker for sealing the parameter setting Mounting bracket Battery (with connector) CF card*2

Terminal cover Items sold separately Temperature sensor

Flow meter

JIS: Japanese Industrial Standards PPE: polyphenylene ether RAM: random access memory RTC: real-time clock Note: *1 Select from 1 to 8 and set the measuring range of the total energy, total flow, instantaneous energy, and instantaneous flow. *2 CF card is supplied with Model WTY8000A121_.

Back plate

Terminal cover

Case

Frame

Face plate

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(2/2) Item Specification

Communication NC-bus/RS-485 Points to transmit to BMS (NC-bus) /master device (RS-485)

Total energy separately set for cooling/heating, with energy demand function Item Point type Total energy for cooling Totalizer point Total energy for heating Totalizer point Total flow Totalizer point Instantaneous energy Measuring point Instantaneous flow Measuring point Supply water temperature Measuring point Return water temperature Measuring point Temperature difference between supply and return water Measuring point Cooling/heating mode Status point Energy demand value Measuring point Maximum energy demand value Measuring point Total time of the energy demand 1 exceeding the setpoint Totalizer point Total time of the energy demand 2 exceeding the setpoint Totalizer point Total energy separately set for cooling/heating, without energy demand function Item Point type Total energy for cooling Totalizer point Total energy for heating Totalizer point Total flow Totalizer point Instantaneous energy Measuring point Instantaneous flow Measuring point Supply water temperature Measuring point Return water temperature Measuring point Temperature difference between supply and return water Measuring point Cooling/heating mode Status point Total energy added together for cooling and heating Item Point type Total energy Totalizer point Total flow Totalizer point Instantaneous energy Measuring point Instantaneous flow Measuring point Supply water temperature Measuring point Return water temperature Measuring point Temperature difference between supply and return water Measuring point Cooling/heating mode Status point

IMPORTANT:

Point type of the cooing/heating mode is not the ON/OFF point, but the status point, which enables the BMS/master device to monitor the following; the cooling/heating DI being input to the energy meter or the result of the automatic cooling/heating decisionbeing made by the energy meter. To switch the cooling/heating mode of the energy meter using the BMS/master device, an additional device such as Infilex GD is needed.

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Display specifications

Item Digits Units Note

Total energy for cooling*1 8 TJ GJ Unit is automatically set according to the measuring range setting. Total energy for heating*1 8 TJ GJ

Total flow 8 dam3 m3 Instantaneous energy 4 GJ/h MJ/h Instantaneous flow 4 m3/h L/min Set either of the units according to the

measuring range setting. Supply water temperature 4 °C — Return water temperature 4 °C — Temperature difference between supply and return water 4 °C — Energy demand value*2 4 GJ/h MJ/h Unit is automatically set according to the

measuring range setting. Maximum energy demand value*2 4 GJ/h MJ/h Total time of the energy demand 1 exceeding the setpoint*2 6 min — Total time of the energy demand 2 exceeding the setpoint*2 6 min — Error code Error code (with description) —

Note: *1 One "total energy" is displayed if the total energy added together for cooling and heating is set. *2 These items are displayed when the energy demand function is enabled. However, these items are not displayed when the total energy

added together for cooling and heating is set.

Input specifications

Item Signal Note

Flow rate*1 Open collector (dry), 2000 Hz frequency maximum — Supply water temperature*2 Three-wire RTD (Pt100, equivalent to JIS Class A) Measuring error of the temperature

difference: 0.1 °C or less Return water temperature*2 Cooling/heating changeover Dry contact ON: Cooling, OFF: Heating

RTD: Resistance temperature detector Note: *1 Electromagnetic flow meter MagneW 3000 series must be used. *2 Temperature sensor (two RTD (Pt100) for one set) Model TY7840 must be used.

Output specifications

Item Signal Note

Total energy Wet (voltage) or dry (no voltage) selectable Ask our salesperson for details.

Wet H output: 19.2 V DC to 26.4 V DC

L output: 1.0 V or less Maximum load current: 60 mA

Total flow Dry Output method: Open collector

Maximum current: 100 mA Maximum applied voltage: 26.4 V DC ON residual voltage: 1.0 V or less OFF leakage current: 100 µA or less

Instantaneous energy 4 mA DC to 20 mA DC Maximum load resistance: 500 Ω

Four items out of these five items are selected by setting the parameter. Outputs are isolated from each other.

Instantaneous flow Supply water temperature Return water temperature Temperature difference Failure (also used as the energy demand alarm.)

Dry N.O. contact Maximum contact rating: 24 V AC/500 mA DC

The contact turns on when failure is detected.

Approx. 150 ms

Min. 150 ms

ON

OFF

Pulse width

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Reference accuracy

Item Reference accuracy

(at 0–80 °C temperature difference) Note

Total energy ±2.0 %RD at 10 °C/15 °C temperature difference

±1.0 %RD at 20 °C/30 °C/40 °C/50 °C/80 °C temperature difference

This accuracy is for the energy meter calculation unit in combination with the temperature sensor Model TY7840. The accuracy of the flow meter is not included. Count the wiring error (Max. 0.5 % per 50 m) into the accuracy. Instantaneous energy ±1.0 %FS

Instantaneous flow Total flow — Reference accuracy of the total flow corresponds to the

accuracy of the flow meter. Supply water temperature ±0.2 °C (at 25 °C ambient temperature)

±0.3 °C This accuracy is for the energy meter calculation unit in combination with the temperature sensor Model TY7840. Count the wiring error (Approx. 0.1 °C per 50 m) into the accuracy of supply water temperature, return water temperature, and temperature difference. Count ±0.002t (temperature coefficient equivalent to JIS Class A) into the accuracy of supply water temperature and return water temperature. (t = measured temperature) Count ±0.004Δt (temperature coefficient of the temperature sensor) into the accuracy of the temperature difference. (Δt = temperature difference)

Return water temperature Temperature difference (between supply and return water temperature)

±0.15 °C

IMPORTANT:

Temperature difference less than the low level cut value (preset with the parameter, initial setting is 0.5 °C) is not included.

For the overall accuracy of the total energy, count the measuring error of the flow meter.

Output accuracy

Item Output accuracy Note

Total energy Same as the reference accuracy —

Total flow

Instantaneous energy ±0.5 %FS The accuracy of the displayed values is not counted. Instantaneous flow Supply water temperature ±0.5 %FS with ±0.0125 °C minimum resolution Return water temperature Temperature difference

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Dimensions

Dimensions of the calculation unit (Model WTY8000A)

Figure 6. Dimensions of the calculation unit (mm)

Panel cutout dimensions

Figure 7. Panel cutout dimensions (mm)

91.5

96 167

145.

5

96

92 +0.8 0

92 +

0.8

0

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Dimensions of the bracket for mounting inside the control panel (sold separately)

Figure 8. Dimensions of the bracket for mounting inside the control panel (mm)

Image of the calculation unit mounted on the bracket for mounting inside the control panel

Figure 9. Image of the calculation unit mounted on the bracket for mounting inside of the control panel

176

230

150

280

Relay terminal blocks (for M4 screw connection)6 mm (4 holes)

Cables of the relay terminal blocks

Mou

ntin

g su

rfac

e in

side

the

cont

rol p

anel

cab

inet

250

Bracket

Calculation unit

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Installation

WARNING


CAUTION

Do not allow wire scraps, chips, and other refuses to enter into the product. Doing so might cause fire or product damage.


IMPORTANT:

Protective sheet is attached to the top surface of the calculation unit for shipment. Do not remove the protective sheet until the installation is of the calculation unit and the surrounding devices complete. Without the protective sheet, a wire scrap or refuse may come inside the calculation unit and cause short-circuit or damage the calculation unit.

Installation requirements

Install the calculation unit inside the control panel or on the control panel surface that satisfies the rated operating conditions (0–50 °C ambient temperature, 10–85 %RH ambient humidity, 9.8 m/s2 (10–150 Hz) or less vibration).

Do not install the calculation unit in a location exposed to radiation heat from other installed devices or to direct sunlight. Do not install it in a location where its LCD is difficult to see, either.

Do not install the calculation unit in a dirty or spraying location.

Provide 2 mm or thicker plate for mounting the calculation unit.

Installation on the surface of the control panel

Refer to the panel cutout dimensions (Fig. 7). Leave the maintenance spaces as shown in the following figure.

Figure 10. Maintenance space on the surface of the control panel door (mm)

Min

. 40

Min. 100 Min. 130

Min

. 40

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Installation steps

Note that the allowable mounting angle is ranging from upright to 15 degree tilted upwards. (See Fig. 11.)

1) Insert the calculation unit into the cutout window from the front surface of the control panel door.

2) Fix the top and bottom surfaces of the calculation unit using the fixtures supplied with the calculation unit. (See Fig. 12.) Fasten the screws of the fixtures till the fixtures become firmly attached to the top and bottom surfaces , and turn the screws once more to completely fix the calculation unit without being distorted.

Installation inside the control panel

Installation steps

Use the optional bracket for mounting inside the control panel.

1) Refer to Figs. 8 and 9, and mount the calculation unit on to the optional bracket in the same way as the installation on the surface of the control panel door.

2) Wire between the terminals of the calculation unit and the relay terminals of the optional bracket.

3) After wiring, install the calculation unit mounted on the bracket inside the control panel using four M5 screws. Be sure to leave maintenance clearance in between, as shown in the figure below.

Figure 13. Maintenance clearance between the optional brackets inside the control panel (mm)

4) Remove the protective sheet from the calculation unit after installation.

Figure 14. Protective sheet

Mountable angle (15°)

145.5

Upright position

Tilted position

Figure 11. Mountable angle

Fixture(Accessory of the calculation unit)

Figure 12. Mountable angle

Fixture(Accessory of the calculation unit)

150 150

Protective sheet

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Wiring

Terminals layout

1 Ο 11 Ο 21 Ο 26 Ο2 Ο 12 Ο 22 Ο 27 Ο

3 Ο 13 Ο 23 Ο 28 Ο

4 Ο 14 Ο 24 Ο 29 Ο

5 Ο 15 Ο 25 Ο 30 Ο

6 Ο 16 Ο 31 Ο7 Ο 17 Ο 32 Ο

8 Ο 18 Ο 33 Ο

9 Ο 19 Ο 34 Ο

10 Ο 20 Ο

Figure 15. Terminal layout

Description of each terminal

Refer to the Model Numbers section for the blank digits (indicated by "_") of the following model numbers.

Model WTY8000A12_0 (without communication)

No Description No Description No Description No Description

1 H 100 - 240 V AC

11 TS - A Pt100 input: Supply water temperature

21 PO1+ Pulse output:Heat/cool/

heat and cool added

26 AO3+ 4-20 mA output

2 G 12 TS - B 22 PO1-/2- 27 AO3-

3 E Ground

13 TS - B 23 PO2+ 28 AO4+ 4-20 mA output

4 E 14 TR - A Pt100 input:Return water temperature

24 PO3+ Pulse outputTotal flow

29 AO4-

5 DO+ Alarm output

15 TR - B 25 PO3- 30

6 DO- 16 TR - B 31

7 FLOW+ Flow input from MagneW3000


32

8 FLOW- 18 AO1- 33

9 DI+ Cooling/heating change input


34

10 DI- 20 AO2-

Model WTY8000A12_1 (with NC-bus communication)


1 H 100 - 240 V AC



heat and cool added


2 G 12 TS - B 22 PO1-/2- 27 AO3-

3 E Ground




29 AO4-

5 DO+ Alarm output

15 TR - B 25 PO3- 30 NC-bus+ NC-bus communication6 DO- 16 TR - B 31 NC-bus-



32

8 FLOW- 18 AO1- 33



34

10 DI- 20 AO2-

Model WTY8000A12_2 (with RS-485 communication)


1 H 100 - 240 V AC



heat and cool added


2 G 12 TS - B 22 PO1-/2- 27 AO3-

3 E Ground




29 AO4-

5 DO+ Alarm output

15 TR - B 25 PO3- 30 NC-bus+

6 DO- 16 TR - B 31 NC-bus-



32 DA RS-485

communication8 FLOW- 18 AO1- 33 DB



34 SG

10 DI- 20 AO2-

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21

22

Protectiondiode

Electromagnetic counter

Vcc (24 V DC)

Figure 18. Protection diode

Precautions for wiring

Either wet (voltage) or dry (no voltage) type is selectable for the total energy output and total flow output. Wet contact Terminals 21 and 22: Total energy output (heating) Terminals 22 and 23: Total energy output (cooling)/(batch) Terminals 24 and 25: Total flow output

Dry contact Terminals 21 and 22: Total energy output (heating) Terminals 22 and 23: Total energy output (cooling)/(batch) Terminals 24 and 25: Total flow output

Do not connect any wire to unused or spare terminals.

Apply 24 V DC or lower voltage to the dry output.

When an electromagnetic counter with a relay/coil included is used for the dry output, provide a protection diode to the input terminal of the electromagnetic counter. Failure to do so might damage the energy meter.

Do not apply 24 V DC power to the dry output before wiring to the load. Doing so might damage the energy meter.

21 22 23 24 25

+ - + + -

(Heating)

Energy output

Figure 16. Wet output

(Cooling)

/(Batch)

Flow output

21 22 23 24 25

+ - + + -+V

+V0 v 0 v

+V

Figure 17. Dry output

21

22

24 V DC

Figure 19. Incorrect wiring: 24 V DC applied to the dry output

without load being connected

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Wiring diagrams

WARNING

Detach the terminal cover only when wiring the product. Before detaching the terminal cover, be sure to turn off the power to the product. After wiring, be sure to reattach the terminal cover. Failure to do so might cause electric shock.


CAUTION

Installation and wiring must be performed by qualified personnel in accordance with all applicable safety standards.

All wiring must comply with applicable codes and ordinances.

Firmly tighten the terminal screws. Insufficient tightening of the terminal screws might cause fire or overheating. (Or correct measurement may not be assured.)

For wiring, strip each wire insulation as specified in this manual. If the strip length is longer than the specified, the stripped part of the wires will be exposed, causing electric shock or short circuit between adjacent terminals. If it is shorter, the stripped part will not contact the connector.

Do not use unused or spare terminals on the product as relay terminals. Doing so might cause malfunction.


Each input/output terminal must be wired as shown in the following wiring diagrams. The reference numbers in the below table of wiring specifications correspond to the numbers in the wiring diagrams.

Table 1. Wiring specifications Reference

number Use Recommended wire

Maximum wiring length

[1] Power supply JIS IV 2.0 mm2, JIS CVV 2.0 mm2 or greater — [2] RTD input JCS CVV-S 1.25 mm2 50 m [3] Pulse input JCS CVV-S, KPEV*-S 0.5 mm2 to 1.25 mm2 50 m [4] Contact input (for heating/cooling changeover) JCS CVV-S, KPEV-S 0.5 mm2 to 1.25 mm2 50 m [5] Contact input (for error notification) JIS IV, JIS CVV, KPEV 0.5 mm2 to 1.25 mm2 50 m [6] Pulse output JIS IV, JIS CVV, KPEV 0.5 mm2 to 1.25 mm2 50 m [7] 4–20 mA DC output JCS CVV-S 1.25 mm2 50 m [8] Communication to BMS (NC-bus) JCS IPEV-S 0.9 mm2 500 m [9] Communication to master device (RS-485) JCS CVV-S, KPEV-S 0.9 mm2 to 1.25 mm2 500 m

JCS: Japanese Electric Wire and Cable Makers' Association standard * KPEV is a wiring standard provided by Furukawa Electric Co., Ltd.

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IMPORTANT:

The power supply cables of the calculation unit installed on the surface of the control panel door must run separately from the power supply cables of other devices. Do not bind those cables together using a cable tie, etc.

Check the positive and negative terminals between the calculation unit and the flow meter. Inverted wiring maydamage the calculation unit and/or the flow meter.

Run the cables from the calculation unit away from noise-generating devices including large-capacity transformers, motors, power source, etc. Do not place the cables in a cable tray or cable duct where power supply cables of another device are placed. Output error of the calculation unit will be caused.

Provide surge arresters for power supply wiring and communication wiring in a location where lightning frequency occurs.

For waterproof and protection from external damages, cable duct and conduit are recommended. Waterproof cable gland is required for conduit connection.

Check the positive and negative terminals between the calculation unit and a device that receives the pulse output from the calculation unit. Inverted wiring may cause short-circuit.

For NC-bus wiring, do not ground the shielding of the relay terminals because the NC-bus wiring is single-point

grounded.

Power supply wiring*1

Input wiring

Output wiring

21/23/24

22/25

- +0 V

+24 V

E F

21/23 24

22 25

See [6] of Table 1.

Electromagnetic counter

+ -

E: totalized energy

F: totalized flow

Wiring to electromagnetic counter (Wet type pulse output for total energy and total flow)

Figure 24. Wiring diagram: Electromagnetic counter output (wet type)

Outputs 1, 2, 3, 4

17/19/26/28 18/20/27/29

See [7] of Table 1.

+ -

Load

Wiring of 4–20 mA DC output

Figure 26. Wiring diagram: 4–20 mA DC output

H 1

G 2

E 3

100-240 V AC

See [1] of Table 1.

Figure 20. Wiring diagram: Power supply

R S

14 11

15 12

16 13

See [2] of Table 1.

R: return

S: supply

Model TY7840

A

B

C

Figure 21. Wiring diagram: Temperature sensor input

Wiring to temperature sensor*2, *3

7

8

See [3] of Table 1.

MagneW 3000

+ -

Figure 22. Wiring diagram:Flow meter input

Wiring to flow meter*3

9

10

OFF/ON Heating/Cooling

See [4] of Table 1.

Relay

Heating/cooling changeover

Figure 23. Wiring diagram: Heating/cooling changeover input

Wiring to counter (Dry type pulse output for total energy and total flow)

+V

0 V

E F

21/23 24

22 25

E: totalized energy

F: totalized flow

Figure 25. Wiring diagram: Counter output (dry type)

See [6] of Table 1. Counter

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1 2 3 1 2 3

HGE

External terminals

Good wiring

1 2 3 1 2

H G E

External terminals

Bad wiring

NC-bus wiring RS-485 wiring

Note: *1 Since varistor is provided to power supply wiring, the power supply wiring cannot be daisy-chained between two calculation units. See the

below figure.

Figure 29. Correct and incorrect power supply wiring *2 For equal wiring resistance, even out the wiring length of the cables for supply and return water temperature inputs. *3 Although shielded cables are used for pulse input, RTD input, and 4-20 mA DC output, shielding terminal is not provided on the calculation

unit. Additionally provide a ground terminal block (with 100 Ω or lower ground resistance). See the below figure.

Figure 30. Ground terminal block for pulse input, RTD input, and 4-20 mA output

30

31

See [8] of Table 1.

NC-bus

IN+ IN- S

OUT+ OUT-

External terminal block

Two terminals are provided for NC-bus wiring. Use an external terminal block to branch the NC-bus line.

Figure 27. Wiring diagram: NC-bus

32

33

34

Slave device See [9] of Table 1.

Master device

DA

DB

SG

Figure 28. Wiring diagram: RS-485

E E E

～

H G EExternal terminal block

Pulse input + -

4-20 mA DC output

+ -

RTD input x2

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Seal of the Parameter Setting

The sticker for sealing the parameter setting is attached to the parameter switch on the right side surface of the calculation unit. This indicates that the parameter setting is complete by a serviceperson. Do not remove the sticker.

Figure 31. Sealing the parameter setting

Application Examples

Seal.

Parameter setting switch

Sticker for sealingthe parameter setting

Separate heat management ofbuilding tenants

Calculation units

RTD

S head R headRTD

FMFM

RTD

RTD

Chiller plant

FM: flowmeter R head: return header S head: supply header

Figure 33. Application example:for building tenants

Combination of pressure and flow controls

Calculation unit Pressure controller/ Flow controller

Flowmeter RTD

RTD Control valve

Pressure transmitter

Figure 34. Application example: for pressure and flow controls

Chiller plant Load

Heat management of DHC substation DHC: District Heating and Cooling

Calculation unit

RTD

RTD Flowmeter

Figure 32. Application example:for DHC substation

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Maintenance

Service parts

Item Part number Description

Lithium battery with connector 83170640-001 1 piece/set 83170640-005 5 pieces/set 83170640-010 10 pieces/set

LCD module 83167012-001 1 LCD module 1 plastic setscrew 1 instruction sheet

Lithium battery replacement

Periodically replace the lithium battery for data backup.

CAUTION

When replacing the battery, read the instructions hereinafter and correctly attach the new battery to the product. - Use our specified battery. - Place the new battery with the positive and negative terminals (+, -) on the correct sides. Failure to do so might cause overheating, burst, or leakage of the battery.

Dispose of the used battery in accordance with your local regulations. Do not through it in fire or in general garbage. Doing so might cause burst or ignition.

IMPORTANT:

Only authorized serviceperson is allowed to replace the battery.

Do not touch the power supply unit when replaceing the battery.

Replace the lithium battery every 5 years if the product is always in use (in ON state).

Remaining battery life cannot be checked by measuring the terminal voltage. Be sure to replace the battery every 5 years.

Replace the lithium battery with the power ON.

If the product has never or hardly been operated (in OFF state) for a year, replace the lithium battery before the product operation.

Use the specified (shown below) battery.

1) Remove the sticker that covers the battery slot on the terminal cover.

Figure 35. Removing the sticker

2) Remove the battery from the slot and disconnect the connector.

Figure 36. Removing the battery

Remove.

Sticker(attached to

the battery slot)

Remove.

Disconnect.

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3) Connect the connector of the new battery and insert the battery into the slot.

Figure 37. Connecting the new battery

4) Attach the sticker to the battery slot on the terminal cover so that the whole battery slot is covered with the sticker.

Figure 38. Layout of the sticker

5) Fill in the date for next replacement (5 years after the replacement) on the label attached to the side surface using an oil-based pen.

Follow the steps 3) to 5) when installing the energy meter.

LCD module replacement

WARNING


IMPORTANT:

Only authorized serviceperson is allowed to replace the LCD module.

Do not touch the power supply unit when replaceing the LCD module.

The setscrew of the LCD module is plastic to prevent static. Follow the below instructions. - Do not lose the setscrew. Any other screw is not acceptable. - Do not excessively tighten the setscrew so as not to damage. - Do not use a metallic screw as the setscrew.

Be sure to periodically discharge static electricity charged in your body by touching a grounded metal part before and during handling the LCD module.

Transparent LCD cover is very thin. Carefully handle the face cover so as not to injure yourself.

Tools required:

- Slotted screwdriver - #0 Phillips screwdriver

Insert.

Connect.

Terminal cover

Sticker

Battery slot

Margin for removing the sticker

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Instructions before replacement:

1) Check that the operation of the calculation unit is being normal without any error indication on the display and failure.

2) Save the calculation data. Note that the items 4 to 6 may not be included (depending on the models). 1. Total energy for cooling: indicated by TOTAL ENG(C) 2. Total energy for heating: indicated by TOTAL ENG(H) 3. Total flow: indicated by TOTAL FLW 4. Maximum energy demand value: indicated by MAX DMND 5. Total time of energy demand 1 exceeding the setpoint: indicated by OVRTM DMND1 6. Total time of energy demand 2 exceeding the setpoint: indicated by OVRTM DMND2

3) Check that the date for use of the battery has not expired yet. (See the battery replacement date.) If it has expired, replace the battery.

IMPORTANT:

Data is stored in the RAM, which is backed up by the lithium battery, even when the power shuts down. If the power shuts down with the dead lithium battery, the data that has been stored in the RAM since 10:15 of the previous day will be lost.

4) Press and hold [enter] key to write the stored data into the CF card. (If the CF card is not applicable to your calculation unit,

skip this step.) "EE00" appears on the display when the data is successfully written into the CF card.

5) Turn off the power to the product by turning off the breaker, etc. because the calculation unit does not have the power switch.

Instructions of replacement:

6) Remove the face plate. Hold and press the top and bottom surface of the frame to bend the face plate outward. Insert a slotted screwdriver into the gap between the face plate and the frame, as shown in the figure below. Pull the face plate outward using the screwdriver.

Figure 39. Face plate removal

7) Remove the LCD cover. Insert the slotted screwdriver into the gap on the right side of the LCD, as shown in the figure below. Pull the LCD cover outward using the screwdriver. Hold the LCD cover with fingers and remove.

Figure 40. LCD cover removal

Face plate

Frame

Insert.

LCD cover (transparent)

Pull outward.

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8) Remove the setscrew fixed on the left lower corner of the LCD module.

Figure 41. Setscrew of the LCD module

9) Carefully remove the upper part of the LCD module. The connector of the LCD module is connected to the LCD board.

10) Disconnect the connector of the LCD module from the LCD board to completely remove the LCD module.

Figure 42. LCD module removal Figure 43. Connector removal

11) Follow the below steps to mount the new LCD module onto the LCD board. (1) Connect the connector of the LCD module to the LCD board. (2) Fit the upper right corner of the LCD module inside the upper right tab of the frame. (3) Insert the setscrew into the hole on the lower left corner of the LCD module. (4) Engage the mounting boss of the LCD module with the pin on the lower right corner of the LCD board.

Figure 44. Mounting the LCD module 12) Position the LCD module onto the LCD board and tighten the setscrew.

IMPORTANT:

Tightening torque of the setscrew is 0.07 N·m. Larger tightening torque may break the setscrew. Carefully tighten the screw.

13) Attach the LCD cover.

Position the LCD cover so that the larger side surface is inserted to the right side.

Setscrew

Connector

Remove the connector.LCD module

Tab of the frame Setscrew

Insert.

Pin of the LCD board

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14) Attach the face plate to the frame. Push the front surface of the face plate until the face plate fits inside the tabs located on the four corners of the frame.

Figure 45. Tabs on the four corners of the frame

Check that the four corners of the face plate are held by the tabs of the frame. Instructions after replacement:

15) Supply the power to the calculation unit.

16) Check that the calculation unit successfully starts up and characters appear on the display. Check no abnormal startup operation or error codes on the display.

17) Check the data stored in the calculation unit. Check that the data shown on the replaced display is the same as on the display before replacement.

Tabs on the corners of the frame

Tabs on the corners of the frame

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Blank page added for page editing purposes

AB-6559

Infilex, MagneW, and savic-net are trademarks of Azbil Corporation in Japan or in other countries.

Specifications are subject to change without notice.

Building Systems Company

http://www.azbil.com/

Rev. 0.0 Apr. 2015 AB-6559

(J: AI-6559 Rev. 9.0)

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