energy meter: calculation unit · if the flow meter is installed onto the supply water pipe, the...
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AB-6559
1
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)
AB-6559
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 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.
AB-6559
3
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.
AB-6559
4
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
AB-6559
5
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
AB-6559
6
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)
AB-6559
7
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
AB-6559
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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.
AB-6559
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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
AB-6559
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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
AB-6559
11
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
AB-6559
13
Installation
WARNING
Before wiring and maintenance, be sure to turn off the power to the product. Failure to do so might cause electric shock.
CAUTION
Do not allow wire scraps, chips, and other refuses to enter into the product. Doing so might cause fire or product damage.
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.
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
AB-6559
14
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
17 AO1+ 4-20 mA output
32
8 FLOW- 18 AO1- 33
9 DI+ Cooling/heating change input
19 AO2+ 4-20 mA output
34
10 DI- 20 AO2-
Model WTY8000A12_1 (with NC-bus 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 NC-bus+ NC-bus communication6 DO- 16 TR - B 31 NC-bus-
7 FLOW+ Flow input from MagneW3000
17 AO1+ 4-20 mA output
32
8 FLOW- 18 AO1- 33
9 DI+ Cooling/heating change input
19 AO2+ 4-20 mA output
34
10 DI- 20 AO2-
Model WTY8000A12_2 (with RS-485 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 NC-bus+
6 DO- 16 TR - B 31 NC-bus-
7 FLOW+ Flow input from MagneW3000
17 AO1+ 4-20 mA output
32 DA RS-485
communication8 FLOW- 18 AO1- 33 DB
9 DI+ Cooling/heating change input
19 AO2+ 4-20 mA output
34 SG
10 DI- 20 AO2-
AB-6559
16
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.
Before wiring and maintenance, be sure to turn off the power to the product. 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.
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.
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
Before wiring and maintenance, be sure to turn off the power to the product. Failure to do so might cause electric shock.
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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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)
28
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