Miura EJ-210 User manual

i
INSTALLATION
MANUAL
Boiler Operation Terminal
EJ-210
This document was formulated in Japan.
Comply with the regulations and
standards of the country of use regarding
installation and usage.
The specifications of products and
components may vary with country of
use and the site situation.
Contact your dealer or MIURA sales
office for further inquiry regarding this
document.
INFORMATION IN THIS MANUAL MAY
BE CHANGED WITHOUT NOTICE.
Manual Code No.
E20-018-00
BP – TERMINAL

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Introduction
This Installation Manual describes the carry-in and installation of the boiler operation terminal EJ-
210(hereinafter called “EJ-210”).
When installing the EJ-210, carefully read and understand the contents of this manual to ensure
that all installation work is performed safely. Warnings in this manual are classified as DANGER,
WARNING, CAUTION, or NOTE, in order of severity.
Indicates an imminently dangerous situation which leads to
serious injury or death to the user, if the product is mishandled.
Indicates a situation which might cause serious injury or death
to the user, if the product is mishandled.
Indicates a situation which might cause minor injury to the user
or the occurrence of physical damage only, if the product is
mishandled.
Describes the precautions to prevent failures of the EJ-210,
points to perform effective operation, and useful information to
know.
DANGER
WARNING
CAUTION
NOTE

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Table of Contents
1. PRECAUTIONS DURING INSTALLATION.......................................... 1
2. OVERALL DIMENSIONS..................................................................... 2
2.1. EJ-210 Main Unit................................................................................................ 2
2.2. Steam Pressure Sensor (Optional)..................................................................... 3
3. COMPONENT NAMES ........................................................................4
3.1. Names of Indicators and Buttons ....................................................................... 4
3.2. Layout and Names of Internal Circuit Boards ..................................................... 4
4. REQUIRED PARTS.............................................................................. 5
5. INSTALLATION.................................................................................... 6
5.1. Precautions when Installing the Main Unit.......................................................... 6
5.2. Installing EJ-210................................................................................................. 7
5.2.1. Top of Control Box .................................................................................................7
5.2.2. Boiler Allowing Installation inside the Control Box ..................................................8
5.3. Installing RS-422 Communications Equipment .................................................. 8
5.4. Precautions when Installing the Steam Pressure Sensor................................... 9
6. WIRING.............................................................................................. 10
6.1. Precautions ...................................................................................................... 10
6.2. Wiring Procedures............................................................................................ 10
6.3. Terminal Arrangement on Control Circuit Board ................................................11
6.4. Wires for Use.....................................................................................................11
6.5. Signal Wires ..................................................................................................... 12
6.5.1. AC Input Signal ....................................................................................................12
6.5.2. Output Signal .......................................................................................................12
6.6. RS-422 Communication Line Wiring ................................................................ 13
6.7. M-NET3 Communication Line Wiring ............................................................... 14
6.8. Steam Pressure Sensor Wiring ........................................................................ 15
6.9. Standard Connection Diagrams ....................................................................... 16
7. EXAMPLES OF WIRING ................................................................... 17
7.1. Boiler with BL-model Controller Mounted ......................................................... 17
7.2. Boiler with XJ1-model Controller Mounted ....................................................... 18

Document No.: E20-018-00
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Definition of Terms
The table below describes the terms used in this manual.
The following names are defined in various standards. They are indicated with an asterisk (*) in the text.
Term
Description
AWM2840
Shielded wire defined in “UL Style No. 2840”
CV wire
Power cable defined in “JIS C 3605”
FCPEV
Twisted pair cable for communication defined in “JCS 5402”
HIV wire
Insulated wire defined in “JIS C 3317”
IV wire
Insulated wire defined in “JIS C 3307”

Document No.: E20-018-00
1
1. PRECAUTIONS DURING INSTALLATION
Pay attention to the following items during equipment installation and instrumentation work.
(1) When performing grounding work, use IV wire(*) or equivalent from the ground terminal in the
panel. Use a wire diameter equal to or larger than the main power wire (2.0 mm2 or larger).
(2) Do not install an overcurrent protection circuit breaker in the grounding wire.
(3) Connect the power supply wiring from the boiler power supply. Ensure that an earth leakage
circuit breaker (with overcurrent protection) is installed in the boiler power-supply line.
(4) If the power supply wiring is not connected from the boiler power supply, ensure that a dedicated
earth leakage circuit breaker (with overcurrent protection) is installed.
(5) Use a wire with 0.1 MΩ or higher insulation resistance.
(6) Use a wire with 2.0 mm2 or larger diameter.
(7) Do not extend the steam pressure sensor cable.
(8) Ensure that the distance between HUB and the equipment is within 100 m.

Document No.: E20-018-00
2
400
23
5011535
350
195
23
43
74
153
284
φ30 φ10
φ30
φ20
57
52.5290.5
Data Blow
Normal
Caution B P –T E R M I N A L
Rubber feet
4-M6 (welded nut)
(For installation)
(M-NET3 communication
line wire inlet)
(Steam pressure sensor
wire inlet)
(Power supply/signal
wire inlet)
2. OVERALL DIMENSIONS
2.1.EJ-210 Main Unit
Item
Unit
Specification
Power supply
—
120 VAC, 50/60 Hz, single-phase
Electrical consumption
VA
11 (max.)
Product mass
(Product weight)
kg
3.3
Painting color
—
Light silver (MIURA specified color)

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2.2.Steam Pressure Sensor (Optional)
Individual specifications
Model
YSK-AC10M-333
YSK-AC20M-334
YSK-AC30M-333
Pressure range
0–0.98 MPa
0–1.96 MPa
0–2.94 MPa
Common specifications
Power supply voltage
10.5–28 VDC
Storage temperature
range
-20–80°C
Connection
R1/4
Moisture and water
resistance
JIS D0203 S2
Output
1–5 VDC
Overall accuracy
(at 1013 hPa)
±3%FS (-20–70°C)
±4%FS (70–80°C)
±5%FS (80–90°C)
Gray: Shield
Black: Power supply ground
White: Voltage output
Red: Power supply positive (+)
Power supply positive (+)
Voltage output
Power supply ground
Contact pin No.
Waterproof connector
for relay connection
52117-0340 (white)
(Manufactured by
Molex Japan Co., Ltd.)
Model name plate
Cap (SUS304)
Joint (C3604)
Plastic cap

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I/O board
RS-422
communication
conversion circuit
board EC11
CPU board
OPR board
Switching power
supply
Indicators and buttons
3. COMPONENT NAMES
3.1.Names of Indicators and Buttons
3.2.Layout and Names of Internal Circuit Boards
Data Blow
Normal
Caution BP –TERMINAL
Display
“Data” button
“Blow” button
Status lamps
▲/▼ buttons

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4. REQUIRED PARTS
During installation of the EJ-210, different parts are required according to the boiler installed. Be sure
to check the following points before starting installation.
(1) Boiler with BL-model or XJ1-model controller mounted
For a boiler that has a BL-model or XJ1-model controller, communication occurs between the EJ-
210 and the boiler. The RS-422 communication conversion circuit board EC11 has to be installed
on the CPU board on the boiler side.
(2) Boiler allowing installation inside the control box
If a boiler allows the MI terminal MT1-200 to be installed inside the control box, the EJ-210 can
be installed in the same way. A setting plate and panel name plate are required for installation.
(3) Boiler without BL-model or XJ1-model controller
For a boiler that does not have a BL-model or XJ1-model controller, installation is possible using
the EJ-210 and AC input and output wiring only.

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5. INSTALLATION
5.1.Precautions when Installing the Main Unit
•Install the EJ-210 in a location within the operation environment range (temperature and
humidity).
•Do not install the EJ-210 in a location below. This may result in equipment failure.
(1) Location subject to direct sunlight or near equipment that generates heat
(2) Hot location or location subject to severe temperature fluctuations
(3) Location with high levels of dust or humidity
(4) Location subject to shocks or vibrations
(5) Location with a chemical atmosphere or where equipment may contact chemicals, or
location subject to water splashing
(6) Location close to power transmission lines or near equipment that generates strong
magnetic fields
(7) Location subject to severe power supply voltage fluctuations
•Firmly secure the EJ-210 in a vibration-free position.
•Do not install the EJ-210 in a location subject to water, such as steam or condensation. Check
that condensation along steam piping cannot fall on the main unit of the EJ-210.
•During installation, do not touch circuit boards inside the main unit with bare hands. Take care
that no dirt or metal particles can enter the main unit of the EJ-210.
•When connecting the optional steam pressure sensor, install the EJ-210 in a location where the
wiring between the EJ-210 and steam pressure sensor does not exceed 2 m.
•The EJ-210 is designed for indoor installation only. To install it outdoors, take appropriate
waterproofing, dustproofing, and antifreezing measures, and avoid locations subject to direct
sunlight.
NOTE
The EJ-210 has the same installation dimensions as the MI terminal MT1-
200. If MT1-200 was connected to the boiler, the EJ-210 can be installed in
the same location.
CAUTION
Do not directly weld the EJ-210 to a column or wall. Arcs from welding, etc.
may damage internal electronic components.
CAUTION
Check the points below to confirm that the installation location meets the
required conditions. Installation in an inappropriate location may result in
equipment failure.