TLV SteamAqua SQ10 User manual

172-65627M-09 (SQ10) 18 October 2021
Steam-Fired Instantaneous Water Heater
Compliant with the Water Supply Act (in Japan)
SQ10
Copyright © 2021 by TLV CO., LTD.
All rights reserved

172-65627M-09 (SQ10) 18 Oct 2021
1
Introduction
Thank you for purchasing the TLV steam-fired instantaneous water heater,
SteamAqua (hereafter referred to as "the unit").
The unit has been thoroughly inspected before being shipped from the factory.
When the unit is delivered, before doing anything else, check the specifications and
external appearance to make sure nothing is out of the ordinary. Also be sure to
read this manual carefully before use and follow the instructions to be sure of using
the unit properly.
The unit has been certified by JET (Japan Electrical Safety & Environment
Technology Laboratories) as a water supply instrument based on the Water Supply
Act (in Japan).
If detailed instructions for special order specifications or options not contained in
this manual are required, please contact TLV for full details.
Be sure to read the "Installation/Commissioning" chapter of this manual before
installation. After reading and understanding its contents, correctly install the unit.
This manual should also be referred to for commissioning, and for daily operation,
maintenance inspection, and when troubleshooting.
This instruction manual is intended for use with the model(s) listed on the front
cover. It is necessary not only for installation but for subsequent maintenance and
troubleshooting. Please keep it in a safe place for future reference.
The copyright of this manual belongs to TLV CO., LTD. Unauthorized reproduction
of the contents of this manual in part or in whole is strictly prohibited.
This manual should be kept for future reference. If it becomes defaced or is
misplaced, contact your local TLV representative, or download from the TLV
website (https://www.tlv.com).
The contents of this manual are subject to change without notice.
Please note that visuals such as the diagrams and illustrations found within this
manual may differ slightly from the actual unit.
This manual was written for the purpose of use of the unit in the Japanese market.
Please carefully read all other documentation included for this unit and its
components.
Make sure that the person supervising operation of the unit has received a
thorough briefing on the contents of the 'Report on Commissioning Results' which
is issued after finishing the commissioning.
Important Notice

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Contents
Introduction........................................................................................... 1
Operation ....................................................................... 3
Safety Considerations.......................................................................... 4
Temperature Stability ........................................................................... 8
Configuration (Component Name and Function) ................................. 9
Optional Equipment Configuration ..................................................... 11
Control Panel Configuration............................................................... 12
Touch Panel Display .......................................................................... 13
Safety Function (Abnormal Temperature Rise Preventing Function). 24
Operation Flow................................................................................... 25
Operation Procedure.......................................................................... 26
Prevention of Damage due to Freezing ............................................. 30
Maintenance and Inspection .............................................................. 31
Storage............................................................................................... 34
Storage Instructions ........................................................................... 34
Troubleshooting.................................................................................. 35
Service or Technical Assistance ........................................................ 37
Specifications ..................................................................................... 38
Disposal of the Unit ............................................................................ 38
TLV EXPRESS LIMITED WARRANTY.............................................. 39
Service ............................................................................................... 41
Installation/Commissioning ....................................... 42
Introduction......................................................................................... 43
Safety Considerations........................................................................ 43
Precautions for Opening and Moving the Package............................ 49
Precautions before Unit and Piping Installation ................................. 51
Piping Work........................................................................................ 53
Installing Several SteamAqua Units in Parallel.................................. 58
Electrical Wiring.................................................................................. 59
Commissioning Procedure ................................................................. 64
TLV EXPRESS LIMITED WARRANTY.............................................. 71
Service ............................................................................................... 73

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Operation

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Safety Considerations
Read this section carefully before use and be sure to follow the instructions.
Installation, inspection, maintenance, repairs, disassembly, adjustment and valve
opening/closing should be carried out only by trained maintenance personnel.
The precautions listed in this manual are designed to ensure safety and prevent
equipment damage and personal injury. For situations that may occur as a result
of erroneous handling, three different types of cautionary items are used to
indicate the degree of urgency and the scale of potential damage and danger:
DANGER, WARNING and CAUTION.
The three types of cautionary items above are very important for safety: be sure
to observe all of them as they relate to installation, use, maintenance, and repair.
Furthermore, TLV accepts no responsibility for any accidents or damage
occurring as a result of failure to observe these precautions.
There is a space under the control panel of the unit for storage of this manual.
Symbols
Indicates a DANGER, WARNING and CAUTION item.
Indicates an urgent situation which poses a threat of death or
serious injury
Indicates that there is a potential threat of death or serious
injury
Indicates that there is a possibility of injury or equipment/
product damage
Be sure to follow the instructions, as each contains important information regarding
safety.
To use the unit correctly and safely, be sure to follow the safety considerations
written in this manual when checking the unit’s "Caution/Warning sticker", installing
the unit and/or wiring, starting or stopping operation, or carrying out maintenance or
repairs etc.
Furthermore, TLV CO., LTD. does not bear responsibility or guarantee the unit for
damages or accidents that arise from not following these considerations.
Checking the "Caution/Warning Stickers"
"Caution/Warning stickers"can be found on both the unit and some components.
The operator of this unit should understand what is written on the "Caution/Warning
stickers"before operating the unit.
DANGER
WARNING
CAUTION

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Precautions for the Entire Unit
Install properly and DO NOT use this unit outside the
recommended operating pressure, temperature and other
specification ranges.
Improper use may result in such hazards as damage to the unit
or malfunctions that may lead to serious accidents.
Local regulations may restrict the use of the unit to below the
conditions quoted.
When the unit is directly connected to municipal water
supply piping, back flow prevention measures must be
taken in accordance with the Water Supply Act (in Japan).
Failure to do so may lead to serious accidents in the water main line.
Use hoisting equipment for heavy objects (weighing
approximately 20 kg or more).
Failure to do so may result in back strain or other injury if the
object should fall.
Take measures to prevent people from coming into direct
contact with the condensate outlet of the unit.
Failure to do so may result in burns or other injury from the
discharge of fluids.
When disassembling or removing the unit and its
components, wait until the internal pressure equals
atmospheric pressure and the surface of the components
have cooled to room temperature.
Disassembling or removing components when hot or under
pressure may lead to discharge of fluids, causing burns, other
injuries or damage.
Be sure to use only the recommended components when
repairing the unit, and NEVER attempt to modify the unit in
any way.
Failure to observe these precautions may result in damage to the
unit and burns or other injury due to malfunction or the discharge
of fluids.
Do not use excessive force when connecting threaded pipes
to the unit.
Over-tightening may cause breakage leading to fluid discharge,
which may cause burns or other injury.
Use only under conditions in which no freeze-up will occur.
Freezing may damage the unit, leading to fluid discharge, which
may cause burns or other injury.
Use only under conditions in which no water hammer will
occur.
The impact of water hammer may damage the unit, leading to
fluid discharge, which may cause burns or other injury.
Make sure the power supply is OFF before carrying out
work on the wiring or inspections involving disassembly.
If such work is carried out with the power on, there is a danger
that components may malfunction or electric shock may occur,
leading to injury or other accidents.
Make sure that wiring work requiring a special license is
carried out by qualified personnel.
If carried out by unqualified personnel, overheating or short
circuits leading to injury, fires, damage or other accidents may
occur.
CAUTION

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Precautions for Operation
When initially starting up the unit, make sure to check the
display the measured temperature to prevent burns and do
not touch the water until the temperature becomes stable.
Be careful especially when using the water is used at high
temperature.
Failure to observe these precautions is dangerous, as there is a
possibility that residual water in the pipe line, which is hotter than
the set temperature, may flow.
The unit should be operated in accordance with the proper
operating steps, within the specifications of the unit, such
as the maximum operating pressure (PMO) and maximum
operating temperature (TMO). Refrain from sudden
operation of any valves.
Failure to observe these precautions is dangerous and may result
in damage to the unit, malfunctions or failure of the unit, or lead to
serious accidents.
Do not intentionally allow the control panel to become wet.
Operation of the unit while the control panel is wet may result in
electric shock and/or malfunction of the unit.
The tank must be full of water before operating the heat
exchanger. In particular, if water has been discharged from
inside the heat exchanger for freeze prevention etc., make sure
to restart the unit after supplying water to the heat exchanger.
(When the cooling circulation unit (optional) is installed.)
Operating the heat exchanger empty of water for a long period of
time is dangerous, and may result in the pump running dry and
becoming damaged. .
Do not rapidly reduce the valve opening on the hot water line.
If it is reduced rapidly, do not touch the water for 30 seconds.
Failure to observe this precaution is dangerous, as there is a
possibility that water at a temperature higher than the set
temperature may temporarily flow.
Do not change the temperature settings without contacting the
water user when washing hands, using a shower or cleaning.
Failure to do so may result in burns to the water user.
Each component of the unit such as the steam piping,
motorized valve, control valve, etc. may become hot. Do not
touch components with bare hands.
Failure to observe these precautions may result in burns.
In the event of an earthquake, close the main steam supply
valve and shut down the unit promptly, then turn off the
breaker.
If the tube inside the heat exchanger of this unit is damaged due
to an earthquake, a large amount of steam will enter the hot
water piping, which may result in burns.
Valve and unit operation must be carried out by personnel
who have attended operation training ensuring the use of
heat-resistant gloves, helmet, protective glasses, etc. to
prevent burns.
Failure to do so may result in burns, as the piping and cover of
the unit become hot during operation.
Continued on the next page
CAUTION

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When finishing operation, the operation should be stopped
in accordance with the proper steps.
Incorrect operation of the unit during use for handwashing or
showering, or cleaning, etc., may result in burns due to
malfunction, which causes the temperature of the water to rise
above the set temperature.
When draining water from the unit, make sure to wait until
the unit has cooled down.
If carrying out work after hot water use, there is a risk of burns, as
the components and the water inside the unit are hot.
Precautions when the Unit is Shut Down for a Long Period of Time
When the unit is shut down for a long period of time or there
is a possibility of freezing, make sure to completely
discharge steam condensate or water in the unit and its
components such as the steam piping, heat exchanger, etc.
After doing so, there is a risk of burns or injury during operation
start-up, as fluid may be discharged from piping.
Precautions when Maintenance or Inspection is Conducted
Be sure to use only the recommended components when
repairing the unit and its components, and NEVER attempt
to modify the unit in any way.
Failure to observe these precautions may result in damage to
the unit or burns or other injury due to malfunction or the
discharge of fluids.
Do not climb on the components of the unit. The unit is not
designed to be climbed on by people.
Failure to observe this precaution may lead to injury, failure or
abnormal operation due to deformation of the unit.
When disassembling or removing the unit and its
components, wait until the internal pressure equals
atmospheric pressure and the surface of the components
have cooled to room temperature.
Disassembling or removing components when hot or under
pressure may lead to discharge of fluids, causing burns, other
injuries or damage.
Do not disassemble, repair or modify the control panel by
yourself.
Failure to observe these precautions may result in burns, etc.
due to malfunction.
Make sure that the unit is used at a power supply specification
matching the unit specifications. In particular, ensure that the
power supply specification matches when moving the unit.
Failure to do so may result in damage to the unit.
Make sure to wear protective gear such as a helmet, safety
glasses, long-sleeve shirt, heat-resistant gloves, protective
footwear, etc.
Failure to do so may result in burns or injuries.
In case of an abnormality, install a safety fence or restrict
access to the room with a sign stating "Authorized
personnel only." etc. to prevent personnel unauthorized for
the unit (including those who have not received the relevant
safety education) touching the components. When doing so,
stop the supply of steam, electrical power, water and air.
Failure to prevent the access of unauthorized personnel may
result in burns, electric shock, injury, or falls.
CAUTION
CAUTION
CAUTION

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Temperature Stability
The unit is capable of supplying water with a temperature deviation of 1 C of the
set temperature when there is little fluctuation in the amount of water and the unit is
in stable operation. However, rapid operation of the valve for water supply, or rapid
temperature changes of the supply water, may temporarily result in a temperature
deviation greater than 1 C of the set temperature.
The valve for water supply system should be adjusted as slowly as possible.
For reference, the table below gives examples of possible water temperature
deviations, at a set temperature of 60 C and 0.3 MPaG steam pressure, according
to the relative change of water flow rate and valve operation time.
Example 1 below shows that when reducing the flow rate of the supply water from
2 m3/h to 1 m3/h (relative change of 50%), even operating the water supply valve
for 30 seconds will result in a temporary water temperature deviation of 3 °C.
Example 4 shows that when reducing the flow rate of the water supply from 16
m3/h to 15 m3/h (relative change of 6%), even rapid operation of the water supply
valve will result in a temporary water temperature variation of only 1 °C.
As the water temperature deviation increases with the relative change of water flow
rate and reciprocal to valve operation time, operate the valve over a period equal to
or longer than the corresponding valve operation time in order to keep the water
temperature deviation equal to or lower than the value shown in the table below.
No.
Water Flow Rate
Change
(m3/h)
Relative Change of
Water Flow Rate
(%)
Valve Operation
Time
(seconds)
Water Temperature
Deviation
(C)
1
2 →1
50
30
3
2
4 →3
25
3
3
3
8 →7
12.5
0.5
1.5
4
16 →15
6
0.3
1

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Configuration (Component Name and Function)
Left
Right
Back
10
11
6
9
20
14
13
1
12
19
Water Quality
Certification (Japan) High Temperature
Caution Label Hot Water
Outlet
Steam Inlet
Cold Water
Inlet
Nameplate
Condensate
Outlet
Hot Water
Outlet
Cold Water
Inlet
Condensate Outlet
Steam
Inlet
Condensate Blowdown 5
7
912 11
20
8
6
14
18
19
1
17
13
215
3
4
10
16

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Component Configuration
Name
No.
Component
Description
Condensate
Discharge
Unit
1
PowerTrap
Removes steam condensate
consumed by the heat exchanger
to produce hot water.
・The PowerTrap has both a steam
trap function, and a pump function
for discharging condensate even
when there is very little pressure
from the heat exchanger side.
・The silencing bush reduces the
sound of water hammer generated
by flash steam and cold condensate
in contact.
2
Silencing Bush
3, 4
Check Valve
5
Condensate Blowdown
Valve
Heat Exchanger
Unit
6
Heat Exchanger
Produces hot water by exchanging
heat from steam supplied by the
steam supply unit to water.
・The flow sensor stops supplying
steam when the water flow rate
becomes equal to or lower than the
controllable flow rate.
7
Flow Sensor
8
Temperature Sensor
Steam Supply
Unit
9
Steam Inlet Valve
Supplies the required amount of
dry steam for the water
temperature to become the set
temperature.
・The control valve is pneumatically
actuated.
・Condensate separator separates
and removes condensate in the
steam piping.
・When the unit stops or becomes
abnormally high temperature, the
motorized valve shuts out steam,
preventing steam flowing into the
heat exchanger.
10
Condensate Separator
11
Control Valve
12
Motorized Valve
Receiver Unit
13
Condensate Receiver
Stores steam condensate
temporarily while the PowerTrap
discharges condensate.
・The air vent for steam removes air
in the steam piping during initial
operation.
14
Air Vent for Steam
15
Check Valve
PowerTrap
Motive Steam
Supply Unit
16
Check Valve
Supplies motive steam to the
PowerTrap for the pump
operation.
・Steam trap (17) discharges
condensate in the supply pipe.
Discharged condensate flows into the
condensate receiver (13).
・Pressure gauge (19) indicates the
source pressure of the steam.
17
Steam Trap
18
Strainer
19
Pressure Gauge
Control Panel
20
Control Panel
Starts/stops operation and allows
unit setting changes.
・Display of currently flowing hot water
temperature and set temperature.
・Adjust set temperature.
・Sets/cancels each alarm.

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Optional Equipment Configuration
Optional Equipment
Option
No.
Component
Description
Stainless Steel
3-sided Cover/
Stainless Steel
Frame Unit
1
3-sided Cover
(Front, Left, Right)
The panel and frame (including
base) material of the unit can be
changed from iron to stainless
steel.
2
Base & Frame Unit
Back Cover
3
Upper Back Cover
Can be installed at the back of
the unit.
・The cover is divided into upper
and lower parts.
・The material for the back cover is
SUS304 stainless steel regardless
of the frame material.
4
Lower Back Cover
Control Panel for
Connection to
Circulating Pump
5
Control Panel for
Connection to
Circulating Pump
A control panel can be installed
for connecting the unit start-up to
a low-power pump on a closed
(hot) water circulation system.
・Supply/control of motive power for
100 V AC single-phase pumps of
0.4 kW or less.
・Pump not included in this option.
Cooling Circulation
Unit
6
Circulating Pump
Additional safety function.
・To prevent the water temperature
exceeding the set temperature,
water from the heat exchanger is
circulated to prevent further
temperature rise.
7
Solenoid Valve
Power Supply
Voltage

Control Panel,
Motorized Valve
Sets the power supply to the unit
to 200 V. (Standard: 100 V AC)
・The frequency is 50/60 Hz.
External view of the
standard product 7
6
1
2
3
45

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Control Panel Configuration
Front cover of the control panel
The front cover of the control panel is
configured as shown in Figure A.
Since the electrical components are
mounted behind the front cover inside
the panel, it must not be opened by
anyone other than a qualified electrician.
Figure B shows the internal configuration
of the control panel. When a qualified
electrician checks wiring or works on the
control panel, ensure the main power is
switched off and confirm that the power indicator (No. 3) is off.
(The layout of each component inside the control panel, as shown in Figure B, may
differ from the layout in actual units.)
No.
Name
Description
1
Touch Panel
Display
All parameters, such as starting/stopping unit operation
and changing the set temperature, can be confirmed and
set via the display.
・All basic operations are performed using this touch panel
display.
2
Earth Leakage
Circuit Breaker
(Non-fuse Breaker)
Circuit breaker for the unit.
・The circuit breaker is OFF when shipped. Make sure the breaker
is turned ON by a qualified electrician or TLV personnel.
3
Power Supply
Indicator
(White)
Lights up when power is supplied to the control panel at
100 V AC.
・Lit while power is supplied, whether in operation or not.
4
Operation Lamp
(Green)
Lights up when the operation button for the unit is switched
ON.
・Automatic operation (water flow sensing, opening/closing of the
steam valve, steam control, etc.) is performed while the
operation lamp is lit.
5
Temperature
Abnormal Alarm
(Red)
Lights up when low temperature alarm or high temperature
alarm is triggered.
・Refer to the "Alarm Log Screen" section for details.
・The unit still operates automatically when low temperature
alarm is triggered. The unit will stop operates automatically and
switches to standby mode (refer to the "Alarm Log Screen"
section for details) when high temperature alarm is triggered.
・The lamp turns off once the unit is recovered from
abnormalities.

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Touch Panel Display
Items used during normal operation
The following items can be operated with
the touch panel display to;
1. Starting operation of the unit,
2. Stopping operation of the unit, or
3. Adjusting the set (target) temperature.
The three buttons shown in the figure to
the right are used during normal operation.
No.
Name
Description
1
Operation Display
and START Button
Starts automatic operation (automatic temperature
adjustment) or ready to start automatic operation.
・The button is activated by touching it for 0.5 seconds.
・: In operation (blue), : Not in operation (gray)
2
Operation Display
and STOP Button
Stops automatic operation, also for emergency use.
・The button is enabled by touching it for 0.5 seconds.
・: In operation (gray), : Not in operation (red)
3
SET TEMP Display
and SET TEMP
Adjustment Button
Displays the current set (target) value for the water
temperature. Set temperature can be adjusted by
touching the displayed numbers.
・The set temperature can be adjusted only when adjustment
input is carried out directly via this control panel.
(However, operations such as set temperature display and
adjustment, as described in the "Installation/ Commissioning"
chapter, cannot be performed via external input/output.)
・When the set temperature can be adjusted via this control
panel, the numbers will be displayed in green. When
adjusting the set temperature via an external signal, the
numbers will be displayed in white.
Set temperature adjustment
via external signal
(Green)
Set temperature adjustment
via control panel
(White)
1 2
3

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Main Screen
5876 4
1
2
3
No.
Name
Description
1
Operating
Status
Displays the current operating status
(STOP / STARTING UP… / RUN (AUTO) / STOPPING…).
・: Operation is stopped. During this state, no
heating will be performed.
・: When the flow sensor detects water flow, the
unit switches to automatic operation.
・: The control valve opens and heating is carried
out.
・: When the internal cooling circuit is in action, after
the STOP button has been touched.
2
Set Temperature
Input Location
Displayed in green when the temperature setting value is
input via external input (4 to 20 mA).
・When the target value is input and determined via the control
panel, the text is displayed in gray.
3
OUTLET TEMP
Displays the current water temperature at the outlet of the
unit.
・The temperature is measured near the hot water outlet of the unit.
4
VALVE
OPENING
Displays the current valve opening of the control valve.
・Displayed range: 0 to 100%
(The value is not displayed unless Display Valve Opening is ON on
the parameter settings screen, as described in a later section.)
5
Current Time
Displays the current time.
・Display format: YY/MM/DD hh:mm
(The current time can be adjusted on the parameter setting
screen, as described in a later section.)
6
Alarm Log
Displays the alarm log screen.
・Alarm log (including active alarms) can be confirmed and
deleted (only alarms that have been resolved can be deleted).
(For more details, refer to the "Alarm log screen" section.)
7
Parameter
Settings
Displays the parameter setting(s) screen.
・Alarm conditions, control PID value, time, etc. can be changed
or set.
(For more details, refer to the "Alarm log screen" section.)
8
Contact
Information
Displays contact information for TLV.
・Contact information for TLV or TLV service and technical
assistance personnel and the serial no. for the unit can be
confirmed.

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Flow display on the main screen
Screen Display
Status
Description
The water flow rate is
less than the set water
amount for the flow
sensor
The amount of water flowing is
less than the set water amount for
the flow sensor (default: the
amount of water that can be
controlled under stable conditions)
・The unit is on stand-by because
there is little or no water flow.
・In this status, steam supply
(control) cannot be performed by
touching the START button.
The water flow rate is
more than (or equal to)
the set water amount
for the flow sensor
The amount of water flowing is
more than or equal to the set
water amount for the flow
sensor.
・When on stand-by, steam supply
will start after a certain period of
time.
・Once steam supply is started, the
water displayed in the image after
the heat exchanger changes to
orange.
Cooling circulation unit
is in operation
(The water flow rate is
less than the set water
amount for the flow
sensor)
There is little or no water
flowing, but the cooling
circulation unit is in operation.
・When at an abnormally high
temperature with no flow, the
water inside the heat exchanger is
cooled.
(Only displayed when the cooling
circulation unit (optional) is
installed.)
Cooling circulation unit
is in operation
(The water flow rate is
more than (or equal to)
the set water amount
for the flow sensor)
The cooling circulation unit is in
operation, and water is flowing.
・When there is a flow, and the unit
is at an abnormally high
temperature, water will flow
towards the hot water outlet and
be cooled.
(Only displayed when the cooling
circulation unit (optional) is
installed.)

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Alarm Log Screen
No.
Function
Description
1
Alarm Time
Displays the date and time (yy/mm/dd hh:mm) of an alarm.
・The displayed time is derived from the clock on the display.
2
Alarm Details
Displays alarm details.
・Low Temp Alarm：Triggered when the water temperature is
below the alarm trigger temperature (defined as: set
temperature –lower limit) for a certain period of time, and is
displayed in blue text.
It is also displayed on the main screen (A) (blue) when triggered.
・High Temp Alarm：Triggered when the water temperature
exceeds the alarm trigger temperature (defined as: set
temperature + upper limit) for a certain period of time, and is
displayed in red text.
It is also displayed on the main screen (B) (red) when triggered.
・Abnormal System Alarm 1: Triggered when any of the following
occur: an abnormality in the analog input/output circuit inside the
sequencer, an abnormality in the temperaturesensor, or if any
wires are disconnected. Displayed in amber text.
It is also displayed on the main screen (C) (amber) when triggered.
・Abnormal System Alarm 2: Triggered when there is no change in
the temperature sensor measured value for a certain period of
time during steam heating, and is displayed in amber text.
It is also displayed on the main screen (C) (amber) when triggered.
3
Alarm Recovery
Time
Displays the alarm recovery time (hh:mm).
・The time is displayed when the unit recovers from an alarm
status. (If after recovery the unit returns to an alarm status, it
will be displayed as a separate alarm.)
・If an alarm is displayed without a recovery time, then the alarm
is active.
・The displayed time is derived from the clock on the display.
4
Select Button
Enters the alarm log edit mode.
・Executable actions in the edit mode: deleting alarm log records,
displaying alarm log records that are not shown due to the
display limit for the screen (14 records).
5
Deselect Button
Exits the alarm log edit mode.
6
/(Up/Down)
Button
Scrolls up/down the alarm log display.
・When 14 or fewer alarm logs are displayed, the cursor will only
move inside the white area of the screen.
7
CLEAR Button
Deletes all alarm log records.
・Only recovered alarms will be deleted. (Active alarms will not
be deleted.)
8
(Back) Button
Returns to the main screen.
9
(Data Log
Function) Button
Displays the data log function screen.
・Trend data such as water temperature can be confirmed/recorded.
A
8
4
B
C
5
6
2
1
2
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Data Log Function Screen
Recorded hot water outlet temperature (measured value, target value) and valve
opening data can be output to an external storage device via the USB port.
Data log function screen (1) Data log function screen (2)
No.
Function
Description
1
Start/End
Recording
Starts/ends trend data recording/display
・Starts data recording/display.
(When data is not currently being recorded/displayed.)
・Stops data recording/display.
(While data is being recorded/displayed.)
2
Trend Data
Displays various trend data against elapsed time.
・Hot water outlet temperature (PV): Displays the measured
value of the hot water outlet temperature.
・Hot water outlet temperature (SV): Displays the target water
temperature.
・Valve opening (%): Displays the degree of opening of the
control valve.
・Hot water flow rate (m3/h): Displays the measured value of the
hot water flow rate.
3
Writing…
Indicates that trend data is being displayed or written.
4
Sampling Time
Sets the sampling time.
・Factory setting: 1
・Setting range: 1 to 6000 seconds
5
 (Back Button)
Returns to the alarm log screen.
6
CLEAR Button
Clears the displayed trend data.
・Doesnot clear data already written to a USB device.
1
2
3
4
5 6 7
8
9
2

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Trend data output (data log function)
(1) Preparing for data transfer (recording)
For trend data output, prepare a USB device.
(USB device not included with the unit.)
a) Open the front cover of the control panel.
(Control panel for outdoor specifications:
the inner cover of the control panel should
be opened.)
For safe use, make sure the breaker is
switched OFF when removing/inserting the
USB device.
b) Insert the USB device into the USB port on
the touch panel display inside the control
panel.
c) Once the USB device is inserted, switch
the breaker ON and close the front cover of
the control panel. (Control panel for
outdoor specifications: the inner cover of
the control panel should be closed.)
When the USB device is recognized by the unit, the USB icon will be
displayed in the lower right of the touch panel display.
(2) Data transfer (recording)
When the "Start/End Recording" button on the
data log function screen is touched, the data log
function starts and data is stored in the internal
memory of the touch panel display.
After 250 entries of sampling data are stored, the
stored data will be written to the USB device.
Trend data will be recorded and saved to the
USB device as a CSV file.
The data will be written when: 1) 250 entries of
sampling data are stored, or 2) the "Start/Stop
Recording" button is touched.
If data recording continues after data is written, or
when the data log function is restarted, data will
continue to be written to the same CSV file.
(Data will be overwritten and appended.)
Figure:
Inside the control panel
USB port
Figure:
Example of stored file

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(3) Example of recorded data
The data written in the CSV file is recorded as in the figure below.
The upper limit of the collected data is dependent on the number of lines
able to be displayed by the browsing/editing software.
If the number of data exceeds the maximum number of lines of the
browsing/editing software, there is a possibility that the file may not be
opened.
Once the data in the USB device is retrieved, make sure to delete files and
folders on the USB device that have been automatically generated.
(If the data is not deleted, there is a possibility that new data will not be
written as the automatic recording does not function if the USB device is
used for the next record.)
Figure: Example of recorded data
NOTE: The above figure is an example of when the data is viewed with
Microsoft Excel (Microsoft Corporation). Microsoft Excel and Microsoft
Corporation are registered trademarks or trademarks.