Mitsubishi Electric PZ-70CSB-E Quick guide

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This CO2 sensor optimizes the amount of airow in accordance with the CO2 concentration within the room, and thus reduces the fresh air load.
■ This manual must be read both fully and carefully before commencing installation procedures; furthermore, the subsequent installation must be
performed correctly and safely in accordance with the instructions given.
■ After installation, ensure that this manual is given to the customer.
1. Safety Precautions
WARNING Incorrect handling could cause serious injury or death.
- Never modify or repair by yourself.
If the product is modied or inappropriately repaired, electric shock, re, etc. could result. Contact your dealer for repair.
- Do not move or reinstall the product by yourself.
If it is installed improperly, electric shock, re, etc. could result. Contact your dealer or technical representative.
-Usethespeciedcablesforwiringandconnectthemsecurely.Holdthecablessoasnottoapplyexternalforceofthecablestothe
connector.
Improper connection could result in heat generation or re.
-Allelectricalworkmustbeperformedbyalicensedtechnician,accordingtolocalregulationsandtheinstructionsgiveninthisInstallation
manual.
- EnsurethatinstallationworkisdonecorrectlyfollowingthisInstallationmanual.
If it is installed improperly, electric shock, re, etc. could result.
- Close the control cover after installation.
-Donotinstalltheproductinaplacewhereammablegasesmayleak.
If gas should leak or accumulate around the product, re or explosion could result.
- Do not use the product in special environments.
The product could be damaged if it is used in locations subject to large quantities of oil (including machine oil), steam, or sulde gas.
-Donotinstalltheunitinaplacewherethetemperaturerisesabove40˚C(104°F),wherelargeamountsofoil,steam,organicsolvents,or
corrosivegases,suchassulfuricgas,arepresent,orwhereacidic/alkalinesolutionsorspraysareusedfrequently.
These substances can compromise the performance of the unit or cause certain components of the unit to corrode, which can result in electric shock,
malfunctions, smoke, or re.
CAUTION Incorrect handling could cause injury or damage to property or household e󰀨ects.
- Wire so that it does not receive any tension.
Tension could cause wire breakage, heating or re.
-Putonglovesduringinstallation.
Failure to do so could cause injury.
Lossnay CO2Sensor Built-In Type
PZ-70CSB-E
Installation and Instruction Manual
2107876H65301

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2.ExternalDimensions,
IncludedAccessories,
andSpecications
■ Includedaccessories
Please conrm that the following accessory parts are included in the box.
1. CO2 sensor unit: x 1
2. Cross-slot truss head small screws 4x8: x 2
3. Safety caution for installation: x 1
4. Cord clip: x 1
■ Externaldimensions
■ Specications
Rated power supply voltage: 5 VDC (Supplied from the Lossnay)
Power consumption: 2 W or less.
Usage environment: 0 ˚C to 40 ˚C (32 ˚F to 104 ˚F), 90 % RH or less. (No
Cigarette Smoke or Sulfur and with no dew condensation)
Measurement accuracy: ± (70 + 5% of measurement value) ppm
Detection range: 300 to 2000 ppm
Weight: 0.14 kg (0.31 lb)
* 1: In the range of 0 ˚C (32 ˚F) or less, CO2 Sensor may not detect the
correct CO2 Concentration.
* 2: Measures the CO2 concentration around the location where the CO2
sensor is installed. In addition, the measurement accuracy may vary
depending on the usage environment, installation conditions, etc. but
this is not a malfunction.
Unit: mm (inch)
109 (4 19/64) 50 (1 31/32)
64 (2 33/64)
3. Installation Method
* Refer to the Operation Instructions and Installation instructions of
Lossnay unit.
* Figures show the installation method of LGH-RVS series.
3.1 Before installation
(1) Remove the Lossnay unit control box cover.
(2) Remove the Lossnay cores.
(3) Check that the installation screw hole positioning plate is a󰀩xed in the
ventilation path (RA).
3.2 CO2sensor installation
(1) Temporarily tighten the installation screw (included) at the position
indicated by on the installation positioning plate. After hooking CO2
sensor key hole on the temporary screw, align ● on the plate with the
screw holes and fully tighten the two screws to secure.
- Hole positions are approximate. If you cannot see the hole positions,
remove the installation screw hole positioning plate.
- Depending on the Lossnay model and installation conditions, the
gure below may be inverted. Additionally, please be aware that the
CO2 sensor installation location may di󰀨er depending on the Lossnay
model.
Note:
- Ensure that the CO2 sensor is installed in alignment with the position
indicated by the plate. Installing this in the wrong position may prevent
correct operation. Furthermore, this may result in damage to the sensor,
or a shortened service life.
- Do not use an electric screwdriver.
- Screw tightening torque: 1.42 ± 0.25 N・m
- Do not disassemble the CO2 sensor (sensor section) resin case.
- Do not use any screws other than the included screws.
Control box cover
Black screws
Lossnay core
Installation screw position
Installation positioning
plate
After temporar-
ily tightening the
screws, fully tighten Fully tighten screws
Screw hole
Plate
Plate
CO2 Sensor

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(2) Pass the CO2 sensor cable through the Lossnay unit communication
cables hole.
- If the inlet is covered by a packing, wind the packing onto CO2sensor
cable also. After winding the packing, return the packing to its original
position.
Note:
- Return the packing so that it does not come o󰀨 the Lossnay unit.
(3) A󰀩x the included cord clip to the Lossnay unit, and secure the CO2
sensor cable.
Note:
- Be careful not to exert force on the CO2 sensor.
- Ensure this is xed in a position that will not interfere with removal or
attachment of the Lossnay cores and air lters.
- Do not secure the CO2 sensor cable to the cord clip that was originally
a󰀩xed to the Lossnay unit. (Doing so may wire to incorrect operation or
damage)
Communication cables hole
CO2 sensor cable
Cord clip (included)
4.WiringDiagram
A qualied electrical technician is to carry out connection work.
Once installation work is complete, conrm again that wiring is as per the
wiring diagram, and that no parts or screws remain unused.
- Do not disconnect connectors that are already connected.
4.1CO2sensor connector connection
Pull the CO2 sensor cable into the Lossnay unit circuit box. (In order to
protect the edge, pass through the packing included with the Lossnay unit
board)
Connect the yellow and white wires to CN23; the blue wire to CN26, and
the red wire to CN35 on the Lossnay unit board.
Note:
- Ensure that connectors are fully inserted so that they do not come loose.
- Do not subject the connector to force.
- Refer to the wiring diagram for the connection location of each
connector.
- Connect CN26 to the white connector. Do not connect to the red or
green connectors. (This will result in damage to the circuit board or CO2
sensor)
Lossnay unit control circuit board
CN26
CN23 CN35
PZ-70CSB-E
CN35
(Wire color: Red)
CN23
(Wire color: Yellow/White)
CN26
(Wire color: Blue)
Cable inlet

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4.2Collectingexcesscable
(1) Collect excess cable using the cord clip included with the Lossnay
unit.
Note:
- Do not contact the CO2 sensor cable to PCB and the power cable.
(2) Reinstall Lossnay cores, lters, covers etc. according to the Lossnay
unit instruction book.
Note:
- Ensure the cable is not pinched in the control box.
■Whenusingexternalbypassswitchingonthisproduct
- While referring to the gure below, cut the wire of the CO2sensor
cable, and connect the remote controller adapter (PAC-SA88HA-E or
PAC-725AD (sold separately)).
Note:
- Ensure that a qualied electrical technician carries out cutting and
connecting of the wires.
- Ensure that unused wires (orange, green) are properly insulated.
- The product could be damaged if the wires are connected incorrectly.
- For details, refer to the Lossnay unit Installation Instructions.
Cord clip
1
2
3
4
5
Insulate
(PAC-SA88HA-E or PAC-725AD) CO2 sensor cable
Cut blue wire
Connect yellow
and blue wires
Brown
Red
Orange
Yellow
Green
5. Precautions
Airowfunction(unbalancedsupplyandexhaustairowsetting)is
notavailableduringtheLossnayunitfanspeediscontrolledbyCO2
sensor.
- CO2 concentrations will di󰀨er depending on the usage environment and
product installation conditions, therefore the value measured by the CO2
sensor may di󰀨er from the actual CO2 concentration within the room.
Additionally, for approximately 15 minutes after start-up, the measured
values may di󰀨er signicantly from the actual CO2 concentration within
the room.
- The automatic calibration function recognizes the lowest CO2
concentrations, such as at night or when there are fewer people coming
and going, as the standard value (corresponding to normal outside
CO2 concentrations) and corrects these correspondingly, therefore the
CO2 concentrations detected by the CO2 sensor and the actual CO2
concentration within the room may di󰀨er.
Therefore, if this product is used in locations in which the outside CO2
concentration is normally higher than the standard value (such as
near a major highway), or in an interior environment with higher-than-
normal CO2 concentrations, then there may be a signicant discrepancy
between the actual CO2 concentrations and the detected concentrations.
In these cases, use this product after conguring concentration
correction settings (Section 6.5) of the sensor output using the remote
controller (PZ-62DR-E).
- This CO2 sensor does not support automatic start/stop control.
- This CO2 sensor is intended for use in normal interior environments, and
may not be able to correctly detect CO2 concentrations if used in rooms
with extreme levels of dust, etc.
- Sudden changes in temperature or humidity may adversely impact the
detection accuracy of the CO2 sensor, causing the sensor to be unable
to correctly detect the CO2 concentration within the room.
- This product cannot be used in rooms in which cigarette smoke is
present.
- This product should not be used as a safety device to detect or prevent
poisonous gases that could cause hypoxia or carbon monoxide
poisoning, or ammable gases.
- This product cannot be used in hot spring areas or other areas with high
levels of sulfur dioxide. Doing so may lead to deterioration of the CO2
sensor.
- During night purge operation, auto fan speed by the CO2 sensor will not
be possible.

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6.Settings
To use the CO2 sensor for auto fan speed, conguration of settings on the remote controller (PZ-62DR-E) or the Lossnay circuit board dip switch is
required. Additionally, when using group control for multiple Lossnay units, conguration of address settings is required in order to congure di󰀨erent
function settings between Lossnay units. For how to congure the settings, refer to the Installation Instructions for the Lossnay unit used and the remote
controller.
* Group control and settings from Section 6.4 onward can only be set when using the PZ-62DR-E.
6.1Mainunitsettings
When using a single CO2 sensor to group-control multiple Lossnay units, connect the Main Lossnay unit (Lossnay unit with the youngest address in the
group) to the CO2 sensor.
* If not connecting a PZ-62DR-E, group control will not be available.
6.2 CO2sensorsetting
In order to use the CO2 sensor for auto fan speed, set either the Lossnay unit dip switch or the remote controller function settings to “Connected to PZ-
70CSB-E.” Conguring these settings enables to use auto fan speed using the CO2 sensor.
- If using a single CO2 sensor for group control of multiple Lossnay units, keep “CO2 sensor or BMS setting” for other than the Main Lossnay unit at
factory setting.
- When using group control for multiple Lossnay units, if connecting a CO2 sensor to each Lossnay unit, keep “CO2 sensor or BMS setting” in all Lossnay
units to “PZ-70CSB-E connection,” and set “Input priority setting" to “Individual control priority.”
- If using a remote controller, congure 6.4. CO2sensor setting - maximum side and minimum side.
6.3AutofanspeedsettingwithoutLossnayorM-NETcentralizedremotecontroller
If not connecting remote controllers or M-NET centralized controllers to the Lossnay unit, set the “Auto fan speed setting without Lossnay or M-NET
centralized remote controller” dip switch to ON.
6.4CO2sensorsetting-maximumsideandminimumside
The upper and lower limit of CO2 concentration are selectable.
The Lossnay unit controls its fan speed according to the set upper and the lower limit. Refer to the example on below.
Congure the settings from the remote controller CO2 control screen function settings. For how to congure the setting, refer to the Installation
Instructions for the remote controller.
* Upper limit available setting range: 600 (lower limit + 300) to 2000 ppm (increments of 50 ppm)
* Lower limit available setting range: 300 to (upper limit - 300) ppm (increments of 50 ppm)
* This automatically controls the amount of airow with the set CO2 concentration as standard, however given that CO2 concentration detection will di󰀨er
depending on the usage environment and product installation conditions, the value may exceed upper limit depending on the usage environment .
* If not using a remote controller, automatic airow control will be carried out at the factory default setting.
* Factory default setting: Upper limit 1000 ppm, lower limit 450 ppm
<Example>
Auto fan speed with the following limits:
CO2 upper limit: 1000 ppm
CO2 lower limit: 450 ppm
(Factory setting)
6.5 CO2sensor correction
The CO2 sensor recognizes the lowest CO2 concentration over the previous week as the standard value (corresponding to normal outside CO2
concentrations), and carries out calibration. The standard value for calibration is 400 ppm, however if this product is used in locations in which the
outside CO2 concentration is normally higher than the standard value (such as near a major highway), or in an interior environment with higher-than-
normal CO2 concentrations, then there may be a signicant discrepancy between the actual CO2 concentrations and the detected concentrations.
Therefore, congure the concentration correction function for CO2 sensor output.
For how to congure the setting, refer to “CO2 sensor correction” in the Installation Instructions for the Lossnay unit.
6.6 CO2concentrationdisplaysetting
When using a remote controller, the CO2 concentration can be displayed on the applicable Lossnay remote controller screen.
- To set the CO2 concentration display, refer to the remote controller Installation Manual, and set “Display details setting > Sensor value” to “Yes.”
- When displaying the CO2 concentration, the supply air temperature cannot be displayed at the same time.
- The CO2 concentration display value may di󰀨er from the actual CO2 concentration within the room. This product cannot be used as a measurement
device.
- For approximately 15 minutes after turning the power on, or when changing 6.2 CO2sensor setting, the CO2 sensor will be in warm-up operation.
During warm-up operation, the remote controller CO2 concentration display will show “---ppm.”
- For approximately 15 minutes after starting operation, The CO2 concentration display value may greatly di󰀨er from the actual CO2 concentration within
the room.
- The CO2 concentration display range is 400 to 2000 ppm. If the concentration exceeds 2000 ppm, “2000 ppm” will be displayed, and if less than 400
ppm, “LO ppm” will be displayed. Additionally, the concentration is displayed in increments of 50 ppm from 400 to 1000 ppm, and increments of 100
ppm from 1000 to 2000 ppm.
* Fan output is switched in 16 steps for each CO2
concentration equally divided between 450 ppm (CO2
lower limit) and 1000 ppm (CO2 upper limit).
450 1000
100%
95%
90%
85%
80%
75%
70%
65%
60%
55%
50%
45%
40%
35%
30%
25%
(ppm)
(Fan output)

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TOKYO BLDG. , 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
ManualDownload
Go to the website below to download manuals, select model name, then choose language.
http://www.mitsubishielectric.com/ldg/ibim/
6.7 CO2concentration correction
The CO2 sensor detects CO2 concentration at the RA path in the Lossnay unit and CO2 concentration within the room varies.
Thus, the CO2 concentration values displayed on the remote controller may di󰀨er from CO2 concentration values detected by environment measuring
instruments. If there is a gap between the CO2 concentration values displayed on the remote controller and the environment measuring instrument, the
display can be corrected by the remote controller function setting “CO2 concentration correction.”
7. Trial Operation
Trialoperationwiththeremotecontroller
Press the ON/OFF button on the Lossnay remote controller, press the button, and conrm that the remote controller responds in the following order.
Conrm that the CO2 concentration is displayed on the screen. (When CO2 concentration display is set to “Available”)
F1 F2 F3 F4
Auto
Auto CO2
1 ppm
Outdoor
2 °C
Return
2 °C
Fan Mode
Auto
* The airow scale next to the “Auto” fan speed
icon automatically changes according to the fan
speed switched by the CO2 sensor.
- Setting the fan speed to “Auto” will start automatic fan speed control using the CO2 sensor.
- In order to detect the CO2 concentration in the room at the start of operation with the “Auto” fan speed, sensing operation is performed at fan speed 4
for about 15 minutes. After sensing is completed, the fan speed is automatically switched according to the CO2 concentration.
The remote controller displays the fan speed on a scale of 1 to 4.
For the 16 steps fan speed by the automatic fan speed control:
During 25 to 45% fan speed operation, it displays the fan speed on a scale of 1.
During 50 to 70% fan speed operation, it displays the fan speed on a scale of 1 and 2.
During 75 to 95% fan speed operation, it displays the fan speed on a scale of 1 to 3.
During 100% fan speed operation, it displays the airow on a scale of 1 to 4.
- If a “5501” error is displayed on the remote controller, this may indicate an error in either the CO2 sensor connection method or the settings method.
Check the installation method and wiring diagram, and reinstall.
- For approximately 15 minutes after turning the power on, or when changing 6.2 CO2sensor setting, the CO2 sensor will be in warm-up operation.
During warm-up operation, the Lossnay unit operates at fan speed 4, and the remote controller displays “--- ppm” on the screen regardless of the CO2
concentration.
- If the CO2 concentration display does not change for a long period of time, there may be incorrect wiring or broken wiring.
After trial operation, check if there is any abnormality displayed on the remote controller or on the centralized controller, or if the abnormality display LED
on the Lossnay unit control board is blinking.
If there is an abnormality displayed, check the installation method and wiring diagram, and reinstall.