Mitsubishi Electric PZ-70CSD-E Quick guide

Eng-1
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.

cables to the connector.
Improper connection could result in heat generation or re.


- 
󰀨
If it is installed improperly, electric shock, re, etc. could result.
- Close the control cover after installation.

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.


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.

Failure to do so could cause injury.

It could cause malfunction.
2Sensor Duct-mounted Type

Installation and Instruction Manual
2301876HG4001

Eng-2



 
Please conrm that the following accessory parts are included
in the box.
1. CO2 sensor unit: x 1
2. Installation and Instruction Manual: x 1
 
 
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: Less than 2000ppm
* 1: In the range of 0 ˚C (32 ˚F) or less, CO2 Sensor may not
detect the correct CO2 Concentration.
* 2: The sensor measures CO2 concentration of the air owing
the duct. It may be di󰀨erent from the value at hand. In
addition, the measurement accuracy may vary depending
on the usage environment, installation conditions, etc. but
this is not a malfunction.
3. Installation Method
* Refer to the Operation Instructions and Installation
instructions of Lossnay unit.
* If not indecated, gures show the installation method of
LGH-RVX3 series.
3.1 Before installation
Remove the Lossnay unit control box cover.
3.2 CO2sensor installation
(1) Make holes on the RA (Return air) duct.
Scales of each hole
mm (inch)
Note:
- Make sure to make 3 holes parallel to the ow in the duct.
(2) Fix CO2 sensor on the duct.
45 (1 49/64) 45 (1 49/64)
φ30 (1 3/16)
Air ow direction
Allowed mounting position
(Within ±90 deg from top)
for sensor nozzle
2 pilot holes for drilling screws
-90 deg +90 deg
0 deg
CO2sensor
2 x drilling screw
(eld supply)
Duct
Unit: mm (inch)
117 (4 39/64) 65 (2 9/16)
75 (2 61/64)
2 - φ5 (13/64)
Black screws
 
 
Control box cover
Control box
cover
 
 
Black
screws

Eng-3
Note:
- When the CO2 sensor is installed on the duct above non-
detachable ceiling, make sure to x a opening for servicing.
- Choose screws with corrosion resistance so that rust does
not occur due to potential di󰀨erence between the duct and
screws.
- The location where sensor is mounted should be noted and
provision for access for maintenance or replacement made.
- Do not install the sensor just before or after bends,
expansion or reduction. It could cause incorrect CO2
concentration detection.
- Installing CO2 sensor 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.
- Do not disassemble the CO2 sensor (sensor section) resin
case.
(3) Pass the CO2 sensor cable through the communication
cables hole.
Note:
- Be careful not to exert force on the CO2 sensor.
- Seal the opening between the busing and the cables in order
not to intrude insects.
Insert the cutting
Bush
Communication
cables hole
CO2 sensor cable

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.
-Do not disconnect connectors that are already connected.
2sensor connector connection
Pull the CO2 sensor cable into the Lossnay unit circuit box.
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.
- Be sure to conrm the connector No. of each.
The color of connector may be di󰀨erent from the printed let-
ters on PCB or wiring diagram.
CN35
(Wire color: Red)
CN23
(Wire color: Yellow, White)
CN26
(Wire color: Blue)
Cable inlet

Eng-4

(1) Collect excess cable by using the cord clip mounted in the
side of the control box of Lossnay unit.
(2) Fix the Ferrite core attached to the CO2 sensor cable with
the cord clip near the BUSH outside the control box.
Note:
- Separate the excess cable and power supply cable by 5 cm
(2") or more to prevent malfunctioning of the unit.
- Ensure the cable is not pinched in the control box.

product
- While referring to the gure below, cut the wire of the CO2
sensor 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 cut-
ting and connecting of the wires.
- Ensure that unused wires (orange, green) are properly insu-
lated.
- The product could be damaged if the wires are connected
incorrectly.
- For details, refer to the Lossnay unit Installation Instructions.
Ferrite core
Cord clip
CO2 sensor cable
Power supply cable
1
2
3
4
5
Insulate
(PAC-SA88HA-E or PAC-725AD) CO2sensor
cable
Cut blue wire
Connect yellow
and blue wires
Brown
Red
Orange
Yellow
Green

Eng-5

2sensor.
If fan speed should be controlled by CO6.8.
- CO2 concentrations will di󰀨er depending on the usage environment and product installation conditions, therefore the value mea-
sured 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 con-
centration 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 correspond-
ingly, 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 prod-
uct after conguring concentration correction settings (Section 6.5) of the sensor output using the remote controller (PZ-62DR-
EA/EB (TZ-62DR-EA)).
- 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 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 deteriora-
tion of the CO2 sensor.
- During night purge operation, auto fan speed by the CO2 sensor will not be possible.
- Do not install the unit in a location exposed to direct sunlight.
- The lifetime of the product is 25,000 hours.
It is recommended to replace after the lifetime has been past.

To use the CO2 sensor for auto fan speed, conguration of settings on the remote controller (PZ-62DR-EA/EB (TZ-62DR-EA)) 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 set-
tings, 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-EA/EB (TZ-62DR-EA).

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-EA/EB (TZ-62DR-EA), group control will not be available.
2
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-70CSD-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 “CO2sensor or
BMS setting” in all Lossnay units to “PZ-70CSD-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.

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.

Eng-6
2
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 concentra-
tion 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:
CO2upper limit: 1000 ppm
CO2 lower limit: 450 ppm
(Factory setting)
2sensor 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 func-
tion for CO2 sensor output.
For how to congure the setting, refer to “CO2 sensor correction” in the Installation Instructions for the Lossnay unit.
2
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.
2concentration 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 concentra-
tion correction.”
* Fan output is switched in 16 steps
for each CO2 concentration equally
divided between 450 ppm (CO2
lower limit) and 1000 ppm (CO2up-
per limit).
450 1000
100%
95%
90%
85%
80%
75%
70%
65%
60%
55%
50%
45%
40%
35%
30%
25%
(ppm)
(Fan output)

Eng-7

At auto fan speed setting operation, supply fan or exhaust fan can be unbalanced to keep indoor negative or positive pressure.
This function is N/A from Lossnay unit DIP-SW.
Below setting is example for LGH-RVS, TLGHFRVX02A, LGH-FRVX2, and LGH-RVX3. For other products, refer to the manuals
for the each products.
Select supply fan or exhaust fan to be power down comparing to the other at No. 94.
The percentage of power down can be selected at No. 95.
The unbalance setting can not be kept when the lower side fan power reaches 25%.
DIP-SW Setting
check
PZ-62DR-EA/EB
(TZ-62DR-EA) Setting Date Setting
check Fan that reduce air ow
SW No. Setting Function No.
N/A
- -
94
0
(Factory setting) N/A
- - 1 Supply fan
- - 2 Exhaust fan
DIP-SW Setting
check
PZ-62DR-EA/EB
(TZ-62DR-EA) Setting Date Setting
check
Percentage of power reduction
comparing to opposite fan
SW No. Setting Function No.
N/A
- -
95
0
(Factory setting) N/A
- - 1 5%
- - 2 10%
- - 3 15%
- - 4 20%
- - 5 25%
- - 6 30%
- - 7 35%
- - 8 40%
- - 9 45%
- - 10 50%
- - 11 55%
- - 12 60%
- - 13 65%
- - 14 70%
- - 15 75%

TOKYO BLDG. , 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
7. Trial Operation

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.

Related Links Model Number: LGH-160RVX3-E
LGH-15-200RVX3-E Declaration of Conformity
(N22HHGT0011)
LGH-15-200RVX3-E Installation Manual (N22HHZA0013)
LGH-15-200RVX3-E Instruction Book (N22HHZA0012)
LGH-15-200RVX3-E Service Manual (U318)
LGH-160RVX3-E Specification Sheet (N22HHGU0008)
LGH-RVX3-E Infographic
LGH-RVX3-E Product Information Sheet
PZ-4GS-E Installation Manual (876H65501)
PZ-70CSD-E Installation Manual (876HG4001)
PZ-70CSW-E Installation Manual (876H65401)