MITSUBISHI ELECTRIC PZ-70CSD-E Ducted Mounted CO2 Sensor Instruction Manual

MITSUBISHI ELECTRIC PZ-70CSD-E Ducted Mounted CO2 Sensor

Specifications

• Product Name: Lossnay CO2 Sensor Duct-mounted Type
• Model Number: PZ-70CSD-E
• Optimizes airflow based on CO2 concentration
• For use with applicable Lossnay models

Product Usage Instructions

Safety Precautions
WARNING:

• Never modify or repair the product by yourself. Contact your dealer for repair.
• Do not move or reinstall the product by yourself. Contact your dealer or technical representative.
• Use specified cables for wiring and connect them securely.
• All electrical work must be performed by a licensed technician.
• Ensure correct installation following the manual. Cut off power supply during installation.
• Close the control cover after installation.
• Avoid installing the product in places with flammable gases.

CAUTION:

• Wire so that it does not receive any tension.
• Put on gloves during installation.
• Avoid putting strong shock on the product.

External Dimensions, Included Accessories, and Specifications
Included accessories:

• CO2 sensor unit: x 1
• Installation and Instruction Manual: x 1

External dimensions:
Installation Method

• Refer to the Operation Instructions and Installation instructions of Lossnay unit.
• If not indicated, figures show the installation method of LGHRVX3 series. Depending on the model of Lossnay or installation condition, the actual PCB and following diagram can be upside down.
• Before Installation
  Be sure to perform installation while the power of the Lossnay unit is Off.

FAQ

• Q: What should I do if I encounter a malfunction after installation?
  A: In case of a malfunction, immediately cut off the power supply to the unit and contact your dealer for assistance.

Lossnay CO2 Sensor Duct-mounted Type
PZ-70CSD-E
Installation and Instruction Manual

This CO2 sensor optimizes the amount of airflow in accordance with the CO2 concentration within the room, and thus reduces the fresh air load.
Refer to the specification sheet for applicable Lossnay models.

• 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.

Safety Precautions

• WARNING Incorrect handling could cause serious injury or death.

• Never modify or repair by yourself.

• If the product is modified or inappropriately repaired, electric shock, fire, etc. could result. Contact your dealer for repair.

• Do not move or reinstall the product by yourself.

• If it is installed improperly, electric shock, fire, etc. could result. Contact your dealer or technical representative.

• Use the specified 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 fire.

• 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. During the installation work, the power supply to Lossnay unit shall be cut off.

• If it is installed improperly, electric shock, fire, etc. could result.

• Close the control cover after installation.

• Do not install the product in a place where flammable gases may leak.
  If gas should leak or accumulate around the product, fire 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 sulfide 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 fire.

• CAUTION Incorrect handling could cause injury or damage to property or household effects.

  • Wire so that it does not receive any tension. Tension could cause wire breakage, heating or fire.
  • Put on gloves during installation.
  • Failure to do so could cause injury.
  • Do not put strong shock on the product.
  • It could cause malfunction.

External Dimensions, Included Accessories, and Specifications

• Included accessories
• Please confirm that the following accessory parts are included in the box.

1. CO2 sensor unit: x 1
2. Installation and Instruction Manual: x 1

• External dimensions

Specifications

Cigarette Smoke or Sulfur and with no dew condensation)
Measurement accuracy| ± (70 + 5% of measurement value) ppm
Detection range| 400 to 2000 ppm

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 flowing the duct. It may be different 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.

Installation Method

• Refer to the Operation Instructions and Installation instructions of Lossnay unit.
• If not indicated, figures show the installation method of LGH-RVX3 series. Depending on the model of Lossnay or instal-lation condition, the actual PCB and following diagram can be upside down.

Before installation
Be sure to perform installation while the power of the Lossnay unit is Off.

• Remove the Lossnay unit control box cover.

• Models other than RVXT series

• Models RVXT series

CO2 sensor installation

1. Make holes on the RA (Return air) duct.

   • Scales of each hole
   • Note :
     Make sure to make 3 holes parallel to the flow in the duct.

2. Fix CO2 sensor on the duct. For round duct

For rectangular duct

• In case of installing on the rectangular duct like RVXT series, place the sensor on the center of whichever side except bot-tom side.
• Also the minimum distance between the sensor and Lossnay inlet shall be 300 mm or more for normal detection.

Note:

• When the CO2 sensor is installed on the duct above non-detachable ceiling, make sure to fix a opening for servicing. Choose screws with corrosion resistance so that rust does not occur due to potential difference 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, expan-sion or reduction. It could cause incorrect CO2 concentration detection.
• Installing CO2 sensor in the wrong position may prevent cor-rect 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.

Models other than RVXT series

• Pass the CO2 sensor cable through the communication

Models RVXT series

•  Follow the steps below to shift the ferrite core on the cable 220 mm from its original position to the sensor unit side.
  • Remove the ferrite core, align the lead mark with the left (connector side) end of the ferrite core, and wrap it once to close the ferrite core.(Align the claws of the ferrite core and attach until it clicks.)
• Pass the CO2 sensor cable through the cord clip and pass them through either bushing. Collect excess cable by using the cord clip mounted in the side of the control cover.
• 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.

Wiring Diagram

• A qualified electrical technician is to carry out connection work.

• Once installation work is complete, confirm again that wiring is as per the wiring diagram.

• Do not disconnect connectors that are already connected.

• CO2 sensor 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.
  Models other than RVXT series

• Models RVXT series

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 confirm the connector No. displayed on PCB, because miswiring will damage to PCB or CO2 sensor. The color of connector may be different from the printed let-ters on PCB or wiring diagram.

Collecting excess cable

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.
   • Models other than RVXT series
   • Models RVXT series

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.
• When using external bypass switching on this product
  • While referring to the figure 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 qualified electrical technician carries out cut-ting 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.

Precautions

• Airflow function is not available during the Lossnay unit fan speed is controlled by CO2 sensor.
  If fan speed should be controlled by CO2 sensor with unbalanced supply and exhaust air flow, please refer to section 6.8.

• CO2 concentrations will differ depending on the usage environment and product installation conditions, therefore the value mea-sured by the CO2 sensor may differ from the actual CO2 concentration within the room.
  Additionally, for approximately 15 minutes after start-up, the measured values may differ significantly 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 correspondingly, therefore the CO2 concentrations detected by the CO2 sensor and the actual CO2 concentration within the room may differ. 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 significant discrepancy between the actual CO2 concentrations and the detected concentrations. In these cases, use this product after configuring concentration correction settings (Section 6.5) of the sensor output using the remote controller (PZ/TZ-62DR series).

• 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 flammable 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.

Settings

To use the CO2 sensor for auto fan speed, configuration of settings on the remote controller (PZ/TZ-62DR series) or the Lossnay circuit board dip switch is required. Additionally, when using group control for multiple Lossnay units, configuration of address set-tings is required in order to configure different function settings between Lossnay units. For how to configure 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/TZ-62DR series.

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/TZ-62DR series, group control will not be available.

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- 70CSD-E.” Configuring 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-70CSD-E connection,” and set “Input priority setting” to “Individual control priority.”
   • f using a remote controller, configure 6.4. CO2 sensor setting – maximum side and minimum side.

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.

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. Configure the settings from the remote controller CO2 control screen function settings. For how to configure 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 airflow with the set CO2 concentration as standard, however given that CO2 concentration detection will differ 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 airflow control will be carried out at the factory default setting.

   • Factory default setting: Upper limit 1000 ppm, lower limit 450 ppm

   • Auto fan speed with the following limits:

   • CO2 upper limit: 1000 ppm

   • CO2 lower limit: 450 ppm

   • (Factory setting)

5. CO2 sensor 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 significant discrepancy between the actual CO2 concentrations and the detected  concentrations. Therefore, configure the concentration correction function for CO2 sensor output.
   • For how to configure the setting, refer to “CO2 sensor correction” in the Installation Instructions for the Lossnay unit.

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 differ 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 CO2 sensor 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 differ from the actual CO2 concentration within the room.
   • The CO2 concentration display range is 400 to 2000 ppm.

7. CO2 concentration 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 differ 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.”

8.  Indoor negative / positive pressure setting at auto fan speed setting

   • 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, TLGHFRVX(T)02A, LGH-FRVX(T)2 and LGH-RVX(T)3. 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/TZ-62DR series| Setting Date| Setting check| Fan that reduce air flow
---|---|---|---|---|---
SW No.| Setting| Function No.

N/A

| –| –|

94

| 0

(Factory setting)

| | N/A
–| –| 1| | Supply fan
–| –| 2| | Exhaust fan
DIP-SW| Setting check| PZ/TZ-62DR series| 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%

 Trial Operation

Trial operation with the remote controller
Press the ON/OFF button on the Lossnay remote controller, press the F2 button, and confirm that the remote controller responds  in the following order. Confirm that the CO2 concentration is displayed on the screen. (When CO2 concentration display is set to “Available”)

• 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 airflow 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 CO2 sensor 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.

TOKYO BLDG. , 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

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