Honeywell C7355B User Manual
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Honeywell C7355B User Manual

In-duct iaq monitor
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C7355B In-Duct IAQ Monitor
f t 0
D r a
INTRODUCTION
About This Monitor
This air quality monitor is specially designed for
monitoring multiple air quality parameters in the air duct.
The sensor is installed in the outdoor or return air duct.
Real time monitoring parameters are particles (PM2.5 and
PM10), carbon dioxide (CO
relative humidity.
The intelligent control algorithms built into the device
help to minimize the influence of ambient temperature
and humidity on the measured values. The device is
3
), TVOC, air temperature and
2
packaged with numerous presets suitable for most
commercial building requirements that enable quick and
easy initial setup.
The device, with pitot tube inlet and outlet design instead
of common air pump, adapts to a wider range of air speeds
and insures a long lifetime of usage. It provides Modbus
RTU (RS-485) communication protocol, easily integrating
with the building automation system.
Intended audience and assumed
knowledge
This document provides information about installing and
commissioning the IAQ monitor. It also shows how to
operate the user interface.
It is assumed that the user is trained and familiar with
HVAC concepts.
IMPORTANT
Always install equipment in accordance with the
National Electric Code and in a manner acceptable
to the local authority having jurisdiction (AHJ). No
guidelines, instructions, installation practices, or
other information presented in this guide may be
interpreted to supersede or modify the local codes
and practices of the AHJ.
Reference documents
• In-Duct IAQ Monitor Specification Data 31-00439:
Describes in-duct IAQ monitor and its features.
• In-Duct IAQ Monitor Mounting Instructions 31-00440:
Describes how to mount the monitor.
• In-Duct IAQ Monitor Quick Start Guide 31-00441:
Contains only necessary procedures to enable the
users to quickly use the device.
USER GUIDE
31-00438-01

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Summary of Contents for Honeywell C7355B

  • Page 1 C7355B In-Duct IAQ Monitor USER GUIDE packaged with numerous presets suitable for most commercial building requirements that enable quick and easy initial setup. The device, with pitot tube inlet and outlet design instead of common air pump, adapts to a wider range of air speeds and insures a long lifetime of usage.

  • Page 2: Dimensions And Mounting Holes

    C7355B IN-DUCT IAQ MONITOR DIMENSIONS AND MOUNTING HOLES Fig. 1. Dimensions SPECIFICATIONS Storage Condition: 32 to 122°F (0°C to 50°C) 10 to 60% RH Part Number: C7355B1052 Overall Dimension: See Fig. 1 Detection Parameters: PM2.5/PM10, CO2, TVOC, Temperature & RH Net weight: 1.87lb (850g)

  • Page 3: Monitor Overview

    C7355B IN-DUCT IAQ MONITOR IN-DUCT IAQ MONITOR AT A GLANCE Table 1. Light Indication Display LED status and Description Monitor Overview Work indicator The image below illustrates the typical enclosure of the When the power is on, it will illuminate to indicate IAQ monitor.

  • Page 4: Wiring Diagram

    C7355B IN-DUCT IAQ MONITOR Wiring Diagram 2. Remove the two terminal blocks for power supply and RS-485 respectively. Fig. 4. Wiring Diagram Fig. 6. There are two sets of terminals, power supply wiring on the left, RS-485 wiring on the right.

  • Page 5: Modbus Register Table

    C7355B IN-DUCT IAQ MONITOR 4. Connect the cable to the terminal blocks. 6. Replace the cover of the electrical wiring compart- ment and tighten the screws. Fig. 8. Fig. 10. 5. Plug the terminal block back onto the pin connector and tighten the waterproof connectors.
  • Page 6 C7355B IN-DUCT IAQ MONITOR Table 2. Modbus Register Table. Starting Quantity of Register Read/ Registers Data Range, Decimal Data Description Function Write (2Bytes/16bit) Format Decimals Data Description Default 0/1050 PM2.5 hourly average Float-Big μ 0–1000.0 measurement Endian 2/1052 PM10 hourly average Float-Big μ...
  • Page 7 C7355B IN-DUCT IAQ MONITOR Table 2. Modbus Register Table. Starting Quantity of Register Read/ Registers Data Range, Decimal Data Description Function Write (2Bytes/16bit) Format Decimals Data Description Default 1304 AQI value of the primary INT16 0–500 pollutant) (One of PM2.5/PM10/CO...
  • Page 8 0–4.000 mg/m CORRECTION AND Humidity: 40% to 50% RH The C7355B needs to be placed in the indoor natural CALIBRATION environment within the above temperature and humidity range. There should be windows and no human interference with good air circulation.

  • Page 9: Regular Maintenance

    C7355B that needs to be corrected are calibration standard powered on continuously and synchronously for After the TVOC and C7355B that needs to be corrected more than 60 minutes, start to record the value of are powered on continuously and synchronously for...

  • Page 10: Maintenance Procedure

    C7355B IN-DUCT IAQ MONITOR Maintenance Procedure 1. Open the upper compartment of the main unit. Fig. 11. 2. Remove the dust filter next to the air inlet of the sensor module, clean the filter. Fig. 12. 31-00438—01...
  • Page 11 C7355B IN-DUCT IAQ MONITOR 3. Remove the mounting screw on the middle of the sensor module, take out the sensor module, and clean the sensor module inlet and outlet, use compressed air to clean the sensor module inside. STEP 3-1...

  • Page 12: Waste Electrical And Electronic Equipment (Weee)

    24 hours when the outdoor air is good and clear, allowing TVOC to retrace its baseline. Temperature and humidity deviation is Check whether the environmental factors surrounding the C7355B has any too large, the value is too high or low influence, such as direct sunlight, close to the heating or air conditioning air outlets, etc.

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