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C7355A Room IAQ Monitor
INTRODUCTION
About This Monitor
This air quality monitor is an advanced, configurable,
connected device for commercial buildings' air quality
monitoring. It monitors multiple air quality parameters
including PM2.5, PM10, CO
humidity. This device communicates over RS-485, easily
integrating with the intelligent building, air quality data
collection system, green building evaluation system and
ventilation system, etc.
The intelligent control algorithms built into the device
helps to minimize the influence of ambient temperature
and humidity on the measured values. The device is
, TVOC, temperature and
2
packaged with numerous presets suitable for most
commercial building requirements that enable quick and
easy initial setup.
The sensor module in the monitor is specifically designed
for detection stability to ensure reliability. The monitor has
a three-color light ring to indicate different levels of indoor
air quality. The simple structure and installation makes
wall-mounting and ceiling mounting both easy and
convenient.
Intended audience and assumed
knowledge
This document provides information about installing and
commissioning the IAQ monitor.
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
• IAQ Monitor Specification Data 31-00435: Describes
IAQ monitor and its features.
• IAQ Monitor Mounting Instructions 31-00436:
Describes how to mount the IAQ monitor.
• IAQ Monitor Quick Start Guide 31-00437: Contains
only necessary procedures to enable the users to
quickly use the device.
USER GUIDE
31-00434-01
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Summary of Contents for Honeywell C7355A
- Page 1 C7355A Room IAQ Monitor USER GUIDE packaged with numerous presets suitable for most commercial building requirements that enable quick and easy initial setup. The sensor module in the monitor is specifically designed for detection stability to ensure reliability. The monitor has a three-color light ring to indicate different levels of indoor air quality.
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Page 2: Specifications
C7355A ROOM IAQ MONITOR Dimensions Fig. 1. Dimensions. SPECIFICATIONS Part Number: C7355A1050 Detection Parameters: PM2.5/PM10, CO ,TVOC, Tem- perature & RH Light Ring Operating Environment Temperature: 32–122 °F (0–5 0 °C) Humidity: 0–90% RH (non-condensing) Storage Conditions: 14–122 °F (-10–50 °C);... -
Page 3: Installation
C7355A ROOM IAQ MONITOR INSTALLATION 3. Pull wires through the opened hole. See Fig. 6 and 7. WARNING • To reduce the risk of electrical shock do not open the detector. There are no user serviceable parts inside. Refer service to a qualified service personnel only. - Page 4 C7355A ROOM IAQ MONITOR Fig. 13. RS-485 CONFIGURATION Fig. 10. Prerequisites Before going through RS-485 configuration, ensure the monitor is installed and wired up according to the Mounting Instructions. After installing the monitor and powering it up for initial use or re-use, the device should be continuously powered for more than 48 hours to ensure stable output of all measured values.
- Page 5 C7355A ROOM IAQ MONITOR Table 1. 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 6 C7355A ROOM IAQ MONITOR Table 1. 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 7 C7355A ROOM IAQ MONITOR Table 1. Modbus Register Table. Starting Quantity of Register Read/ Registers Data Range, Decimal Data Description Function Write (2Bytes/16bit) Format Decimals Data Description Default Modbus Parity check bit 3/6 UINT16 1-NONE, 1STOP_BIT, 2-NONE, 2STOP_BIT, 3-Odd, 1STOP_BIT,4-Even,...
- Page 8 PM2.5 >75 Indicator lights are configured for data points to indicate the conditions that may require control. C7355A helps to view and manage the data points alarm. It also groups the indicators into High, Medium and Low categories. You can view the indicators on the C7355A detector light ring.
- Page 9 PM2.5/PM10 calibration standard: TSI 8533 as a stan- dard machine, or a new C7355A device. After the new C7355A and the old C7355A that needs to be corrected are powered on continuously and synchronously for more than 10 minutes, record the PM2.5 value for 30 minutes, and synchronous aver-...
- Page 10 C7355A ROOM IAQ MONITOR Measurements Adjustment via MODBUS: 1. Temperature 2. Humidity 3. CO 4. TVOC coefficient 5. Particle coefficient Use MODBUS PC software to operate according to the following table: Table 4. Measurement Adjustment via MODBUS. Particle total environmental...
- Page 11 Fault condition Troubleshooting PM2.5 data abnormal, deviation is too Check whether there is debris or a lot of dust in the C7355A housing or on the large, the value is too high or too low air inlet and air outlet.
- Page 12 C7355A ROOM IAQ MONITOR Honeywell Building Technologies In the U.S.: Honeywell 715 Peachtree Street NE Atlanta, GA 30308 ® U.S. Registered Trademark customer.honeywell.com ©2020 Honeywell International Inc. 31-00434—01 M.S. 10-20 buildingcontrols.honeywell.com Printed in United States...