Copyright HK Instruments 2021
www.hkinstruments.fi
Installation version 1.0 2021
INSTALLATION
INSTRUCTIONS
Indoor air quality transmitters
Siro-MOD series
• READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING
TO INSTALL, OPERATE OR SERVICE THIS DEVICE.
• Failure to observe safety information and comply with instructions
can result in PERSONAL INJURY, DEATH AND/OR PROPERTY
DAMAGE.
• To avoid electrical shock or damage to equipment, disconnect
power before installing or servicing and use only wiring with
insulation rated for full device operating voltage.
• To avoid potential fire and/or explosion do not use in potentially
flammable or explosive atmospheres.
• Retain these instructions for future reference.
• This product, when installed, will be part of an engineered system
whose specifications and performance characteristics are not
designed or controlled by HK Instruments. Review applications
and national and local codes to assure that the installation will
be functional and safe. Use only experienced and knowledgeable
technicians to install this device.
Thank you for choosing an HK Instruments Siro-MOD series indoor air
quality transmitter. The Siro-MOD series transmitters are intended for
use in building automation systems in the HVAC/R industry.
Siro-MOD is an indoor air quality transmitter with a modern design. The
transmitter is available with several optional air quality sensors. The
modular device can be equipped with CO
2
concentration and VOC (Vola-
tile Organic Compounds) measurements or alternatively PM (Particulate
Matter) measurement and in addition temperature and humidity meas-
urements. It offers easy installation and adjustment, several different
model options and various output signals that are configurable separately
for each measurement parameter.
The Siro-MOD series devices are available with user interface that in-
cludes LCD display and buttons making the configuration of the device
quick and easy. An external configuration tool is necessary for commis-
sioning preparations for Siro-MOD without user interface. Configura-
tion is also possible via Modbus network. Siro-MOD utilizes the industry
standard NDIR measurement principle with self-calibrating ABC logic
TM
for CO
2
measurement.
• PM concentration to measures the size and amount of particulates
in the indoor air for example to assess the performance of air filters
• temperature and humidity in HVAC/R environment
SPECIFICATIONS
Performance
Measurement ranges:
CO
2
:
0–2000 ppm / 400–2000 ppm
(selectable via jumper)
VOC:
CO₂eq: 400–2000 ppm
TVOC ppm: 0–30.0 ppm
TVOC µg/m
3
: 0–10000 µg/m
3
IAQ index: 1–5 (UBA rating)
PM1/PM2.5/PM10: 0–50 μg/m
³
/ 0–500 μg/m
³
(selectable via jumper)
IAQ index: 1-5 (WHO rating)
Temperature:
0...50 °C
Relative humidity:
0–100 %rH
Accuracy:
CO
2
:
±30 ppm + 3 % of reading (typical),
additional ±60 ppm for first weeks
VOC*:
15 % of reading (typical)
*VOC sensor is tuned for typical IAQ Mix of 22 VOCs as
defined by Mølhave et al. (1997)
PM:
0…100 µg/m3:
PM2.5:
±15 µg/m³ (at 25 ⁰C ±5 ⁰C)
PM1/PM10*:
±25 µg/m³ (at 25 ⁰C ±5 ⁰C)
100…1000 µg/m3:
PM2.5:
±15 % (at 25 ⁰C ±5 ⁰C)
PM1/PM10*:
±25 % (at 25 ⁰C ±5 ⁰C)
*PM1 and PM10 values are calculated from PM2.5
measurement reading with the default particle distribution.
Temperature:
±0.4 ⁰C (typical at 20 ⁰C)
Relative humidity:
±2.2 %rH (typical at 20 ºC, 30 %rH)
Technical Specifications
Media compatibility:
Dry air or non-aggressive gases
Measuring units:
CO₂:
ppm
VOC:
CO
2
eq: ppm
TVOC: ppm, µg/m
³
PM:
PM1/PM2.5/PM10: µg/m
³
Temperature:
°C/°F
Relative humidity:
%rH
Measuring element:
CO
2
:
Non-dispersive infrared (NDIR)
VOC:
Complementary Metal Oxide
Semiconductor (CMOS)
PM:
Laser-based light scattering particle sensing
Temperature:
Integrated to CMOS
Relative humidity:
Thermoset polymer capacitive
sensing element
Calibration:
Automatic self-calibration ABC Logic
TM
for CO
2
measurement
Environment:
Operating temperature: 0...50 °C
Storage temperature: -20...70 °C
Humidity: 0 to 95 %rH, non condensing
Physical
Dimensions:
Case: 95 x 103 x 30 mm
(width x height x depth)
Weight:
130 g
Mounting:
2 screw holes slotted, distance c/c 60 mm
Materials:
Case: ABS
Protection standard:
IP20
Display (optional)
Monochrome LCD, 38 x 23 mm
Electrical connections:
10-pin spring loaded terminal block
0.2...1.5 mm² (16-24 AWG)
Electrical
Input:
24 VAC or VDC, ±10 %
Power consumption: 2 W max + 25 mW for each
voltage output or 50 mW for each current output
Outputs:
4 outputs, have to select voltage or current
Voltage outputs:
0–10 V
2–10 V / 0–5 V (optional, display or
configuration tool required)
Current output:
4–20 mA (optional)
Output signal limits:
Voltage outputs: R > 1 kΩ
Current output: R > 20 Ω, R < 500 Ω
Communication
Protocol: MODBUS over Serial Line
Transmission Mode: RTU
Interface: RS485
Byte format 11 bits (10 bits if parity none):
Coding System: 8-bit binary
Bits per Byte:
1 start bit
8 data bits, least significant bit sent first
1 bit for parity
1 stop bit
Baud rate: selectable in configuration
Modbus address: 1−247 addresses selectable in
configuration menu
Conformance
Meets requirements for CE marking:
EMC Directive 2014/30/EU
RoHS Directive 2011/65/EU
WEEE Directive 2012/19/EU
INTRODUCTION
APPLICATIONS
WARNING
Siro-MOD series devices are commonly used to monitor and control:
• indoor air quality in offices, public spaces, meeting rooms and
classrooms
• CO
2
and VOC concentration to regulate demand-controlled
ventilation and to keep the indoor air quality in a good level
COMPANY WITH
MANAGEMENT SYSTEM
CERTIFIED BY DNV GL
= ISO 9001 = ISO 14001 =
RoHS 2
2011/65/EU
