Ruskin TDFi-RT Manual

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Air Quality Solutions
Installation and Maintenance Manual
Model: TDFi-RT
Fan Inlet Airflow and Temperature Measurement Station
Electronic Thermal Dispersion Sensing Technology
ALL STATED SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT PRIOR NOTICE OR OBLIGATION

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Contents
APPLICATIONS.............................................................................................................................3
CONFIGURATIONS........................................................................................................................4
INSTALLATION ............................................................................................................................. 7
IDENTIFYING LOCATION TO MOUNT HOST MONITOR BOX (REMOTE OR LOCAL HOST) .............10
LOCATING THE BOOM ARM AND SENSOR ON THE FAN INLET ...................................................10
CONNECTING THE SENSOR CABLE ASSEMBLY TO THE HOST OR CLIENT MONITOR BOX........... 13
WIRING...................................................................................................................................... 13
WIRING CONNECTIONS..............................................................................................................14
HOST AND REMOTE HOST MONITOR BOX ................................................................................ 15
HOST AND REMOTE HOST MONITOR BOX FEATURES................................................................ 15
CLIENT MONITOR BOX FEATURES.............................................................................................. 16
Configure Settings At Power-Up (if not already configured or Factory Default was performed) .................................... 17
Resetting Factory Default Fan Configurations - Supervisor Menu .................................................................................18
FAN CALIBRATION PROCEDURES................................................................................................ 19
For Single Fan or Fans of Various Diameters .................................................................................................................19
For Fan Arrays of Same Diameter..................................................................................................................................20
TROUBLESHOOTING .................................................................................................................. 22
MAINTENANCE .......................................................................................................................... 26
REPAIR INFORMATION ............................................................................................................... 26

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APPLICATIONS
The Ruskin model TDFi-RT (Thermal Dispersion Fan inlet – Real Time) fan inlet airflow measuring system uses thermal dispersion
technology to measure and average the airflow velocity and temperature from fan inlet sensors mounted on the fan inlet bell, providing
accurate and repeatable airflow measurement from 0 to 10,000 fpm (0 to 50.8 mps) within ±3% accuracy. The TDFi-RT sensing probes
can be installed in retrofit applications or specified on new construction projects.
The factory-assembled TDFi-RT system includes the HOST monitor box, CLIENT monitor box(es) as applicable based on the system
configuration, sensor Boom Arm assemblies, and communication cable(s) which are connected to each CLIENT box.
Each fan inlet sensor measures flow and temperature, sending this information to a Host or Client monitor box which provides airflow and
air temperature information on an LCD screen. The HOST sends the average flow and average temperature of all sensors and fans to the
BAS through two analog outputs (4-20mA or 2-10VDC) or for each fan through BACnet MS/TP protocol.
The TDFi-RT provides effective airflow measuring on individual fans, fans of differing diameters, and fan arrays when installed in accordance
with the information contained in this manual. Acceptable fan types include Centrifugal, Plenum, and Axial.
TDFi-RT Advanced Thermal Dispersion Fan Inlet
Airflow & Temperature Measuring Station
Installation Instructions
Refer to the Ruskin.com website for the most up-to-date version of this document.
HOST Monitor Box CLIENT Monitor Box
M8 Connection for Sensor Cable
Assemblies on each Monitor Box.
NOTE: As the Remote Host boxes will
not have Sensor Cable Assemblies
connected, M8 connectors will come
with a protective cap to cover the
openings.
Communication Cable (Power/Data)
NOTE: Quantity shipped is based on number
of Client Monitor Boxes required per system.
Sensor Cable Assemblies
NOTE: Quantity shipped is based on
Customer’s selection of 1 or 2 sensors per fan.

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The unique design of the TDFi-RT ensures minimal pressure drop by using less hardware across the fan inlet. The TDFi-RT’s principle of
operation is to monitor the airflow using either one or two thermal dispersion sensors at a location in the fan’s inlet where the air entering
velocity through the fan changes as the fan speed increases or decreases. While the TDFi-RT will display an airflow when initially installed,
it is critical that the calibration process be completed using actual system airflows which will then automatically compensate for slight
differences in installation locations, different fan types, and installed system effects.
Upon completion of the calibration process, the TDFi-RT will accurately display and track airflow throughout the fan’s complete range of
operating airflows.
NORTH AMERICAN EMISSIONS COMPLIANCE
United States
This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when this equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with
the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely
to cause harmful interference, in which case the user will be required to correct the interference at his/her own expense.
Canada
This Class (A) digital apparatus meets all the requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil
numérique de la Classe (A) respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
CONFIGURATIONS
Shown below are a few examples of typical installations with the various components of the system called out. Each TDFi-RT can be
configured for installation on up to 16 fans, utilizing 1 or 2 sensors per fan. Each configuration example below displays 2 sensors per fan.
IMPORTANT: It is critical that the calibration process be completed using actual system airflows
IMPORTANT!
The HOST must be located external to the air
stream. The interface must be accessible during
normal operation & field calibration.
CONFIGURATION:
1 FAN / 2 SENSORS PER FAN I&M: Figure 1
* (2) Sensor Cable Assemblies per Fan
(25’ lengths is Standard)

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IMPORTANT!
The Remote HOST must be located external to
the air stream. The interface must be
accessible during normal operation & field
calibration.
IMPORTANT!
The HOST must be located external to
the air stream. The interface must be
accessible during normal operation &
field calibration.
* (2) Sensor Cable Assemblies
per Fan (10 ft or 25 ft options)
10 ft Standard
** Remote Host Power/Data
Cable Assemblies
(10’, 25’ & 50’ options)
* (2) Sensor Cable Assemblies per
Fan. 25 ft Standard for HOST; 10 ft or
25 ft options for CLIENT
(10 ft is Standard)
** Client Power/Data
Cable Assembly. 25’ Standard
for HOST-to-CLIENT connection
I&M: Figure 2
I&M: Figure 3
CONFIGURATION:
1 FAN / 2 SENSORS PER FAN
With Remote Host
CONFIGURATION:
2 FAN / 2 SENSORS PER FAN

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IMPORTANT!
The Remote HOST must be located external to
the air stream. The interface must be
accessible during normal operation & field
calibration.
* (2) Sensor Cable Assemblies
per Fan (10 ft or 25 ft options)
10 ft Standard
** Client Power/Data Cable
Assembly. (18 in, 32 in, 44 in,
50 in, 10 ft, and 25 ft options)
*** Remote Host Power/Data
Cable Assemblies
(10 ft, 25 ft, and 50 ft options)
CONFIGURATION:
2 FAN / 2 SENSORS PER FAN
With Remote Host I&M: Figure 4
I&M: Figure 5
IMPORTANT!
The HOST must be located
external to the air
stream. The interface must be
accessible during
normal operation & field
calibration.
* (2) Sensor Cable Assemblies
per Fan. 25 ft Standard for
HOST; 10 ft or 25 ft options for
CLIENT (10 ft is Standard)
** Client Power/Data Cable
Assembly. 25 ft Standard for
HOST-to-CLIENT connection
*** Client Power/Data
Cable Assembly.
(18 in, 32 in, 44 in, 50 in,
10 ft, and 25 ft options)

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After the installation described in this document is complete, please refer to the TDFi-RT Technical Bulletin for information regarding
configuration options.
The Technical Bulletin document can be viewed or downloaded at this location: http://www.ruskin.com/model/tdfi-rt
The Technical Bulletin document can also be viewed via the QR code shown below:
INSTALLATION
Warning: Risk of Electric Shock Disconnect power supply before making electrical connections. Contact with components
carrying hazardous voltage can cause electrical shock and may result in severe personal injury or death.
Only a qualified service technician should install this system. To avoid unsatisfactory operation or damage to the product, strictly follow
the instructions provided and do not substitute parts. Damage to the product resulting from not following the instructions or using
unauthorized parts may be excluded from the manufacturer’s warranty coverage.
IMPORTANT: In addition to these instructions, the installation contractor shall comply with all local and International codes and standards
to ensure proper and safe installation.
Software Configuration Information for Commissioning:
Unpacking the Advanced Thermal Dispersion Fan Inlet Airflow Measuring System
Remove the thermal dispersion sensor cable assemblies, monitor boxes, power/data cabling, and any accessories from the shipping
containers and inspect for damage prior to installation. The contents of each shipping box will satisfy the requirements for each air
measurement station on your order. If the components necessary for one air measurement station of your order can not safely be placed
into a single shipping box, an additional box(es) will be included with all boxes for a single air measurement station banded together at
the factory to simplify the process of receipt inspection.
Note: care should be taken to keep all Host monitors, Client monitors, and sensor cable assemblies for each system together, especially
if there are multiple air measurement stations.
I&M: Figure 6
* (2) Sensor Cable Assemblies
per Fan (10 ft or 25 ft options)
10 ft Standard
** Client Power/Data
Cable Assemblies.
(18 in, 32 in, 44 in, 50 in,
10 ft, and 25 ft options)
*** Remote Host Power/Data
Cable Assemblies
(10 ft, 25 ft, and 50 ft options)
IMPORTANT!
The Remote HOST must be
located external to the air
stream. The interface must
be accessible during normal
operation & field calibration.
CONFIGURATION:
3 FAN / 2 SENSORS PER FAN
With Remote Host

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REMOTE HOST COMMUNICATIONS CABLE (if REMOTE HOST option is selected and if configuration includes a Client
monitor box.)
1. Available in 10 ft, 25 ft, and 50 ft lengths; 10 ft is Standard.
2. REMOTE HOST communication cable connects the remote host with the nearest Client box; if applicable.
3. REMOTE HOST Monitor box does not include sensor Boom Arm Assemblies. All sensors will be connected to Client monitor boxes.
CLIENT COMMUNICATION CABLE
1. Available in 18”, 30”, 44”, 50”, 10ft, and 25ft lengths; 50” is Standard
2. CLIENT communication cables connect one Client monitor box to another Client monitor box and also from the local HOST monitor
box to the nearest Client monitor box.
3. For applications which include a local HOST monitor box and one or more Client monitor boxes, one 25ft length of power/data
(communication) cable will be provided as Standard to connect the local HOST monitor box to the nearest Client monitor box.
SENSOR CABLE ASSEMBLY (For local HOST or CLIENT Monitor Boxes)
1. Available with 1 or 2 per HOST/CLIENT Monitor Box
2. Available in 10ft or 25ft lengths.
NOTE: Sensor Cable Assemblies for local HOST monitor boxes are provided in 25ft lengths, as Standard.
3. Each sensor cable assembly includes two (2) mounting clamps (Standard)
HOST Monitor Box or REMOTE HOST Monitor Box
The Ruskin TDFi-RT system includes the following standard or
optional components/configurations:

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1. 1 sensor housing assembly per sensor cable assembly.
2. The sensor housing assembly is shipped with the sensor opening positioned properly on the boom arm. However, the sensor housing
can be rotated on the boom arm in the field ± 90° from the factory-set position to ensure the airflow passes directly through the
sensor opening in its final install position.
3. Airflow can pass through either side of the sensor opening.
MONITOR BOX ENCLOSURE
1. Available with NEMA 1 (Standard) or NEMA 4 (Optional)
2. Applies to all REMOTE HOST, HOST, and CLIENT Monitor Boxes
ACCESSORIES
1. Optional - Cord Grips (2)
TRANSFORMER
1. Optional: ZG-X40 (24VAC, 40VA)
2. Optional: IAQ080 (24VAC, 100VA)
SENSOR HOUSING ASSEMBLY

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IDENTIFYING LOCATION TO MOUNT HOST MONITOR BOX (REMOTE OR LOCAL HOST)
Once it is determined that all components are accounted for, the first step is to select the location where the HOST Monitor box (User
Interface) will be mounted. This location must be external to the fan plenum area so that the user interface is easily accessible and viewed
while the fan(s) are in operation. Access doors that would affect airflow through the fan(s) must be closed and all fan guards and safety
guards must be in place during the calibration process while the fan(s) are in operation.
The menu buttons on the HOST Monitor box (User Interface) must be accessible during the setup and calibration process while the fan(s)
are run through their full range of airflows. If the airflow measurement station was supplied with a local HOST monitor box with either
one (1) or two (2) sensor cable assemblies, select a location for the HOST monitor box that is within the length of sensor cable(s) supplied
with the sensor cable assembly. The local HOST will come with sensor cable assembly lengths of 25ft, as Standard.
Unlike a HOST monitor box, a CLIENT monitor box can be installed inside the fan plenum area (in closer proximity to the fans). Depending
on the number of fans and the equipment supplied, the TDFi-RT can be installed with one or two sensors per fan for any number of fans
that make up an array. Use two sensors on a single inlet fan (SWSI) or a dual inlet fan (DWDI). On dual inlet fans (DWDI), only two sensors
are required and are to be mounted on the “non-pulley” side of the fan.
A REMOTE HOST, when supplied with CLIENT box(es) can be installed remotely up to 500ft away and connected to the CLIENT using
a twisted shielded pair network wire suitable for Modbus type networks or use Connect-Air part number W24182P-2306BL with
communications and power in one cable.
LOCATING THE BOOM ARM AND SENSOR ON THE FAN INLET
Inspect the fan inlet opening to ensure no obstructions or irregularities interfere with installation of the sensors. When the TDFi-RT
configuration includes a HOST and CLIENT monitor box(es), the CLIENT monitor box(es) are intended to be installed in the fan plenum
areas and wired to a local or remote HOST monitor box. All monitor boxes (HOST and CLIENT) must be mounted away from VFD drives
and as far as possible from high voltage wiring. Boxes must be mounted on on a solid, secure surface that is free from vibrations.
Mount the boom arm onto the face of the fan (inlet bell/flare) using the vibration dampening loop clamps supplied (two clamps included
per sensor cable assembly). Space the clamps on boom arm according to the table below to minimize to minimize effects of vibration on
the sensor housing assembly.
NOTICE: Locate the local HOST within reach of the sensor cable assembly that is mounted to the fan inlet. Sensor cable assembly
lengths of 25 ft are provided as Standard for the local HOST monitor box.
WARNING
Do NOT install HOST or CLIENT monitor boxes near VFD drives or near high voltage wiring.
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Fan Inlet Diameter (D) 10" up to 22" Above 22"
thru 28"
Above 28"
thru 34"
Above 34"
thru 40"
Above 40"
thru 46"
Above 46"
thru 48"
Minimum / Default
Boom Arm Length (L) 6" 8" 10" 12" 14" 16"
Minimum Clamp Spacing 3" 3" 4" 4" 5" 6"