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