TSI Instruments 8691-2 Installation Instructions Manual

MODEL 8691-2

FUME HOOD SENSOR AVERAGING VENTING KIT

INSTALLATION INSTRUCTIONS

This Sensor Averaging Venting Kit can be installed with all TSI Fume Hood Face Velocity Controllers and Face
Velocity Monitors.

Prein stallation

Installation will be substantially easier if the side wall
of the fume hood can be removed prior to Sensor
Venting Kit installation. If the side wall cannot be
removed, there is usually an access panel inside the
fume hood that needs to be removed. This should
allow enough room to maneuver the tubing.

Parts List (Figure 1)

 One T-fitting Assembly w/sensor housing
 20 ft.1½" ID Tubing
 One extra-long sensor cable
 Two mounting flanges (black)
 One bag with:

 One O-ring
 Four screws
 Four clamps
 Two brackets
 Two self-tapping nuts

Step 4: Mount the MOUNTING FLANGE to the

MOUNTING PLATE using 2 #8-32 x 5/8 inch

screws (Figure 3).

WARNING

Both sides of tubing must be of equal length
(Figure 4).

Step 5: Cut tubing to fit between the MOUNTING

FLANGE and the T FITTING. Slide 2 hose
clamps onto tubing. Remove the T FITTING
and insert one end of tubing onto the T
FITTING. Push other end of tubing onto
mounting flange. Secure tubing by tightening
hose clamps.

Step 6: Repeat Step 2 through Step 5 on the other

side of the hood.

Step 7: Loosely push T FITTING onto the SENSOR

ASSEMBLY.

Ins tallation

Step 1: Select location of SENSOR ASSEMBLY,

typically lying on top of the fume hood
(Figure 4). SENSOR ASSEMBLY must be
located to reference room air, within 15 ft of
the controller. If using an existing velocity
sensor, make sure to use O-ring to seal the
side-wall sensor to the sensor housing and
tighten down self-tapping nuts using the two
posts on the sensor housing.

Step 2: Determine MOUNTING FLANGE location. Use

Figure 2 as a guide.

Step 3: Drill 1½” hole through the fume hood liner at

this location

Figure 1: Parts

Figure 2: Mounting Flange Location

Figure 3: Finished Assembly

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Figure 4: Typical Installation

Sen so r Assembly

If the Averaging Fume Hood Vent Kit is added to an existing fume hood controller, then the sensor assembly
must be assembled.

Step 1: Open the Sensor Assembly Box, and screw the Sensor in.

Step 2: Close the Sensor Assembly Box. Screw the box together, using the #4-40 screw provided.

This concludes the installation of the Fume Hood Sensor Venting Kit. If you have questions, please call TSI at
[phone] or 1-800-874-2811.

TSI Incorporated – Visit our website www.tsi.com for more information.

P/N 1980334 Rev. F ©2014 TSI Incorporated Printed in U.S.A.