Labconco Guardian Jr. 4865000 User manual

Guardian™ Jr. Airflow Monitor
Models
Applies primarily to older Models 4865000, 4865001
Some operation and troubleshooting information applies for newer 97432 Series
See separate Instruction Sheets for installation on newer 97432 Series

Copyright © 2018 Labconco Corporation. The information contained in this manual and the accompanying
products are copyrighted and all rights reserved by Labconco Corporation. Labconco Corporation reserves
the right to make periodic design changes without obligation to notify any person or entity of such change.
Returned or Damaged Goods
Do not return goods without the prior authorization from Labconco. Unauthorized returns will not be
accepted. If your shipment was damaged in transit, you must file a claim directly with the freight carrier.
Labconco Corporation and its dealers are not responsible for shipping damages.
The United States Interstate Commerce Commission rules require that claims be filed with the delivery
carrier within fifteen (15) days of delivery.
Limitation of Liability
The disposal and/or emission of substances used in connection with this equipment may be governed by
various federal, state, or local regulations. All users of this equipment are required to become familiar with
any regulations that apply in the user’s area concerning the dumping of waste materials in or upon water,
land, or air and to comply with such regulations. Labconco Corporation is held harmless with respect to
user’s compliance with such regulations.
Contacting Labconco Corporation
If you have questions that are not addressed in this manual, or if you need technical assistance, contact
Labconco’s Customer Service Department or Labconco’s Product Service Department at 1-800-821-5525
or 1-816-333-8811, between the hours of 7:30 a.m. and 5:30 p.m., Central Standard Time.
Part #4861400, Rev. J
ECO L427
Warranty
Labconco Corporation provides a warranty to the original buyer for the repair or replacement of parts and
reasonable labor as a result of normal and proper use of the equipment with compatible chemicals. Broken
glassware and maintenance items, such as filters, gaskets, light bulbs, finishes and lubrication are not
warranted. Excluded from warranty are products with improper installation, erratic electrical or utility supply,
unauthorized repair and products used with incompatible chemicals.
The warranty for Guardian™ Jr. Airflow Monitors will expire one year from date of installation or two years
from date of shipment from Labconco, whichever is sooner. Warranty is non-transferable and only applies to
the owner (organization) of record.
Buyer is exclusively responsible for the set-up, installation, verification, decontamination or calibration of
equipment. This limited warranty covers parts and labor, but not transportation and insurance charges. If the
failure is determined to be covered under this warranty, the dealer or Labconco Corporation will authorize
repair or replacement of all defective parts to restore the unit to operation. Repairs may be completed by 3rd
party service agents approved by Labconco Corporation. Labconco Corporation reserves the rights to limit this
warranty based on a service agent’s travel, working hours, the site’s entry restrictions and unobstructed access
to serviceable components of the product.
Under no circumstances shall Labconco Corporation be liable for indirect, consequential, or special damages
of any kind. This warranty is exclusive and in lieu of all other warranties whether oral, or implied.

T
TA AB BL LE E O OF F C CO ON NT TE EN NT TS S
CHAPTER 1: INTRODUCTION 1
Components Shipped 1
General Description 2
Performance 3
Component Identification 4
CHAPTER 2: INSTALLATION 5
Alarm Module 5
Power Supply Module 6
Electrical Connections 6
Protector Hoods 7
8 Foot, 230V Hoods with External Blower 7
Basic 47 and 70 Fume Hoods 7
Perchloric Acid Hoods 8
Radioisotope Hoods 8
Initial Adjustment Setup 9
Installation Drawings 10
CHAPTER 3: NORMAL OPERATIONS 12
Alarm Activation 12
Alarm Test 12
CHAPTER 4: ELECTRICAL WIRING DIAGRAMS 13
Remote Blower Hoods 115V 13
8' Remote Blower Hoods 117V 14
8' External Blower Hoods 230V 15
4'-5'-6' Integral Blower Hoods 115V 16
Integral Blower Hoods 230V/50Hz 17
Basic 47 & 70 Hoods 115V 18
Basic 47 & 70 Hoods 230V 19
Perchloric Acid Hoods 20
Radioisotope Hoods 21
CHAPTER 5: TROUBLESHOOTING 22

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Thank you for displaying confidence in us by selecting a Labconco Guardian Jr.
Airflow Monitor. Our design engineers, assemblers and inspectors have utilized
their skills and years of experience to ensure that the new Guardian Jr. Airflow
Monitor meets our high standards of quality and performance.
Components Shipped
Carefully check the contents of this package for damage that may have occurred
in transit. Do not discard the carton or packing material until all components have
been checked against the following component list and the equipment has been
installed and tested.
As shipped, the carton should contain the following:
Model 4865000 –Guardian Jr. Airflow Monitor –115V 50/60 Hz
Qty
Part Number
Description
1
4854900
Alarm Module
1
4860600
Power Supply Assembly, 115V
2
1885608
Machine Screw 632 x ½ (Black)
1
4854800
Elbow, Tubing Connector
1
1548104
Probe
1
1919200
Velcro Loop, 1" wide
1
1919300
Velcro Hook, 1" wide
1
1344000
Strain Relief
5
1342200
Tie, Cable
1
4861400
Manual, Instruction
1
3605201
Wire, Assembly (White) 50" long
1
4861500
Wire, Assembly Jumper
2
1346800
Base, Wire Tie
2
1342300
Tie, Cable

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Model 4865001 –Guardian Jr. Airflow Monitor –230V 50/60 Hz
Qty
Part Number
Description
1
4854900
Alarm Module
1
4860601
Power Supply Assembly, 230V
2
1885608
Machine Screw 632 x ½ (Black)
1
4854800
Elbow, Tubing Connector
1
1548104
Probe
1
1919200
Velcro Loop, 1" wide
1
1919300
Velcro Hook, 1" wide
1
1344000
Strain Relief
5
1342200
Tie, Cable
1
4861400
Manual, Instruction
1
3605201
Wire, Assembly (White) 50" long
2
1346800
Base, Wire Tie
2
1342300
Tie, Cable
General Description
The Guardian Jr. Airflow Monitor is designed to continuously monitor airflow
through fume hoods. This permanently installed device provides both visual and
audible alarms to alert the user of abnormal airflow conditions. A green light on
the front of the monitor indicates normal flow conditions. When flow conditions
lower than the set point are encountered, a red light is activated along with an
audible alarm.
A test button is provided at the front of the monitor to allow the user to check the
operation of the alarm.

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Performance
The Guardian Jr. Airflow Monitor is designed for operation on all new non-
explosion proof remote and integral style Protector Fume Hoods. It is also set up
for operation for both the new Basic 47 and 70 inch style fume hoods. The
monitor itself is available both as a field installed kit or a factory installed option.

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Component Identification
1.
Air Inlet
A portion of the air coming into the hood passes
through the air inlet and across the flow sensors.
2.
Normal Flow Indicator
This green light indicates normal flow
conditions.
3.
Alarm Indicator
This red light is activated approximately 6
seconds after the low flow set point is reached.
4.
Test/Reset Button
If no alarm is present, this button will cause the
red lamp to light and the audible alarm to sound.
If an alarm is present, the button will silence the
audible alarm.
5.
Adjustment for Alarm
Set Point
This potentiometer is used to set the low flow
indicators for the alarm.
5
1
3
2
4

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Disconnect your fume hood from its electrical service prior to beginning the
installation of your new monitor.
The installation of your monitor is separated into two segments, the alarm module
and the power supply assembly. Installation is as follows:
Alarm Module
1. Remove the right hand corner cover panel from your Protector Fume
Hood. This is achieved by removing the service fixture knobs, if
provided, and then removing the three Phillips head screws retained in the
corner cover. Remove the black outlet cover plate located in the top
electrical position on this panel.
a. If installing the alarm on either the Basic 47 or Basic 70 inch hood,
you would need to remove the right side access panel on the hood
to gain access in removing the blank outlet cover plate.
2. Reinstate the corner cover panel to the hood using the screws that were
removed in Step 1.
3. On the Protector Fume Hoods only, attach the molded rubber elbow
connector directly to the back port connection on the alarm module
assembly.
4. Thread the gray colored power supply lead wire assembly through the
backside of the corner post and out through the electrical cutout in the
corner cover. Attach directly to the connector located on the back of the
power module assembly.
5. Insert the clear tubing (9 ft.) through the backside of the corner post and
out through the electrical cutout in the corner cover. Attach the tubing
directly to the elbow connector, cut to length, NO kinks, (Protector Hood)
or the connector located on the back of the power module assembly.

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6. Locate the alarm module in the electrical cutout in the corner cover or side
panel of your hood, being careful not to pinch either the electrical wiring
or sensor tube. Lock the bottom of the alarm module in place by sliding
the bottom edge of the assembly down over the edge of the cutout. Next,
secure the top of the alarm with the two #6-32 screws. Mounting holes for
these screws are located underneath the black label surrounding the
electrical cutout. Leave the label in place and secure directly through it to
the corner cover.
7. Route the wiring and plastic tubing up the backside of the corner posts and
attach as shown. Refer to Installation Drawings.
NOTE: Make sure to keep the tubing and wiring out of the travel area of
the sash weights.
Power Supply Module
1. Locate the power supply module on the top of the fume hood liner
assembly and use the supplied Velcro strips to secure in place.
2. Drill a 3/8" diameter hole in the hood exhaust collar or blower housing,
depending upon your specific model of fume hood. Refer to Installation
Drawings for exact locations.
3. Insert the velocity probe into the open end of the vinyl tubing and position
the probe in the 3/8" diameter hole drilled in Step 2. Place the end of the
airflow hose with the nozzle inside the hose near the exhaust duct as
the nozzle helps regulate airflow properly. RTV the probe in position
to complete your installation.
4. Locate caution label directly above the alarm on the appropriate corner
cover.
Electrical Connections
1. Note the separate green wire that is routed with the low voltage power
supply lead wires (gray colored cable) that come from the power supply
module. Route the separate green wire to the outlet box on the hood that
powers the hood lighting fixtures. Route the green wire noted above into
the rear connector on this outlet box and connect to a secure earth screw
inside the outlet box. This green wire provides earth ground to the alarm
module to make it less susceptible to electrical noise created by the
fluorescent lights.
2. Route the power supply module AC voltage lead wires (black and white
wires) down between the fume hood liner and outside wall to the back of
the header panel. On standard Protector Fume Hoods, run this wiring
inside the header panel through the access hole provided in the right side
corner post. Remove the header panel cover plate to gain access for
specific wiring connections. Instructions for wiring connections for each
style of hood is as follows:

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Protector Hoods
115 Volt: Locate the black wire, which connects from the incoming AC
power (in the junction box) to the hood light switch. Disconnect this black
wire from the light switch terminal and connect the solid black wire in
wiring harness #48610. This black wire will have two extra terminals
attached –one of these terminals should be reconnected to the light switch
terminal. The other terminal should be connected to the unused blower
switch terminal located near the center of the blower switch. Next,
connect the black/white wire, which is a part of harness #48610 to the
remaining blower switch terminal. The final wiring step involves the
white wire, which is part of #48610. Locate the white wire that connects
to the fluorescent lamps and find the point where it connects, via
removable terminals, to the white wire from the junction box. Disconnect
the removable terminal and use the white wire (part of #48610) to
reconnect the white wires. The other attached white wire provides a
connection to the air monitor power supply module.
230 Volt: Locate the black wire, which is connected to the hood blower
switch. Disconnect this black wire from the blower switch terminal and
connect to the blue wire of #48611 using the attached terminal. Reconnect
the remaining terminal of the blue wire (part of #48611) to the original
blower switch terminal. Locate the white wire on the blower switch,
which is adjacent to the blue wire just connected above. Disconnect this
white wire from the blower switch terminal and connect to the brown wire
in wiring harness #48611. Reconnect the remaining terminal on this
brown wire to the blower switch terminal where the white wire was
originally removed.
8 Foot, 230 Volt Hoods with External Blower
230 Volt: Locate the blue wire, which is connected to the blower switch.
Disconnect this blue wire from the blower switch terminal and connect to
the blue wire in wiring harness #48611 using the attached terminal.
Reconnect the remaining terminal of the blue wire (part #48611) to the
original blower switch terminal. Locate the brown wire on the blower
switch, which is adjacent to the blue wire just connected above.
Disconnect this brown wire form the blower switch terminal and connect
to the brown wire in wiring harness #48611. Reconnect the remaining
terminal on this brown wire to the blower switch terminal where the
brown wire was originally removed.
Basic 47 and 70 Fume Hoods
115 Volt: Locate the black wire, which connects from the incoming AC
power (in junction box) to the hood light switch. Disconnect this black
wire form the light switch terminal and connect to the solid black wire,
which is part of #48610. This black wire will now have two extra
terminals attached –one of these terminals should be reconnected to the
light switch terminal. The other terminal should be connected to the

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unused lower switch terminal located near the center of the blower switch.
Next, connect the black/white wire, which is a part of wiring harness
#48610 to the remaining blower switch terminal. Next connect the white
wire from wiring harness #48610 to the terminal of the supplied white
wire labeled #48616. After this is done, route the stripped end of this
white wire along with the yellow blower switch wires into the hood
junction box. Tie this white wire inside the junction box to the other white
wires from the blower, light, etc., using a wire nut. Insulate the unused
terminal on the white wire of wiring harness #48610 by removing the
terminal, stripping the wire and installing a wire nut.
230 Volt: Locate the black wire, which is connected to the hood blower
switch. Disconnect this black wire from the blower switch terminal and
connect to the blue wire of wiring harness #48611 using the attached
terminal. Reconnect the remaining terminal of the blue wire in harness
#48611 back to the original blower switch terminal location. Locate the
white wire on the hood blower switch, which is adjacent to the blue wire
just connected above. Disconnect this white wire form the blower switch
terminal and connect to the brown wire of harness #48611. Reconnect the
remaining terminal on this brown wire to the blower switch terminal
where the white wire was originally removed.
Perchloric Acid Hoods
Locate the black wire, which is tied to wiring harness #48610. Cut the tie
and discard the black wire, which features 3 terminals, as it is not required.
Locate the white wire in wiring harness #48610. Connect the terminal of
this white wire back to the terminal of the white wire #48616.
After this is done, route the stripped end of this white wire along with the
yellow blower switch wires into the hood junction box. Tie this white
wire inside the junction box to the other white wires from the blower,
light, etc., using a wire nut. Insulate the unused terminal on the white wire
wiring harness #48610 by removing the terminal, stripping the wire and
installing a wire nut.
Locate the yellow wire on the hood blower switch. Remove the yellow
wire from the blower switch and connect the black wire #48615 to the
blower switch terminal where the yellow wire was located. Reconnect the
yellow wire to one of the remaining terminals of the black wire #48615
and connect the black/white wire from #48610 to the final remaining
terminal of the black wire #48615.
Radioisotope Hoods
115 Volt: Locate the black wire, which connects from the incoming AC
power (in the junction box) to the light switch. Disconnect this black wire
from the light switch terminal and connect to the solid black wire, which is

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part of wiring harness #48610. This black wire will have two extra
terminals attached –one of these terminals should be reconnected to the
light switch terminal. The other terminal should be connected to the
unused blower switch terminal located near the center of the blower
switch. Next, connect the black/white wire, which is a part of harness
#48610 to the remaining blower switch terminal. The final wiring step
involves connecting the white wire in the wiring harness #48610 to the
terminal of the supplied white wire labeled #48616. After this is done,
route the stripped end of this white wire along with the yellow blower
switch into the junction box following the same path as the yellow blower
wires. Tie this white wire inside the junction box to the other white wires
from the blower, lights, etc., using a wire nut.
Initial Adjustment/Set-up
Each alarm module and fume hood is unique and needs to be individually
calibrated in the field. The procedure for the adjustment is as follows:
1. Double check the installation to make sure that monitor and power supply
are properly installed.
2. Allow 10 minutes for the monitor to warm up once power has been
connected.
3. Determine the low flow set point for your monitor. This is the value
where the monitor will first indicate a low flow condition. The red light
will be on for this value. Refer to your industrial hygiene officer for the
proper low flow set point.
4. Adjust your fume hood airflow to the low flow set point as been
previously determined.
5. Using a properly calibrated thermoanemometer, determine the velocity
through the face of the fume hood by taking a detailed velocity traverse.
Divide the face area of the fume hood into equal increments. One reading
per square foot of face area is normally recommended for an accurate
traverse. Compute the average velocity for this area.
6. If the red light alarm is on, slowly turn the adjustment screw
counterclockwise until the green light is activated. If the green light is on,
slowly turn the adjustment screw clockwise until the red light comes on.
Slowly turn the adjustment screw back counterclockwise until the green
light is activated. It is important that these adjustments be done in small
increments, at intervals about 10 seconds apart to allow for delayed
reaction of the alarm itself.
7. Readjust the fume hood airflow to its normal levels.
8. Note: If the low airflow volume cannot be adjusted, then a 1/4 to 1/3 of a
turn counterclockwise can be adjusted to set the airflow volume alarm
condition at 20-25% below normal operating levels.

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Alarm Activation
The audio and visual alarm will activate approximately six seconds after an alarm
condition is detected. To temporarily mute the audible alarm, press and release
the test/reset button.
NOTE: After an alarm condition has been detected, the red light will stay on.
The audible alarm will remain muted until airflow returns to normal levels.
Alarm Test
When no alarm is present, the alarm can be tested by pressing the test/reset
button. While the button is pressed, the alarm light and audible alarm will be
activated.

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Chapter 4: Electrical Wiring Diagrams
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Chapter 4: Electrical Wiring Diagrams
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Chapter 4: Electrical Wiring Diagrams
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