AIR SYSTEMS CO91-14LAC Manual

OPERATING INSTRUCTIONS AND REPLACEMENT PARTS
Models: CO91-14LAC
AIR SYSTEMS INTERNATIONAL, INC.
829 Juniper Crescent, Chesapeake, Va, 23320
Telephone [phone]
Toll Free 1-800-866-8100
Fax No. [phone]
www.airsystems.com.
e-mail: [email protected]
This manual must be read carefully and followed by all persons who have or will have the responsibility
for using or servicing this equipment. This equipment will perform as designed only if used according
to the instructions. Otherwise it could fail to perform as designed, causing personal injury or death.
WARNING

ITEM # DESCRIPTION PART #
1 CARBON MONOXIDE MONITOR CO-91
2AUDIBLE ALARM ELLS004
3 RED LED MONC004
4 CLEAR LENS ELDS013
5REMOTE ALARM JACK ELJP004
6 REMOTE ALARM JACK COVER ELJP005
7 GREEN LED MONC005
8 PLUG MONC002
9 HOSE CLAMP HOS056
10 AIR SAMPLE HOSE (PER FOOT) HOS004
11 HANSEN 3000 SERIES PLUG QDH3PL2M
12 AIR SAMPLE SOCKET QDCSL4M
13 1/4” STREET TEE BR4TS
14 120 VAC RECESSED PLUG ELJP006
15 AIR SAMPLE INLET QDCSL4M
16 FLOWMETER WL033NS
17 PRESSURE GAUGE GA1560S
18 PRESSURE REGULATOR WL013A
19 RELIEF VALVE VR2125BR
2
The monitor will analyze the air sample and display the CO concentration in parts per million (ppm). The system’s green
“NORMAL” operation light will illuminate and the red “HIGH CO” light will  icker approximately every second when the CO
level is below 10ppm (5ppm Canadian). If the CO concentration level exceeds the alarm set point, the green “NORMAL”
light will turn off, the red “HIGH CO” light will illuminate, the audible alarm will sound, and the remote alarm connections
will energize. Once the CO concentration levels drop below the alarm set point, all alarm indicators will deactivate and the
unit will return to “NORMAL” operation.
Carbon Monoxide Monitor Overview
System Components
Size 2.75”H X 6.57”L X 5.1”W
Weight 2.8 LBS. (1.27kg.)
Case Extruded Aluminum - anodized black
Voltage 115 VAC and/or 9-16 VDC
Shielding Internal RFI/EMI  lters
Fuse 250 VAC/1 amp fast acting
Operating
Temperature
4° to 113° Fahrenheit
(-15.5° to 45° Celcius)
Humidity
Range 10% to 90% relative humidity
Flow
Requirement 50 - 100 cc/min
Display 3 digit LCD
CO concentration
Test Circuit Manually activated
Sensor Type Sealed electrochemical sensor for
Carbon Monoxide
Accuracy +/-1% full scale
Response 90% in 10-15 seconds
Detectable
Range 0-200 ppm CO
Calibration Manual CO zero and span adjustments
Alarm Setting 10 ppm CO (5 ppm - Canadian)
Warning
Signals
Normal operation - Green Light
High CO - Red Light
High CO - Audible Alarm
Low Battery - Amber Light
Warranty 2 years from original date of purchase
Carbon Monoxide Monitor Specications

STEP 1)
Secure a low pressure Grade-D air source, under 150 PSI.
STEP 2)
Attach sample hose to the air sample inlet located on the right side of the case
and to the air source, 125 PSI max.
Note: A sample hose is provided with two ttings so that a set up for a standard
1/4” tting or a retrot for an ambient air pump can be achieved. For an air pump
set up, remove the pressure gauge and install a street tee in to the gauge port.
Screw the socket into the street tee; this is the connection port for the monitor.
Install the quick connect plug on the sample hose and secure with the clamp
provided. See page 4.
STEP 3)
Adjust the regulator pressure to a maximum reading of 20 PSI.
STEP 4)
Adjust the owmeter so the ball hovers between 50 and 100 cc/min.
STEP 5)
Place the “ON/OFF/TEST” switch to the “ON” position. Allow 30 seconds for the
readout to stabilize. If a reading other than “ZERO” is displayed, calibration of the
monitor may be necessary. If the CO concentration level exceeds the alarm set
point, the green “NORMAL” light will turn off, the red “HIGH CO” light will illumi-
nate, the audible alarm will sound, and the remote alarm connections will ener-
gize. Once the CO concentration level drops below the alarm set point, all alarm
indicators will deactivate and the unit will return to “NORMAL” operation.
Air Sample Inlet Lo-
cated On Right Side
Of Case
1/4” Industrial
Interchange Plug
Retro-Fit Kit For
Ambient Air Pump
3
Set-up/Operation

STEP 1
Remove existing gauge from bushing.
STEP 2
Install street tee in bushing. Install colder socket and gauge
in street tee as shown.
STEP 3
Slide hose clamp over end of hose. Slide colder plug onto
hose and crimp hose clamp over colder plug.
STEP 1
Slide hose clamp over end of hose. Slide
1/2” plug onto hose and crimp hose clamp over hose barb.
STEP 2
Install 1/4” plug on Breather BoxTM or other air source to be
tested. Maximum pressure 125 PSI.
4
Universal Air Pump Adapter Kit For CO91-14LAC
Adapter Hose From L.P. Air Source To CO91-14LAC
Pressure Gauge
Colder Socket
Colder Plug
Colder Plug
Hose Barb
Hose Barb
1/4” Plug
Hose Clamp
Hose Clamp
Hose Clamp
Hose
Hose
Street Tee
Bushing
Tee
Hose Clamp

These batteries provide the required continuous bias voltage to the CO sensor and power the monitor in the event of AC
power loss. If AC and DC power are removed for a period of 2 hours or more, a 1 hour restabilization period is required
as eratic readings may occur.
Battery Replacement: Replace 9 volt batteries when the amber “Low Battery” light illuminates. If the monitor is not used
for 90 days, check the 9 volt batteries and replace if necessary.
Filter Housing/Bowls: Periodic cleaning of the polycarbonate bowls may become necessary. Remove the auto drains and
clean the bowls with a mild soapy solution. The auto drains may also be cleaned with a mild soapy solution at this time.
Dry and reinstall into the  lter housing.
Filter Change: The  ltration system consists of  lter change indicators which will gradually change from green to orange
when  lter life is spent.
Note: Air must be  owing through the  lters before the  lter change indicators will function.
Calibration: Monitor calibration should be done monthly or whenever the reading may be questionable. A calibration date
sticker should be af xed for future reference. To obtain an accurate calibration, we recommend the use of Air Systems’
calibration kits.
Part Number:
BBK-10 Canadian calibration kit for CO monitor; 10ppm CO, zero air, regulator and case - 17 liter size.
BBK-20 Calibration kit for CO monitor; 20ppm CO, zero air, regulator and case - 17 liter size.
BBK-20103 Calibration kit for CO monitor; 20ppm CO, zero air, regulator and case - 103 liter size.
DECAL085CD Calibration decal card, contains 14 calibration decals.
To assure sensor accuracy, calibration of monitor is required. If you cannot obtain an accurate calibration, sensor replace-
ment may be necessary. Consult Repair Service Department before ordering.
Part Number:
CO-91NS Replacement CO sensor
CAUTION: Always depressurize the system before performing service.
5
System Maintenance
Monitor Battery Replacement

6
Carbon Monoxide Monitor System Components

ITEM # DESCRIPTION PART #
1 LCD Display MONC703
2 Span Potentiometer MONC702A
3 Alarm Set Point Potentiometer MONC702A
4Zero Potentiometer MONC702
5 Air Sample Inlet Socket MONC001
6 Air Sample Plug MONC002
7 Air Exhaust Port MONC003
8On/Off/Test Switch MONC007
9 Recessed Plug With Fuse Holder MONC020
10 1 Amp Fast Acting Fuse, 5 X 20Mm ELF001
11 15 Pin Socket MONC520
12 Faceplate/Endplate Screw MONC023
13 Main Circuit Board Assembly CO-91PCB
14 Power Supply Board CO-91PSB
15 Sensor Connector (Soldered To PCB) MONC509
16 Battery Box MONC006
17 9 Volt Battery ELB9V
18 Calibration Tool MONC028
19 End Plate CO-91BEP
20 Aluminum Housing CO-91HOU
21 Led Socket MONC009LA
22 Yellow Led MONC008NS
23 Led Socket And Yellow Led CO-91LED
24 PPM/Serial No. Sticker MONC031
25 Battery Box Connector (Soldered To PCB) MONC516
26 Led Connector (Soldered To PCB) MONC511
27 12 VDC Power Socket MONC522
28 12 Volt Power Plug (Optional) ELJP018
29 12 Volt Cable (Order By The Foot) ELCB035
30 CO Sensor CO-91NS
31 CO Sensor Holder MONC810
32 CO Sensor Electrical Leads CO-91SL
33 90° Hose Barb MONC811
7
Carbon Monoxide Monitor System Components

8
Replacement sensors are shipped with a metal spring installed between the electrodes. Do not remove the clip until the
sensor is to be installed into the monitor.
Step 1)
Disconnect all external connections.
Remove CO monitor from the unit.
Step 2)
Remove the four screws from the moni-
tor’s left endplate.
Step 3)
Remove endplate to gain access to the
sensor cup.
Step 4)
Remove sensor from sensor cup and remove leads. Take the new
sensor and remove the metal spring. Reattach leads to the proper
colored terminals on the new sensor. Install new sensor into sensor
cup.
Step 5)
Reassemble monitor and reinstall in unit.
Connect all cables and air sample hose.
Allow monitor to stabilize 30 minutes to 1
hour and recalibrate.
SENSING
(RED)
REFERENCE
(BLUE)
UNUSED
CONTROL
(BLACK)
Sensor Replacement

9
CALIBRATION PROCEDURE
Do not use inert gases to zero the monitor. This will cause premature failure of the sensor.
CO Monitor Zero Adjustment
To zero the monitor, follow the steps below. Zero calibration gas should be used to properly “zero” the monitor
and assure that a valid calibration is achieved. If zero adjustment cannot be made as indicated, sensor replacement may
be necessary. After each monitor adjustment outlined in the steps, allow time for the changes to stabilize.
STEP 1)
Place the “ON/OFF/TEST” switch in the “ON” position.
STEP 8)
Allow digital readout to stabilize approximately 15-30
seconds.
STEP 10)
Turn the regulator off and disconnect the regulator from
the zero gas cylinder.
STEP 2)
Allow 30 seconds for the readout to stabilize. The green
indicator will illuminate.
STEP 3)
Hold the “ON/OFF/TEST” switch in the “TEST” position.
The following will occur:
Audible alarm will sound
Green LED will  ash
Amber Low Battery indicator on monitor will
illuminate
Red LED will be on
This test ensures the circuitry is operable and continuity
to the sensor is proper. Release the switch.
STEP 4)
Remove the air sample inlet tube.
STEP 5)
Install regulator on the zero air cylinder reference gas.
STEP 7)
Attach the clear tubing with the male plug to the air sam-
ple inlet on the monitor.
STEP 6)
Turn the knob on the regulator counterclockwise to allow
the  ow of gas thru the hose. Verify  ow of gas thru the
hose via touch or sound.
STEP 9)
Adjust the “zero” adjustment screw (clockwise to increase
or counterclockwise to decrease) until a reading of “00” is
obtained.
Calibraon Procedure

10
CALIBRATION PROCEDURE
CO Monitor Span Adjustment
Use only 10-20ppm CO gas for calibration. Using a higher concentration may decrease accuracy at lower scale readings.
Note: 10ppm gas must be used to satisfy Canadian calibration requirements.
STEP 1)
Install regulator on the CO calibration gas cylinder.
STEP 3)
Connect the plug to the air sample inlet on the monitor.
STEP 2)
Turn the knob on the regulator counterclockwise to allow
the  ow of gas thru the hose. Verify  ow of gas thru the
hose via touch or sound.
STEP 4)
Allow digital readout to stabilize 15-30 seconds.
STEP 5)
Adjust the “span” adjustment screw (clockwise to in-
crease or counterclockwise to decrease) until the digital
readout reads the same as the concentration (ppm) as
printed on the calibration gas cylinder.
STEP 6)
Turn the regulator off and repeat the “zero” adjustment
procedure. The digital readout should return to a “00”
reading.
The monitor is now calibrated and should be
recalibrated monthly or if accuracy is question-
able. Check local requirements and recalibrate
as required.
Calibraon Procedure

11
Air Systems’ manufactured equipment is warranted to the original user against defects in workmanship or materials under
normal use for one year from the date of purchase. Any part which is determined by Air Systems to be defective in mate-
rial or workmanship will be, as the exclusive remedy, repaired or replaced at Air Systems’ option. This warranty does not
apply to electrical systems or electronic components. Electrical parts are warranted, to the original user, for 90 days from
the date of sale. During the warranty period, electrical components will be repaired or replaced at Air Systems’ option.
NO OTHER WARRANTY, EXPRESSED OR IMPLIED, AS TO DESCRIPTION, QUALITY, MERCHANTABILITY, FIT-
NESS FOR A PARTICULAR PURPOSE, OR ANY OTHER MATTER IS GIVEN BY AIR SYSTEMS IN CONNECTION
HEREWITH. UNDER NO CIRCUMSTANCES SHALL THE SELLER BE LIABLE FOR LOSS OF PROFITS, ANY OTHER
DIRECT OR INDIRECT COSTS, EXPENSES, LOSSES, OR DAMAGES ARISING OUT OF DEFECTS IN, OR FAILURE
OF THE PRODUCT OR ANY PART THEREOF.
The purchaser shall be solely responsible for compliance with all applicable Federal, State and Local OSHA and/or MSHA
requirements. Although Air Systems International believes that its products, if operated and maintained as shipped from
the factory and in accordance with our “operations manual”, conform to OSHA and/or MSHA requirements, there are no
implied or expressed warranties of such compliance extending beyond the limited warranty described herein. Product
designs and speci cations are subject to change without notice. Rev. 2, 12/98
Air leaks are not covered under warranty except when they result from a defective system component, i.e. an on/off valve
or regulator or upon initial delivery due to poor workmanship. Air leaks due to poor delivery or damage will be covered un-
der delivery claims. Minor air leaks are part of routine service and maintenance and are the responsibility of the customer
just as are  lters and oil changes.
Warranty

AIR SYSTEMS INTERNATIONAL, INC.
829 Juniper Crescent, Chesapeake, Va, 23320
Telephone [phone]
Toll Free 1-800-866-8100
Fax No. [phone]
http://www.airsystems.com
e-mail: [email protected]
Printed in the U.S.A. ©Copyright Air Systems International, Inc. 2018 All Rights Reserved
Manual No. MON006
Rev. 6 May 2018