TM
DATA
TOXALERT
CO / CO
/ NO2 / OR VOC MONITOR MODEL GVU-1
2
SHEET
VEHICLE EXHAUST GAS DETECTOR
GENERAL DESCRIPTION:
The GVU-1 ventilation control monitor combines toxic gas sensing and time-based fan control modes in an all solidstate, low maintenance, cost effective product.
The GVU-1 controller consists of the power supplies, solid state clocks, time delays, and output relays. It can continuously monitor one of the following Toxalert sensors: GVU-CO carbon monoxide sensor, GVU-CO
GVU-VOC diesel smoke/air quality sensor. See last page for ordering information. (Please refer to applicable sensor data sheets).
TIME CONTROL:
The systems hourly timeclock outputs to the fan-on relay once per hour causing it
to energize. The on time of the fan-on relay is user adjustable, in one minute
increments from 1 to 8 minutes. The hourly timeclock operates in this manner
irrespective of sensor reading, and may be disabled, if desired. To disable the
hourly clock operation, place switch S3 to RST (RESET) position.
carbon dioxide sensor, GVU-NO2 nitrogen dioxide sensor or
2
VENTILATION CONTROL:
Should a high toxic concentration occur (above user adjustable alarm level), a 30
second delay timer will start. Should the concentration persist through the delay
period, the “alarm” clock is activated. The “on” time of this clock is user adjustable in discrete settings from 1 to 8 minutes and its setting is independent of the
hourly clock setting. Upon activation of the “alarm” clock, the “fan-on” relay
energizes and remains energized until the “alarm clock” times out. Should the
concentration still be above the alarm level, the “fan-on” relay shall remain ON
and the alarm relay shall energize. This condition is maintained until the concentration drops.
In the event of a power failure, the control unit sets itself to an alarm condition
upon power restoration. Thus, fan activation is assured, clearing out any accumulated toxic gases.
FEATURES
• User adjustable alarm setting
• User adjustable minimum fan run time
• User adjustable 2nd stage activation
• Completely solid-state for long life
• Controller LED indicators for high
concentration signal and fan on
• Operating range meets OSHA std. 1910.1000.
• UL listed upon request.
• Automatic fan start-up upon power r estoration
following power outage if desired.
• User adjustable clock activation of fans, if desired.
• NEMA 1 enclosure standard- others available.
OPTIONS
GVU-1A
(Control unit w/ integral CO sensor)
U
® L
Underwriters
Laboratories, Inc. ®
LISTED
• Audible alarm with silence switch
• Power on indicator
TOXALERT INTERNATIONAL, INC., P.O. BOX 159, MOUND, MINNESOTA 55364 (952) 472-4541 FAX (952) 472-4960
Visit our website at www. toxalert. com
• Fan on indicator
• High gas concentration indicator
SPECIFICATIONS
• Automatic fan run upon power restoration
• Input power: 120VAC, 60 Hz, 1A (fused)
• Relay contacts: 24VAC, 2A resistive, 1.5A inductive
• Timers: 30 second delay on
Min. Fan Run Time 1-8 minutes
Hourly Fan Run: 0-8 minutes
INSTALLATION INSTRUCTIONS
1. INTRODUCTION
Your TOXALERT ventilation control system incorporates the latest in solid state technology to give you
maximum reliability and performance. The system
alarm setpoint can be adjusted to activate fans upon
detection of an unsafe gas concentration such as carbon
monoxide, carbon dioxide, diesel smoke. In addition, a
user definable hourly repeat cycle is provided, allowing
time based, as well as concentration based fan activation. In both modes of fan control, the “on “ time is
user adjustable from 1 to 8 minutes in one minute
increments. For optimum performance, install, burn-in,
and check out your TOXALERT system exactly as
instructed. If your TOXALERT can’t be calibrated or
fails checkout, please contact your local representative
or TOXALERT International for servicing.
• Enclosure:
Nema 1 standard, others available
Dimensions: 12”H x 12”W x 4”D
(305mm x 305mm x 102mm)
Finish: Gray enamel
Weight: 8 lbs. (3.6kg)
FIG. 1
2. INSTALLATION
Locate a mounting location for the sensor away from
direct fresh air intakes, exhaust and/or supply fans, and
mount vertically on wall or support column normally 5
to 6 feet above floor (NO2 and CO2 sensor height may
differ per application). Mount GVU-VOC sensor in
ceiling. Refer to figs. 1, 2 and 3, to install and connect
the TOXALERT control unit and sensors as following.
(Please refer to job specific documentation for more
detailed wiring options).
CONTROL UNIT-
1) Unlock and open enclosure cover.
2) If necessary, cut access holes for wiring in enclosure
sides directly opposite terminal block TB2 and
slightly below terminal block TB1. First, remove the
four screws that secure chassis plate to enclosure
and then carefully remove plate and attached circuit
board; cut holes and remove metal chips from enclosure.
3) Mount enclosure with four screws.
4) Reinstall and secure chassis plate to enclosure with
the four screws
FIG. 2
SENSORS- Please refer to applicable sensor data sheets
for mounting directions.
FIG. 3