Toxalert GVU-1D - Manual

OPTIONS
CO / CO
2
/ NO
2
/ OR VOC MONITOR MODEL GVU-1
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 solid-
state, low maintenance, cost effective product.
The GVU-1 controller consists of the power supplies, solid state clocks, time delays, and output relays. It can con-
tinuously monitor one of the following Toxalert sensors: GVU-CO carbon monox-
ide sensor, GVU-CO
2
carbon dioxide sensor, GVU-NO
2
nitrogen dioxide sensor or
GVU-VOC diesel smoke/air quality sensor. See last page for ordering informa-
tion. (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.
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 adjust-
able 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 concen-
tration 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 accumu-
lated toxic gases.
FEATURES
GVU-1A
(Control unit w/ integral CO sensor)
• 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 restoration
following power outage if desired.
• User adjustable clock activation of fans, if desired.
• NEMA 1 enclosure standard- others available.
• Audible alarm with silence switch
• Power on indicator
• Fan on indicator
• High gas concentration indicator
U
®
L Underwriters
Laboratories, Inc.
®
LISTED
TOXALERT INTERNATIONAL, INC., P.O. BOX 159, MOUND, MINNESOTA 55364 (952) 472-4541 FAX (952) 472-4960
Visit our website at www. toxalert. com
DATA
SHEET
TM TOXALERT