Toxalert GVU-3 Manuel d'utilisateur télécharger pdf (Page 3)

2) Connect dry contacts of alarm Kl (TB1-6 and TB1-7) to

alarm device (optional).

3) Connect dry contacts of fan relay K2 (TB1-4 and TB1 5)

to fan pilot control.

4) Set control unit power switch S1 to the off position,TST/

OPR switch S2 to OPR and OPR/RST switch S3 to RST.

5) Turn on control unit AC power source, but do not

apply power to fans at this time.

3. BURN-IN

Burn-in period allows sensor to stabilize before proceeding

with alarm setting procedure.

1) Be sure fan power is off, power is applied to control

unit and power switch S1 is set to PWR ON.

2) Allow system with CO/VOC sensors to burn-in at least 72

hours with power turned on to sensors.

Allow CO

/ NO

sensors 1 hour to burn-in.

3) When 72 hour burn-in is complete, proceed with

alarm setting and checkout.

4. SETTING OF TIMING FUNCTIONS:

There are two (2) eight position dip switches in the upper right

hand corner of the GVU-1 controller board, labeled S4 and S5.

These control the system’s timing functions.

A) Hourly Operations (S4)

S4 and Toggle switch S3, in the upper left corner of the P.C.

board control the hourly operation of K-2 relay. With number

“1” switch of S4 in the up position, the fan will run one

minute each hour; with the number “2” switch in the up

position, system will run 2 minutes every hour: and so on, up

to eight (8) minutes. The switches are not additive and if more

than one switch of S4 is in the up position, the system operates

the lowest number of minutes of the S4 switches in the up

position. With S3 in RST (reset) position the hourly function is

deactivated. If S3 is in the OPR position and all S4 switches

are down (off), K2 will operate 8 minutes each hour.

B) Minimum Fan Run Time (S5)

Dip switch S5 controls the minimum time K2 relay is activated

once an alarm condition has been acknowledged by the control-

ler. With number “1” switch of S5 in the up position, the

minimum run time (K2 relay closed) is one minute. With

number “2” switch of S5 in the up position, the minimum run

time is 2 minutes, and so on, up to 8 minutes. The switches are

not additive, and if more than one switch is in the up position,

K2 operates the number of minutes of the “lowest” numbered

switch of S5 in the up position. If all are in the down position,

the minimum run time defaults to 8 minutes.

CONTROL UNIT

1) Unlock and open enclosure cover.

2) If necessary, cut access holes for wiring in enclosure

sides directly opposite terminal blocks to be wired. First

disconnect fuse leads, remove the four screws that secure

chassis plate to enclosure and then care fully remove plate

and attached transformer and circuit boards; cut holes and

remove metal chips and burrs from enclosure.

3) Mount enclosure with four screws.

4) Reinstall and secure chassis plate to enclosure with the

four screws and reconnect fuse leads removed in step (2).

5) Connect to 120 VAC, 60 Hz power source.

SENSOR WIRING

NOTE: Refer to Figures 2 and 3 and Tables 1 and 2. Use

shielded cable to interconnect sensors and control units if

metal conduit is not used, or if conduit also contains AC

wiring.

1) Measure distance between sensing unit and controller unit

and select proper size wire or larger wire from Table 1.

2) Run wiring between controller and sensing units and into

enclosure through access holes. Connect wires from

terminal blocks in sensing unit to appropriate sensor #

terminal (TB-1 of GVU-3 expansion board) in control unit

per Figure 2 and/or 3.

TABLE 1

AW G DO NOT EXCEED

#20 Wire 800 Ft. Sensor to Controller

#18 Wire 1300 Ft. Sensor to Controller

#16 Wire 2000 Ft. Sensor to Controller

POWER AND RELAY WIRING

WARNING: To prevent fire or shock hazard turn off

control unit and fan power sources before making

connections to control unit. Comply with all local building

codes and ordinances.

1) Connect power to TB1 of GVU-1, version II board as

follows:

AC hot to TB1-1 (ACM)

AC neutral to TB1-2 (ACN)

AC ground to TB1-3 (KG)

CAUTION:

Relays K1 and K2 are rated for a 5.0 amps resistive

load. If a higher rated alarm or pilot control is required, add a

remote relay between the control relay and load.

TABLE 2 (Refers to Figures 2 and 3)

CO SENSOR TERMINALS GVU-3 SENSOR EXPANSION BOARD TERMINALS C02 / N02 SENSOR TERMINALS

Sensor #l Sensor #2 Sensor #3 Function

1A7B7C7 (+ 12 VDC Power) Normally open relay terminal

2A6B6C6 (Sensor Power Loss) NA

4A1B1C1 (Alarm Input) Normally open relay terminal

5A4B4C4(Ground) NA

No Connection* A5 B5 C5 (Cable Shield) No Connection*

NA TB3-Hot (24 VAC Power) VAC (+)

NA TB3-Neutral (24 VAC Power) VAC (–)

TOXALERT INTERNATIONAL, INC., P.O. BOX 159, MOUND, MINNESOTA 55364 (952) 472-4541 FAX (952) 472-4960

Visit our website at www. toxalert. com

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Toxalert GVU-3 Manuel d'utilisateur Page 3

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