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Section 4 

Operation Basics 

 

Digital Display 

 

The three-digit display represents the real time vacuum pressure in inches of 

mercury (inHg). Minimum vacuum equals 00.0 and the maximum vacuum 

reading, depending on altitude, is approximately 30.9 inHg. 

LED Indicators 

 

The VAS - 4 has four LED indicators; High, Low, Latch and Polarity. See 

Fig. 1 for their locations. 

High LED Indicator 

 

This LED indicates that the vacuum pressure exceeds the preset High Alarm 

set point. 

NOTE: This indicator is real time, i.e., it does not wait for the delay timer to 

time out. 

 

Low LED Indicator 

 

This LED indicates that the vacuum pressure is below the preset Low Alarm 

set point. This LED indicator is also real time. 

Latch LED Indicator 

 

When either the high or low indicators are active, this starts the delay timer. 

If the alarm is active longer than the preset delay time, then the latch LED 

indicator will become active. This indicator stays active until the manual reset 

button (see Fig. 2) is pushed. This indicator implies that either an alarm has 

occurred  or  is  still  active.  If  the  latch  indicator  is  on  and  the  High/Low 

indicators are off, then an alarm condition has occurred, but is not active now. 

If either the High or Low indicators are active, then this represents that the 

alarm condition is still active. 

NOTE: 

The High or Low alarm relays do not become active until the latch 

alarm indicator is on. 

Polarity LED Indicator 

 

When  this  LED  is  on  this  indicates  that  the  VAS  -  4  is  measuring 

pressure. The digital display shows this pressure measurement in inches 

of mercury (inHg).   (1 inHg = 0.49 psi) 

Summary of Contents for Superior VAS-4

Page 1: ...l Revision 0 01 July 2020 Chemical Injection Technologies Inc 835 Edwards Road Fort Pierce FL 34982 Tel 772 461 0666 Fax 772 460 1847 Superior chlorinators com www chlorinators com Bulletin 4018 Pub N...

Page 2: ...ening Unit 5 Enclosure Mounting 5 Installing Vacuum Hose 6 Installing Power Alarms 6 Section 6 Set Up and Calibration 6 Delay Timer Adjustment 6 Low Level Adjustment 7 High Level Adjustment 7 Alternat...

Page 3: ...timer The enclosure has a NEMA 4X rating therefore it can be mounted outside Applications include loss of chlorinating in water and wastewater treatment pool pump monitoring automotive test equipment...

Page 4: ...0 to 30 inHg Low Alarm Range 0 to 15 inHg High Alarm Range 15 to 30 inHg Over Pressure 50 PSI Delay Timer 1 to 100 sec Analog output Voltage 0 to 3 VDC Current 0 to 3 ma DC Reset Switch IP 65 protecti...

Page 5: ...ime Latch LED Indicator When either the high or low indicators are active this starts the delay timer If the alarm is active longer than the preset delay time then the latch LED indicator will become...

Page 6: ...Latch Alarm Relay When either the High or Low Alarm relays become active and the delay time is over the latch alarm relay also becomes active This is indicated by the Latch Alarm indicator This relay...

Page 7: ...ght position the cap over the fitting can be removed The recommended mounting method for the VAS 4 is to use four mounting holes located where the 4 plastic screws are that hold down the lid Usethe bo...

Page 8: ...ikes or other power surges The alarms can be hooked up in many ways Be sure the relay specifications are not exceeded The relay outputs are labeled HIGH ALARM LOW ALARM and LATCH ALARM Remember the la...

Page 9: ...Hg and MAX 30 inches of Hg NOTE If you want to disable the high alarm turn the pot clockwise until it stops Alternate Method for Accurate High Low Level Adjustment If a high degree of accuracy is req...

Page 10: ...looked at from the middle of the board is rotated all the way to the right and the other pot is rotated to approximately the 12 00 position The pot that is close to the 12 00 position is the pot to ad...

Page 11: ...ofollow instructions supplied with the product c Repair or attempted repair by anyone not authorized byTHE MANUFACTURER d Any shipment of the product e Any other causes which do not relate to a produc...

Page 12: ...10...

Page 13: ...11...

Page 14: ...VAS 4 VACUUM MONITORING SYSTEM Chemical Injection Technologies Inc 835 Edwards Road Fort Pierce FL 34982 Tel 772 461 0666 Fax 772 460 1847 Superior chlorinators com www chlorinators com...

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