6
Vaporless Manufacturing, Inc.
8700 East Long Mesa Drive, Prescott Valley, Arizona 86314
800-367-0185 928-775-5191 Fax: 928-775-5309
Email: [email protected] Web Site:
www.vaporless.com
15.
Delay Timer Programming
Referring to Table 2, select the volume in the left-hand column which first exceeds the
measured bleed-back. The next four columns indicate the required switch settings. The right-
most column indicates the approximate time delay between pump cycles.
16.
The
Time Delays
shown in Table 2 are the minimum values needed to allow the leak detector
to reset to its leak sense position. Longer delay times are acceptable, however, these longer
delay times will increase the frequency of false alarms due to thermal contraction.
17.
Pump Timer Programming
Referring to Table 1, select the value in the right-hand column (30 or 70 seconds) which
provides enough time for the turbine to repressurize the line from a zero pressure condition.
The column to the left indicates the required switch setting for the selected operating time.
Under normal conditions 30 second setting should be selected. If the line exhibits excessive
bleed-back or extreme thermal contraction, then the 70 second setting may be selected.
18.
Perform Leak Detector 3 GPH Test
This completes the bleed-back measurement procedure and set-up of the ARM Repressure
Module. A 3 GPH test should now be completed.
LEAK DETECTOR TEST AT 3 GPH:
Whether a new installation or the retrofit of an existing installation using VMI Leak Detectors, a
leak test should be performed. This is done to ensure that the VMI Leak Detector is operating
normally and that the selected ARM delay time is long enough for the VMI Leak Detector to return
to its reset position.
The following statements outline a procedure for testing the operation of the VMI Leak Detector.
This procedure assumes the use of the Vaporless Model LDT-890 Leak Detector Tester to perform
this task.
The following procedure assumes no knowledge of the operation of the LDT-890 and therefore
details each step of the process. The operation manual supplied with the LDT-890 provides ad-
ditional information and should be consulted by the technician.
1.
Install LDT-890 Test Unit
If the LDT-890 has not been installed, follow steps 1 through 11 in the procedure outlined
under Measuring System Bleed-Back.
2.
Leak Calibration
With the large beaker (1000 ml) under the LDT-890 discharge hose, set the selector to the
C
ALIBRATE
GPH position. Fuel will begin to flow into the beaker.
3.
The object of the next step is to calibrate the fuel flow from the test unit to the rate of 3 gallons
per hour at 10 psi pressure at the discharge. This specification meets the requirements of the
EPA regarding leak rate testing.
