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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
EMERGENCY SHUT-OFF:
When installing new equipment, it is important to maintain the integrity of the emergency shut-off
system. It is the responsibility of the installer to develop an installation that provides for proper
emergency shut-off function.
•
If the shut-off system breaks power at the mains, voltage will be removed from both the pump
and the ARM-4073. This type of system will not be affected by installation of the module as
shown in Figure 1.
•
If the shut-off only breaks the authorization signal, voltage will not be removed from either the
pump or the ARM-4073. The repressure sequence will not be interrupted. This will result in
unexpected pump operation. To provide a proper shut-off function, the voltage to terminals
L1/K1 on the ARM-4073 must be from a source which is interrupted by the emergency shut-
off system.
POWER ON-OFF SWITCH:
At certain times of the year when the thermal contraction of fuel is not interfering with proper
operation of the distribution system it may be appropriate to disable the repressure module. A
power toggle switch is provided for this purpose. The switch is located next to the L1-L2 terminal
block on the module’s circuit board.
With the lever positioned toward the terminal block, power is applied to the module (on position).
With the lever positioned away from the terminal block, power is removed from the module (off
position). Care should be exercised when operating the switch as voltage may be present on the
L1-L2 terminals.
MEASURING SYSTEM BLEED-BACK:
When under pressure all closed piping systems exhibit an elastic response that will force fuel from
the line if an opening is provided. The volume of fuel forced from the line is dependent on several
factors and must be measured for each installation. The selection of a delay time from Table 2
(page 9) is dependent upon this volume.
The following statements outline a procedure for measuring the expelled volume which is referred
to as
bleed-back
. 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.
Power Off
Turn off the circuit breaker providing power to the product under test. This is done to prevent
the accidental starting of the turbine while the line is open in the following steps.
Turn off the power switch on the ARM-4073. The location and operation of this switch is
described under Power On-Off Switch. The unit is turned off to prevent unexpected starting of
the turbine while the following procedure is being conducted.
