8
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
12.
Leak Test Confirmation
With the dispenser authorized, the turbine will start running. Again, note that with the selector
in the
GPH
T
EST
position a 3 GPH leak has been introduced to the system. Watch the right-hand
pressure gauge as the turbine builds pressure. The pressure should build to the value noted in
Step 10.
TECHNICAL NOTE
— If the pressure indicated on the right-hand pressure gauge does not
stabilize at the lower pressure, but rather steps through to the higher normal operating value,
the leak detector has failed the leak test. Contact the factory for calibration information.
Turn the selector to the
P
RESSURE
S
TEP
T
EST
position. Following a short delay, the pressure should
step up to the value noted in Step 8. This is the indication that the mechanical leak detector has
properly transferred from its leak test position to its full flow position.
13.
Auto-Repressure Test
Remove the dispenser authorization. With the large beaker under the discharge hose, set the
selector to the
D
ISPENSER
N
OZZLE
position. Fuel will flow into the beaker. After the reading on
the right-hand pressure gauge falls to zero, set the selector to the
P
RESSURE
S
TEP
T
EST
position.
14.
Set the ARM-4073 power switch to the O
N
position (refer to Power On-Off Switch). The
turbine will start running. Immediately return to the dispenser. On the right-hand pressure
gauge of the LDT-890, verify that normal operating has been achieved. Set the selector on the
LDT-890 to the
GPH
T
EST
position. This will introduce a 3 GPH leak to the system.
Because
the leak detector has already stepped through to its fully open position, nothing will
change.
This leak must be introduced to the system before the 30 second (or 70 second) pump
timer has completed its timing cycle.
15.
At the end of the pump timing cycle, the ARM-4073 will automatically turn off the turbine.
On the right-hand pressure gauge of the LDT-890, verify that the pressure falls due to the 3
GPH leak. If the proper delay timer has been selected from Table 2, the pressure should fall to
zero before the next automatic pump cycle is started.
16.
At the end of the delay timing cycle, the ARM-4073 will automatically turn on the turbine.
Pressure will begin to build but will stop at the value observed in Step 10 indicating that the
leak detector has found the 3 GPH leak. This successfully completes the ARM-4073 test.
17.
Disconnect LDT-890 Test Unit
Turn off the appropriate power breaker. Turn off the ARM-4073 power switch.
18.
With the large beaker under the LDT-890 discharge hose, set the selector to the
D
ISPENSER
N
OZZLE
position and bleed off fuel until the reading on the right-hand pressure gauge is zero.
19.
Disconnect the quick disconnect coupler attaching the test unit to the whip hose.
20.
Remove the whip hose from the test port and install the original plug. The application of thread
sealing compound to the plug is recommended.
