Franklin Fueling Systems Tank Sentinel (TS-1001, 2001, 504, 508 & 750) Installation - Manual (Page 20)

RISER PIPES & MANHOLES Page 2 - 1 2
2 Riser Pipes & Manholes
CAUTION You must comply with state and local electrical codes as well as the
National Electrical Code when installing the Tank Sentinel
® system.
CAUTION Take precautions to insure that vehicles cannot enter the work area
during installation if the tank site is located where vehicular traffic is possible.
Riser Pipes for Level Probes
The riser pipe and manhole installation for the level probe is shown in Figure 2-1. If
you are installing the Tank Sentinel probe in an existing tank, which is buried, you
must excavate down to the top of the tank. The Tank Sentinel liquid level probe
must be installed in a four inch riser pipe. Riser pipes should be made of 4 inch,
threaded, ANSI schedule 40 pipe, with 4-8 NPT (DN115 BSP 4-11) male threads at
both ends. This method of installation makes it possible to access the level probe
for service or replacement if necessary.
The probe shaft must extend into the riser pipe at least 5 inches (127 mm) to avoid
submerging the head of the probe if a tank is overfilled.
If possible, the level probe should be installed at or near the center of the tank. This
will provide the most accurate volume readings.
Information Required
For each tank installed, you will need the tank manufacturers’ documentation to find
the:
Tank Model Number, Tank Size, Bung Access Location and Sizes, and the
Tank Strapping Table or “Tank Chart”. This data will also be used when the Tank
Sentinel
® system is setup / programmed — Do Not discard this information.
The length of the riser pipe installed will depend on the tank diameter, probe length
and depth at which the tank is buried. From these dimensions, it is possible to
determine a minimum and maximum riser length. The maximum tank diameter and
the overall length of standard Tank Sentinel probes are listed in Table 2-1.
NOTE
Product Codes: T1 = TS-1001, T2 = TS-2001, T4 = TS-504, T7 = TS-750, T8 = TS-508,
none = all products