Installation
Page 28
MDE-3985L Encore® Installation Manual · May 2006
Connecting Pump/Dispenser Inlet Pipes
Note: Pumps, except in special circumstances, do not have to use shear valves. The following
procedure for a pump is identical to a dispenser, except shear valve may not be used.
Contractor must provide and install pipe unions whether shear valves are used or not.
1
To gain good access during installation of plumbing it may be necessary to temporarily
remove the vertical low hydraulic cabinet brace found in some units. Reinstall this brace after
completing plumbing installation.
For units with shear valve, contractor provided union must be installed on shear valve. See
shear valve manufacturer instructions for proper tightening of union to shear valve. For units
without shear valves, contractor-provided union must be installed on ground stub pipe.
Refer to
Figure 3-13: Dispenser Inlet Piping and Safety Brace
, for additional shear valve
information. Since Ultra-Hi Units require special considerations, be sure to read and
understand shear valve information.
WARNING
Shear valves must be installed correctly.
Improperly or insufficiently anchored shear valves can lead to fire or explosion. Fire/
explosion could result in severe injury or death.
Anchor all shear valves per manufacturers instructions.
NPT pipe threads can at times be difficult to seal during installation or later because of various
conditions such as minor thread damage, contamination, slight thread imperfections, poor
assembly practice and other reasons. Gilbarco has found that although NPT threads can be sealed
normally with a good quality pipe sealant alone (the normal recommendation), many times fewer
issues are created during installation by using a combination of sealant and Teflon pipe tape. The
slight additional expense incurred to apply both will save money for the installer in the long run by
spending less time correcting leakers during installation.
When using Teflon pipe tape, it is extremely important to apply it properly so that no tape stringers
are created to enter the hydraulic system. Tape stringers can cause serious issues with valves,
nozzles and other hydraulic components. Refer to
Appendix: Inlet Pipe Assembly on page 83
for
information on how to properly use Teflon pipe tape and thread sealant to ensure fewer installation
issues and fewer subsequent pump/dispenser problems.
This information and recommendation does not apply to hanging hardware connections. Damage
to aluminum parts of the hanging hardware or dispenser could occur since it is very difficult to
control proper torque tightening because of the thread-assembly friction characteristics of Teflon
tape.
IMPORTANT INFORMATION
Shear valve or other dispenser components can be damaged or broken if improper wrench
technique is used. Installer must use two wrenches so stress is not applied to the shear
portion of valve during tightening.
CAUTION
Summary of Contents for Encore 300 Series
Page 1: ...Encore Installation Manual MDE 3985L...
Page 58: ......
Page 65: ...Dimensions are in inches...
