User's Manual

Pit Installation
12 R900 Wall and Pit MIU Installation and Maintenance Guide
Tools and Materials
Tables 1 and 2 on page 6 shows the recommended tools and materials you need to
successfully install the R900 MIU or replace the MIU’s internal battery.
Site Selection
Installation and operation in moderate temperatures increase reliability and prod-
uct life. See “Environmental Conditions” on page 4.
Follow these guidelines when selecting a location to install the R900 MIU:
• For best results, Neptune recommends selecting a location where there is no
chance that another object can be set over the antenna.
• Avoid installing the MIU behind metal fences or walls.
• Make sure the pit location gives adequate room for installing both the MIU and
the pit antenna.
• For maximum performance, Neptune recommends that pit antennas be
installed above the lid as illustrated in
Figure 10.
• When installing in a high-traffic area, Neptune recommends that the
dome of the antenna be recessed in the pit lid as shown in
Figure 11.
• Recessing the installation reduces the range of the installation.
Figure 10 Antenna Placement for Low Traffic Areas
Some items may not apply to your specific installation or the list may not contain all required tools
or materials.
Always follow your company’s safety practices and installation guidelines when installing an MIU.
Never perform an installation during a lightning storm or under excessively wet conditions.
For maximum performance the flange of the pit antenna needs to be located above the pit lid.