Neptune R450 User manual
R450™ QUICK INSTALL GUIDE
R450™ Quick Install Guide
1
1 General Instructions
The R450™Meter Interface Unit (MIU) is designed for use with
multiple types of approved encoder registers:
• Neptune ARB®III, IV, V
• ProRead™ and E-Coder®
• Sensus (Invensys) ECR® II, and ECR®III
Before installing a MIU, the encoder register must be correctly
wired and programmed to work with the MIU.
Notes:
• When using a ProRead encoder register (Rev. E or earlier), the
ProRead register must be programmed for three-wire mode.
• If using a new ProRead register (Rev. F or later), Auto Detect
can recognize it, and it does not need to be programmed.
• If using an existing register, make sure all three wires are
connected, and it is programmed in three-wire mode.
To ensure that the ProRead register is programmed for three-
wire mode, use the ProRead programmer and its RF/MIU 6, 8,
or 10 ID TDI format. You can accomplish this using the ProRead
receptacle before removing the receptacle or three bare wires.
2 Safety & Preliminary Checks
Read the following notes before proceeding.
• Verify that you are at the location specified on the Site Work
Order.
• Verify that the site is safe for you and your equipment.
• Notify the customer of your presence, and tell the customer that
you must have access to the water meter.
• Confirm or update the MIU ID number on the Site Work Order.
For greater detailed information and installation
instructions, refer to the R450 MIU Wall and Pit
Installation and Maintenance Guide (Part No.
12857-001).
When installing meters, follow any guidelines
issued by your company in addition to those
given in this guide. Never perform an
installation during a lightning storm or under
excessively wet conditions.
2
3 Pit & Wall Site Selection
R450 Wall MIU
• For best results, Neptune recommends mounting the MIU on
the outside of the building approximately 5 feet above ground.
• The preferred mounting surface for the MIU would be a flat wall,
but the unit can also be mounted to a pipe or wood post if a flat
wall is not available.
• If the MIU is to be installed inside a basement or building,
Neptune highly recommends testing the Received Signal
Strength Indicator (RSSI) reception of various locations inside
the basement prior to finalizing the location. The RSSI is the
strength of the radio signal when it is received by the
R450 Data Collector (R450 DC). See “Activating and Testing
the R450 MIU” on page 14.
• Avoid installing the MIU behind metal fences or walls.
• The maximum cable length between the encoder register and
MIU depends on the register’s manufacturer and model. Refer
to Table 1 on page 3 for maximum cable lengths.
R450 Pit MIU
• For best results, Neptune recommends placing the antenna
through a hole in the pit lid.
• Avoid installing the MIU behind metal fences or walls.
• Make sure there is enough room in the pit for the MIU. Because
the meter position is fixed, the antenna is usually installed off-
center.
• The MIU comes with an attached cable, but in some instances,
additional cable is required. The maximum cable length
between the encoder register and MIU depends on the
register’s manufacturer and model. Refer to Table 1 on page 3
for maximum cable lengths.
Install the MIU in a vertical and upright position.
3
* American Wire Gauge (AWG)
** Meets manufacturer’s published specification for wire
length between encoder and remote receptacle.
4 Preparing the Encoder Register
Read the following notes before proceeding.
If the MIU is connected to a new ProRead encoder register, or
if a three-conductor cable is already connected to a ProRead
encoder register, ensure that the ProRead register is
programmed for three-wire mode using the ProRead
programmer and its RF/MIU 6, 8, or 10 ID TDI format. This can
be accomplished through the ProRead receptacle before
removing the receptacle.
Table 1 Maximum Cable Lengths
Approved
Encoder Register
Maximum
Cable
Length
Wire
Gauge
Neptune ARB III, IV, V 300 feet
(91 meters)
22 AWG*
Neptune ProRead/
E-Coder
500 feet
(152 meters)
22 AWG*
Networked Neptune
ProRead/E-Coder
250 feet
(76 meters)
22 AWG*
Sensus (Invensys) ECR II
ECR III
200 feet
(61 meters)
22 AWG*
• When a ProRead encoder register (Rev. E or
earlier) is used, the ProRead register must be
programmed for three-wire mode. If two Pro-
Read registers are connected to one MIU, the
encoder registers must be programmed in Net-
work Mode: one in RF compound register Hi and
the other in RF compound register Lo.
• If a register is removed, the MIU will revert to a
single register installation and send the Hi side
reading.
4
5 Wiring the Encoder Register
22 American Wire Gauge (AWG) three-conductor cable must be
used from the encoder register to the MIU. Refer to the following
steps.
1 Connect the three-conductor wire to the encoder register’s
terminals per the manufacturer’s instructions.
See Neptune’s Encoder Quick Install Guide,
(Part #: 12572-001), using the color code in Figure 1.
Figure 1 Encoder Wiring
2 Thread the cable around the strain relief posts of the encoder.
3 Apply sealant liberally and ensure that it encapsulates the
terminal screws and exposed wires
.
4 Snap the cover onto the encoder register.
5 Proceed to the section specified for either wall or pit
installation.
Before wiring the encoder register, make sure the
cable is long enough so the pit lid can be removed
easily after the installation. This will prevent
straining the cable.
For more detailed instructions, refer to
Neptune’s Encoder Quick Install Guide
(Part #: 12572-001).
All encoder terminal connections that are not
pre-wired and potted must be covered with
Novagard (G661) or Dow®Corning
Compound 4.
5
6 Installing the R450 Wall MIU
Complete the following steps to install the wall MIU.
1 Remove the main housing
from the mounting adapter.
(The Hi-Lo fastener for
securing the main MIU
housing to the adapter plate
is shipped separately in box.)
Figure 2 Wall MIU Main Housing
2 Study Figure 3 and the loca-
tion requirements, then decide
how to install the MIU and
mount adapter with the set
screw positioned at the
bottom.
Figure 3 Mounting Adapter
For greater detailed information and installation
instructions, refer to the R450 MIU Wall and Pit
Installation and Maintenance Guide
(Part #: 12587-001).
A variety of holes in the mounting adapter allows
for a quick and easy installation.
• The cable enters through the bottom or rear
cable entry of the mounting adapter.
• When the MIU replaces a receptacle, use the
appropriate holes to allow reuse of the
receptacle’s original mounting holes. See
mounting hole configuration in Figure 3.
• When mounting the MIU to a pipe, use the bolt
hole for pipe mounting.
Hi-Lo fastener
Cable
exit
Cable
entry
Pipe clamp
holes
6
3 Connect each individual colored wire from the wall MIU with the
appropriate colored wire from the approved encoder per the
encoder wiring. See Figure 1 on page 4. Repeat this step for
each colored wire.
4 For rear cable entry, store
excess wire and Scotchloks™
in the hollow cavity in the back
of the MIU using the strain
relief guides as shown in
Figure 4.
Figure 4 Back of MIU
5 For bottom cable exit, store
Scotchloks in the hollow cavity
in the back of the MIU. Then,
guide the remaining wire
through the cable exit notch at
the bottom right side of the MIU
as shown in Figure 5.
Figure 5 Cable Exit Notch
When using the Scotchlok gelcaps:
• Pair the wires according to the color chart in Figure 1 on
page 4.
• Connection from the MIU to the approved
encoder should be made using 22AWG
three-conductor wire.
• Neptune requires that you use either type UR
or UY Scotchlok gel caps to connect the
pigtail from the MIU to the register wire.
(Refer to Neptune's Encoder Quick Install
Guide (Part No: 12572-001) for proper
Scotchlok techniques.
Notch
Strain relief
guides
7
• Slide the ends of the pair of colored wires into the gel
caps as far as they can go. Do not strip individual col-
ored wires.
• Then, firmly squeeze the gel cap with the appropriate
crimping tool (Eclipse Tools Part No. 100-008 or Neptune
Part No. 5500-158). One gel cap is used for each col-
ored wire pair. See Figure 6.
Figure 6 Gel Cap Connections
6 Slide the tongue on the top of
the MIU into the groove on the
top of the MIU Mounting
Adapter. See Figure 7.
Figure 7 MIU Back Plate
7 Secure the MIU to the Mount-
ing Adapter using the Hi-Lo
Fastener provided. See
Figure 8.
Figure 8 Hi-Lo Fastener
8 Activate the MIU per the section entitled “Activating and Test-
ing the R450 MIU” on page 14.
8
7 Installing the R450 Pit MIU
Connecting the Antenna
1 Install the housing through the
1 3/4“ hole in the meter pit lid.
Slip the large plastic nut over
the antenna cable and thread
it into the antenna assembly to
secure it to the pit lid. Make
sure the smooth side at top of
the threads on the nut is facing
upward. See Figure 9.
Figure 9 Pit Antenna Cable
and Housing
2 Place the flat black rubber
washer on MIU around the
male coax connection. See
Figure 10.
3 Apply a coating of Nova-
guard around the base of the
“F” connector and on the flat
rubber washer.
4 Connect the coaxial cable
connector to the “F” connec-
tor on the transmitter hous-
ing. Tighten the connector
with a 7/16” wrench to a
torque of approximately 30
in-lbs. See Figure 10.
Figure 10 Coax Connection
•For greater detailed information and installation
instructions refer to the R450 MIU Wall and Pit
Installation and Maintenance Guide (Part No.
12857-001).
• Before wiring the encoder register, make sure
the cable is long enough so that when the
installation is complete, the pit lid (with MIU
attached) can be removed easily without
straining the cable.
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