Installation Instruction
4
MTU Single Port Pulse Devices Installation Instructions
If a cellular phone signal drops dramatically or indicates no signal at the desired location, it is possible
that the MTU signal will also be blocked at this location. In this case, the MTU will have to be
mounted in a different location, possibly on the outside of the structure.
Keep the MTU away from all other electrical wires.
Make sure screws used to mount the MTU do not damage any wires, cables, or pipes.
N
OTE
Do not mount the MTU under wiring such as Romex, AC power wires, cable TV wire, or telephone
wire. Do not allow these wires to lie on top of, or in front of the MTU.
Outdoor Mounting
MTUs mounted outdoors are typically mounted to the side of buildings, to a stationery post, to the
piping surrounding the meter, or to a pit lid.
If the unit is being mounted to the outside of a building, the MTU will be connected to wires that lead
from the inside to the outside of the building. If existing wire is used, it must be of the same quality as
specified in Wiring the MTU. It must also be in good condition, without breaks, damage, or corrosion.
1. Select a mounting location for the MTU that will allow optimum signal transmission.
2. Mount the MTU on the side of the building. The MTU must be mounted level, vertically with the
Aclara logo facing the installer. Allow a 1" space between the top of the MTU and the overhang of the
siding above it. This is important for proper radio signal transmission.
Indoor Mounting
For indoor mounting, mount the MTU vertically on a basement ceiling joist. It is important to mount
the MTU as high as possible.
N
OTE
The MTU must be mounted above grade.
Because the outside wall of a building can have metal siding or foil insulation, keep the MTU a few
inches away from the outside wall. Transmissions easily pass through wood and masonry.
Do not install an MTU inside if the basement has a metal ceiling or foil-lined insulation in the ceiling
or if it has foil on the sidewalls running from grade to ceiling. This will prevent the signal from
transmitting effectively.
Large metal objects such as heating ducts, steel cabinets or metal ceiling structures can block MTU
transmissions. Select locations that are at least five to ten feet away from objects such as these.