Dwyer RTI - Manual (Page 3)

InSTALLATIOn
page 2 page 3
InSTALLATIOn
Wall Mount. To mount a Series RTI display to the wall, hold the
unit in the desired position, mark the holes in the mounting
feet, drill and mount with screws. With the RTI-W-VPS option
(Built-in 115 VAC power supply), first remove the front cover
to gain access to the mounting screw holes.
A meter-mounted RTI Series can be converted to a wall mount
using an MMK mounting kit offered in our Series FPCA.
Meter Mount. If the Series RTI display was ordered as an -M
model, the housing is made to be directly mounted to the flow
sensor and therefor needs no further installation.
An RTI Series module can be converted from a wall-to a meter-
mount using the WMK adapter kit fouund in Series FPCA that
includes a lower housing and associated hardware. This can
be accomplished as follows:
1) Remove the strain relief through which the flow sensor
cable runs.
2) Cut the cable to about 6” in length. Carefully strip the
cable jacket to expose the three colored wires (red,
white, and black) inside.
3) Route the wires through the threaded connector
pre-installed in the bottom of the housing.
4) Start the threaded connector into the female thread on
the top of the flow sensor. Be sure to match the
oblong shape on the bottom of the housing to the
depression on the top of the flow sensor.
5) Using an ordinary screwdriver inserted in one side of
the slot (see drawing), tighten the screw as much as
possible.
6) Strip the wire ends, make the connections to the
RTI Series display as shown in Connections
Diagrams, and then use the cover screws to attach the
display to the top of the housing.
panel Mount. Using the “Panel Cut out” drawing as a guide,
cut a square hole in the panel. Remove the clamps from the
back of the RTI-P and insert the display unit through the cutout,
taking care that the panel sealing gasket is in place between
the front of the panel and the flange of the display. Hold the
display in place while starting the screw of one of the two
clamps. Finger tighten the screw, then install the other clamp.
When both are in place, firmly tighten the clamps with a small
wrench or nut driver.
Sensor Wires
Sensor Wires
Meter Mount
connections. To connect the Series RTI flow display to a flow
sensor or an external device such as a chemical metering
pump, follow the Standard Connections diagrams on pages
4 thru 6.
If the RTI's 4 to 20 mA current signal is not required, connect
the power terminals to any 12 to 30 VDC voltage source.
Dual Relay Output (Option -DRO). If you purchase the RTI with
option -DRO, the required component will come preinstalled,
and no extra procedures are required.
If you are retrofitting an existing installation of an RTI with the
dual relay board, please follow the instructions below:
1) Peel the backing off of the double-stick tape and affix
it to the bottom of the relay board.
2) Carefully attach the board to the RTI as shown in
the connection diagram on page 5. Be sure that the
red wire faces the “Sensor Input” side of the RTI, and
that the white wire faces the “Pulse Output” side.
3) Connect the white wire to the “Pulse Scaled” positive
terminal, and the red wire to the “Power 4 to 20 mA”
positive terminal.
4) Connect devices to the relays as desired.
Caution: If output is being used to
control an external device, such as a
metering pump, do not connect the de-
vice until programming is completed.
If malfunction or incorrect program-
ming of the output could cause per-
sonal injury or property damage, separate safeguards
must be installed to prevent such injury or damage.
Panel Mount
-DRO Relay board Specifications
Output Voltage 0 to 130 VAC/DC
Output Current (each output)
Temperature
50˚ C 85˚ C
Current Limit 100 mA 50 mA
Max Pulses/Second 5
Contact Time Per Output 100 ms