Siemens RPT User manual

Installation Instructions
Document No. 540-369
November 15, 2006
Remote Pressure Transmitter
Revision: EA Page 1 of 3
Product Description
The Remote Pressure Transmitter (RPT) (Figure 1)
measures the difference in air pressure between a
room and an adjacent space. It sends that
measurement to the Differential Pressure Monitor.
This kit contains:
•Remote Pressure Transmitter and inside
cover assembly
•Outside cover assembly
•One 12-inch airflow tube
•Eight 1-1/4 inch tamper-resistant screws
•Four wall anchors
•Two removable wire connectors
AIRFLOW TUBE
SEN0179R2
INSIDE
COVER PLATE
OUTSIDE
COVER PLATE
Figure 1. Remote Pressure Transmitter (RPT).
Product Numbers
547-003
Warning/Caution Notations
CAUTION: Equipment damage or loss of
data may occur if the user does
not follow procedure as
specified.
Required Tools
•Small flat-blade screwdriver
•5/64-inch Allen key wrench
•Wire strippers
•Electric drill
•2-inch hole saw
•1/4-inch drill bit
•Plastic tube cutter, pipe cutter, or hacksaw
•Level
•Tape measure
•Volt-ohm meter
Expected Installation Time
15 minutes
Prerequisites
•Electrical box and plaster ring in place
•24 Vac Power cable in place
•Pressure signal cable in place
CAUTION:
Do not apply 24 Vac power until the
installation is fully completed. If power is
applied and one of the heat sinks makes
contact with the electrical box, damage will
occur to the RPT.
Ratings
•Power input: 24 Vac, 2.5 VA
•Pressure signal: standard RS485

Document No. 540-369
Installation Instructions
December 15, 2004
Instructions
1. Verify that the electrical box, onto which the front
part of the RPT will be mounted, is grounded.
NOTE: In Steps 2 through 5, you will determine
where, on the outside wall, to drill a 2-
inch hole. You will use the outside
cover plate on the inside wall to make
offset measurements from the door
frame to the air inlet and then transfer
these measurements to the outside
wall.
2. Temporarily mount the outside cover plate onto
the electrical box in the inside wall, with the
outside cover plate oriented so that the Siemens
Building Technologies logo is at the bottom.
CAUTION:
For the RPT to function properly, the
airflow tube that connects the front and
rear cover plates must be level. Since the
next two steps determine the location of
the rear cover plate on the outside wall,
they are critical to the accurate operation
of the RPT.
3. On the inside wall, measure the distances from
the middle hole in the outside cover plate’s air
inlet to the floor and the door frame, as shown in
Figure 2, and then remove the outside cover
plate from the inside wall.
CAUTION:
If the floors inside and outside the room
are at a different level, be sure to account
for this difference in Step 4.
NOTE: The location indicated in Figure 2 is the
CDC’s (Center for Disease Control)
recommended mounting location. If the
specified mounting location is not
feasable, select another location
approved by the owner.
6-18"
(15.25 - 45.7cm)
6-18"
(15.25 - 45.7cm)
NOTE: POSITION SO THAT
SIEMENS LOGO IS AT
THE BOTTOM
(UPSIDE DOWN)
SEN0180R2
S
Figure 2. Measuring Distances on Inside Wall.
4. On the outside wall, mark off the distances from
the floor and the doorframe and locate the point
of intersection.
5. At the intersection point, drill a 2-inch diameter
hole in the outside wall. Take care to use the
intersection point as the exact center to ensure
the new hole will be completely concealed by
the outside cover plate.
6. Be sure the airflow tube is clear of debris and
then press it onto the black plastic mount on the
RPT circuit board, as far as it will go.
7. Temporarily attach the inside cover assembly to
the inside wall (oriented with the Siemens
Building Technologies logo at the top) and make
a pencil mark on the airflow tube where it exits
the outside wall. Then remove the inside cover
plate assembly from the inside wall.
8. Cut off the length of tubing that extends beyond
the pencil mark, and then remove any burrs from
the end of the tube. Place the rubber section of
the tubing on the newly cut end.
NOTE: Tubing runs longer than 12 inches will
degrade the signal and cause poor
performance. Do not use tubing longer
than the tubing provided.
9. Connect the pressure signal cable to terminals
1(+, Hot) and 3(−, Common) of the 3-pin
terminal block, then plug it into the receptacle on
the RPT (see Figure 3).
Page 2 of 3 Siemens Building Technologies, Inc.

Document No. 540-369
Installation Instructions
December 15, 2004
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and
models as design improvements are introduced. © 2000 Siemens Building Technologies, Inc.
Siemens Building Technologies, Inc.
1000 Deerfield Parkway
Buffalo Grove, IL 60089-4513
U.S.A.
Your feedback is important to us. If you have
comments about this document, please send
them to [email protected]
11. Again, with the inside cover plate assembly
oriented so that its Siemens Building
Technologies logo is at the top; temporarily
attach the inside cover plate assembly to the
plaster ring of the electrical box.
10. Connect the power cable to pins 1(+) and 2(−) of
the 2-pin terminal block, and then plug it into the
power receptacle on the RPT (see Figure 3).
CAUTION:
Do not apply 24 Vac power until the
installation is fully completed. If power is
applied and one of the heat sinks makes
contact with the electrical box, damage will
occur to the RPT.
12. Level the top edge of the inside cover plate to
within ±2 degrees of horizontal. This is critical to
the performance of the RPT; if it is not level,
airflow within the sensor can be altered, leading
to inaccurate readings.
13. With the inside cover plate assembly held level,
tighten the four screws securely.
14. From outside the room, and with the outside
cover plate oriented so that the Siemens
Building Technologies logo is at the top, gently
push the foam rubber sleeve of the outside
cover plate assembly onto the end of the flow
tube.
+ -
1 2 3
+-
24V TRUNK
PIN #1
PIN #1
PRESSURE SIGNAL
TO DPM
SEN0183R1
15. In the center of each screw hole in the outside
cover plate, make a pencil mark on the wall.
16. Remove the outside cover plate, locate the four
pencil marks and then install the four wall
anchors.
17. Reposition the outside cover plate assembly as
in Step 14 and secure it to the wall using the
four remaining screws.
The installation is now complete.
Figure 3. Wiring Connections. .
Document No. 540-369
Printed in the U.S.A.
Page 3 of 3