This product is classified by Underwriters Laboratories, Inc.® for use in throughpenetration firestop systems. See UL fire resistance directory.
Figure 1: Typical Installation
Component List
Part Number Qty Description
801912 1 Pressure sensor
800248 1 Sensor cable
800648 1 8631-CRM Clean Room pressure
monitor
or
800649 1 8631-CRC Clean Room pressure
controller
800420 1 Transformer
800414 1 Transformer cable
1901057 2 Intumescent ring
2923020 1 Fire sealant
Damper versions also have dampers sized to duct
work and:
800370 1 Electric actuator
800199 1 Controller output
cable
MODEL 8631-CRM/8631-CRC PRESSURA™
CLEAN ROOM PRESSURE MONITOR/CONTROLLER
INSTALLATION INSTRUCTIONS
WARNING: The Model 8631-CRM Room Pressure Monitor or Model 8631-CRC Room Pressure Controller
must be wired to 24 VAC only. Wiring the unit to 110 VAC will cause serious damage to the
unit and void the warranty.
The pressure sensor must be mounted through the wall between the controlled space
(isolation room) and referenced space (ante room/hallway).
These installation instructions guide the installer through the installation of the TSI Model 8631-CRM
PresSura™ Room Pressure Monitor or the TSI Model 8631-CRC Room Pressure Controller. The installation
instructions cover all controller versions: electric actuator/damper, pneumatic actuator/damper and variable
frequency drives (Motor). Unless specified otherwise, figures and instructions apply to all three versions.
Please read these instructions thoroughly before beginning installation.
_____________________
TSI and TSI logo are registered trademarks of TSI Incorporated.
PresSura is a trademark of TSI Incorporated.
Pressure Sensor Installation
Figure 2: Pressure Sensor Orientation
and Mounting Template
WARNING: 801912 pressure sensor must be
mounted through the wall between the controlled
space (isolation room) and referenced space
(hallway), exactly as shown in Figure 2 and 3.
Determine pressure sensor location (Figures 1,
2 and 3). Pressure sensor typically mounts in
the reference space, and the dummy housing
mounts in the isolation room.
NOTE: Pressure sensor is not symmetrical. If
sensor is to be centered over hallway door,
measure one inch to the left of center for 2¼”
hole. Dummy sensor will be 2” off center on
other side of wall.
The pressure sensor must be orientated on the
wall as shown in Figure 2. Looking at the
mounted sensor, sensor hole is on the left
(2¼”) and wire hole is on the right.
Drill a 2¼” inch hole through each side of the
wall to accept the sensor tube.
Drill a
7
8” hole on the side of the wall that the
pressure sensor will be mounted. This hole is
for the six-conductor sensor cable. Refer to
Figure 2 for a hole mounting pattern.
Slide sensor cover to right and remove screw
that holds the sensor base to the pressure
sensor (Figure 2). Remove pressure sensor
and store in a safe place.
From the side of the wall the sensor will be
mounted, slide the sensor tube through the wall.
Mark the tube where it is flush with wall. Remove
sensor tube and cut tube 18-inch shorter than
flush marking.
NOTE: If 12” sensor tube needs to be extended,
use same size or larger diameter tube. Drill out
½” sensor hole in dummy case to match ID of
tube extension.
From the side of the wall the sensor will be
mounted, slide the sensor tube through the wall.
Slide the dummy base over the end of the tube.
Screw the pressure sensor base and dummy base
to the wall (Figure 3).
Wire the pressure sensor per Figure 10 or 12.
Run sensor cable to the room pressure controller
4” 4” electrical rough-in box.
Insert fire protection sealant (provided) into
7
8” wire hole to seal.
Install and screw the pressure sensor and
dummy cover onto the bases. Slide covers to the
left to hide the sensor. Finished installation
should look as shown in Figure 4.
WARNING: DO NOT touch the sensor element in
the pressure sensor. DO NOT run wires through
the air passage. Doing so will damage the sensing
element.
p. 2 of 11
Figure 3: Cutaway View of Mounted Pressure Sensor
Figure 4: Pressure Sensor Mounting
Figure 5: Pressure Transducer Mounting
p. 3 of 11
Pressure Transducer Installation
WARNING: 801913 pressure plates must be
mounted in the wall between the controlled space
(clean room) and referenced space (hallway),
exactly as shown in Figure 6 and 7.
Install pressure transducer in desired location
(typically above ceiling). The transducer must be
mounted on a wall in the correct position per
Figure 5 (screws not provided). DO NOT mount
pressure transducer to duct or other vibrating
surface.
Wire the pressure transducer per Figure 11 or 13.
Run sensor cable to the Clean Room Pressure
Controller 4” 4” electrical rough-in box.
Determine pressure sensor location (Figures 1, 6
and 7). Pressure sensor typically mounts in the
reference space, and the plate mounts in the
clean room.
Drill a 2¼-inch hole through each side of the wall
to accept the sensor tube.
Run pneumatic tubing from transducer to sensor
locations. For a positively pressurized space, the
high port should be connected to the controlled
space and the low port to the reference space.
Similarly, for a negatively pressurized space, the
low port should be connected to the controlled
space and the high to the reference space.
Connect the pneumatic tubing to the nipple on
the back side of the pressure plate.
Insert the pressure plate into the hole in the wall.
Screw the pressure plate to the wall. The finished
assembly should look like Figure 6.
Figure 6: Cutaway View of Mounted Pressure Transducer Assembly
Figure 7: Pressure Transducer Mounting
p. 4 of 11
Transformer Installation
Figure 8: Transformer Installation
WARNING
Make sure no power is applied until all
wiring is complete.
Follow all applicable electrical codes,
and have qualified personnel install
the transformer.
NOTE: Each system must be installed
with supplied transformer. If a TSI
transformer is discarded and a central
transformer is installed, a separate
isolation transformer must be installed in
line between the TSI system and central
transformer.
Damper Version—Mount a standard 4” 4” 1½”electrical box at a convenient location within 20 feet of
the damper/actuator.
Motor Version—Mount a standard 4” 4” 1½” electrical box at a convenient location within 20 feet of
pressure controller.
Run 115 Volt, single phase, 60 hertz line voltage (115 VAC) to electrical box. Follow all applicable
electrical codes.
Connect 115 VAC line voltage HOT wire to BLACK wire on transformer and NEUTRAL wire to WHITE wire
on transformer (Figure 5).
Connect the RED wire on 800414 transformer cable to either of the YELLOW wires on the transformer and
the BLACK wire to the remaining YELLOW wire.
Screw the transformer to the electrical box.
Damper Version—Run transformer cable from the transformer electrical box to the damper/actuator box.
Have at least 8 inches of cable coming out of the damper/actuator box before trimming cable to length.
Motor Version—Run transformer cable from the transformer electrical box to the pressure controller.
Have at least 8 inches of cable coming out of the pressure controller rough in electrical box before trimming
cable to length.
p. 5 of 11
Pressure Monitor/Controller Installation
Figure 9: Pressure Controller Mounting
NOTE: Two screws are hidden behind
the cover when full open. The cover will
slide to the right approximately 2 inches
until a stop is hit. Pull cover to
completely remove from electronics and
expose the screws.
Pressure Controller Rough-in
Select the mounting location of the pressure monitor/controller. The construction plans normally show the
mounting location. If no location is specified, then the unit is typically installed as shown in Figure 1.
Alternate mounting locations are nurses’ station, other staff areas, etc.
Install a standard double gang electrical box (4” 4”).
Slide the pressure monitor/controller cover to the right and remove three screws holding the electronics
to the base (Figure 9). Remove base.
Install the base to the 4” 4” electrical box. The base’s “THIS SIDE UP” arrow must be pointing towards
the ceiling.
Pressure Controller Wiring
WARNING: DO NOT connect more than 24 VAC to any terminal.
DO NOT apply voltage to the RS-485 output, analog output, or control output. Severe
damage may occur to the unit if voltage is applied.
Remove the connectors from the back of the pressure controller.
Refer to the wiring diagrams, Monitor Version (Figure 10 or 11) or Damper Versions (Figure 12 or 13) for
proper wiring installation.
If additional options need to be wired, refer to building prints for proper wiring diagram.
Plug the connectors back into the pressure controller.
Carefully push the wires into the electrical box and mount the pressure controller. Install three screws to
hold pressure controller firmly to base. Install cover and slide left to hide display.
p. 6 of 11
WARNING: Monitor must be wired exactly as wire diagram shows. Making modifications to the wiring
may severely damage the unit.
Figure 10: Wiring Diagram – 8631-CRM-S
p. 7 of 11
WARNING: Monitor must be wired exactly as wire diagram shows. Making modifications to the wiring
may severely damage the unit.
Figure 11: Wiring Diagram - 8631-CRM-P
p. 8 of 11
WARNING: Controller must be wired exactly as wire diagram shows. Making modifications to the wiring may
severely damage the unit.
Figure 12: Wiring Diagram - 8631-CRC-S
p. 9 of 11
WARNING: Controller must be wired exactly as wire diagram shows. Making modifications to the wiring may
severely damage the unit.
Figure 13: Wiring Diagram - 8631-CRC-P
p. 10 of 11
USA Tel: +1 800 874 2811
UK Tel: +44 149 4 459200
France Tel: +33 1 41 19 21 99
Germany Tel: +49 241 523030
India Tel: +91 80 67877200
China Tel: +86 10 8219 7688
Singapore Tel: +65 6595 6388
TSI Actuator/Damper Installation
WARNING: Building prints normally determine damper location and mounting configuration. They
supersede the guidelines below.
The actuators are shipped mounted to the damper. No adjustments are needed prior to mounting
the assembly.
The damper must be installed with the damper shaft parallel to the ground (Figure 14).
Slip-fit dampers mount INSIDE the duct work. Flanged dampers bolt to the duct work. No ductwork can be
inside of dampers, or interfere with damper rotation.
Screw slip-fit damper to duct work using 1-inch or shorter screws. Make sure screws do not interfere with
damper blade rotation. Bolt flanged dampers securely to ductwork, but DO NOT “force” damper to fit
(deforms damper).
NOTE: If you need assistance installing the system, call TSI Customer Service at (800) 874-2811.
TSI Incorporated – Visit our website www.tsi.com for more information.
P/N 1980491 Rev. F ©2017 TSI Incorporated Printed in U.S.A.
Figure 14: Proper Damper Mounting
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