Model 8631-HM-BAC, 8631-HC-BAC PresSura Monitor/Controller

MODEL 8631-HM(-BAC)/8631-HC(-BAC) PRESSURA™
ROOM PRESSURE MONITOR/CONTROLLER
INSTALLATION INSTRUCTIONS
WARNING:
The Model 8631-HM Room Pressure Monitor or Model 8631-HC 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-HM PRESSURA™
Room Pressure Monitor or the TSI Model 8631-HC 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.
This product is classified by Underwriters Laboratories, Inc.® for use in through-penetration
firestop systems. See UL fire resistance directory.
Component List
Part Number
800243
800248
Figure 1: Typical Installation
_____________________
TSI and TSI logo are registered trademarks of TSI Incorporated.
PresSura is a trademark of TSI Incorporated.
Qty
1
1
800646 / 863108
1
800647 / 863109
or
1
Description
Pressure sensor
Sensor cable
8631-HM /
8631-HM-BAC Room
pressure monitor
8631-HC / 8631-HCBAC 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 either an:
800380
1
Electric actuator
800199
1
Controller output
cable
Pressure Sensor Installation
Figure 2: Pressure Sensor Orientation and Mounting Template
WARNING: 800243 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” 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 18
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 Figures 7, 8, or
9. 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
p. 3 of 11
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
Figure 5: Transformer Installation
Each system must be installed
with supplied transformer. If
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 YELLOW wire 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. 4 of 11
Pressure Controller Installation
Pressure Controller Rough-in

Select the mounting location of the pressure 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 controller cover to the right and remove three screws holding the electronics to the
base (Figure 6). Remove base.

Install the base to the 4”  4” electrical box. The base’s “THIS SIDE UP” arrow must be pointing towards
the ceiling.
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.
Figure 6: Pressure Controller Mounting
Pressure Controller Wiring
WARNING:
Do not connect more than 24 VAC to any terminal.
Do not apply voltage to the RS-485 output, BACnet 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 (Figures 7, 8, and 9) or Damper Versions (Figures 10 and
11) 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. 5 of 11
WARNING:
Monitor must be wired exactly as wire diagram shows. Making modifications to the wiring
may severely damage the unit.
Figure 7: Wiring Diagram - Monitor Version
p. 6 of 11
Figure 8: Wiring Diagram – Monitor Optional Second Sensor
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 9: Wiring Diagram - Controller (VFD) Version
p. 8 of 11
Figure 10: Wiring Diagram – Controller Optional Second Sensor
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 11: Wiring Diagram - Damper with Electric Actuator Version
p. 10 of 11
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 12).

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).
Figure 12: Proper Damper Mounting
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.
USA
UK
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Tel: +44 149 4 459200
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Tel: +49 241 523030
P/N 1980490 Rev. J
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