TSI Incorporated 8635 SUREFLOW, PRESSURA 8630 Installation Instructions Manual

MODEL 8635 SUREFLOW™

This product is classified by Underwriters Laboratories, Inc.® for use in through-penetration
firestop systems. See UL fire resistance directory.

Figure 1: Typical Installation

Component List

Part Number Qty Description

800326 1 Pressure sensor

800248 1 Sensor cable

800222 1 Room pressure monitor

800420 1 Transformer

800414 1 Transformer cable

1901057 2 Intumescent ring

2923020 1 Fire sealant

ROOM PRESSURE MONITOR

INSTALLATION INSTRUCTIONS

WARNING: The Model 8635 Room Pressure Monitor 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
(laboratory) and referenced space (hallway).

These installation instructions guide the installer through the installation of the TSI Model 8635 SureFlow™
Room Pressure Monitor. Please read these instructions thoroughly before beginning installation.

_____________________
TSI and TSI logo are registered trademarks of TSI Incorporated.
SureFlow is a trademark of TSI Incorporated.

Pressure Sensor Installation

Figure 2: Pressure Sensor Orientation and Mounting Template

WARNING: 800326 pressure sensor must

be mounted through the wall between the
controlled space (laboratory) and
referenced space (hallway), exactly as
shown in Figure 2 and 3.

1. Determine pressure sensor location

(Figures 1, 2 and 3). Pressure sensor
typically mounts in the reference space, and
the dummy housing mounts in the
laboratory.

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-inch hole. Dummy sensor will be 2”
off center on other side of wall.

2. 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.

3. Drill a 2¼-inch hole through each side of

the wall to accept the sensor tube.

4. Drill a 7/8 inch 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.

5. 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.

6. 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 is not long
enough add a 1” to 2” adapter and extend

with 2" OD tube. The base of the dummy
housing will need to be drilled out to

accommodate 2” tube. DO NOT extend
sensor tube with 1” tubing.

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