SilentKnight HFS-PT User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS

REVISED

by the Graphic Development Department

Please review all content carefully.

9:49 am, Oct 14, 2009

HFS-P and HFS-PT

I56-3483-000R

Intelligent Photoelectric Smoke Sensors
with Plug-In Detector Base

SPECIFICATIONS

Operating Voltage Range: 15 to 32 VDC
Standby Current: 300µA @ 24 VDC (one communication every 5 seconds with LED blink enabled)
Maximum Alarm Current (LED on): 6.5 mA @ 24 VDC
Operating Humidity Range: 10% to 93% Relative Humidity, Non-condensing
Operating Temperature Range: 32°F to 120°F (0°C to 49°C), HFS-P; 32°F to 100°F (0°C to 38°C), HFS-PT
Air Velocity: 0 to 4000 ft/min
Height: 2.0˝ (51 mm)
Diameter: 6.1˝ (155 mm)
Weight: 5.7 oz. (162 g)
Mounting: 4˝ (102 mm) square box with or without plaster ring; Minimum Depth – 1½˝ (38 mm)
4˝ Octagon Box; Minimum Depth – 1½˝ (38 mm)
3½˝ Octagon Box; Minimum Depth – 1½˝ (38 mm)
Single Gang Box; Minimum Depth – 1½˝ (38 mm)

This sensor must be installed in compliance with the control panel system
installation manual. The installation must meet the requirements of the Au­thority Having Jurisdiction (AHJ). Sensors offer maximum performance when
installed in compliance with the National Fire Protection Association (NFPA);
see NFPA 72.

GENERAL DESCRIPTION

Models HFS-P and HFS-PT are plug-in type smoke sensors with a plug-in de­tector base that combine a photoelectronic sensing chamber with address­able-analog communications. The sensors transmit an analog representation
of smoke density over a communication line to a control panel. Rotary de­cade switches are provided for setting the sensor’s address. The detector is
intended for use in a 2-wire intelligent system, with screw terminals provided
for power (+ and –).

Two LEDs on the sensor are controlled by the panel to indicate sensor sta­tus. Model HFS-PT combines a photoelectronic sensing chamber and 135°F
(57.2°C) fixed temperature heat detector.

The HFS-P and HFS-PT require compatible addressable communications to func­tion properly. Connect these sensors to listed-compatible control panels only.

Communication takes place over the power (+ and –) lines.

BASE TERMINALS (SEE FIGURE 1)

NO. FUNCTION
1 Power (–)
2 Power (+)

SPACING

Space sensors in compliance with NFPA 72. In low air flow applications with
smooth ceilings, space sensors 30 feet apart. For specific information regard­ing sensor spacing, placement, and special applications, refer to NFPA 72 or
the System Smoke Detector Application Guide.

NOTE: These products are not listed for use inside duct smoke detectors.

MOUNTING

This detector base mounts directly to 3½- and 4-inch octagon boxes, 4-inch
square boxes (with or without plaster rings, see Figure 2), and single gang
boxes. Install the base on the box using the screws supplied with the junction
box and the appropriate mounting slots in the base.

WIRING GUIDE

All wiring must be installed in compliance with the National Electrical Code,
applicable local codes, and any special requirements of the Authority Hav­ing Jurisdiction. Proper wire gauges should be used. The conductors used to
connect smoke detectors to control panels and accessory devices should be
color-coded to reduce the likelihood of wiring errors. Improper connections
will prevent a system from responding properly in the event of a fire.

For signal wiring (the wiring between interconnected detectors), it is recom­mended that the wire be no smaller than AWG 18. However, the screws and
clamping plate in the base can accommodate wire sizes up to AWG 12. The
use of twisted pair wiring or shielded cable for the power (+ and –) loop is
recommended to minimize the effects of electrical interference.

HW-400-005 1 I56-3483-000R

FIGURE 1. TERMINAL LAYOUT :

2

1

FIGURE 2. MOUNTING DETECTOR TO BOX:

12 Clintonville Road

Northford, CT 06472-1653

Phone: [phone]

BASE

TERMINALS

C0127-01

SCREWS

(NOT SUPPLIED)

DETECTOR
BASE

BOX

(NOT SUPPLIED)

C0128-02

LED

LED

MAGNET
TEST MARKER

TAMPER-RESISTANT SLOT

LED

MAGNET
TEST MARKER

If shielded cable is used, the shield connection to and from the detector must

CAUTION

TENS ONES

9

10

11
12

13

14

15

8

7

6

5

4

3

2

1

0

9

8

7

6

5

4

3

2

1

0

CAUTION: DO NOT LOOP WIRE

be continuous by using wire nuts, crimping, or soldering, as appropriate for a
reliable connection.

Make electrical connections by stripping about 3/8 inch (10 mm) of insulation
from the end of the wire (use strip gauge molded in base), sliding the bare end
of the wire under the clamping plate, and tightening the clamping plate screw.
Do not loop the wire under the clamping plate.

The zone wiring of the detector base should be checked before the detector
heads are installed in them. The wiring should be checked for continuity and
polarity in the base, and dielectric tests should be performed.

The base includes a label for recording the zone, address, and type of detector
being installed. This information is important to set the address of the detector
head that will later be plugged into the base and to verify the type required
for that location.

Remove power from the communication line before installing sensors.

1. Wire the sensor base per the wiring diagram, Figure 3.

2. Reference the control panel device address map to determine appropriate
addressing.

3. Set the desired address on the sensor address switches, see Figure 4.

4. Install the sensor into the sensor base. Push the sensor into the base
while turning it clockwise to secure it in place.

5. After all sensors have been installed, apply power to the control unit and
activate the communication line.

6. Test the sensor(s) as described in the TESTING section of this manual.

TAMPER-RESISTANCE

The Tamper Resistant Tab, in the Detector Mounting Base, can make the de­tector tamper-resistant by making it necessary to use a small screwdriver or
similar tool to detach the detector from the base.

To make the detector tamper-resistant, use needle-nose pliers to break the
smaller tab at the scribed line on the tamper resistant tab. Figures 5 and 6
show the location of this tab on the detector mounting bracket.

To remove the detector from the base after it has been made tamper resistant,
insert a small screwdriver into the notch, as indicated in Figure 1, and press
the plastic lever toward the mounting surface before rotating the detector
counterclockwise for removal.

FIGURE 5: ENABLING THE TAMPER-RESISTANT CAPABILITY

PLASTIC LEVER

BREAK TAB AT DOTTED LINE BY
TWISTING TOWARD CENTER OF BASE

FIGURE 6:

USE SMALL-BLADED SCREWDRIVER TO PUSH
PLASTIC LEVER IN DIRECTION OF ARROW

CO130-00

Dust covers provide limited protection against airborne dust particles during ship­ping. Dust covers must be removed before the sensors can sense smoke. Remove
sensors prior to heavy remodeling or construction.

TESTING

FIGURE 3. WIRING DIAGRAM:

+

CONTROL PANEL

–

UL LISTED COMPATIBLE

–
+

FIGURE 4. ROTARY ADDRESS SWITCHES:

OPTIONAL RETURN LOOP

HW-400-005 2 I56-3483-000R

UNDER TERMINAL 1 OR 2.
BREAK WIRE RUN TO PROVIDE
SUPERVISION OF CONNECTIONS.

C0100-03

C0162-00

Before testing, notify the proper authorities that the system is undergoing
maintenance, and will temporarily be out of service. Disable the system to
prevent unwanted alarms.

All sensors must be tested after installation and periodically thereafter. Test­ing methods must satisfy the Authority Having Jurisdiction (AHJ). Sensors
offer maximum performance when tested and maintained in compliance with
NFPA 72.

The sensor can be tested in the following ways:

A. Functional: Magnet Test (P/N M02-04-01 or M02-09-00)

This sensor can be functionally tested with a test magnet. The test mag-

net electronically simulates smoke in the sensing chamber, testing the
sensor electronics and connections to the control panel.

1. Hold the test magnet in the magnet test area as shown in Figure 6.

2. The sensor should alarm the panel.

Two LEDs on the sensor are controlled by the panel to indicate sensor

status. Coded signals, transmitted from the panel, can cause the LEDs
to blink, latch on, or latch off. Refer to the control panel technical docu­mentation for sensor LED status operation and expected delay to alarm.

B. Smoke Entry

The GEMINI model 501 aerosol generator can be used for smoke entry

testing. Set the generator to represent 4%/ft to 5%/ft obscuration as de­scribed in the GEMINI 501 manual. Using the bowl shaped applicator,
apply aerosol until the panel alarms.

Additionally, canned aerosol simulated smoke (canned smoke agent)

may be used for smoke entry testing of the smoke detector. Tested and
approved aerosol smoke products are:

MANUFACTURER MODEL

Home Safeguard Industries 25S

SDi CHEK02 and CHEK06

SDi SOLOA4

SDi SMOKESABRE-01

C0196-02